Merge "Enable background restrictions"
diff --git a/api/current.txt b/api/current.txt
index ea35ee0..b442071 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -1378,7 +1378,7 @@
     field public static final int toYDelta = 16843209; // 0x10101c9
     field public static final int toYScale = 16843205; // 0x10101c5
     field public static final int toolbarStyle = 16843946; // 0x10104aa
-    field public static final int tooltip = 16844084; // 0x1010534
+    field public static final int tooltipText = 16844084; // 0x1010534
     field public static final int top = 16843182; // 0x10101ae
     field public static final int topBright = 16842955; // 0x10100cb
     field public static final int topDark = 16842951; // 0x10100c7
@@ -4837,11 +4837,13 @@
   public static class Instrumentation.ActivityMonitor {
     ctor public Instrumentation.ActivityMonitor(android.content.IntentFilter, android.app.Instrumentation.ActivityResult, boolean);
     ctor public Instrumentation.ActivityMonitor(java.lang.String, android.app.Instrumentation.ActivityResult, boolean);
+    ctor public Instrumentation.ActivityMonitor();
     method public final android.content.IntentFilter getFilter();
     method public final int getHits();
     method public final android.app.Activity getLastActivity();
     method public final android.app.Instrumentation.ActivityResult getResult();
     method public final boolean isBlocking();
+    method public android.app.Instrumentation.ActivityResult onMatchIntent(android.content.Intent);
     method public final android.app.Activity waitForActivity();
     method public final android.app.Activity waitForActivityWithTimeout(long);
   }
@@ -12596,7 +12598,6 @@
     method public int getFontMetricsInt(android.graphics.Paint.FontMetricsInt);
     method public android.graphics.Paint.FontMetricsInt getFontMetricsInt();
     method public float getFontSpacing();
-    method public java.lang.String getFontVariationSettings();
     method public int getHinting();
     method public float getLetterSpacing();
     method public android.graphics.MaskFilter getMaskFilter();
@@ -12654,7 +12655,6 @@
     method public void setFilterBitmap(boolean);
     method public void setFlags(int);
     method public void setFontFeatureSettings(java.lang.String);
-    method public void setFontVariationSettings(java.lang.String);
     method public void setHinting(int);
     method public void setLetterSpacing(float);
     method public void setLinearText(boolean);
@@ -42907,7 +42907,7 @@
     method public abstract android.view.SubMenu getSubMenu();
     method public abstract java.lang.CharSequence getTitle();
     method public abstract java.lang.CharSequence getTitleCondensed();
-    method public default java.lang.CharSequence getTooltip();
+    method public default java.lang.CharSequence getTooltipText();
     method public abstract boolean hasSubMenu();
     method public abstract boolean isActionViewExpanded();
     method public abstract boolean isCheckable();
@@ -42934,7 +42934,7 @@
     method public abstract android.view.MenuItem setTitle(java.lang.CharSequence);
     method public abstract android.view.MenuItem setTitle(int);
     method public abstract android.view.MenuItem setTitleCondensed(java.lang.CharSequence);
-    method public default android.view.MenuItem setTooltip(java.lang.CharSequence);
+    method public default android.view.MenuItem setTooltipText(java.lang.CharSequence);
     method public abstract android.view.MenuItem setVisible(boolean);
     field public static final int SHOW_AS_ACTION_ALWAYS = 2; // 0x2
     field public static final int SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW = 8; // 0x8
@@ -43628,7 +43628,8 @@
     method public java.lang.Object getTag(int);
     method public int getTextAlignment();
     method public int getTextDirection();
-    method public final java.lang.CharSequence getTooltip();
+    method public final deprecated java.lang.CharSequence getTooltip();
+    method public final java.lang.CharSequence getTooltipText();
     method public final int getTop();
     method protected float getTopFadingEdgeStrength();
     method protected int getTopPaddingOffset();
@@ -43929,7 +43930,8 @@
     method public void setTag(int, java.lang.Object);
     method public void setTextAlignment(int);
     method public void setTextDirection(int);
-    method public final void setTooltip(java.lang.CharSequence);
+    method public final deprecated void setTooltip(java.lang.CharSequence);
+    method public final void setTooltipText(java.lang.CharSequence);
     method public final void setTop(int);
     method public void setTouchDelegate(android.view.TouchDelegate);
     method public final void setTransitionName(java.lang.String);
@@ -49345,7 +49347,6 @@
     method public int getExtendedPaddingTop();
     method public android.text.InputFilter[] getFilters();
     method public java.lang.String getFontFeatureSettings();
-    method public java.lang.String getFontVariationSettings();
     method public boolean getFreezesText();
     method public int getGravity();
     method public int getHighlightColor();
@@ -49451,7 +49452,6 @@
     method public void setExtractedText(android.view.inputmethod.ExtractedText);
     method public void setFilters(android.text.InputFilter[]);
     method public void setFontFeatureSettings(java.lang.String);
-    method public void setFontVariationSettings(java.lang.String);
     method protected boolean setFrame(int, int, int, int);
     method public void setFreezesText(boolean);
     method public void setGravity(int);
diff --git a/api/system-current.txt b/api/system-current.txt
index 3f6e6fa..a91de86 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -1491,7 +1491,7 @@
     field public static final int toYDelta = 16843209; // 0x10101c9
     field public static final int toYScale = 16843205; // 0x10101c5
     field public static final int toolbarStyle = 16843946; // 0x10104aa
-    field public static final int tooltip = 16844084; // 0x1010534
+    field public static final int tooltipText = 16844084; // 0x1010534
     field public static final int top = 16843182; // 0x10101ae
     field public static final int topBright = 16842955; // 0x10100cb
     field public static final int topDark = 16842951; // 0x10100c7
@@ -4994,11 +4994,13 @@
   public static class Instrumentation.ActivityMonitor {
     ctor public Instrumentation.ActivityMonitor(android.content.IntentFilter, android.app.Instrumentation.ActivityResult, boolean);
     ctor public Instrumentation.ActivityMonitor(java.lang.String, android.app.Instrumentation.ActivityResult, boolean);
+    ctor public Instrumentation.ActivityMonitor();
     method public final android.content.IntentFilter getFilter();
     method public final int getHits();
     method public final android.app.Activity getLastActivity();
     method public final android.app.Instrumentation.ActivityResult getResult();
     method public final boolean isBlocking();
+    method public android.app.Instrumentation.ActivityResult onMatchIntent(android.content.Intent);
     method public final android.app.Activity waitForActivity();
     method public final android.app.Activity waitForActivityWithTimeout(long);
   }
@@ -6748,6 +6750,7 @@
     method public boolean isBackupEnabled();
     method public java.lang.String[] listAllTransports();
     method public int requestBackup(java.lang.String[], android.app.backup.BackupObserver);
+    method public int requestBackup(java.lang.String[], android.app.backup.BackupObserver, int);
     method public int requestRestore(android.app.backup.RestoreObserver);
     method public java.lang.String selectBackupTransport(java.lang.String);
     method public void setAutoRestore(boolean);
@@ -6758,6 +6761,8 @@
     field public static final int ERROR_TRANSPORT_ABORTED = -1000; // 0xfffffc18
     field public static final int ERROR_TRANSPORT_PACKAGE_REJECTED = -1002; // 0xfffffc16
     field public static final int ERROR_TRANSPORT_QUOTA_EXCEEDED = -1005; // 0xfffffc13
+    field public static final int FLAG_NON_INCREMENTAL_BACKUP = 1; // 0x1
+    field public static final java.lang.String PACKAGE_MANAGER_SENTINEL = "@pm@";
     field public static final int SUCCESS = 0; // 0x0
   }
 
@@ -13111,7 +13116,6 @@
     method public int getFontMetricsInt(android.graphics.Paint.FontMetricsInt);
     method public android.graphics.Paint.FontMetricsInt getFontMetricsInt();
     method public float getFontSpacing();
-    method public java.lang.String getFontVariationSettings();
     method public int getHinting();
     method public float getLetterSpacing();
     method public android.graphics.MaskFilter getMaskFilter();
@@ -13169,7 +13173,6 @@
     method public void setFilterBitmap(boolean);
     method public void setFlags(int);
     method public void setFontFeatureSettings(java.lang.String);
-    method public void setFontVariationSettings(java.lang.String);
     method public void setHinting(int);
     method public void setLetterSpacing(float);
     method public void setLinearText(boolean);
@@ -46167,7 +46170,7 @@
     method public abstract android.view.SubMenu getSubMenu();
     method public abstract java.lang.CharSequence getTitle();
     method public abstract java.lang.CharSequence getTitleCondensed();
-    method public default java.lang.CharSequence getTooltip();
+    method public default java.lang.CharSequence getTooltipText();
     method public abstract boolean hasSubMenu();
     method public abstract boolean isActionViewExpanded();
     method public abstract boolean isCheckable();
@@ -46194,7 +46197,7 @@
     method public abstract android.view.MenuItem setTitle(java.lang.CharSequence);
     method public abstract android.view.MenuItem setTitle(int);
     method public abstract android.view.MenuItem setTitleCondensed(java.lang.CharSequence);
-    method public default android.view.MenuItem setTooltip(java.lang.CharSequence);
+    method public default android.view.MenuItem setTooltipText(java.lang.CharSequence);
     method public abstract android.view.MenuItem setVisible(boolean);
     field public static final int SHOW_AS_ACTION_ALWAYS = 2; // 0x2
     field public static final int SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW = 8; // 0x8
@@ -46888,7 +46891,8 @@
     method public java.lang.Object getTag(int);
     method public int getTextAlignment();
     method public int getTextDirection();
-    method public final java.lang.CharSequence getTooltip();
+    method public final deprecated java.lang.CharSequence getTooltip();
+    method public final java.lang.CharSequence getTooltipText();
     method public final int getTop();
     method protected float getTopFadingEdgeStrength();
     method protected int getTopPaddingOffset();
@@ -47189,7 +47193,8 @@
     method public void setTag(int, java.lang.Object);
     method public void setTextAlignment(int);
     method public void setTextDirection(int);
-    method public final void setTooltip(java.lang.CharSequence);
+    method public final deprecated void setTooltip(java.lang.CharSequence);
+    method public final void setTooltipText(java.lang.CharSequence);
     method public final void setTop(int);
     method public void setTouchDelegate(android.view.TouchDelegate);
     method public final void setTransitionName(java.lang.String);
@@ -52965,7 +52970,6 @@
     method public int getExtendedPaddingTop();
     method public android.text.InputFilter[] getFilters();
     method public java.lang.String getFontFeatureSettings();
-    method public java.lang.String getFontVariationSettings();
     method public boolean getFreezesText();
     method public int getGravity();
     method public int getHighlightColor();
@@ -53071,7 +53075,6 @@
     method public void setExtractedText(android.view.inputmethod.ExtractedText);
     method public void setFilters(android.text.InputFilter[]);
     method public void setFontFeatureSettings(java.lang.String);
-    method public void setFontVariationSettings(java.lang.String);
     method protected boolean setFrame(int, int, int, int);
     method public void setFreezesText(boolean);
     method public void setGravity(int);
diff --git a/api/test-current.txt b/api/test-current.txt
index 2a9b067..3748658 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -1378,7 +1378,7 @@
     field public static final int toYDelta = 16843209; // 0x10101c9
     field public static final int toYScale = 16843205; // 0x10101c5
     field public static final int toolbarStyle = 16843946; // 0x10104aa
-    field public static final int tooltip = 16844084; // 0x1010534
+    field public static final int tooltipText = 16844084; // 0x1010534
     field public static final int top = 16843182; // 0x10101ae
     field public static final int topBright = 16842955; // 0x10100cb
     field public static final int topDark = 16842951; // 0x10100c7
@@ -4847,11 +4847,13 @@
   public static class Instrumentation.ActivityMonitor {
     ctor public Instrumentation.ActivityMonitor(android.content.IntentFilter, android.app.Instrumentation.ActivityResult, boolean);
     ctor public Instrumentation.ActivityMonitor(java.lang.String, android.app.Instrumentation.ActivityResult, boolean);
+    ctor public Instrumentation.ActivityMonitor();
     method public final android.content.IntentFilter getFilter();
     method public final int getHits();
     method public final android.app.Activity getLastActivity();
     method public final android.app.Instrumentation.ActivityResult getResult();
     method public final boolean isBlocking();
+    method public android.app.Instrumentation.ActivityResult onMatchIntent(android.content.Intent);
     method public final android.app.Activity waitForActivity();
     method public final android.app.Activity waitForActivityWithTimeout(long);
   }
@@ -12628,7 +12630,6 @@
     method public int getFontMetricsInt(android.graphics.Paint.FontMetricsInt);
     method public android.graphics.Paint.FontMetricsInt getFontMetricsInt();
     method public float getFontSpacing();
-    method public java.lang.String getFontVariationSettings();
     method public int getHinting();
     method public float getLetterSpacing();
     method public android.graphics.MaskFilter getMaskFilter();
@@ -12686,7 +12687,6 @@
     method public void setFilterBitmap(boolean);
     method public void setFlags(int);
     method public void setFontFeatureSettings(java.lang.String);
-    method public void setFontVariationSettings(java.lang.String);
     method public void setHinting(int);
     method public void setLetterSpacing(float);
     method public void setLinearText(boolean);
@@ -43196,7 +43196,7 @@
     method public abstract android.view.SubMenu getSubMenu();
     method public abstract java.lang.CharSequence getTitle();
     method public abstract java.lang.CharSequence getTitleCondensed();
-    method public default java.lang.CharSequence getTooltip();
+    method public default java.lang.CharSequence getTooltipText();
     method public abstract boolean hasSubMenu();
     method public abstract boolean isActionViewExpanded();
     method public abstract boolean isCheckable();
@@ -43223,7 +43223,7 @@
     method public abstract android.view.MenuItem setTitle(java.lang.CharSequence);
     method public abstract android.view.MenuItem setTitle(int);
     method public abstract android.view.MenuItem setTitleCondensed(java.lang.CharSequence);
-    method public default android.view.MenuItem setTooltip(java.lang.CharSequence);
+    method public default android.view.MenuItem setTooltipText(java.lang.CharSequence);
     method public abstract android.view.MenuItem setVisible(boolean);
     field public static final int SHOW_AS_ACTION_ALWAYS = 2; // 0x2
     field public static final int SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW = 8; // 0x8
@@ -43919,7 +43919,8 @@
     method public java.lang.Object getTag(int);
     method public int getTextAlignment();
     method public int getTextDirection();
-    method public final java.lang.CharSequence getTooltip();
+    method public final deprecated java.lang.CharSequence getTooltip();
+    method public final java.lang.CharSequence getTooltipText();
     method public android.view.View getTooltipView();
     method public final int getTop();
     method protected float getTopFadingEdgeStrength();
@@ -44221,7 +44222,8 @@
     method public void setTag(int, java.lang.Object);
     method public void setTextAlignment(int);
     method public void setTextDirection(int);
-    method public final void setTooltip(java.lang.CharSequence);
+    method public final deprecated void setTooltip(java.lang.CharSequence);
+    method public final void setTooltipText(java.lang.CharSequence);
     method public final void setTop(int);
     method public void setTouchDelegate(android.view.TouchDelegate);
     method public final void setTransitionName(java.lang.String);
@@ -49649,7 +49651,6 @@
     method public int getExtendedPaddingTop();
     method public android.text.InputFilter[] getFilters();
     method public java.lang.String getFontFeatureSettings();
-    method public java.lang.String getFontVariationSettings();
     method public boolean getFreezesText();
     method public int getGravity();
     method public int getHighlightColor();
@@ -49755,7 +49756,6 @@
     method public void setExtractedText(android.view.inputmethod.ExtractedText);
     method public void setFilters(android.text.InputFilter[]);
     method public void setFontFeatureSettings(java.lang.String);
-    method public void setFontVariationSettings(java.lang.String);
     method protected boolean setFrame(int, int, int, int);
     method public void setFreezesText(boolean);
     method public void setGravity(int);
diff --git a/cmds/bmgr/src/com/android/commands/bmgr/Bmgr.java b/cmds/bmgr/src/com/android/commands/bmgr/Bmgr.java
index 5bf8076..780db5e 100644
--- a/cmds/bmgr/src/com/android/commands/bmgr/Bmgr.java
+++ b/cmds/bmgr/src/com/android/commands/bmgr/Bmgr.java
@@ -270,7 +270,7 @@
         }
     }
 
-    private void backupNowAllPackages() {
+    private void backupNowAllPackages(boolean nonIncrementalBackup) {
         int userId = UserHandle.USER_SYSTEM;
         IPackageManager mPm =
                 IPackageManager.Stub.asInterface(ServiceManager.getService("package"));
@@ -297,14 +297,19 @@
                     System.err.println(BMGR_NOT_RUNNING_ERR);
                 }
             }
-            backupNowPackages(packages);
+            backupNowPackages(packages, nonIncrementalBackup);
         }
     }
 
-    private void backupNowPackages(List<String> packages) {
+    private void backupNowPackages(List<String> packages, boolean nonIncrementalBackup) {
+        int flags = 0;
+        if (nonIncrementalBackup) {
+            flags |= BackupManager.FLAG_NON_INCREMENTAL_BACKUP;
+        }
         try {
             BackupObserver observer = new BackupObserver();
-            int err = mBmgr.requestBackup(packages.toArray(new String[packages.size()]), observer);
+            int err = mBmgr.requestBackup(packages.toArray(new String[packages.size()]), observer,
+                    flags);
             if (err == 0) {
                 // Off and running -- wait for the backup to complete
                 observer.waitForCompletion();
@@ -320,24 +325,31 @@
     private void doBackupNow() {
         String pkg;
         boolean backupAll = false;
+        boolean nonIncrementalBackup = false;
         ArrayList<String> allPkgs = new ArrayList<String>();
         while ((pkg = nextArg()) != null) {
             if (pkg.equals("--all")) {
                 backupAll = true;
+            } else if (pkg.equals("--non-incremental")) {
+                nonIncrementalBackup = true;
+            } else if (pkg.equals("--incremental")) {
+                nonIncrementalBackup = false;
             } else {
                 allPkgs.add(pkg);
             }
         }
         if (backupAll) {
             if (allPkgs.size() == 0) {
-                System.out.println("Running backup for all packages.");
-                backupNowAllPackages();
+                System.out.println("Running " + (nonIncrementalBackup ? "non-" : "") +
+                        "incremental backup for all packages.");
+                backupNowAllPackages(nonIncrementalBackup);
             } else {
                 System.err.println("Provide only '--all' flag or list of packages.");
             }
         } else if (allPkgs.size() > 0) {
-            System.out.println("Running backup for " + allPkgs.size() +" requested packages.");
-            backupNowPackages(allPkgs);
+            System.out.println("Running " + (nonIncrementalBackup ? "non-" : "") +
+                    "incremental backup for " + allPkgs.size() +" requested packages.");
+            backupNowPackages(allPkgs, nonIncrementalBackup);
         } else {
             System.err.println("Provide '--all' flag or list of packages.");
         }
diff --git a/core/java/android/app/ActivityThread.java b/core/java/android/app/ActivityThread.java
index 74614cc..d814ddc 100644
--- a/core/java/android/app/ActivityThread.java
+++ b/core/java/android/app/ActivityThread.java
@@ -4919,18 +4919,27 @@
     }
 
     void handleApplicationInfoChanged(@NonNull final ApplicationInfo ai) {
+        // Updates triggered by package installation go through a package update
+        // receiver. Here we try to capture ApplicationInfo changes that are
+        // caused by other sources, such as overlays. That means we want to be as conservative
+        // about code changes as possible. Take the diff of the old ApplicationInfo and the new
+        // to see if anything needs to change.
         synchronized (mResourcesManager) {
             // Update all affected loaded packages with new package information
             WeakReference<LoadedApk> ref = mPackages.get(ai.packageName);
             LoadedApk apk = ref != null ? ref.get() : null;
             if (apk != null) {
-                apk.updateApplicationInfo(ai, null);
+                final ArrayList<String> oldPaths = new ArrayList<>();
+                LoadedApk.makePaths(this, apk.getApplicationInfo(), oldPaths, null /*outLibPaths*/);
+                apk.updateApplicationInfo(ai, oldPaths);
             }
 
             ref = mResourcePackages.get(ai.packageName);
             apk = ref != null ? ref.get() : null;
             if (apk != null) {
-                apk.updateApplicationInfo(ai, null);
+                final ArrayList<String> oldPaths = new ArrayList<>();
+                LoadedApk.makePaths(this, apk.getApplicationInfo(), oldPaths, null /*outLibPaths*/);
+                apk.updateApplicationInfo(ai, oldPaths);
             }
 
             // Update all affected Resources objects to use new ResourcesImpl
diff --git a/core/java/android/app/ApplicationPackageManager.java b/core/java/android/app/ApplicationPackageManager.java
index f3185a8..20f7e63 100644
--- a/core/java/android/app/ApplicationPackageManager.java
+++ b/core/java/android/app/ApplicationPackageManager.java
@@ -24,6 +24,7 @@
 import android.app.admin.DevicePolicyManager;
 import android.content.ComponentName;
 import android.content.ContentResolver;
+import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.IntentSender;
@@ -1386,7 +1387,7 @@
         }
     }
 
-    ApplicationPackageManager(ContextImpl context,
+    protected ApplicationPackageManager(ContextImpl context,
                               IPackageManager pm) {
         mContext = context;
         mPM = pm;
@@ -1820,6 +1821,12 @@
     @Override
     public @Nullable VolumeInfo getPackageCurrentVolume(ApplicationInfo app) {
         final StorageManager storage = mContext.getSystemService(StorageManager.class);
+        return getPackageCurrentVolume(app, storage);
+    }
+
+    @VisibleForTesting
+    protected @Nullable VolumeInfo getPackageCurrentVolume(ApplicationInfo app,
+            StorageManager storage) {
         if (app.isInternal()) {
             return storage.findVolumeById(VolumeInfo.ID_PRIVATE_INTERNAL);
         } else if (app.isExternalAsec()) {
@@ -1831,25 +1838,43 @@
 
     @Override
     public @NonNull List<VolumeInfo> getPackageCandidateVolumes(ApplicationInfo app) {
-        final StorageManager storage = mContext.getSystemService(StorageManager.class);
-        final VolumeInfo currentVol = getPackageCurrentVolume(app);
-        final List<VolumeInfo> vols = storage.getVolumes();
+        final StorageManager storageManager = mContext.getSystemService(StorageManager.class);
+        return getPackageCandidateVolumes(app, storageManager, mPM);
+    }
+
+    @VisibleForTesting
+    protected @NonNull List<VolumeInfo> getPackageCandidateVolumes(ApplicationInfo app,
+            StorageManager storageManager, IPackageManager pm) {
+        final VolumeInfo currentVol = getPackageCurrentVolume(app, storageManager);
+        final List<VolumeInfo> vols = storageManager.getVolumes();
         final List<VolumeInfo> candidates = new ArrayList<>();
         for (VolumeInfo vol : vols) {
-            if (Objects.equals(vol, currentVol) || isPackageCandidateVolume(mContext, app, vol)) {
+            if (Objects.equals(vol, currentVol)
+                    || isPackageCandidateVolume(mContext, app, vol, pm)) {
                 candidates.add(vol);
             }
         }
         return candidates;
     }
 
-    private boolean isPackageCandidateVolume(
-            ContextImpl context, ApplicationInfo app, VolumeInfo vol) {
-        final boolean forceAllowOnExternal = Settings.Global.getInt(
+    @VisibleForTesting
+    protected boolean isForceAllowOnExternal(Context context) {
+        return Settings.Global.getInt(
                 context.getContentResolver(), Settings.Global.FORCE_ALLOW_ON_EXTERNAL, 0) != 0;
-        // Private internal is always an option
+    }
+
+    @VisibleForTesting
+    protected boolean isAllow3rdPartyOnInternal(Context context) {
+        return context.getResources().getBoolean(
+                com.android.internal.R.bool.config_allow3rdPartyAppOnInternal);
+    }
+
+    private boolean isPackageCandidateVolume(
+            ContextImpl context, ApplicationInfo app, VolumeInfo vol, IPackageManager pm) {
+        final boolean forceAllowOnExternal = isForceAllowOnExternal(context);
+
         if (VolumeInfo.ID_PRIVATE_INTERNAL.equals(vol.getId())) {
-            return true;
+            return app.isSystemApp() || isAllow3rdPartyOnInternal(context);
         }
 
         // System apps and apps demanding internal storage can't be moved
@@ -1875,7 +1900,7 @@
 
         // Some apps can't be moved. (e.g. device admins)
         try {
-            if (mPM.isPackageDeviceAdminOnAnyUser(app.packageName)) {
+            if (pm.isPackageDeviceAdminOnAnyUser(app.packageName)) {
                 return false;
             }
         } catch (RemoteException e) {
diff --git a/core/java/android/app/Instrumentation.java b/core/java/android/app/Instrumentation.java
index cc7981c..b1bdea1 100644
--- a/core/java/android/app/Instrumentation.java
+++ b/core/java/android/app/Instrumentation.java
@@ -443,6 +443,7 @@
         private final String mClass;
         private final ActivityResult mResult;
         private final boolean mBlock;
+        private final boolean mIgnoreMatchingSpecificIntents;
 
 
         // This is protected by 'Instrumentation.this.mSync'.
@@ -454,7 +455,7 @@
         /**
          * Create a new ActivityMonitor that looks for a particular kind of 
          * intent to be started.
-         *  
+         *
          * @param which The set of intents this monitor is responsible for.
          * @param result A canned result to return if the monitor is hit; can 
          *               be null.
@@ -470,6 +471,7 @@
             mClass = null;
             mResult = result;
             mBlock = block;
+            mIgnoreMatchingSpecificIntents = false;
         }
 
         /**
@@ -491,6 +493,34 @@
             mClass = cls;
             mResult = result;
             mBlock = block;
+            mIgnoreMatchingSpecificIntents = false;
+        }
+
+        /**
+         * Create a new ActivityMonitor that can be used for intercepting any activity to be
+         * started.
+         *
+         * <p> When an activity is started, {@link #onMatchIntent(Intent)} will be called on
+         * instances created using this constructor to see if it is a hit.
+         *
+         * @see #onMatchIntent(Intent)
+         */
+        public ActivityMonitor() {
+            mWhich = null;
+            mClass = null;
+            mResult = null;
+            mBlock = false;
+            mIgnoreMatchingSpecificIntents = true;
+        }
+
+        /**
+         * @return true if this monitor is used for intercepting any started activity by calling
+         *         into {@link #onMatchIntent(Intent)}, false if this monitor is only used
+         *         for specific intents corresponding to the intent filter or activity class
+         *         passed in the constructor.
+         */
+        final boolean ignoreMatchingSpecificIntents() {
+            return mIgnoreMatchingSpecificIntents;
         }
 
         /**
@@ -577,10 +607,31 @@
                 }
             }
         }
-        
+
+        /**
+         * Used for intercepting any started activity.
+         *
+         * <p> A non-null return value here will be considered a hit for this monitor.
+         * By default this will return {@code null} and subclasses can override this to return
+         * a non-null value if the intent needs to be intercepted.
+         *
+         * <p> Whenever a new activity is started, this method will be called on instances created
+         * using {@link #Instrumentation.ActivityMonitor()} to check if there is a match. In case
+         * of a match, the activity start will be blocked and the returned result will be used.
+         *
+         * @param intent The intent used for starting the activity.
+         * @return The {@link ActivityResult} that needs to be used in case of a match.
+         */
+        public ActivityResult onMatchIntent(Intent intent) {
+            return null;
+        }
+
         final boolean match(Context who,
                             Activity activity,
                             Intent intent) {
+            if (mIgnoreMatchingSpecificIntents) {
+                return false;
+            }
             synchronized (this) {
                 if (mWhich != null
                     && mWhich.match(who.getContentResolver(), intent,
@@ -1492,7 +1543,14 @@
                 final int N = mActivityMonitors.size();
                 for (int i=0; i<N; i++) {
                     final ActivityMonitor am = mActivityMonitors.get(i);
-                    if (am.match(who, null, intent)) {
+                    ActivityResult result = null;
+                    if (am.ignoreMatchingSpecificIntents()) {
+                        result = am.onMatchIntent(intent);
+                    }
+                    if (result != null) {
+                        am.mHits++;
+                        return result;
+                    } else if (am.match(who, null, intent)) {
                         am.mHits++;
                         if (am.isBlocking()) {
                             return requestCode >= 0 ? am.getResult() : null;
@@ -1548,7 +1606,14 @@
                 final int N = mActivityMonitors.size();
                 for (int i=0; i<N; i++) {
                     final ActivityMonitor am = mActivityMonitors.get(i);
-                    if (am.match(who, null, intents[0])) {
+                    ActivityResult result = null;
+                    if (am.ignoreMatchingSpecificIntents()) {
+                        result = am.onMatchIntent(intents[0]);
+                    }
+                    if (result != null) {
+                        am.mHits++;
+                        return;
+                    } else if (am.match(who, null, intents[0])) {
                         am.mHits++;
                         if (am.isBlocking()) {
                             return;
@@ -1611,7 +1676,14 @@
                 final int N = mActivityMonitors.size();
                 for (int i=0; i<N; i++) {
                     final ActivityMonitor am = mActivityMonitors.get(i);
-                    if (am.match(who, null, intent)) {
+                    ActivityResult result = null;
+                    if (am.ignoreMatchingSpecificIntents()) {
+                        result = am.onMatchIntent(intent);
+                    }
+                    if (result != null) {
+                        am.mHits++;
+                        return result;
+                    } else if (am.match(who, null, intent)) {
                         am.mHits++;
                         if (am.isBlocking()) {
                             return requestCode >= 0 ? am.getResult() : null;
@@ -1671,7 +1743,14 @@
                 final int N = mActivityMonitors.size();
                 for (int i=0; i<N; i++) {
                     final ActivityMonitor am = mActivityMonitors.get(i);
-                    if (am.match(who, null, intent)) {
+                    ActivityResult result = null;
+                    if (am.ignoreMatchingSpecificIntents()) {
+                        result = am.onMatchIntent(intent);
+                    }
+                    if (result != null) {
+                        am.mHits++;
+                        return result;
+                    } else if (am.match(who, null, intent)) {
                         am.mHits++;
                         if (am.isBlocking()) {
                             return requestCode >= 0 ? am.getResult() : null;
@@ -1710,7 +1789,14 @@
                 final int N = mActivityMonitors.size();
                 for (int i=0; i<N; i++) {
                     final ActivityMonitor am = mActivityMonitors.get(i);
-                    if (am.match(who, null, intent)) {
+                    ActivityResult result = null;
+                    if (am.ignoreMatchingSpecificIntents()) {
+                        result = am.onMatchIntent(intent);
+                    }
+                    if (result != null) {
+                        am.mHits++;
+                        return result;
+                    } else if (am.match(who, null, intent)) {
                         am.mHits++;
                         if (am.isBlocking()) {
                             return requestCode >= 0 ? am.getResult() : null;
@@ -1748,7 +1834,14 @@
                 final int N = mActivityMonitors.size();
                 for (int i=0; i<N; i++) {
                     final ActivityMonitor am = mActivityMonitors.get(i);
-                    if (am.match(who, null, intent)) {
+                    ActivityResult result = null;
+                    if (am.ignoreMatchingSpecificIntents()) {
+                        result = am.onMatchIntent(intent);
+                    }
+                    if (result != null) {
+                        am.mHits++;
+                        return;
+                    } else if (am.match(who, null, intent)) {
                         am.mHits++;
                         if (am.isBlocking()) {
                             return;
diff --git a/core/java/android/app/LoadedApk.java b/core/java/android/app/LoadedApk.java
index db1162a..4ab0743 100644
--- a/core/java/android/app/LoadedApk.java
+++ b/core/java/android/app/LoadedApk.java
@@ -16,6 +16,8 @@
 
 package android.app;
 
+import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
 import android.content.Context;
@@ -262,7 +264,15 @@
         return ai.sharedLibraryFiles;
     }
 
-    public void updateApplicationInfo(ApplicationInfo aInfo, List<String> oldPaths) {
+    /**
+     * Update the ApplicationInfo for an app. If oldPaths is null, all the paths are considered
+     * new.
+     * @param aInfo The new ApplicationInfo to use for this LoadedApk
+     * @param oldPaths The code paths for the old ApplicationInfo object. null means no paths can
+     *                 be reused.
+     */
+    public void updateApplicationInfo(@NonNull ApplicationInfo aInfo,
+            @Nullable List<String> oldPaths) {
         setApplicationInfo(aInfo);
 
         final List<String> newPaths = new ArrayList<>();
diff --git a/core/java/android/app/MediaRouteButton.java b/core/java/android/app/MediaRouteButton.java
index 09e95df..d2d7b6d 100644
--- a/core/java/android/app/MediaRouteButton.java
+++ b/core/java/android/app/MediaRouteButton.java
@@ -174,7 +174,7 @@
     @Override
     public void setContentDescription(CharSequence contentDescription) {
         super.setContentDescription(contentDescription);
-        setTooltip(contentDescription);
+        setTooltipText(contentDescription);
     }
 
     @Override
diff --git a/core/java/android/app/backup/BackupManager.java b/core/java/android/app/backup/BackupManager.java
index 80bc136..540683d 100644
--- a/core/java/android/app/backup/BackupManager.java
+++ b/core/java/android/app/backup/BackupManager.java
@@ -136,6 +136,27 @@
      */
     public static final String EXTRA_BACKUP_SERVICES_AVAILABLE = "backup_services_available";
 
+    /**
+     * If this flag is passed to {@link #requestBackup(String[], BackupObserver, int)},
+     * BackupManager will pass a blank old state to BackupAgents of requested packages.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final int FLAG_NON_INCREMENTAL_BACKUP = 1;
+
+    /**
+     * Use with {@link #requestBackup} to force backup of
+     * package meta data. Typically you do not need to explicitly request this be backed up as it is
+     * handled internally by the BackupManager. If you are requesting backups with
+     * FLAG_NON_INCREMENTAL, this package won't automatically be backed up and you have to
+     * explicitly request for its backup.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final String PACKAGE_MANAGER_SENTINEL = "@pm@";
+
     private Context mContext;
     private static IBackupManager sService;
 
@@ -484,13 +505,34 @@
      */
     @SystemApi
     public int requestBackup(String[] packages, BackupObserver observer) {
+        return requestBackup(packages, observer, 0);
+    }
+
+    /**
+     * Request an immediate backup, providing an observer to which results of the backup operation
+     * will be published. The Android backup system will decide for each package whether it will
+     * be full app data backup or key/value-pair-based backup.
+     *
+     * <p>If this method returns {@link BackupManager#SUCCESS}, the OS will attempt to backup all
+     * provided packages using the remote transport.
+     *
+     * @param packages List of package names to backup.
+     * @param observer The {@link BackupObserver} to receive callbacks during the backup
+     *                 operation. Could be {@code null}.
+     * @param flags    {@link #FLAG_NON_INCREMENTAL_BACKUP}.
+     * @return {@link BackupManager#SUCCESS} on success; nonzero on error.
+     * @throws IllegalArgumentException on null or empty {@code packages} param.
+     * @hide
+     */
+    @SystemApi
+    public int requestBackup(String[] packages, BackupObserver observer, int flags) {
         checkServiceBinder();
         if (sService != null) {
             try {
                 BackupObserverWrapper observerWrapper = observer == null
                         ? null
                         : new BackupObserverWrapper(mContext, observer);
-                return sService.requestBackup(packages, observerWrapper);
+                return sService.requestBackup(packages, observerWrapper, flags);
             } catch (RemoteException e) {
                 Log.e(TAG, "requestBackup() couldn't connect");
             }
diff --git a/core/java/android/app/backup/IBackupManager.aidl b/core/java/android/app/backup/IBackupManager.aidl
index a320bbf..fe23c28 100644
--- a/core/java/android/app/backup/IBackupManager.aidl
+++ b/core/java/android/app/backup/IBackupManager.aidl
@@ -357,7 +357,9 @@
      * @param observer The {@link BackupObserver} to receive callbacks during the backup
      * operation.
      *
+     * @param flags {@link BackupManager#FLAG_NON_INCREMENTAL_BACKUP}.
+     *
      * @return Zero on success; nonzero on error.
      */
-    int requestBackup(in String[] packages, IBackupObserver observer);
+    int requestBackup(in String[] packages, IBackupObserver observer, int flags);
 }
diff --git a/core/java/android/content/pm/PackageManager.java b/core/java/android/content/pm/PackageManager.java
index 04e649c..c3fe182 100644
--- a/core/java/android/content/pm/PackageManager.java
+++ b/core/java/android/content/pm/PackageManager.java
@@ -1360,6 +1360,14 @@
     public static final int MOVE_FAILED_DEVICE_ADMIN = -8;
 
     /**
+     * Error code that is passed to the {@link IPackageMoveObserver} if system does not allow
+     * non-system apps to be moved to internal storage.
+     *
+     * @hide
+     */
+    public static final int MOVE_FAILED_3RD_PARTY_NOT_ALLOWED_ON_INTERNAL = -9;
+
+    /**
      * Flag parameter for {@link #movePackage} to indicate that
      * the package should be moved to internal storage if its
      * been installed on external media.
diff --git a/core/java/android/content/pm/PackageManagerInternal.java b/core/java/android/content/pm/PackageManagerInternal.java
index bf3aa70..a1747c7 100644
--- a/core/java/android/content/pm/PackageManagerInternal.java
+++ b/core/java/android/content/pm/PackageManagerInternal.java
@@ -222,6 +222,27 @@
             int userId);
 
     /**
+     * Grants access to the package metadata for an ephemeral application.
+     * <p>
+     * When an ephemeral application explicitly tries to interact with a full
+     * install application [via an activity, service or provider that has been
+     * exposed using the {@code visibleToInstantApp} attribute], the normal
+     * application must be able to see metadata about the connecting ephemeral
+     * app. If the ephemeral application uses an implicit intent [ie action VIEW,
+     * category BROWSABLE], it remains hidden from the launched activity.
+     * <p>
+     * If the {@code sourceUid} is not for an ephemeral app or {@code targetUid}
+     * is not for a fully installed app, this method will be a no-op.
+     *
+     * @param userId the user
+     * @param intent the intent that triggered the grant
+     * @param targetAppId The app ID of the fully installed application
+     * @param ephemeralAppId The app ID of the ephemeral application
+     */
+    public abstract void grantEphemeralAccess(int userId, Intent intent,
+            int targetAppId, int ephemeralAppId);
+
+    /**
      * @return The SetupWizard package name.
      */
     public abstract String getSetupWizardPackageName();
diff --git a/core/java/android/net/NetworkKey.java b/core/java/android/net/NetworkKey.java
index ffbc401..1a128e0 100644
--- a/core/java/android/net/NetworkKey.java
+++ b/core/java/android/net/NetworkKey.java
@@ -17,6 +17,7 @@
 package android.net;
 
 import android.annotation.SystemApi;
+import android.net.wifi.ScanResult;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -52,6 +53,18 @@
     public final WifiKey wifiKey;
 
     /**
+     * Constructs a new NetworkKey for the given wifi {@link ScanResult}.
+     *
+     * @throws IllegalArgumentException if the given ScanResult is malformed
+     * @hide
+     */
+    public static NetworkKey createFromScanResult(ScanResult result) {
+        return new NetworkKey(
+                new WifiKey(
+                        '"' + result.wifiSsid.toString() + '"', result.BSSID));
+    }
+
+    /**
      * Construct a new {@link NetworkKey} for a Wi-Fi network.
      * @param wifiKey the {@link WifiKey} identifying this Wi-Fi network.
      */
diff --git a/core/java/android/os/FileUtils.java b/core/java/android/os/FileUtils.java
index 73c9462..7c015de 100644
--- a/core/java/android/os/FileUtils.java
+++ b/core/java/android/os/FileUtils.java
@@ -38,7 +38,6 @@
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
-import java.io.FileWriter;
 import java.io.FilenameFilter;
 import java.io.IOException;
 import java.io.InputStream;
@@ -334,12 +333,7 @@
      * @throws IOException
      */
     public static void stringToFile(String filename, String string) throws IOException {
-        FileWriter out = new FileWriter(filename);
-        try {
-            out.write(string);
-        } finally {
-            out.close();
-        }
+        bytesToFile(filename, string.getBytes(StandardCharsets.UTF_8));
     }
 
     /**
diff --git a/core/java/android/view/MenuInflater.java b/core/java/android/view/MenuInflater.java
index f3f3d40..7a5c65f 100644
--- a/core/java/android/view/MenuInflater.java
+++ b/core/java/android/view/MenuInflater.java
@@ -335,7 +335,7 @@
         private ActionProvider itemActionProvider;
 
         private CharSequence itemContentDescription;
-        private CharSequence itemTooltip;
+        private CharSequence itemTooltipText;
 
         private static final int defaultGroupId = NO_ID;
         private static final int defaultItemId = NO_ID;
@@ -429,7 +429,7 @@
 
             itemContentDescription =
                     a.getText(com.android.internal.R.styleable.MenuItem_contentDescription);
-            itemTooltip = a.getText(com.android.internal.R.styleable.MenuItem_tooltip);
+            itemTooltipText = a.getText(com.android.internal.R.styleable.MenuItem_tooltipText);
 
             a.recycle();
 
@@ -495,7 +495,7 @@
             }
 
             item.setContentDescription(itemContentDescription);
-            item.setTooltip(itemTooltip);
+            item.setTooltipText(itemTooltipText);
         }
 
         public MenuItem addItem() {
diff --git a/core/java/android/view/MenuItem.java b/core/java/android/view/MenuItem.java
index 5ced765..3f8d089 100644
--- a/core/java/android/view/MenuItem.java
+++ b/core/java/android/view/MenuItem.java
@@ -621,9 +621,9 @@
     /**
      * Change the tooltip text associated with this menu item.
      *
-     * @param tooltip The new tooltip text.
+     * @param tooltipText The new tooltip text.
      */
-    default MenuItem setTooltip(CharSequence tooltip) {
+    default MenuItem setTooltipText(CharSequence tooltipText) {
         return this;
     }
 
@@ -632,7 +632,7 @@
      *
      * @return The tooltip text.
      */
-    default CharSequence getTooltip() {
+    default CharSequence getTooltipText() {
         return null;
     }
 }
diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 37dfdb9..cbcec0e 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -3718,7 +3718,7 @@
          * Text to be displayed in a tooltip popup.
          */
         @Nullable
-        CharSequence mTooltip;
+        CharSequence mTooltipText;
 
         /**
          * View-relative position of the tooltip anchor point.
@@ -4761,8 +4761,8 @@
                         forceHasOverlappingRendering(a.getBoolean(attr, true));
                     }
                     break;
-                case R.styleable.View_tooltip:
-                    setTooltip(a.getText(attr));
+                case R.styleable.View_tooltipText:
+                    setTooltipText(a.getText(attr));
                     break;
                 case R.styleable.View_keyboardNavigationCluster:
                     if (a.peekValue(attr) != null) {
@@ -24638,10 +24638,10 @@
      * menu). </li>
      * <li>On hover, after a brief delay since the pointer has stopped moving </li>
      *
-     * @param tooltip the tooltip text, or null if no tooltip is required
+     * @param tooltipText the tooltip text, or null if no tooltip is required
      */
-    public final void setTooltip(@Nullable CharSequence tooltip) {
-        if (TextUtils.isEmpty(tooltip)) {
+    public final void setTooltipText(@Nullable CharSequence tooltipText) {
+        if (TextUtils.isEmpty(tooltipText)) {
             setFlags(0, TOOLTIP);
             hideTooltip();
             mTooltipInfo = null;
@@ -24652,21 +24652,42 @@
                 mTooltipInfo.mShowTooltipRunnable = this::showHoverTooltip;
                 mTooltipInfo.mHideTooltipRunnable = this::hideTooltip;
             }
-            mTooltipInfo.mTooltip = tooltip;
+            mTooltipInfo.mTooltipText = tooltipText;
             if (mTooltipInfo.mTooltipPopup != null && mTooltipInfo.mTooltipPopup.isShowing()) {
-                mTooltipInfo.mTooltipPopup.updateContent(mTooltipInfo.mTooltip);
+                mTooltipInfo.mTooltipPopup.updateContent(mTooltipInfo.mTooltipText);
             }
         }
     }
 
     /**
+     * To be removed once the support library has stopped using it.
+     *
+     * @deprecated use {@link #setTooltipText} instead
+     */
+    @Deprecated
+    public final void setTooltip(@Nullable CharSequence tooltipText) {
+        setTooltipText(tooltipText);
+    }
+
+    /**
      * Returns the view's tooltip text.
      *
      * @return the tooltip text
      */
     @Nullable
+    public final CharSequence getTooltipText() {
+        return mTooltipInfo != null ? mTooltipInfo.mTooltipText : null;
+    }
+
+    /**
+     * To be removed once the support library has stopped using it.
+     *
+     * @deprecated use {@link #getTooltipText} instead
+     */
+    @Deprecated
+    @Nullable
     public final CharSequence getTooltip() {
-        return mTooltipInfo != null ? mTooltipInfo.mTooltip : null;
+        return getTooltipText();
     }
 
     private boolean showTooltip(int x, int y, boolean fromLongClick) {
@@ -24676,7 +24697,7 @@
         if ((mViewFlags & ENABLED_MASK) != ENABLED) {
             return false;
         }
-        final CharSequence tooltipText = getTooltip();
+        final CharSequence tooltipText = getTooltipText();
         if (TextUtils.isEmpty(tooltipText)) {
             return false;
         }
diff --git a/core/java/android/widget/TextView.java b/core/java/android/widget/TextView.java
index b6693c7..08b18a4 100644
--- a/core/java/android/widget/TextView.java
+++ b/core/java/android/widget/TextView.java
@@ -3257,20 +3257,6 @@
     }
 
     /**
-     * Returns the font variation settings.
-     *
-     * @return the currently set font variation settings.  Returns null if no variation is
-     * specified.
-     *
-     * @see #setFontVariationSettings(String)
-     * @see Paint#setFontVariationSettings(String) Paint.setFontVariationSettings(String)
-     */
-    @Nullable
-    public String getFontVariationSettings() {
-        return mTextPaint.getFontVariationSettings();
-    }
-
-    /**
      * Sets the break strategy for breaking paragraphs into lines. The default value for
      * TextView is {@link Layout#BREAK_STRATEGY_HIGH_QUALITY}, and the default value for
      * EditText is {@link Layout#BREAK_STRATEGY_SIMPLE}, the latter to avoid the
@@ -3377,41 +3363,6 @@
 
 
     /**
-     * Sets TrueType or OpenType font variation settings. The settings string is constructed from
-     * multiple pairs of axis tag and style values. The axis tag must contain four ASCII characters
-     * and must be wrapped with single quotes (U+0027) or double quotes (U+0022). Axis strings that
-     * are longer or shorter than four characters, or contain characters outside of U+0020..U+007E
-     * are invalid. If a specified axis name is not defined in the font, the settings will be
-     * ignored.
-     *
-     * <pre>
-     *   textView.setFontVariationSettings("'wdth' 1.0");
-     *   textView.setFontVariationSettings("'AX  ' 1.8, 'FB  ' 2.0");
-     * </pre>
-     *
-     * @param fontVariationSettings font variation settings. You can pass null or empty string as
-     *                              no variation settings.
-     *
-     * @see #getFontVariationSettings()
-     * @see Paint#getFontVariationSettings() Paint.getFontVariationSettings()
-     */
-    public void setFontVariationSettings(@Nullable String fontVariationSettings) {
-        final String existingSettings = mTextPaint.getFontVariationSettings();
-        if (fontVariationSettings == existingSettings
-                || (fontVariationSettings != null
-                        && fontVariationSettings.equals(existingSettings))) {
-            return;
-        }
-        mTextPaint.setFontVariationSettings(fontVariationSettings);
-
-        if (mLayout != null) {
-            nullLayouts();
-            requestLayout();
-            invalidate();
-        }
-    }
-
-    /**
      * Sets the text color for all the states (normal, selected,
      * focused) to be this color.
      *
diff --git a/core/java/com/android/internal/view/menu/ActionMenuItem.java b/core/java/com/android/internal/view/menu/ActionMenuItem.java
index c8697dd..1fce0b7 100644
--- a/core/java/com/android/internal/view/menu/ActionMenuItem.java
+++ b/core/java/com/android/internal/view/menu/ActionMenuItem.java
@@ -48,7 +48,7 @@
     private MenuItem.OnMenuItemClickListener mClickListener;
 
     private CharSequence mContentDescription;
-    private CharSequence mTooltip;
+    private CharSequence mTooltipText;
 
     private static final int NO_ICON = 0;
 
@@ -290,13 +290,13 @@
     }
 
     @Override
-    public MenuItem setTooltip(CharSequence tooltip) {
-        mTooltip = tooltip;
+    public MenuItem setTooltipText(CharSequence tooltipText) {
+        mTooltipText = tooltipText;
         return this;
     }
 
     @Override
-    public CharSequence getTooltip() {
-        return mTooltip;
+    public CharSequence getTooltipText() {
+        return mTooltipText;
     }
 }
diff --git a/core/java/com/android/internal/view/menu/ActionMenuItemView.java b/core/java/com/android/internal/view/menu/ActionMenuItemView.java
index 4ee5993..92e1d80 100644
--- a/core/java/com/android/internal/view/menu/ActionMenuItemView.java
+++ b/core/java/com/android/internal/view/menu/ActionMenuItemView.java
@@ -193,12 +193,12 @@
             setContentDescription(contentDescription);
         }
 
-        final CharSequence tooltip = mItemData.getTooltip();
-        if (TextUtils.isEmpty(tooltip)) {
+        final CharSequence tooltipText = mItemData.getTooltipText();
+        if (TextUtils.isEmpty(tooltipText)) {
             // Use the uncondensed title for tooltip, but only if the title is not shown already.
-            setTooltip(visible ? null : mItemData.getTitle());
+            setTooltipText(visible ? null : mItemData.getTitle());
         } else {
-            setTooltip(tooltip);
+            setTooltipText(tooltipText);
         }
     }
 
diff --git a/core/java/com/android/internal/view/menu/IconMenuItemView.java b/core/java/com/android/internal/view/menu/IconMenuItemView.java
index f9ebdbc..6c8f330 100644
--- a/core/java/com/android/internal/view/menu/IconMenuItemView.java
+++ b/core/java/com/android/internal/view/menu/IconMenuItemView.java
@@ -113,7 +113,7 @@
             } else {
                 setContentDescription(contentDescription);
             }
-            setTooltip(mItemData.getTooltip());
+            setTooltipText(mItemData.getTooltipText());
         }
     }
 
diff --git a/core/java/com/android/internal/view/menu/ListMenuItemView.java b/core/java/com/android/internal/view/menu/ListMenuItemView.java
index 7c9f709..43005e6 100644
--- a/core/java/com/android/internal/view/menu/ListMenuItemView.java
+++ b/core/java/com/android/internal/view/menu/ListMenuItemView.java
@@ -115,7 +115,7 @@
         setEnabled(itemData.isEnabled());
         setSubMenuArrowVisible(itemData.hasSubMenu());
         setContentDescription(itemData.getContentDescription());
-        setTooltip(itemData.getTooltip());
+        setTooltipText(itemData.getTooltipText());
     }
 
     public void setForceShowIcon(boolean forceShow) {
diff --git a/core/java/com/android/internal/view/menu/MenuItemImpl.java b/core/java/com/android/internal/view/menu/MenuItemImpl.java
index cad0276..342943f 100644
--- a/core/java/com/android/internal/view/menu/MenuItemImpl.java
+++ b/core/java/com/android/internal/view/menu/MenuItemImpl.java
@@ -94,7 +94,7 @@
     private ContextMenuInfo mMenuInfo;
 
     private CharSequence mContentDescription;
-    private CharSequence mTooltip;
+    private CharSequence mTooltipText;
 
     private static String sLanguage;
     private static String sPrependShortcutLabel;
@@ -689,8 +689,8 @@
     }
 
     @Override
-    public MenuItem setTooltip(CharSequence tooltip) {
-        mTooltip = tooltip;
+    public MenuItem setTooltipText(CharSequence tooltipText) {
+        mTooltipText = tooltipText;
 
         mMenu.onItemsChanged(false);
 
@@ -698,7 +698,7 @@
     }
 
     @Override
-    public CharSequence getTooltip() {
-        return mTooltip;
+    public CharSequence getTooltipText() {
+        return mTooltipText;
     }
 }
diff --git a/core/java/com/android/internal/widget/FloatingToolbar.java b/core/java/com/android/internal/widget/FloatingToolbar.java
index 04e09a8..58e694a 100644
--- a/core/java/com/android/internal/widget/FloatingToolbar.java
+++ b/core/java/com/android/internal/widget/FloatingToolbar.java
@@ -1591,7 +1591,7 @@
                     } else {
                         menuButton.setContentDescription(contentDescription);
                     }
-                    menuButton.setTooltip(menuItem.getTooltip());
+                    menuButton.setTooltipText(menuItem.getTooltipText());
                     menuButton.setMinimumWidth(minimumWidth);
                 }
                 return menuButton;
@@ -1642,17 +1642,17 @@
             ((ImageButton) menuItemButton
                     .findViewById(R.id.floating_toolbar_menu_item_image_button))
                     .setImageDrawable(menuItem.getIcon());
-            final CharSequence tooltip = menuItem.getTooltip();
-            if (TextUtils.isEmpty(tooltip)) {
-                menuItemButton.setTooltip(menuItem.getTitle());
+            final CharSequence tooltipText = menuItem.getTooltipText();
+            if (TextUtils.isEmpty(tooltipText)) {
+                menuItemButton.setTooltipText(menuItem.getTitle());
             } else {
-                menuItemButton.setTooltip(tooltip);
+                menuItemButton.setTooltipText(tooltipText);
             }
         } else {
             menuItemButton = LayoutInflater.from(context)
                     .inflate(R.layout.floating_popup_menu_button, null);
             ((Button) menuItemButton).setText(menuItem.getTitle());
-            menuItemButton.setTooltip(menuItem.getTooltip());
+            menuItemButton.setTooltipText(menuItem.getTooltipText());
         }
         final CharSequence contentDescription = menuItem.getContentDescription();
         if (TextUtils.isEmpty(contentDescription)) {
diff --git a/core/java/com/android/internal/widget/ScrollingTabContainerView.java b/core/java/com/android/internal/widget/ScrollingTabContainerView.java
index 4466575..311bfac 100644
--- a/core/java/com/android/internal/widget/ScrollingTabContainerView.java
+++ b/core/java/com/android/internal/widget/ScrollingTabContainerView.java
@@ -471,7 +471,7 @@
                 if (mIconView != null) {
                     mIconView.setContentDescription(tab.getContentDescription());
                 }
-                setTooltip(hasText? null : tab.getContentDescription());
+                setTooltipText(hasText? null : tab.getContentDescription());
             }
         }
 
diff --git a/core/jni/Android.mk b/core/jni/Android.mk
index 6a9ed8e..0d3ccdc 100644
--- a/core/jni/Android.mk
+++ b/core/jni/Android.mk
@@ -118,7 +118,6 @@
     android/graphics/ColorFilter.cpp \
     android/graphics/DrawFilter.cpp \
     android/graphics/FontFamily.cpp \
-    android/graphics/FontUtils.cpp \
     android/graphics/CreateJavaOutputStreamAdaptor.cpp \
     android/graphics/GIFMovie.cpp \
     android/graphics/GraphicBuffer.cpp \
diff --git a/core/jni/android/graphics/FontFamily.cpp b/core/jni/android/graphics/FontFamily.cpp
index 685c93d..15e7165 100644
--- a/core/jni/android/graphics/FontFamily.cpp
+++ b/core/jni/android/graphics/FontFamily.cpp
@@ -30,7 +30,6 @@
 #include <android_runtime/android_util_AssetManager.h>
 #include <androidfw/AssetManager.h>
 #include "Utils.h"
-#include "FontUtils.h"
 
 #include <hwui/MinikinSkia.h>
 #include <hwui/Typeface.h>
@@ -40,54 +39,27 @@
 
 namespace android {
 
-struct NativeFamilyBuilder {
-    uint32_t langId;
-    int variant;
-    std::vector<minikin::Font> fonts;
-};
-
-static jlong FontFamily_initBuilder(JNIEnv* env, jobject clazz, jstring lang, jint variant) {
-    NativeFamilyBuilder* builder = new NativeFamilyBuilder();
-    if (lang != nullptr) {
-        ScopedUtfChars str(env, lang);
-        builder->langId = minikin::FontStyle::registerLanguageList(str.c_str());
-    } else {
-        builder->langId = minikin::FontStyle::registerLanguageList("");
+static jlong FontFamily_create(JNIEnv* env, jobject clazz, jstring lang, jint variant) {
+    if (lang == NULL) {
+        return (jlong)new minikin::FontFamily(variant);
     }
-    builder->variant = variant;
-    return reinterpret_cast<jlong>(builder);
+    ScopedUtfChars str(env, lang);
+    uint32_t langId = minikin::FontStyle::registerLanguageList(str.c_str());
+    return (jlong)new minikin::FontFamily(langId, variant);
 }
 
-static jlong FontFamily_create(jlong builderPtr) {
-    if (builderPtr == 0) {
-        return 0;
-    }
-    NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
-    minikin::FontFamily* family = new minikin::FontFamily(
-            builder->langId, builder->variant, std::move(builder->fonts));
-    delete builder;
-    return reinterpret_cast<jlong>(family);
-}
-
-static void FontFamily_unref(jlong familyPtr) {
+static void FontFamily_unref(JNIEnv* env, jobject clazz, jlong familyPtr) {
     minikin::FontFamily* fontFamily = reinterpret_cast<minikin::FontFamily*>(familyPtr);
     fontFamily->Unref();
 }
 
-static void addSkTypeface(jlong builderPtr, sk_sp<SkTypeface> face, const void* fontData,
-        size_t fontSize, int ttcIndex) {
+static jboolean addSkTypeface(minikin::FontFamily* family, sk_sp<SkTypeface> face,
+        const void* fontData, size_t fontSize, int ttcIndex) {
     minikin::MinikinFont* minikinFont =
             new MinikinFontSkia(std::move(face), fontData, fontSize, ttcIndex);
-    NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
-    int weight;
-    bool italic;
-    if (!minikin::FontFamily::analyzeStyle(minikinFont, &weight, &italic)) {
-        ALOGE("analyzeStyle failed. Using default style");
-        weight = 400;
-        italic = false;
-    }
-    builder->fonts.push_back(minikin::Font(minikinFont, minikin::FontStyle(weight / 100, italic)));
+    bool result = family->addFont(minikinFont);
     minikinFont->Unref();
+    return result;
 }
 
 static void release_global_ref(const void* /*data*/, void* context) {
@@ -113,7 +85,7 @@
     }
 }
 
-static jboolean FontFamily_addFont(JNIEnv* env, jobject clazz, jlong builderPtr, jobject bytebuf,
+static jboolean FontFamily_addFont(JNIEnv* env, jobject clazz, jlong familyPtr, jobject bytebuf,
         jint ttcIndex) {
     NPE_CHECK_RETURN_ZERO(env, bytebuf);
     const void* fontPtr = env->GetDirectBufferAddress(bytebuf);
@@ -140,11 +112,21 @@
         ALOGE("addFont failed to create font");
         return false;
     }
-    addSkTypeface(builderPtr, std::move(face), fontPtr, (size_t)fontSize, ttcIndex);
-    return true;
+    minikin::FontFamily* fontFamily = reinterpret_cast<minikin::FontFamily*>(familyPtr);
+    return addSkTypeface(fontFamily, std::move(face), fontPtr, (size_t)fontSize, ttcIndex);
 }
 
-static jboolean FontFamily_addFontWeightStyle(JNIEnv* env, jobject clazz, jlong builderPtr,
+static struct {
+    jmethodID mGet;
+    jmethodID mSize;
+} gListClassInfo;
+
+static struct {
+    jfieldID mTag;
+    jfieldID mStyleValue;
+} gAxisClassInfo;
+
+static jboolean FontFamily_addFontWeightStyle(JNIEnv* env, jobject clazz, jlong familyPtr,
         jobject font, jint ttcIndex, jobject listOfAxis, jint weight, jboolean isItalic) {
     NPE_CHECK_RETURN_ZERO(env, font);
 
@@ -152,22 +134,20 @@
     std::unique_ptr<SkFontMgr::FontParameters::Axis[]> skiaAxes;
     int skiaAxesLength = 0;
     if (listOfAxis) {
-        ListHelper list(env, listOfAxis);
-        jint listSize = list.size();
+        jint listSize = env->CallIntMethod(listOfAxis, gListClassInfo.mSize);
 
         skiaAxes.reset(new SkFontMgr::FontParameters::Axis[listSize]);
         skiaAxesLength = listSize;
         for (jint i = 0; i < listSize; ++i) {
-            jobject axisObject = list.get(i);
+            jobject axisObject = env->CallObjectMethod(listOfAxis, gListClassInfo.mGet, i);
             if (!axisObject) {
                 skiaAxes[i].fTag = 0;
                 skiaAxes[i].fStyleValue = 0;
                 continue;
             }
-            AxisHelper axis(env, axisObject);
 
-            jint tag = axis.getTag();
-            jfloat stylevalue = axis.getStyleValue();
+            jint tag = env->GetIntField(axisObject, gAxisClassInfo.mTag);
+            jfloat stylevalue = env->GetFloatField(axisObject, gAxisClassInfo.mStyleValue);
             skiaAxes[i].fTag = tag;
             skiaAxes[i].fStyleValue = SkFloatToScalar(stylevalue);
         }
@@ -198,11 +178,10 @@
         ALOGE("addFont failed to create font, invalid request");
         return false;
     }
+    minikin::FontFamily* fontFamily = reinterpret_cast<minikin::FontFamily*>(familyPtr);
     minikin::MinikinFont* minikinFont =
-            new MinikinFontSkia(std::move(face), fontPtr, fontSize, ttcIndex);
-    NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
-    builder->fonts.push_back(minikin::Font(minikinFont,
-            minikin::FontStyle(weight / 100, isItalic)));
+            new MinikinFontSkia(std::move(face), fontPtr, (size_t)fontSize, ttcIndex);
+    fontFamily->addFont(minikinFont, minikin::FontStyle(weight / 100, isItalic));
     minikinFont->Unref();
     return true;
 }
@@ -211,7 +190,7 @@
     delete static_cast<Asset*>(context);
 }
 
-static jboolean FontFamily_addFontFromAsset(JNIEnv* env, jobject, jlong builderPtr,
+static jboolean FontFamily_addFontFromAsset(JNIEnv* env, jobject, jlong familyPtr,
         jobject jassetMgr, jstring jpath) {
     NPE_CHECK_RETURN_ZERO(env, jassetMgr);
     NPE_CHECK_RETURN_ZERO(env, jpath);
@@ -243,16 +222,14 @@
         ALOGE("addFontFromAsset failed to create font %s", str.c_str());
         return false;
     }
-
-    addSkTypeface(builderPtr, std::move(face), buf, bufSize, 0 /* ttc index */);
-    return true;
+    minikin::FontFamily* fontFamily = reinterpret_cast<minikin::FontFamily*>(familyPtr);
+    return addSkTypeface(fontFamily, std::move(face), buf, bufSize, /* ttcIndex */ 0);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static const JNINativeMethod gFontFamilyMethods[] = {
-    { "nInitBuilder",          "(Ljava/lang/String;I)J", (void*)FontFamily_initBuilder },
-    { "nCreateFamily",         "(J)J", (void*)FontFamily_create },
+    { "nCreateFamily",         "(Ljava/lang/String;I)J", (void*)FontFamily_create },
     { "nUnrefFamily",          "(J)V", (void*)FontFamily_unref },
     { "nAddFont",              "(JLjava/nio/ByteBuffer;I)Z", (void*)FontFamily_addFont },
     { "nAddFontWeightStyle",   "(JLjava/nio/ByteBuffer;ILjava/util/List;IZ)Z",
@@ -266,7 +243,14 @@
     int err = RegisterMethodsOrDie(env, "android/graphics/FontFamily", gFontFamilyMethods,
             NELEM(gFontFamilyMethods));
 
-    init_FontUtils(env);
+    jclass listClass = FindClassOrDie(env, "java/util/List");
+    gListClassInfo.mGet = GetMethodIDOrDie(env, listClass, "get", "(I)Ljava/lang/Object;");
+    gListClassInfo.mSize = GetMethodIDOrDie(env, listClass, "size", "()I");
+
+    jclass axisClass = FindClassOrDie(env, "android/graphics/FontListParser$Axis");
+    gAxisClassInfo.mTag = GetFieldIDOrDie(env, axisClass, "tag", "I");
+    gAxisClassInfo.mStyleValue = GetFieldIDOrDie(env, axisClass, "styleValue", "F");
+
     return err;
 }
 
diff --git a/core/jni/android/graphics/FontUtils.cpp b/core/jni/android/graphics/FontUtils.cpp
deleted file mode 100644
index 11c2d29..0000000
--- a/core/jni/android/graphics/FontUtils.cpp
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "FontUtils.h"
-
-#include "JNIHelp.h"
-#include <core_jni_helpers.h>
-
-namespace android {
-namespace {
-
-static struct {
-    jmethodID mGet;
-    jmethodID mSize;
-} gListClassInfo;
-
-static struct {
-    jfieldID mTag;
-    jfieldID mStyleValue;
-} gAxisClassInfo;
-
-}  // namespace
-
-jint ListHelper::size() const {
-    return mEnv->CallIntMethod(mList, gListClassInfo.mSize);
-}
-
-jobject ListHelper::get(jint index) const {
-    return mEnv->CallObjectMethod(mList, gListClassInfo.mGet, index);
-}
-
-jint AxisHelper::getTag() const {
-    return mEnv->GetIntField(mAxis, gAxisClassInfo.mTag);
-}
-
-jfloat AxisHelper::getStyleValue() const {
-    return mEnv->GetFloatField(mAxis, gAxisClassInfo.mStyleValue);
-}
-
-void init_FontUtils(JNIEnv* env) {
-    jclass listClass = FindClassOrDie(env, "java/util/List");
-    gListClassInfo.mGet = GetMethodIDOrDie(env, listClass, "get", "(I)Ljava/lang/Object;");
-    gListClassInfo.mSize = GetMethodIDOrDie(env, listClass, "size", "()I");
-
-    jclass axisClass = FindClassOrDie(env, "android/graphics/FontListParser$Axis");
-    gAxisClassInfo.mTag = GetFieldIDOrDie(env, axisClass, "tag", "I");
-    gAxisClassInfo.mStyleValue = GetFieldIDOrDie(env, axisClass, "styleValue", "F");
-}
-
-}  // namespace android
diff --git a/core/jni/android/graphics/FontUtils.h b/core/jni/android/graphics/FontUtils.h
deleted file mode 100644
index 6fbd5e3..0000000
--- a/core/jni/android/graphics/FontUtils.h
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef _ANDROID_GRAPHICS_FONT_UTILS_H_
-#define _ANDROID_GRAPHICS_FONT_UTILS_H_
-
-#include <jni.h>
-
-namespace android {
-
-// Utility wrapper for java.util.List
-class ListHelper {
-public:
-  ListHelper(JNIEnv* env, jobject list) : mEnv(env), mList(list) {}
-
-  jint size() const;
-  jobject get(jint index) const;
-
-private:
-  JNIEnv* mEnv;
-  jobject mList;
-};
-
-// Utility wrapper for android.graphics.FontListParser$Axis
-class AxisHelper {
-public:
-  AxisHelper(JNIEnv* env, jobject axis) : mEnv(env), mAxis(axis) {}
-
-  jint getTag() const;
-  jfloat getStyleValue() const;
-
-private:
-  JNIEnv* mEnv;
-  jobject mAxis;
-};
-
-void init_FontUtils(JNIEnv* env);
-
-}; // namespace android
-
-#endif  // _ANDROID_GRAPHICS_FONT_UTILS_H_
diff --git a/core/jni/android/graphics/Typeface.cpp b/core/jni/android/graphics/Typeface.cpp
index 0a0fce3e..c920b8d 100644
--- a/core/jni/android/graphics/Typeface.cpp
+++ b/core/jni/android/graphics/Typeface.cpp
@@ -17,14 +17,12 @@
 #include "jni.h"
 #include "core_jni_helpers.h"
 
-#include "FontUtils.h"
 #include "GraphicsJNI.h"
 #include "ScopedPrimitiveArray.h"
 #include "SkTypeface.h"
 #include <android_runtime/android_util_AssetManager.h>
 #include <androidfw/AssetManager.h>
 #include <hwui/Typeface.h>
-#include <minikin/FontFamily.h>
 
 using namespace android;
 
@@ -42,23 +40,6 @@
     return reinterpret_cast<jlong>(face);
 }
 
-static jlong Typeface_createFromTypefaceWithVariation(JNIEnv* env, jobject, jlong familyHandle,
-        jobject listOfAxis) {
-    std::vector<minikin::FontVariation> variations;
-    ListHelper list(env, listOfAxis);
-    for (jint i = 0; i < list.size(); i++) {
-        jobject axisObject = list.get(i);
-        if (axisObject == nullptr) {
-            continue;
-        }
-        AxisHelper axis(env, axisObject);
-        variations.push_back(minikin::FontVariation(axis.getTag(), axis.getStyleValue()));
-    }
-    Typeface* baseTypeface = reinterpret_cast<Typeface*>(familyHandle);
-    Typeface* result = Typeface::createFromTypefaceWithVariation(baseTypeface, variations);
-    return reinterpret_cast<jlong>(result);
-}
-
 static jlong Typeface_createWeightAlias(JNIEnv* env, jobject, jlong familyHandle, jint weight) {
     Typeface* family = reinterpret_cast<Typeface*>(familyHandle);
     Typeface* face = Typeface::createWeightAlias(family, weight);
@@ -96,8 +77,6 @@
 
 static const JNINativeMethod gTypefaceMethods[] = {
     { "nativeCreateFromTypeface", "(JI)J", (void*)Typeface_createFromTypeface },
-    { "nativeCreateFromTypefaceWithVariation", "(JLjava/util/List;)J",
-            (void*)Typeface_createFromTypefaceWithVariation },
     { "nativeCreateWeightAlias",  "(JI)J", (void*)Typeface_createWeightAlias },
     { "nativeUnref",              "(J)V",  (void*)Typeface_unref },
     { "nativeGetStyle",           "(J)I",  (void*)Typeface_getStyle },
diff --git a/core/res/res/values/attrs.xml b/core/res/res/values/attrs.xml
index a5c1a94..a401314 100644
--- a/core/res/res/values/attrs.xml
+++ b/core/res/res/values/attrs.xml
@@ -2890,7 +2890,7 @@
         <attr name="forceHasOverlappingRendering" format="boolean" />
 
         <!-- Defines text displayed in a small popup window on hover or long press. -->
-        <attr name="tooltip" format="string" localization="suggested" />
+        <attr name="tooltipText" format="string" localization="suggested" />
 
         <!-- Whether this view is a root of a keyboard navigation cluster.
              See {@link android.view.View#setKeyboardNavigationCluster(boolean)}. -->
@@ -7029,7 +7029,7 @@
         <attr name="contentDescription" format="string" />
 
         <!-- The tooltip text associated with the item. -->
-        <attr name="tooltip" format="string" />
+        <attr name="tooltipText" format="string" />
 
     </declare-styleable>
 
diff --git a/core/res/res/values/public.xml b/core/res/res/values/public.xml
index 099fe08..664baa2 100644
--- a/core/res/res/values/public.xml
+++ b/core/res/res/values/public.xml
@@ -2764,7 +2764,7 @@
         <public name="fontStyle" />
         <public name="font" />
         <public name="fontWeight" />
-        <public name="tooltip" />
+        <public name="tooltipText" />
         <public name="autoSizeText" />
         <public name="autoSizeStepGranularity" />
         <public name="autoSizeStepSizeSet" />
diff --git a/core/res/res/values/styles.xml b/core/res/res/values/styles.xml
index 842b575..faf451b 100644
--- a/core/res/res/values/styles.xml
+++ b/core/res/res/values/styles.xml
@@ -1290,7 +1290,7 @@
     <style name="Widget.ActionButton.Overflow">
         <item name="src">@drawable/ic_menu_more</item>
         <item name="contentDescription">@string/action_menu_overflow_description</item>
-        <item name="tooltip">@string/action_menu_overflow_description</item>
+        <item name="tooltipText">@string/action_menu_overflow_description</item>
     </style>
 
     <style name="Widget.ActionButton.CloseMode">
diff --git a/core/res/res/values/styles_holo.xml b/core/res/res/values/styles_holo.xml
index 12b8164..dc32b26 100644
--- a/core/res/res/values/styles_holo.xml
+++ b/core/res/res/values/styles_holo.xml
@@ -660,7 +660,7 @@
         <item name="src">@drawable/ic_menu_moreoverflow_holo_dark</item>
         <item name="background">?attr/actionBarItemBackground</item>
         <item name="contentDescription">@string/action_menu_overflow_description</item>
-        <item name="tooltip">@string/action_menu_overflow_description</item>
+        <item name="tooltipText">@string/action_menu_overflow_description</item>
     </style>
 
     <style name="Widget.Holo.ActionButton.TextButton" parent="Widget.Holo.ButtonBar.Button" />
@@ -995,7 +995,7 @@
     <style name="Widget.Holo.Light.ActionButton.Overflow">
         <item name="src">@drawable/ic_menu_moreoverflow_holo_light</item>
         <item name="contentDescription">@string/action_menu_overflow_description</item>
-        <item name="tooltip">@string/action_menu_overflow_description</item>
+        <item name="tooltipText">@string/action_menu_overflow_description</item>
     </style>
 
     <style name="Widget.Holo.Light.ActionBar.TabView" parent="Widget.Holo.ActionBar.TabView" />
diff --git a/core/res/res/values/styles_material.xml b/core/res/res/values/styles_material.xml
index 709200e..0b326e9 100644
--- a/core/res/res/values/styles_material.xml
+++ b/core/res/res/values/styles_material.xml
@@ -944,7 +944,7 @@
         <item name="src">@drawable/ic_menu_moreoverflow_material</item>
         <item name="background">?attr/actionBarItemBackground</item>
         <item name="contentDescription">@string/action_menu_overflow_description</item>
-        <item name="tooltip">@string/action_menu_overflow_description</item>
+        <item name="tooltipText">@string/action_menu_overflow_description</item>
         <item name="minWidth">@dimen/action_button_min_width_overflow_material</item>
         <item name="minHeight">@dimen/action_button_min_height_material</item>
         <item name="paddingStart">@dimen/action_bar_overflow_padding_start_material</item>
diff --git a/core/tests/coretests/src/android/app/ApplicationPackageManagerTest.java b/core/tests/coretests/src/android/app/ApplicationPackageManagerTest.java
new file mode 100644
index 0000000..f60bf94
--- /dev/null
+++ b/core/tests/coretests/src/android/app/ApplicationPackageManagerTest.java
@@ -0,0 +1,242 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.app;
+
+import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.IPackageManager;
+import android.content.pm.PackageInfo;
+import android.os.storage.StorageManager;
+import android.os.storage.VolumeInfo;
+
+import junit.framework.TestCase;
+
+import org.mockito.Mockito;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import static android.os.storage.VolumeInfo.STATE_MOUNTED;
+import static android.os.storage.VolumeInfo.STATE_UNMOUNTED;
+
+public class ApplicationPackageManagerTest extends TestCase {
+    private static final String sInternalVolPath = "/data";
+    private static final String sAdoptedVolPath = "/mnt/expand/123";
+    private static final String sPublicVolPath = "/emulated";
+    private static final String sPrivateUnmountedVolPath = "/private";
+
+    private static final String sInternalVolUuid = null; //StorageManager.UUID_PRIVATE_INTERNAL
+    private static final String sAdoptedVolUuid = "adopted";
+    private static final String sPublicVolUuid = "emulated";
+    private static final String sPrivateUnmountedVolUuid = "private";
+
+    private static final VolumeInfo sInternalVol = new VolumeInfo("private",
+            VolumeInfo.TYPE_PRIVATE, null /*DiskInfo*/, null /*partGuid*/);
+
+    private static final VolumeInfo sAdoptedVol = new VolumeInfo("adopted",
+            VolumeInfo.TYPE_PRIVATE, null /*DiskInfo*/, null /*partGuid*/);
+
+    private static final VolumeInfo sPublicVol = new VolumeInfo("public",
+            VolumeInfo.TYPE_PUBLIC, null /*DiskInfo*/, null /*partGuid*/);
+
+    private static final VolumeInfo sPrivateUnmountedVol = new VolumeInfo("private2",
+            VolumeInfo.TYPE_PRIVATE, null /*DiskInfo*/, null /*partGuid*/);
+
+    private static final List<VolumeInfo> sVolumes = new ArrayList<>();
+
+    static {
+        sInternalVol.path = sInternalVolPath;
+        sInternalVol.state = STATE_MOUNTED;
+        sInternalVol.fsUuid = sInternalVolUuid;
+
+        sAdoptedVol.path = sAdoptedVolPath;
+        sAdoptedVol.state = STATE_MOUNTED;
+        sAdoptedVol.fsUuid = sAdoptedVolUuid;
+
+        sPublicVol.state = STATE_MOUNTED;
+        sPublicVol.path = sPublicVolPath;
+        sPublicVol.fsUuid = sPublicVolUuid;
+
+        sPrivateUnmountedVol.state = STATE_UNMOUNTED;
+        sPrivateUnmountedVol.path = sPrivateUnmountedVolPath;
+        sPrivateUnmountedVol.fsUuid = sPrivateUnmountedVolUuid;
+
+        sVolumes.add(sInternalVol);
+        sVolumes.add(sAdoptedVol);
+        sVolumes.add(sPublicVol);
+        sVolumes.add(sPrivateUnmountedVol);
+    }
+
+    private static final class MockedApplicationPackageManager extends ApplicationPackageManager {
+        private boolean mForceAllowOnExternal = false;
+        private boolean mAllow3rdPartyOnInternal = true;
+
+        public MockedApplicationPackageManager() {
+            super(null, null);
+        }
+
+        public void setForceAllowOnExternal(boolean forceAllowOnExternal) {
+            mForceAllowOnExternal = forceAllowOnExternal;
+        }
+
+        public void setAllow3rdPartyOnInternal(boolean allow3rdPartyOnInternal) {
+            mAllow3rdPartyOnInternal = allow3rdPartyOnInternal;
+        }
+
+        @Override
+        public boolean isForceAllowOnExternal(Context context) {
+            return mForceAllowOnExternal;
+        }
+
+        @Override
+        public boolean isAllow3rdPartyOnInternal(Context context) {
+            return mAllow3rdPartyOnInternal;
+        }
+    }
+
+    private StorageManager getMockedStorageManager() {
+        StorageManager storageManager = Mockito.mock(StorageManager.class);
+        Mockito.when(storageManager.getVolumes()).thenReturn(sVolumes);
+        Mockito.when(storageManager.findVolumeById(VolumeInfo.ID_PRIVATE_INTERNAL))
+                .thenReturn(sInternalVol);
+        Mockito.when(storageManager.findVolumeByUuid(sAdoptedVolUuid))
+                .thenReturn(sAdoptedVol);
+        Mockito.when(storageManager.findVolumeByUuid(sPublicVolUuid))
+                .thenReturn(sPublicVol);
+        Mockito.when(storageManager.findVolumeByUuid(sPrivateUnmountedVolUuid))
+                .thenReturn(sPrivateUnmountedVol);
+        return storageManager;
+    }
+
+    private void verifyReturnedVolumes(List<VolumeInfo> actualVols, VolumeInfo... exptectedVols) {
+        boolean failed = false;
+        if (actualVols.size() != exptectedVols.length) {
+            failed = true;
+        } else {
+            for (VolumeInfo vol : exptectedVols) {
+                if (!actualVols.contains(vol)) {
+                    failed = true;
+                    break;
+                }
+            }
+        }
+
+        if (failed) {
+            fail("Wrong volumes returned.\n Expected: " + Arrays.toString(exptectedVols)
+                    + "\n Actual: " + Arrays.toString(actualVols.toArray()));
+        }
+    }
+
+    public void testGetCandidateVolumes_systemApp() throws Exception {
+        ApplicationInfo sysAppInfo = new ApplicationInfo();
+        sysAppInfo.flags = ApplicationInfo.FLAG_SYSTEM;
+
+        StorageManager storageManager = getMockedStorageManager();
+        IPackageManager pm = Mockito.mock(IPackageManager.class);
+
+        MockedApplicationPackageManager appPkgMgr = new MockedApplicationPackageManager();
+
+        appPkgMgr.setAllow3rdPartyOnInternal(true);
+        appPkgMgr.setForceAllowOnExternal(true);
+        List<VolumeInfo> candidates =
+                appPkgMgr.getPackageCandidateVolumes(sysAppInfo, storageManager, pm);
+        verifyReturnedVolumes(candidates, sInternalVol);
+
+        appPkgMgr.setAllow3rdPartyOnInternal(true);
+        appPkgMgr.setForceAllowOnExternal(false);
+        candidates = appPkgMgr.getPackageCandidateVolumes(sysAppInfo, storageManager, pm);
+        verifyReturnedVolumes(candidates, sInternalVol);
+
+        appPkgMgr.setAllow3rdPartyOnInternal(false);
+        appPkgMgr.setForceAllowOnExternal(false);
+        candidates = appPkgMgr.getPackageCandidateVolumes(sysAppInfo, storageManager, pm);
+        verifyReturnedVolumes(candidates, sInternalVol);
+
+        appPkgMgr.setAllow3rdPartyOnInternal(false);
+        appPkgMgr.setForceAllowOnExternal(true);
+        candidates = appPkgMgr.getPackageCandidateVolumes(sysAppInfo, storageManager, pm);
+        verifyReturnedVolumes(candidates, sInternalVol);
+    }
+
+    public void testGetCandidateVolumes_3rdParty_internalOnly() throws Exception {
+        ApplicationInfo appInfo = new ApplicationInfo();
+        StorageManager storageManager = getMockedStorageManager();
+
+        IPackageManager pm = Mockito.mock(IPackageManager.class);
+        Mockito.when(pm.isPackageDeviceAdminOnAnyUser(Mockito.anyString())).thenReturn(false);
+
+        MockedApplicationPackageManager appPkgMgr = new MockedApplicationPackageManager();
+
+        // must allow 3rd party on internal, otherwise the app wouldn't have been installed before.
+        appPkgMgr.setAllow3rdPartyOnInternal(true);
+
+        // INSTALL_LOCATION_INTERNAL_ONLY AND INSTALL_LOCATION_UNSPECIFIED are treated the same.
+        int[] locations = {PackageInfo.INSTALL_LOCATION_INTERNAL_ONLY,
+                PackageInfo.INSTALL_LOCATION_UNSPECIFIED};
+
+        for (int location : locations) {
+            appInfo.installLocation = location;
+            appPkgMgr.setForceAllowOnExternal(true);
+            List<VolumeInfo> candidates = appPkgMgr.getPackageCandidateVolumes(
+                    appInfo, storageManager, pm);
+            verifyReturnedVolumes(candidates, sInternalVol, sAdoptedVol);
+
+            appPkgMgr.setForceAllowOnExternal(false);
+            candidates = appPkgMgr.getPackageCandidateVolumes(appInfo, storageManager, pm);
+            verifyReturnedVolumes(candidates, sInternalVol);
+        }
+    }
+
+    public void testGetCandidateVolumes_3rdParty_auto() throws Exception {
+        ApplicationInfo appInfo = new ApplicationInfo();
+        StorageManager storageManager = getMockedStorageManager();
+
+        IPackageManager pm = Mockito.mock(IPackageManager.class);
+
+        MockedApplicationPackageManager appPkgMgr = new MockedApplicationPackageManager();
+        appPkgMgr.setForceAllowOnExternal(true);
+
+        // INSTALL_LOCATION_AUTO AND INSTALL_LOCATION_PREFER_EXTERNAL are treated the same.
+        int[] locations = {PackageInfo.INSTALL_LOCATION_AUTO,
+                PackageInfo.INSTALL_LOCATION_PREFER_EXTERNAL};
+
+        for (int location : locations) {
+            appInfo.installLocation = location;
+            appInfo.flags = 0;
+
+            appInfo.volumeUuid = sInternalVolUuid;
+            Mockito.when(pm.isPackageDeviceAdminOnAnyUser(Mockito.anyString())).thenReturn(false);
+            appPkgMgr.setAllow3rdPartyOnInternal(true);
+            List<VolumeInfo> candidates = appPkgMgr.getPackageCandidateVolumes(
+                    appInfo, storageManager, pm);
+            verifyReturnedVolumes(candidates, sInternalVol, sAdoptedVol);
+
+            appInfo.volumeUuid = sInternalVolUuid;
+            appPkgMgr.setAllow3rdPartyOnInternal(true);
+            Mockito.when(pm.isPackageDeviceAdminOnAnyUser(Mockito.anyString())).thenReturn(true);
+            candidates = appPkgMgr.getPackageCandidateVolumes(appInfo, storageManager, pm);
+            verifyReturnedVolumes(candidates, sInternalVol);
+
+            appInfo.flags = ApplicationInfo.FLAG_EXTERNAL_STORAGE;
+            appInfo.volumeUuid = sAdoptedVolUuid;
+            appPkgMgr.setAllow3rdPartyOnInternal(false);
+            candidates = appPkgMgr.getPackageCandidateVolumes(appInfo, storageManager, pm);
+            verifyReturnedVolumes(candidates, sAdoptedVol);
+        }
+    }
+}
diff --git a/graphics/java/android/graphics/FontFamily.java b/graphics/java/android/graphics/FontFamily.java
index 2733c43f..e48bf79 100644
--- a/graphics/java/android/graphics/FontFamily.java
+++ b/graphics/java/android/graphics/FontFamily.java
@@ -18,7 +18,6 @@
 
 import android.content.res.AssetManager;
 import android.util.Log;
-import dalvik.annotation.optimization.CriticalNative;
 
 import java.io.FileInputStream;
 import java.io.IOException;
@@ -40,11 +39,11 @@
      */
     public long mNativePtr;
 
-    // Points native font family builder. Must be zero after freezing this family.
-    private long mBuilderPtr;
-
     public FontFamily() {
-        mBuilderPtr = nInitBuilder(null, 0);
+        mNativePtr = nCreateFamily(null, 0);
+        if (mNativePtr == 0) {
+            throw new IllegalStateException("error creating native FontFamily");
+        }
     }
 
     public FontFamily(String lang, String variant) {
@@ -54,15 +53,10 @@
         } else if ("elegant".equals(variant)) {
             varEnum = 2;
         }
-        mBuilderPtr = nInitBuilder(lang, varEnum);
-    }
-
-    public void freeze() {
-        if (mBuilderPtr == 0) {
-            throw new IllegalStateException("This FontFamily is already frozen");
+        mNativePtr = nCreateFamily(lang, varEnum);
+        if (mNativePtr == 0) {
+            throw new IllegalStateException("error creating native FontFamily");
         }
-        mNativePtr = nCreateFamily(mBuilderPtr);
-        mBuilderPtr = 0;
     }
 
     @Override
@@ -75,14 +69,11 @@
     }
 
     public boolean addFont(String path, int ttcIndex) {
-        if (mBuilderPtr == 0) {
-            throw new IllegalStateException("Unable to call addFont after freezing.");
-        }
         try (FileInputStream file = new FileInputStream(path)) {
             FileChannel fileChannel = file.getChannel();
             long fontSize = fileChannel.size();
             ByteBuffer fontBuffer = fileChannel.map(FileChannel.MapMode.READ_ONLY, 0, fontSize);
-            return nAddFont(mBuilderPtr, fontBuffer, ttcIndex);
+            return nAddFont(mNativePtr, fontBuffer, ttcIndex);
         } catch (IOException e) {
             Log.e(TAG, "Error mapping font file " + path);
             return false;
@@ -91,29 +82,19 @@
 
     public boolean addFontWeightStyle(ByteBuffer font, int ttcIndex, List<FontListParser.Axis> axes,
             int weight, boolean style) {
-        if (mBuilderPtr == 0) {
-            throw new IllegalStateException("Unable to call addFontWeightStyle after freezing.");
-        }
-        return nAddFontWeightStyle(mBuilderPtr, font, ttcIndex, axes, weight, style);
+        return nAddFontWeightStyle(mNativePtr, font, ttcIndex, axes, weight, style);
     }
 
     public boolean addFontFromAsset(AssetManager mgr, String path) {
-        if (mBuilderPtr == 0) {
-            throw new IllegalStateException("Unable to call addFontFromAsset after freezing.");
-        }
-        return nAddFontFromAsset(mBuilderPtr, mgr, path);
+        return nAddFontFromAsset(mNativePtr, mgr, path);
     }
 
-    private static native long nInitBuilder(String lang, int variant);
-
-    @CriticalNative
-    private static native long nCreateFamily(long mBuilderPtr);
-
-    @CriticalNative
+    private static native long nCreateFamily(String lang, int variant);
     private static native void nUnrefFamily(long nativePtr);
-    private static native boolean nAddFont(long builderPtr, ByteBuffer font, int ttcIndex);
-    private static native boolean nAddFontWeightStyle(long builderPtr, ByteBuffer font,
+    private static native boolean nAddFont(long nativeFamily, ByteBuffer font, int ttcIndex);
+    private static native boolean nAddFontWeightStyle(long nativeFamily, ByteBuffer font,
             int ttcIndex, List<FontListParser.Axis> listOfAxis,
             int weight, boolean isItalic);
-    private static native boolean nAddFontFromAsset(long builderPtr, AssetManager mgr, String path);
+    private static native boolean nAddFontFromAsset(long nativeFamily, AssetManager mgr,
+            String path);
 }
diff --git a/graphics/java/android/graphics/FontListParser.java b/graphics/java/android/graphics/FontListParser.java
index 5b53296..9490436 100644
--- a/graphics/java/android/graphics/FontListParser.java
+++ b/graphics/java/android/graphics/FontListParser.java
@@ -21,7 +21,6 @@
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 
-import android.annotation.Nullable;
 import com.android.internal.annotations.VisibleForTesting;
 
 import java.io.IOException;
@@ -105,12 +104,9 @@
     // Note that a well-formed variation contains a four-character tag and a float as styleValue,
     // with spacers in between. The tag is enclosd either by double quotes or single quotes.
     @VisibleForTesting
-    public static ArrayList<Axis> parseFontVariationSettings(@Nullable String settings) {
-        ArrayList<Axis> axisList = new ArrayList<>();
-        if (settings == null) {
-            return axisList;
-        }
+    public static Axis[] parseFontVariationSettings(String settings) {
         String[] settingList = settings.split(",");
+        ArrayList<Axis> axisList = new ArrayList<>();
         settingLoop:
         for (String setting : settingList) {
             int pos = 0;
@@ -154,7 +150,7 @@
                     tagString.charAt(3));
             axisList.add(new Axis(tag, styleValue));
         }
-        return axisList;
+        return axisList.toArray(new Axis[axisList.size()]);
     }
 
     @VisibleForTesting
diff --git a/graphics/java/android/graphics/Paint.java b/graphics/java/android/graphics/Paint.java
index 4ee0c34..7815ae1 100644
--- a/graphics/java/android/graphics/Paint.java
+++ b/graphics/java/android/graphics/Paint.java
@@ -71,7 +71,6 @@
 
     private LocaleList  mLocales;
     private String      mFontFeatureSettings;
-    private String      mFontVariationSettings;
 
     private static final Object sCacheLock = new Object();
 
@@ -1495,37 +1494,6 @@
     }
 
     /**
-     * Returns the font variation settings.
-     *
-     * @return the paint's currently set font variation settings. Default is null.
-     *
-     * @see #setFontVariationSettings(String)
-     */
-    public String getFontVariationSettings() {
-        return mFontVariationSettings;
-    }
-
-    /**
-     * Set font variation settings.
-     *
-     * @param settings font variation settings, e.g. "'wdth' 300, 'wght' 1.8"
-     *
-     * @see #getFontVariationSettings()
-     *
-     * @param settings the font variation settings. You can pass null or empty string as no
-     *                 variation settings.
-     */
-    public void setFontVariationSettings(String settings) {
-        settings = TextUtils.nullIfEmpty(settings);
-        if (settings == mFontVariationSettings
-                || (settings != null && settings.equals(mFontVariationSettings))) {
-            return;
-        }
-        mFontVariationSettings = settings;
-        setTypeface(Typeface.createFromTypefaceWithVariation(mTypeface, settings));
-    }
-
-    /**
      * Get the current value of hyphen edit.
      *
      * @return the current hyphen edit value
diff --git a/graphics/java/android/graphics/Typeface.java b/graphics/java/android/graphics/Typeface.java
index 166ef1b..2886f0d 100644
--- a/graphics/java/android/graphics/Typeface.java
+++ b/graphics/java/android/graphics/Typeface.java
@@ -21,7 +21,6 @@
 import android.util.LongSparseArray;
 import android.util.LruCache;
 import android.util.SparseArray;
-import android.graphics.FontListParser;
 
 import org.xmlpull.v1.XmlPullParserException;
 
@@ -172,15 +171,6 @@
         return typeface;
     }
 
-    /** @hide */
-    public static Typeface createFromTypefaceWithVariation(Typeface family,
-            String fontVariationSettings) {
-        final long ni = family == null ? 0 : family.native_instance;
-        ArrayList<FontListParser.Axis> axes =
-                FontListParser.parseFontVariationSettings(fontVariationSettings);
-        return new Typeface(nativeCreateFromTypefaceWithVariation(ni, axes));
-    }
-
     /**
      * Returns one of the default typeface objects, based on the specified style
      *
@@ -206,7 +196,6 @@
 
                 FontFamily fontFamily = new FontFamily();
                 if (fontFamily.addFontFromAsset(mgr, path)) {
-                    fontFamily.freeze();
                     FontFamily[] families = { fontFamily };
                     typeface = createFromFamiliesWithDefault(families);
                     sDynamicTypefaceCache.put(key, typeface);
@@ -256,7 +245,6 @@
         if (sFallbackFonts != null) {
             FontFamily fontFamily = new FontFamily();
             if (fontFamily.addFont(path, 0 /* ttcIndex */)) {
-                fontFamily.freeze();
                 FontFamily[] families = { fontFamily };
                 return createFromFamiliesWithDefault(families);
             }
@@ -327,7 +315,6 @@
                 Log.e(TAG, "Error creating font " + font.fontName + "#" + font.ttcIndex);
             }
         }
-        fontFamily.freeze();
         return fontFamily;
     }
 
@@ -453,8 +440,6 @@
     }
 
     private static native long nativeCreateFromTypeface(long native_instance, int style);
-    private static native long nativeCreateFromTypefaceWithVariation(
-            long native_instance, List<FontListParser.Axis> axes);
     private static native long nativeCreateWeightAlias(long native_instance, int weight);
     private static native void nativeUnref(long native_instance);
     private static native int  nativeGetStyle(long native_instance);
diff --git a/graphics/tests/graphicstests/src/android/graphics/VariationParserTest.java b/graphics/tests/graphicstests/src/android/graphics/VariationParserTest.java
index 23de416..d046c11 100644
--- a/graphics/tests/graphicstests/src/android/graphics/VariationParserTest.java
+++ b/graphics/tests/graphicstests/src/android/graphics/VariationParserTest.java
@@ -17,7 +17,6 @@
 package android.graphics;
 
 import android.test.suitebuilder.annotation.SmallTest;
-import java.util.List;
 import junit.framework.TestCase;
 
 
@@ -26,92 +25,92 @@
     @SmallTest
     public void testParseFontVariationSetting() {
         int tag = FontListParser.makeTag('w', 'd', 't', 'h');
-        List<FontListParser.Axis> axes = FontListParser.parseFontVariationSettings("'wdth' 1");
-        assertEquals(tag, axes.get(0).tag);
-        assertEquals(1.0f, axes.get(0).styleValue);
+        FontListParser.Axis[] axis = FontListParser.parseFontVariationSettings("'wdth' 1");
+        assertEquals(tag, axis[0].tag);
+        assertEquals(1.0f, axis[0].styleValue);
 
-        axes = FontListParser.parseFontVariationSettings("\"wdth\" 100");
-        assertEquals(tag, axes.get(0).tag);
-        assertEquals(100.0f, axes.get(0).styleValue);
+        axis = FontListParser.parseFontVariationSettings("\"wdth\" 100");
+        assertEquals(tag, axis[0].tag);
+        assertEquals(100.0f, axis[0].styleValue);
 
-        axes = FontListParser.parseFontVariationSettings("   'wdth' 100");
-        assertEquals(tag, axes.get(0).tag);
-        assertEquals(100.0f, axes.get(0).styleValue);
+        axis = FontListParser.parseFontVariationSettings("   'wdth' 100");
+        assertEquals(tag, axis[0].tag);
+        assertEquals(100.0f, axis[0].styleValue);
 
-        axes = FontListParser.parseFontVariationSettings("\t'wdth' 0.5");
-        assertEquals(tag, axes.get(0).tag);
-        assertEquals(0.5f, axes.get(0).styleValue);
+        axis = FontListParser.parseFontVariationSettings("\t'wdth' 0.5");
+        assertEquals(tag, axis[0].tag);
+        assertEquals(0.5f, axis[0].styleValue);
 
         tag = FontListParser.makeTag('A', 'X', ' ', ' ');
-        axes = FontListParser.parseFontVariationSettings("'AX  ' 1");
-        assertEquals(tag, axes.get(0).tag);
-        assertEquals(1.0f, axes.get(0).styleValue);
+        axis = FontListParser.parseFontVariationSettings("'AX  ' 1");
+        assertEquals(tag, axis[0].tag);
+        assertEquals(1.0f, axis[0].styleValue);
 
-        axes = FontListParser.parseFontVariationSettings("'AX  '\t1");
-        assertEquals(tag, axes.get(0).tag);
-        assertEquals(1.0f, axes.get(0).styleValue);
+        axis = FontListParser.parseFontVariationSettings("'AX  '\t1");
+        assertEquals(tag, axis[0].tag);
+        assertEquals(1.0f, axis[0].styleValue);
 
-        axes = FontListParser.parseFontVariationSettings("'AX  '\n1");
-        assertEquals(tag, axes.get(0).tag);
-        assertEquals(1.0f, axes.get(0).styleValue);
+        axis = FontListParser.parseFontVariationSettings("'AX  '\n1");
+        assertEquals(tag, axis[0].tag);
+        assertEquals(1.0f, axis[0].styleValue);
 
-        axes = FontListParser.parseFontVariationSettings("'AX  '\r1");
-        assertEquals(tag, axes.get(0).tag);
-        assertEquals(1.0f, axes.get(0).styleValue);
+        axis = FontListParser.parseFontVariationSettings("'AX  '\r1");
+        assertEquals(tag, axis[0].tag);
+        assertEquals(1.0f, axis[0].styleValue);
 
-        axes = FontListParser.parseFontVariationSettings("'AX  '\r\t\n 1");
-        assertEquals(tag, axes.get(0).tag);
-        assertEquals(1.0f, axes.get(0).styleValue);
+        axis = FontListParser.parseFontVariationSettings("'AX  '\r\t\n 1");
+        assertEquals(tag, axis[0].tag);
+        assertEquals(1.0f, axis[0].styleValue);
 
         // Test for invalid input
-        axes = FontListParser.parseFontVariationSettings("");
-        assertEquals(0, axes.size());
-        axes = FontListParser.parseFontVariationSettings("invalid_form");
-        assertEquals(0, axes.size());
+        axis = FontListParser.parseFontVariationSettings("");
+        assertEquals(0, axis.length);
+        axis = FontListParser.parseFontVariationSettings("invalid_form");
+        assertEquals(0, axis.length);
 
         // Test with invalid tag
-        axes = FontListParser.parseFontVariationSettings("'' 1");
-        assertEquals(0, axes.size());
-        axes = FontListParser.parseFontVariationSettings("'invalid' 1");
-        assertEquals(0, axes.size());
+        axis = FontListParser.parseFontVariationSettings("'' 1");
+        assertEquals(0, axis.length);
+        axis = FontListParser.parseFontVariationSettings("'invalid' 1");
+        assertEquals(0, axis.length);
 
         // Test with invalid styleValue
-        axes = FontListParser.parseFontVariationSettings("'wdth' ");
-        assertEquals(0, axes.size());
-        axes = FontListParser.parseFontVariationSettings("'wdth' x");
-        assertEquals(0, axes.size());
-        axes = FontListParser.parseFontVariationSettings("'wdth' \t");
-        assertEquals(0, axes.size());
-        axes = FontListParser.parseFontVariationSettings("'wdth' \n\r");
-        assertEquals(0, axes.size());
+        axis = FontListParser.parseFontVariationSettings("'wdth' ");
+        assertEquals(0, axis.length);
+        axis = FontListParser.parseFontVariationSettings("'wdth' x");
+        assertEquals(0, axis.length);
+        axis = FontListParser.parseFontVariationSettings("'wdth' \t");
+        assertEquals(0, axis.length);
+        axis = FontListParser.parseFontVariationSettings("'wdth' \n\r");
+        assertEquals(0, axis.length);
     }
 
     @SmallTest
     public void testParseFontVariationStyleSettings() {
-        List<FontListParser.Axis> axes =
+        FontListParser.Axis[] axis =
                 FontListParser.parseFontVariationSettings("'wdth' 10,'AX  '\r1");
         int tag1 = FontListParser.makeTag('w', 'd', 't', 'h');
         int tag2 = FontListParser.makeTag('A', 'X', ' ', ' ');
-        assertEquals(tag1, axes.get(0).tag);
-        assertEquals(10.0f, axes.get(0).styleValue);
-        assertEquals(tag2, axes.get(1).tag);
-        assertEquals(1.0f, axes.get(1).styleValue);
+        assertEquals(tag1, axis[0].tag);
+        assertEquals(10.0f, axis[0].styleValue);
+        assertEquals(tag2, axis[1].tag);
+        assertEquals(1.0f, axis[1].styleValue);
 
         // Test only spacers are allowed before tag
-        axes = FontListParser.parseFontVariationSettings("     'wdth' 10,ab'wdth' 1");
+        axis = FontListParser.parseFontVariationSettings("     'wdth' 10,ab'wdth' 1");
         tag1 = FontListParser.makeTag('w', 'd', 't', 'h');
-        assertEquals(tag1, axes.get(0).tag);
-        assertEquals(10.0f, axes.get(0).styleValue);
-        assertEquals(1, axes.size());
+        assertEquals(tag1, axis[0].tag);
+        assertEquals(10.0f, axis[0].styleValue);
+        assertEquals(1, axis.length);
     }
 
     @SmallTest
     public void testInvalidTagCharacters() {
-        List<FontListParser.Axis> axes =
+        FontListParser.Axis[] axis =
                 FontListParser.parseFontVariationSettings("'\u0000\u0000\u0000\u0000' 10");
-        assertEquals(0, axes.size());
-        axes = FontListParser.parseFontVariationSettings("'\u3042\u3044\u3046\u3048' 10");
-        assertEquals(0, axes.size());
+        assertEquals(0, axis.length);
+        axis = FontListParser.parseFontVariationSettings("'\u3042\u3044\u3046\u3048' 10");
+        assertEquals(0, axis.length);
     }
 
     @SmallTest
diff --git a/tools/aapt2/util/StringPiece.h b/libs/androidfw/include/androidfw/StringPiece.h
similarity index 66%
rename from tools/aapt2/util/StringPiece.h
rename to libs/androidfw/include/androidfw/StringPiece.h
index 5144b1f..c9effd1 100644
--- a/tools/aapt2/util/StringPiece.h
+++ b/libs/androidfw/include/androidfw/StringPiece.h
@@ -14,26 +14,24 @@
  * limitations under the License.
  */
 
-#ifndef AAPT_STRING_PIECE_H
-#define AAPT_STRING_PIECE_H
+#ifndef ANDROIDFW_STRING_PIECE_H
+#define ANDROIDFW_STRING_PIECE_H
 
 #include <ostream>
 #include <string>
 
 #include "utils/JenkinsHash.h"
-#include "utils/String8.h"
 #include "utils/Unicode.h"
 
-namespace aapt {
+namespace android {
 
-/**
- * Read only wrapper around basic C strings.
- * Prevents excessive copying.
- *
- * WARNING: When creating from std::basic_string<>, moving the original
- * std::basic_string<> will invalidate the data held in a BasicStringPiece<>.
- * BasicStringPiece<> should only be used transitively.
- */
+// Read only wrapper around basic C strings. Prevents excessive copying.
+// StringPiece does not own the data it is wrapping. The lifetime of the underlying
+// data must outlive this StringPiece.
+//
+// WARNING: When creating from std::basic_string<>, moving the original
+// std::basic_string<> will invalidate the data held in a BasicStringPiece<>.
+// BasicStringPiece<> should only be used transitively.
 template <typename TChar>
 class BasicStringPiece {
  public:
@@ -53,15 +51,14 @@
   BasicStringPiece<TChar>& assign(const TChar* str, size_t len);
 
   BasicStringPiece<TChar> substr(size_t start, size_t len = npos) const;
-  BasicStringPiece<TChar> substr(
-      BasicStringPiece<TChar>::const_iterator begin,
-      BasicStringPiece<TChar>::const_iterator end) const;
+  BasicStringPiece<TChar> substr(BasicStringPiece<TChar>::const_iterator begin,
+                                 BasicStringPiece<TChar>::const_iterator end) const;
 
   const TChar* data() const;
   size_t length() const;
   size_t size() const;
   bool empty() const;
-  std::basic_string<TChar> ToString() const;
+  std::basic_string<TChar> to_string() const;
 
   bool contains(const BasicStringPiece<TChar>& rhs) const;
   int compare(const BasicStringPiece<TChar>& rhs) const;
@@ -89,17 +86,14 @@
 constexpr const size_t BasicStringPiece<TChar>::npos;
 
 template <typename TChar>
-inline BasicStringPiece<TChar>::BasicStringPiece()
-    : data_(nullptr), length_(0) {}
+inline BasicStringPiece<TChar>::BasicStringPiece() : data_(nullptr), length_(0) {}
 
 template <typename TChar>
-inline BasicStringPiece<TChar>::BasicStringPiece(
-    const BasicStringPiece<TChar>& str)
+inline BasicStringPiece<TChar>::BasicStringPiece(const BasicStringPiece<TChar>& str)
     : data_(str.data_), length_(str.length_) {}
 
 template <typename TChar>
-inline BasicStringPiece<TChar>::BasicStringPiece(
-    const std::basic_string<TChar>& str)
+inline BasicStringPiece<TChar>::BasicStringPiece(const std::basic_string<TChar>& str)
     : data_(str.data()), length_(str.length()) {}
 
 template <>
@@ -123,16 +117,14 @@
 }
 
 template <typename TChar>
-inline BasicStringPiece<TChar>& BasicStringPiece<TChar>::assign(
-    const TChar* str, size_t len) {
+inline BasicStringPiece<TChar>& BasicStringPiece<TChar>::assign(const TChar* str, size_t len) {
   data_ = str;
   length_ = len;
   return *this;
 }
 
 template <typename TChar>
-inline BasicStringPiece<TChar> BasicStringPiece<TChar>::substr(
-    size_t start, size_t len) const {
+inline BasicStringPiece<TChar> BasicStringPiece<TChar>::substr(size_t start, size_t len) const {
   if (len == npos) {
     len = length_ - start;
   }
@@ -171,13 +163,12 @@
 }
 
 template <typename TChar>
-inline std::basic_string<TChar> BasicStringPiece<TChar>::ToString() const {
+inline std::basic_string<TChar> BasicStringPiece<TChar>::to_string() const {
   return std::basic_string<TChar>(data_, length_);
 }
 
 template <>
-inline bool BasicStringPiece<char>::contains(
-    const BasicStringPiece<char>& rhs) const {
+inline bool BasicStringPiece<char>::contains(const BasicStringPiece<char>& rhs) const {
   if (!data_ || !rhs.data_) {
     return false;
   }
@@ -188,8 +179,7 @@
 }
 
 template <>
-inline int BasicStringPiece<char>::compare(
-    const BasicStringPiece<char>& rhs) const {
+inline int BasicStringPiece<char>::compare(const BasicStringPiece<char>& rhs) const {
   const char nullStr = '\0';
   const char* b1 = data_ != nullptr ? data_ : &nullStr;
   const char* e1 = b1 + length_;
@@ -205,15 +195,21 @@
   return static_cast<int>(length_ - rhs.length_);
 }
 
-inline ::std::ostream& operator<<(::std::ostream& out,
-                                  const BasicStringPiece<char16_t>& str) {
-  android::String8 utf8(str.data(), str.size());
-  return out.write(utf8.string(), utf8.size());
+inline ::std::ostream& operator<<(::std::ostream& out, const BasicStringPiece<char16_t>& str) {
+  const ssize_t result_len = utf16_to_utf8_length(str.data(), str.size());
+  if (result_len < 0) {
+    // Empty string.
+    return out;
+  }
+
+  std::string result;
+  result.resize(static_cast<size_t>(result_len));
+  utf16_to_utf8(str.data(), str.length(), &*result.begin(), static_cast<size_t>(result_len) + 1);
+  return out << result;
 }
 
 template <>
-inline bool BasicStringPiece<char16_t>::contains(
-    const BasicStringPiece<char16_t>& rhs) const {
+inline bool BasicStringPiece<char16_t>::contains(const BasicStringPiece<char16_t>& rhs) const {
   if (!data_ || !rhs.data_) {
     return false;
   }
@@ -224,8 +220,7 @@
 }
 
 template <>
-inline int BasicStringPiece<char16_t>::compare(
-    const BasicStringPiece<char16_t>& rhs) const {
+inline int BasicStringPiece<char16_t>::compare(const BasicStringPiece<char16_t>& rhs) const {
   const char16_t nullStr = u'\0';
   const char16_t* b1 = data_ != nullptr ? data_ : &nullStr;
   const char16_t* b2 = rhs.data_ != nullptr ? rhs.data_ : &nullStr;
@@ -233,66 +228,52 @@
 }
 
 template <typename TChar>
-inline bool BasicStringPiece<TChar>::operator<(
-    const BasicStringPiece<TChar>& rhs) const {
+inline bool BasicStringPiece<TChar>::operator<(const BasicStringPiece<TChar>& rhs) const {
   return compare(rhs) < 0;
 }
 
 template <typename TChar>
-inline bool BasicStringPiece<TChar>::operator>(
-    const BasicStringPiece<TChar>& rhs) const {
+inline bool BasicStringPiece<TChar>::operator>(const BasicStringPiece<TChar>& rhs) const {
   return compare(rhs) > 0;
 }
 
 template <typename TChar>
-inline bool BasicStringPiece<TChar>::operator==(
-    const BasicStringPiece<TChar>& rhs) const {
+inline bool BasicStringPiece<TChar>::operator==(const BasicStringPiece<TChar>& rhs) const {
   return compare(rhs) == 0;
 }
 
 template <typename TChar>
-inline bool BasicStringPiece<TChar>::operator!=(
-    const BasicStringPiece<TChar>& rhs) const {
+inline bool BasicStringPiece<TChar>::operator!=(const BasicStringPiece<TChar>& rhs) const {
   return compare(rhs) != 0;
 }
 
 template <typename TChar>
-inline typename BasicStringPiece<TChar>::const_iterator
-BasicStringPiece<TChar>::begin() const {
+inline typename BasicStringPiece<TChar>::const_iterator BasicStringPiece<TChar>::begin() const {
   return data_;
 }
 
 template <typename TChar>
-inline typename BasicStringPiece<TChar>::const_iterator
-BasicStringPiece<TChar>::end() const {
+inline typename BasicStringPiece<TChar>::const_iterator BasicStringPiece<TChar>::end() const {
   return data_ + length_;
 }
 
-inline ::std::ostream& operator<<(::std::ostream& out,
-                                  const BasicStringPiece<char>& str) {
+inline ::std::ostream& operator<<(::std::ostream& out, const BasicStringPiece<char>& str) {
   return out.write(str.data(), str.size());
 }
 
-}  // namespace aapt
-
-inline ::std::ostream& operator<<(::std::ostream& out,
-                                  const std::u16string& str) {
-  android::String8 utf8(str.data(), str.size());
-  return out.write(utf8.string(), utf8.size());
-}
+}  // namespace android
 
 namespace std {
 
 template <typename TChar>
-struct hash<aapt::BasicStringPiece<TChar>> {
-  size_t operator()(const aapt::BasicStringPiece<TChar>& str) const {
+struct hash<android::BasicStringPiece<TChar>> {
+  size_t operator()(const android::BasicStringPiece<TChar>& str) const {
     uint32_t hashCode = android::JenkinsHashMixBytes(
-        0, reinterpret_cast<const uint8_t*>(str.data()),
-        sizeof(TChar) * str.size());
+        0, reinterpret_cast<const uint8_t*>(str.data()), sizeof(TChar) * str.size());
     return static_cast<size_t>(hashCode);
   }
 };
 
 }  // namespace std
 
-#endif  // AAPT_STRING_PIECE_H
+#endif  // ANDROIDFW_STRING_PIECE_H
diff --git a/libs/androidfw/tests/Android.mk b/libs/androidfw/tests/Android.mk
index 6754cd8..650f813 100644
--- a/libs/androidfw/tests/Android.mk
+++ b/libs/androidfw/tests/Android.mk
@@ -34,6 +34,7 @@
     LoadedArsc_test.cpp \
     ResTable_test.cpp \
     Split_test.cpp \
+    StringPiece_test.cpp \
     TestHelpers.cpp \
     TestMain.cpp \
     Theme_test.cpp \
diff --git a/tools/aapt2/util/StringPiece_test.cpp b/libs/androidfw/tests/StringPiece_test.cpp
similarity index 96%
rename from tools/aapt2/util/StringPiece_test.cpp
rename to libs/androidfw/tests/StringPiece_test.cpp
index 048961d..316a5c1 100644
--- a/tools/aapt2/util/StringPiece_test.cpp
+++ b/libs/androidfw/tests/StringPiece_test.cpp
@@ -14,15 +14,15 @@
  * limitations under the License.
  */
 
-#include "util/StringPiece.h"
+#include "androidfw/StringPiece.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
-#include "test/Test.h"
+#include "TestHelpers.h"
 
-namespace aapt {
+namespace android {
 
 TEST(StringPieceTest, CompareNonNullTerminatedPiece) {
   StringPiece a("hello world", 5);
@@ -92,4 +92,4 @@
   EXPECT_FALSE(text16.contains(long_needle16));
 }
 
-}  // namespace aapt
+}  // namespace android
diff --git a/libs/hwui/hwui/MinikinSkia.cpp b/libs/hwui/hwui/MinikinSkia.cpp
index 6a00379..956f66e 100644
--- a/libs/hwui/hwui/MinikinSkia.cpp
+++ b/libs/hwui/hwui/MinikinSkia.cpp
@@ -17,8 +17,7 @@
 #include "MinikinSkia.h"
 
 #include <log/log.h>
-#include <SkFontDescriptor.h>
-#include <SkFontMgr.h>
+
 #include <SkPaint.h>
 #include <SkTypeface.h>
 
@@ -87,28 +86,6 @@
     return mTtcIndex;
 }
 
-minikin::MinikinFont* MinikinFontSkia::createFontWithVariation(
-        const std::vector<minikin::FontVariation>& variations) const {
-    SkFontMgr::FontParameters params;
-
-    int ttcIndex;
-    SkStreamAsset* stream = mTypeface->openStream(&ttcIndex);
-    LOG_ALWAYS_FATAL_IF(stream == nullptr, "openStream failed");
-
-    params.setCollectionIndex(ttcIndex);
-    std::vector<SkFontMgr::FontParameters::Axis> skAxes;
-    skAxes.resize(variations.size());
-    for (size_t i = 0; i < variations.size(); i++) {
-        skAxes[i].fTag = variations[i].axisTag;
-        skAxes[i].fStyleValue = SkFloatToScalar(variations[i].value);
-    }
-    params.setAxes(skAxes.data(), skAxes.size());
-    sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
-    sk_sp<SkTypeface> face(fm->createFromStream(stream, params));
-
-    return new MinikinFontSkia(std::move(face), mFontData, mFontSize, ttcIndex);
-}
-
 uint32_t MinikinFontSkia::packPaintFlags(const SkPaint* paint) {
     uint32_t flags = paint->getFlags();
     SkPaint::Hinting hinting = paint->getHinting();
diff --git a/libs/hwui/hwui/MinikinSkia.h b/libs/hwui/hwui/MinikinSkia.h
index 249b0cb..3ee916c 100644
--- a/libs/hwui/hwui/MinikinSkia.h
+++ b/libs/hwui/hwui/MinikinSkia.h
@@ -44,8 +44,6 @@
     const void* GetFontData() const;
     size_t GetFontSize() const;
     int GetFontIndex() const;
-    minikin::MinikinFont* createFontWithVariation(
-            const std::vector<minikin::FontVariation>&) const;
 
     static uint32_t packPaintFlags(const SkPaint* paint);
     static void unpackPaintFlags(SkPaint* paint, uint32_t paintFlags);
diff --git a/libs/hwui/hwui/Typeface.cpp b/libs/hwui/hwui/Typeface.cpp
index b69b0cb..ca43156 100644
--- a/libs/hwui/hwui/Typeface.cpp
+++ b/libs/hwui/hwui/Typeface.cpp
@@ -62,7 +62,7 @@
 Typeface* Typeface::createFromTypeface(Typeface* src, SkTypeface::Style style) {
     Typeface* resolvedFace = Typeface::resolveDefault(src);
     Typeface* result = new Typeface;
-    if (result != nullptr) {
+    if (result != 0) {
         result->fFontCollection = resolvedFace->fFontCollection;
         result->fFontCollection->Ref();
         result->fSkiaStyle = style;
@@ -72,30 +72,10 @@
     return result;
 }
 
-Typeface* Typeface::createFromTypefaceWithVariation(Typeface* src,
-        const std::vector<minikin::FontVariation>& variations) {
-    Typeface* resolvedFace = Typeface::resolveDefault(src);
-    Typeface* result = new Typeface();
-    if (result != nullptr) {
-        result->fFontCollection =
-                resolvedFace->fFontCollection->createCollectionWithVariation(variations);
-        if (result->fFontCollection == nullptr) {
-            // None of passed axes are supported by this collection.
-            // So we will reuse the same collection with incrementing reference count.
-            result->fFontCollection = resolvedFace->fFontCollection;
-            result->fFontCollection->Ref();
-        }
-        result->fSkiaStyle = resolvedFace->fSkiaStyle;
-        result->fBaseWeight = resolvedFace->fBaseWeight;
-        resolveStyle(result);
-    }
-    return result;
-}
-
 Typeface* Typeface::createWeightAlias(Typeface* src, int weight) {
     Typeface* resolvedFace = Typeface::resolveDefault(src);
     Typeface* result = new Typeface;
-    if (result != nullptr) {
+    if (result != 0) {
         result->fFontCollection = resolvedFace->fFontCollection;
         result->fFontCollection->Ref();
         result->fSkiaStyle = resolvedFace->fSkiaStyle;
@@ -150,9 +130,9 @@
     sk_sp<SkTypeface> typeface = SkTypeface::MakeFromStream(fontData.release());
     LOG_ALWAYS_FATAL_IF(typeface == nullptr, "Failed to make typeface from %s", kRobotoFont);
 
+    minikin::FontFamily* family = new minikin::FontFamily();
     minikin::MinikinFont* font = new MinikinFontSkia(std::move(typeface), data, st.st_size, 0);
-    minikin::FontFamily* family = new minikin::FontFamily(
-                 std::vector<minikin::Font>({ minikin::Font(font, minikin::FontStyle()) }));
+    family->addFont(font);
     font->Unref();
 
     std::vector<minikin::FontFamily*> typefaces = { family };
diff --git a/libs/hwui/hwui/Typeface.h b/libs/hwui/hwui/Typeface.h
index 4392ebc..1be630c 100644
--- a/libs/hwui/hwui/Typeface.h
+++ b/libs/hwui/hwui/Typeface.h
@@ -43,9 +43,6 @@
 
     static Typeface* createFromTypeface(Typeface* src, SkTypeface::Style style);
 
-    static Typeface* createFromTypefaceWithVariation(Typeface* src,
-            const std::vector<minikin::FontVariation>& variations);
-
     static Typeface* createWeightAlias(Typeface* src, int baseweight);
 
     static Typeface* createFromFamilies(const std::vector<minikin::FontFamily*>& families);
diff --git a/packages/SettingsLib/src/com/android/settingslib/Utils.java b/packages/SettingsLib/src/com/android/settingslib/Utils.java
index 6179244..816591d 100644
--- a/packages/SettingsLib/src/com/android/settingslib/Utils.java
+++ b/packages/SettingsLib/src/com/android/settingslib/Utils.java
@@ -14,7 +14,9 @@
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.drawable.Drawable;
+import android.graphics.drawable.LayerDrawable;
 import android.net.ConnectivityManager;
+import android.net.ScoredNetwork;
 import android.os.BatteryManager;
 import android.os.UserManager;
 import android.print.PrintManager;
@@ -29,6 +31,14 @@
     private static String sServicesSystemSharedLibPackageName;
     private static String sSharedSystemSharedLibPackageName;
 
+    static final int[] WIFI_PIE_FOR_BADGING = {
+          com.android.internal.R.drawable.ic_signal_wifi_badged_0_bars,
+          com.android.internal.R.drawable.ic_signal_wifi_badged_1_bar,
+          com.android.internal.R.drawable.ic_signal_wifi_badged_2_bars,
+          com.android.internal.R.drawable.ic_signal_wifi_badged_3_bars,
+          com.android.internal.R.drawable.ic_signal_wifi_badged_4_bars
+    };
+
     /**
      * Return string resource that best describes combination of tethering
      * options available on this device.
@@ -233,4 +243,41 @@
                 com.android.internal.R.string.config_deviceProvisioningPackage);
         return deviceProvisioningPackage != null && deviceProvisioningPackage.equals(packageName);
     }
+
+    /**
+     * Returns a badged Wifi icon drawable.
+     *
+     * <p>The first layer contains the Wifi pie and the second layer contains the badge. Callers
+     * should set the drawable to the appropriate size and tint color.
+     *
+     * @param context The caller's context (must have access to internal resources)
+     * @param level The number of bars to show (0-4)
+     * @param badge The badge enum {@see android.net.ScoredNetwork}
+     *
+     * @throws IllegalArgumentException if an invalid badge enum is given
+     *
+     * @deprecated TODO(sghuman): Finalize the form of this method and then move it to a new
+     *         location.
+     */
+    public static LayerDrawable getBadgedWifiIcon(Context context, int level, int badge) {
+        return new LayerDrawable(
+                new Drawable[] {
+                        context.getDrawable(WIFI_PIE_FOR_BADGING[level]),
+                        context.getDrawable(getWifiBadgeResource(badge))
+                });
+    }
+
+    private static int getWifiBadgeResource(int badge) {
+        switch (badge) {
+            case ScoredNetwork.BADGING_SD:
+                return com.android.internal.R.drawable.ic_signal_wifi_badged_sd;
+            case ScoredNetwork.BADGING_HD:
+                return com.android.internal.R.drawable.ic_signal_wifi_badged_hd;
+            case ScoredNetwork.BADGING_4K:
+                return com.android.internal.R.drawable.ic_signal_wifi_badged_4k;
+            default:
+                throw new IllegalArgumentException(
+                    "No badge resource found for badge value: " + badge);
+        }
+    }
 }
diff --git a/packages/SettingsLib/src/com/android/settingslib/drawer/TileUtils.java b/packages/SettingsLib/src/com/android/settingslib/drawer/TileUtils.java
index b327be0..6e10aab 100644
--- a/packages/SettingsLib/src/com/android/settingslib/drawer/TileUtils.java
+++ b/packages/SettingsLib/src/com/android/settingslib/drawer/TileUtils.java
@@ -21,6 +21,7 @@
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.content.res.Resources;
@@ -105,6 +106,12 @@
     private static final String EXTRA_CATEGORY_KEY = "com.android.settings.category";
 
     /**
+     * The key used to get the package name of the icon resource for the preference.
+     */
+    private static final String EXTRA_PREFERENCE_ICON_PACKAGE =
+        "com.android.settings.icon_package";
+
+    /**
      * Name of the meta-data item that should be set in the AndroidManifest.xml
      * to specify the key that should be used for the preference.
      */
@@ -342,6 +349,7 @@
             ActivityInfo activityInfo, ApplicationInfo applicationInfo, PackageManager pm) {
         if (applicationInfo.isSystemApp()) {
             int icon = 0;
+            Pair<String, Integer> iconFromUri = null;
             CharSequence title = null;
             String summary = null;
             String keyHint = null;
@@ -358,10 +366,10 @@
 
                 if (res != null && metaData != null) {
                     if (metaData.containsKey(META_DATA_PREFERENCE_ICON_URI)) {
-                        icon = getIconFromUri(context,
+                        iconFromUri = getIconFromUri(context, activityInfo.packageName,
                                 metaData.getString(META_DATA_PREFERENCE_ICON_URI), providerMap);
                     }
-                    if ((icon == 0) && metaData.containsKey(META_DATA_PREFERENCE_ICON)) {
+                    if (iconFromUri == null && metaData.containsKey(META_DATA_PREFERENCE_ICON)) {
                         icon = metaData.getInt(META_DATA_PREFERENCE_ICON);
                     }
                     if (metaData.containsKey(META_DATA_PREFERENCE_TITLE)) {
@@ -401,12 +409,18 @@
             if (TextUtils.isEmpty(title)) {
                 title = activityInfo.loadLabel(pm).toString();
             }
-            if (icon == 0) {
-                icon = activityInfo.icon;
+
+            // Set the icon
+            if (iconFromUri != null) {
+                tile.icon = Icon.createWithResource(iconFromUri.first, iconFromUri.second);
+            } else {
+                if (icon == 0) {
+                    icon = activityInfo.icon;
+                }
+                tile.icon = Icon.createWithResource(activityInfo.packageName, icon);
             }
 
-            // Set icon, title and summary for the preference
-            tile.icon = Icon.createWithResource(activityInfo.packageName, icon);
+            // Set title and summary for the preference
             tile.title = title;
             tile.summary = summary;
             // Replace the intent with this specific activity
@@ -422,16 +436,33 @@
     }
 
     /**
-     * Gets the icon resource id from content provider.
+     * Gets the icon package name and resource id from content provider.
      * @param Context context
+     * @param packageName package name of the target activity
      * @param uriString URI for the content provider
      * @param providerMap Maps URI authorities to providers
-     * @return Resource id if returned by the content provider, otherwise 0
+     * @return package name and resource id of the icon specified
      */
-    public static int getIconFromUri(Context context, String uriString,
-            Map<String, IContentProvider> providerMap) {
+    public static Pair<String, Integer> getIconFromUri(Context context, String packageName,
+            String uriString, Map<String, IContentProvider> providerMap) {
         Bundle bundle = getBundleFromUri(context, uriString, providerMap);
-        return (bundle != null) ? bundle.getInt(META_DATA_PREFERENCE_ICON, 0) : 0;
+        if (bundle == null) {
+            return null;
+        }
+        String iconPackageName = bundle.getString(EXTRA_PREFERENCE_ICON_PACKAGE);
+        if (TextUtils.isEmpty(iconPackageName)) {
+            return null;
+        }
+        int resId = bundle.getInt(META_DATA_PREFERENCE_ICON, 0);
+        if (resId == 0) {
+            return null;
+        }
+        // Icon can either come from the target package or from the Settings app.
+        if (iconPackageName.equals(packageName)
+                || iconPackageName.equals(context.getPackageName())) {
+            return Pair.create(iconPackageName, bundle.getInt(META_DATA_PREFERENCE_ICON, 0));
+        }
+        return null;
     }
 
     /**
diff --git a/packages/SettingsLib/src/com/android/settingslib/wifi/AccessPoint.java b/packages/SettingsLib/src/com/android/settingslib/wifi/AccessPoint.java
index e7450fa..06ea445 100644
--- a/packages/SettingsLib/src/com/android/settingslib/wifi/AccessPoint.java
+++ b/packages/SettingsLib/src/com/android/settingslib/wifi/AccessPoint.java
@@ -27,12 +27,15 @@
 import android.net.NetworkInfo;
 import android.net.NetworkInfo.DetailedState;
 import android.net.NetworkInfo.State;
+import android.net.NetworkKey;
+import android.net.ScoredNetwork;
 import android.net.wifi.IWifiManager;
 import android.net.wifi.ScanResult;
 import android.net.wifi.WifiConfiguration;
 import android.net.wifi.WifiConfiguration.KeyMgmt;
 import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
+import android.net.wifi.WifiNetworkScoreCache;
 import android.os.Bundle;
 import android.os.RemoteException;
 import android.os.ServiceManager;
@@ -48,6 +51,7 @@
 import com.android.settingslib.R;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Iterator;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -132,6 +136,9 @@
 
     private Object mTag;
 
+    private int mRankingScore = Integer.MIN_VALUE;
+    private int mBadge = ScoredNetwork.BADGING_NONE;
+
     // used to co-relate internal vs returned accesspoint.
     int mId;
 
@@ -205,6 +212,8 @@
         this.mScanResultCache.clear();
         this.mScanResultCache.putAll(that.mScanResultCache);
         this.mId = that.mId;
+        this.mBadge = that.mBadge;
+        this.mRankingScore = that.mRankingScore;
     }
 
     @Override
@@ -213,6 +222,11 @@
         if (isActive() && !other.isActive()) return -1;
         if (!isActive() && other.isActive()) return 1;
 
+        // Higher scores go before lower scores
+        if (mRankingScore != other.mRankingScore) {
+            return (mRankingScore > other.mRankingScore) ? -1 : 1;
+        }
+
         // Reachable one goes before unreachable one.
         if (mRssi != Integer.MAX_VALUE && other.mRssi == Integer.MAX_VALUE) return -1;
         if (mRssi == Integer.MAX_VALUE && other.mRssi != Integer.MAX_VALUE) return 1;
@@ -268,9 +282,38 @@
         if (security != SECURITY_NONE) {
             builder.append(',').append(securityToString(security, pskType));
         }
+        builder.append(",rankingScore=").append(mRankingScore);
+        builder.append(",badge=").append(mBadge);
+
         return builder.append(')').toString();
     }
 
+    /**
+     * Updates the AccessPoint rankingScore and badge, returning true if the data has changed.
+     *
+     * @param scoreCache The score cache to use to retrieve scores.
+     */
+    boolean updateScores(WifiNetworkScoreCache scoreCache) {
+        int oldBadge = mBadge;
+        int oldRankingScore = mRankingScore;
+        mBadge = ScoredNetwork.BADGING_NONE;
+        mRankingScore = Integer.MIN_VALUE;
+
+        for (ScanResult result : mScanResultCache.values()) {
+            ScoredNetwork score = scoreCache.getScoredNetwork(result);
+            if (score == null) {
+                continue;
+            }
+
+            if (score.hasRankingScore()) {
+                mRankingScore = Math.max(mRankingScore, score.calculateRankingScore(result.level));
+            }
+            mBadge = Math.max(mBadge, score.calculateBadge(result.level));
+        }
+
+        return (oldBadge != mBadge || oldRankingScore != mRankingScore);
+    }
+
     private void evictOldScanResults() {
         long nowMs = SystemClock.elapsedRealtime();
         for (Iterator<ScanResult> iter = mScanResultCache.values().iterator(); iter.hasNext(); ) {
@@ -555,6 +598,8 @@
             visibility.append(" rssi=").append(mInfo.getRssi());
             visibility.append(" ");
             visibility.append(" score=").append(mInfo.score);
+            visibility.append(" rankingScore=").append(getRankingScore());
+            visibility.append(" badge=").append(getBadge());
             visibility.append(String.format(" tx=%.1f,", mInfo.txSuccessRate));
             visibility.append(String.format("%.1f,", mInfo.txRetriesRate));
             visibility.append(String.format("%.1f ", mInfo.txBadRate));
@@ -820,6 +865,14 @@
         mRssi = rssi;
     }
 
+    int getRankingScore() {
+        return mRankingScore;
+    }
+
+    int getBadge() {
+        return mBadge;
+    }
+
     public static String getSummary(Context context, String ssid, DetailedState state,
             boolean isEphemeral, String passpointProvider) {
         if (state == DetailedState.CONNECTED && ssid == null) {
diff --git a/packages/SettingsLib/src/com/android/settingslib/wifi/AccessPointPreference.java b/packages/SettingsLib/src/com/android/settingslib/wifi/AccessPointPreference.java
index a77b2ba..8ebea61 100644
--- a/packages/SettingsLib/src/com/android/settingslib/wifi/AccessPointPreference.java
+++ b/packages/SettingsLib/src/com/android/settingslib/wifi/AccessPointPreference.java
@@ -21,7 +21,9 @@
 import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.drawable.Drawable;
+import android.graphics.drawable.LayerDrawable;
 import android.graphics.drawable.StateListDrawable;
+import android.net.ScoredNetwork;
 import android.net.wifi.WifiConfiguration;
 import android.os.Looper;
 import android.os.UserHandle;
@@ -33,6 +35,7 @@
 import android.widget.ImageView;
 import android.widget.TextView;
 import com.android.settingslib.R;
+import com.android.settingslib.Utils;
 
 public class AccessPointPreference extends Preference {
 
@@ -60,6 +63,9 @@
     private int mLevel;
     private CharSequence mContentDescription;
     private int mDefaultIconResId;
+    private int mIconWidth;
+    private int mIconHeight;
+    private int mWifiBadge = ScoredNetwork.BADGING_NONE;
 
     static final int[] WIFI_CONNECTION_STRENGTH = {
             R.string.accessibility_wifi_one_bar,
@@ -89,6 +95,8 @@
 
         mWifiSld = (StateListDrawable) context.getTheme()
                 .obtainStyledAttributes(wifi_signal_attributes).getDrawable(0);
+        // Save icon width and height to use for creating a badged icon
+        setIconWidthAndHeight();
 
         TypedArray frictionSld;
         try {
@@ -118,6 +126,8 @@
 
         mWifiSld = (StateListDrawable) context.getTheme()
                 .obtainStyledAttributes(wifi_signal_attributes).getDrawable(0);
+        // Save icon width and height to use for creating a badged icon
+        setIconWidthAndHeight();
 
         TypedArray frictionSld;
         try {
@@ -133,6 +143,13 @@
                 .getDimensionPixelSize(R.dimen.wifi_preference_badge_padding);
     }
 
+    private void setIconWidthAndHeight() {
+        // TODO(sghuman): Refactor this defined widths and heights into a dimension resource and
+        // reference directly.
+        mIconWidth = mWifiSld.getIntrinsicWidth();
+        mIconHeight = mWifiSld.getIntrinsicHeight();
+    }
+
     public AccessPoint getAccessPoint() {
         return mAccessPoint;
     }
@@ -167,6 +184,16 @@
         if (level == -1) {
             safeSetDefaultIcon();
         } else {
+           if (mWifiBadge != ScoredNetwork.BADGING_NONE) {
+                // TODO(sghuman): Refactor this to reuse drawable to save memory and add to a
+                // special subclass of AccessPointPreference
+                LayerDrawable drawable = Utils.getBadgedWifiIcon(context, level, mWifiBadge);
+                drawable.setLayerSize(0, mIconWidth, mIconHeight);
+                drawable.setLayerSize(1, mIconWidth, mIconHeight);
+                drawable.setTint(Utils.getColorAccent(getContext()));
+                setIcon(drawable);
+                return;
+            }
             if (getIcon() == null) {
                 // To avoid a drawing race condition, we first set the state (SECURE/NONE) and then
                 // set the icon (drawable) to that state's drawable.
@@ -238,11 +265,14 @@
 
         final Context context = getContext();
         int level = mAccessPoint.getLevel();
-        if (level != mLevel) {
+        int wifiBadge = mAccessPoint.getBadge();
+        if (level != mLevel || wifiBadge != mWifiBadge) {
             mLevel = level;
+            mWifiBadge = wifiBadge;
             updateIcon(mLevel, context);
             notifyChanged();
         }
+
         updateBadge(context);
 
         setSummary(mForSavedNetworks ? mAccessPoint.getSavedNetworkSummary()
diff --git a/packages/SettingsLib/src/com/android/settingslib/wifi/WifiTracker.java b/packages/SettingsLib/src/com/android/settingslib/wifi/WifiTracker.java
index 77a45b3..799f388 100644
--- a/packages/SettingsLib/src/com/android/settingslib/wifi/WifiTracker.java
+++ b/packages/SettingsLib/src/com/android/settingslib/wifi/WifiTracker.java
@@ -24,15 +24,22 @@
 import android.net.NetworkCapabilities;
 import android.net.NetworkInfo;
 import android.net.NetworkInfo.DetailedState;
+import android.net.NetworkKey;
 import android.net.NetworkRequest;
+import android.net.NetworkScoreManager;
+import android.net.ScoredNetwork;
 import android.net.wifi.ScanResult;
 import android.net.wifi.WifiConfiguration;
 import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
+import android.net.wifi.WifiNetworkScoreCache;
+import android.net.wifi.WifiNetworkScoreCache.CacheListener;
 import android.os.ConditionVariable;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
+import android.support.annotation.WorkerThread;
+import android.util.ArraySet;
 import android.util.Log;
 import android.util.SparseArray;
 import android.util.SparseIntArray;
@@ -49,14 +56,18 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 /**
  * Tracks saved or available wifi networks and their state.
  */
 public class WifiTracker {
+    // TODO(sghuman): Document remaining methods with @UiThread and @WorkerThread where possible.
+    // TODO(sghuman): Refactor to avoid calling certain methods on the UiThread.
+
     private static final String TAG = "WifiTracker";
-    private static final boolean DBG = false;
+    private static final boolean DBG = Log.isLoggable(TAG, Log.DEBUG);
 
     /** verbose logging flag. this flag is set thru developer debugging options
      * and used so as to assist with in-the-field WiFi connectivity debugging  */
@@ -122,6 +133,10 @@
     private NetworkInfo mLastNetworkInfo;
     private WifiInfo mLastInfo;
 
+    private final NetworkScoreManager mNetworkScoreManager;
+    private final WifiNetworkScoreCache mScoreCache;
+    private final Set<NetworkKey> mRequestedScores = new ArraySet<>();
+
     @VisibleForTesting
     Scanner mScanner;
 
@@ -144,14 +159,16 @@
             boolean includeSaved, boolean includeScans, boolean includePasspoints) {
         this(context, wifiListener, workerLooper, includeSaved, includeScans, includePasspoints,
                 context.getSystemService(WifiManager.class),
-                context.getSystemService(ConnectivityManager.class), Looper.myLooper());
+                context.getSystemService(ConnectivityManager.class),
+                context.getSystemService(NetworkScoreManager.class), Looper.myLooper()
+        );
     }
 
     @VisibleForTesting
     WifiTracker(Context context, WifiListener wifiListener, Looper workerLooper,
             boolean includeSaved, boolean includeScans, boolean includePasspoints,
             WifiManager wifiManager, ConnectivityManager connectivityManager,
-            Looper currentLooper) {
+            NetworkScoreManager networkScoreManager, Looper currentLooper) {
         if (!includeSaved && !includeScans) {
             throw new IllegalArgumentException("Must include either saved or scans");
         }
@@ -186,6 +203,18 @@
                 .clearCapabilities()
                 .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
                 .build();
+
+        mNetworkScoreManager = networkScoreManager;
+
+        mScoreCache = new WifiNetworkScoreCache(context, new CacheListener(mWorkHandler) {
+            @Override
+            public void networkCacheUpdated(List<ScoredNetwork> networks) {
+                if (Log.isLoggable(TAG, Log.VERBOSE)) {
+                    Log.v(TAG, "Score cache was updated with networks: " + networks);
+                }
+                Message.obtain(mWorkHandler, WorkHandler.MSG_UPDATE_NETWORK_SCORES).sendToTarget();
+            }
+        });
     }
 
     /**
@@ -216,6 +245,8 @@
 
     /**
      * Resume scanning for wifi networks after it has been paused.
+     *
+     * <p>The score cache should be registered before this method is invoked.
      */
     public void resumeScanning() {
         if (mScanner == null) {
@@ -230,11 +261,20 @@
     }
 
     /**
-     * Start tracking wifi networks.
-     * Registers listeners and starts scanning for wifi networks. If this is not called
+     * Start tracking wifi networks and scores.
+     *
+     * <p>Registers listeners and starts scanning for wifi networks. If this is not called
      * then forceUpdate() must be called to populate getAccessPoints().
      */
     public void startTracking() {
+        mWorkHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                registerScoreCache();
+            }
+        });
+
+
         resumeScanning();
         if (!mRegistered) {
             mContext.registerReceiver(mReceiver, mFilter);
@@ -245,9 +285,28 @@
         }
     }
 
+    @WorkerThread
+    private void registerScoreCache() {
+        mNetworkScoreManager.registerNetworkScoreCache(
+                NetworkKey.TYPE_WIFI,
+                mScoreCache,
+                NetworkScoreManager.CACHE_FILTER_SCAN_RESULTS);
+    }
+
+    private void requestScoresForNetworkKeys(Collection<NetworkKey> keys) {
+        if (keys.isEmpty()) return;
+
+        if (DBG) {
+            Log.d(TAG, "Requesting scores for Network Keys: " + keys);
+        }
+        mNetworkScoreManager.requestScores(keys.toArray(new NetworkKey[keys.size()]));
+        mRequestedScores.addAll(keys);
+    }
+
     /**
-     * Stop tracking wifi networks.
-     * Unregisters all listeners and stops scanning for wifi networks. This should always
+     * Stop tracking wifi networks and scores.
+     *
+     * <p>Unregisters all listeners and stops scanning for wifi networks. This should always
      * be called when done with a WifiTracker (if startTracking was called) to ensure
      * proper cleanup.
      */
@@ -255,11 +314,26 @@
         if (mRegistered) {
             mWorkHandler.removeMessages(WorkHandler.MSG_UPDATE_ACCESS_POINTS);
             mWorkHandler.removeMessages(WorkHandler.MSG_UPDATE_NETWORK_INFO);
+            mWorkHandler.removeMessages(WorkHandler.MSG_UPDATE_NETWORK_SCORES);
             mContext.unregisterReceiver(mReceiver);
             mConnectivityManager.unregisterNetworkCallback(mNetworkCallback);
             mRegistered = false;
         }
         pauseScanning();
+
+        mWorkHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                unregisterAndClearScoreCache();
+            }
+        });
+    }
+
+    @WorkerThread
+    private void unregisterAndClearScoreCache() {
+        mRequestedScores.clear();
+        mNetworkScoreManager.unregisterNetworkScoreCache(NetworkKey.TYPE_WIFI, mScoreCache);
+        mScoreCache.clearScores();
     }
 
     /**
@@ -415,6 +489,7 @@
             }
         }
 
+        final List<NetworkKey> scoresToRequest = new ArrayList<>();
         if (results != null) {
             for (ScanResult result : results) {
                 // Ignore hidden and ad-hoc networks.
@@ -423,6 +498,11 @@
                     continue;
                 }
 
+                NetworkKey key = NetworkKey.createFromScanResult(result);
+                if (!mRequestedScores.contains(key)) {
+                    scoresToRequest.add(key);
+                }
+
                 boolean found = false;
                 for (AccessPoint accessPoint : apMap.getAll(result.SSID)) {
                     if (accessPoint.update(result)) {
@@ -457,27 +537,35 @@
             }
         }
 
+
+        requestScoresForNetworkKeys(scoresToRequest);
+        for (AccessPoint ap : accessPoints) {
+            ap.updateScores(mScoreCache);
+        }
+
         // Pre-sort accessPoints to speed preference insertion
         Collections.sort(accessPoints);
 
         // Log accesspoints that were deleted
-        if (DBG) Log.d(TAG, "------ Dumping SSIDs that were not seen on this scan ------");
-        for (AccessPoint prevAccessPoint : mInternalAccessPoints) {
-            if (prevAccessPoint.getSsid() == null)
-                continue;
-            String prevSsid = prevAccessPoint.getSsidStr();
-            boolean found = false;
-            for (AccessPoint newAccessPoint : accessPoints) {
-                if (newAccessPoint.getSsid() != null && newAccessPoint.getSsid()
-                        .equals(prevSsid)) {
-                    found = true;
-                    break;
+        if (DBG) {
+            Log.d(TAG, "------ Dumping SSIDs that were not seen on this scan ------");
+            for (AccessPoint prevAccessPoint : mInternalAccessPoints) {
+                if (prevAccessPoint.getSsid() == null)
+                    continue;
+                String prevSsid = prevAccessPoint.getSsidStr();
+                boolean found = false;
+                for (AccessPoint newAccessPoint : accessPoints) {
+                    if (newAccessPoint.getSsid() != null && newAccessPoint.getSsid()
+                            .equals(prevSsid)) {
+                        found = true;
+                        break;
+                    }
                 }
+                if (!found)
+                    Log.d(TAG, "Did not find " + prevSsid + " in this scan");
             }
-            if (!found)
-                if (DBG) Log.d(TAG, "Did not find " + prevSsid + " in this scan");
+            Log.d(TAG, "---- Done dumping SSIDs that were not seen on this scan ----");
         }
-        if (DBG) Log.d(TAG, "---- Done dumping SSIDs that were not seen on this scan ----");
 
         mInternalAccessPoints.clear();
         mInternalAccessPoints.addAll(accessPoints);
@@ -549,7 +637,38 @@
 
         boolean reorder = false;
         for (int i = mInternalAccessPoints.size() - 1; i >= 0; --i) {
-            if (mInternalAccessPoints.get(i).update(connectionConfig, mLastInfo, mLastNetworkInfo)) {
+            AccessPoint ap = mInternalAccessPoints.get(i);
+            if (ap.update(connectionConfig, mLastInfo, mLastNetworkInfo)) {
+                reorder = true;
+            }
+            if (ap.updateScores(mScoreCache)) {
+                reorder = true;
+            }
+        }
+        if (reorder) {
+            Collections.sort(mInternalAccessPoints);
+            mMainHandler.scheduleAPCopyingAndCloseWriteLock();
+        }
+    }
+
+    /**
+     * Update all the internal access points rankingScores and badge.
+     *
+     * <p>Will trigger a resort and notify listeners of changes if applicable.
+     */
+    private void updateNetworkScores() {
+        // Lock required to prevent accidental copying of AccessPoint states while the modification
+        // is in progress. see #copyAndNotifyListeners
+        long before = System.currentTimeMillis();
+        mInternalAccessPointsWriteLock.block();
+        if (DBG) {
+            Log.d(TAG, "Acquired AP lock on WorkerHandler for inserting NetworkScores. Wait time = " +
+                    (System.currentTimeMillis() - before) + "ms.");
+        }
+
+        boolean reorder = false;
+        for (int i = 0; i < mInternalAccessPoints.size(); i++) {
+            if (mInternalAccessPoints.get(i).updateScores(mScoreCache)) {
                 reorder = true;
             }
         }
@@ -661,6 +780,7 @@
         private static final int MSG_UPDATE_NETWORK_INFO = 1;
         private static final int MSG_RESUME = 2;
         private static final int MSG_UPDATE_WIFI_STATE = 3;
+        private static final int MSG_UPDATE_NETWORK_SCORES = 4;
 
         public WorkHandler(Looper looper) {
             super(looper);
@@ -695,6 +815,9 @@
                     mMainHandler.obtainMessage(MainHandler.MSG_WIFI_STATE_CHANGED, msg.arg1, 0)
                             .sendToTarget();
                     break;
+                case MSG_UPDATE_NETWORK_SCORES:
+                    updateNetworkScores();
+                    break;
             }
         }
     }
diff --git a/packages/SettingsLib/tests/integ/AndroidManifest.xml b/packages/SettingsLib/tests/integ/AndroidManifest.xml
index 00b2164..0d5ff2c 100644
--- a/packages/SettingsLib/tests/integ/AndroidManifest.xml
+++ b/packages/SettingsLib/tests/integ/AndroidManifest.xml
@@ -22,6 +22,7 @@
     <uses-permission android:name="android.permission.MANAGE_NETWORK_POLICY"/>
     <uses-permission android:name="android.permission.SET_TIME_ZONE" />
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
+    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
 
 
     <application>
diff --git a/packages/SettingsLib/tests/integ/src/com/android/settingslib/wifi/WifiTrackerTest.java b/packages/SettingsLib/tests/integ/src/com/android/settingslib/wifi/WifiTrackerTest.java
index c650190..eaf0367 100644
--- a/packages/SettingsLib/tests/integ/src/com/android/settingslib/wifi/WifiTrackerTest.java
+++ b/packages/SettingsLib/tests/integ/src/com/android/settingslib/wifi/WifiTrackerTest.java
@@ -15,29 +15,278 @@
  */
 package com.android.settingslib.wifi;
 
-
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
+import static org.mockito.Mockito.anyInt;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.ConnectivityManager;
+import android.net.NetworkKey;
+import android.net.NetworkScoreManager;
+import android.net.ScoredNetwork;
+import android.net.RssiCurve;
+import android.net.WifiKey;
 import android.net.wifi.ScanResult;
 import android.net.wifi.WifiConfiguration;
+import android.net.wifi.WifiManager;
+import android.net.wifi.WifiNetworkScoreCache;
+import android.net.wifi.WifiSsid;
+import android.os.Bundle;
 import android.os.SystemClock;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Looper;
+import android.provider.Settings;
 import android.support.test.InstrumentationRegistry;
 import android.support.test.filters.SmallTest;
 import android.support.test.runner.AndroidJUnit4;
 
+import org.junit.After;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import org.mockito.ArgumentCaptor;
+import org.mockito.Matchers;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.BitSet;
 import java.util.List;
-
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
 
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class WifiTrackerTest {
 
+    private static final String TAG = "WifiTrackerTest";
+    private static final int LATCH_TIMEOUT = 2000;
+
+    private static final String SSID_1 = "ssid1";
+    private static final String BSSID_1 = "00:00:00:00:00:00";
+    private static final NetworkKey NETWORK_KEY_1 =
+            new NetworkKey(new WifiKey('"' + SSID_1 + '"', BSSID_1));
+    private static final int RSSI_1 = -30;
+    private static final byte SCORE_1 = 10;
+    private static final int BADGE_1 = ScoredNetwork.BADGING_SD;
+
+    private static final String SSID_2 = "ssid2";
+    private static final String BSSID_2 = "AA:AA:AA:AA:AA:AA";
+    private static final NetworkKey NETWORK_KEY_2 =
+            new NetworkKey(new WifiKey('"' + SSID_2 + '"', BSSID_2));
+    private static final int RSSI_2 = -30;
+    private static final byte SCORE_2 = 15;
+    private static final int BADGE_2 = ScoredNetwork.BADGING_HD;
+
+    @Captor ArgumentCaptor<WifiNetworkScoreCache> mScoreCacheCaptor;
+    @Mock private ConnectivityManager mockConnectivityManager;
+    @Mock private NetworkScoreManager mockNetworkScoreManager;
+    @Mock private RssiCurve mockCurve1;
+    @Mock private RssiCurve mockCurve2;
+    @Mock private RssiCurve mockBadgeCurve1;
+    @Mock private RssiCurve mockBadgeCurve2;
+    @Mock private WifiManager mockWifiManager;
+    @Mock private WifiTracker.WifiListener mockWifiListener;
+
+    private final List<NetworkKey> mRequestedKeys = new ArrayList<>();
+
+    private Context mContext;
+    private CountDownLatch mAccessPointsChangedLatch;
+    private CountDownLatch mRequestScoresLatch;
+    private Handler mScannerHandler;
+    private HandlerThread mMainThread;
+    private HandlerThread mWorkerThread;
+    private Looper mLooper;
+    private Looper mMainLooper;
+    private int mOriginalSettingValue;
+
+    @Before
+    public void setUp() {
+        mContext = InstrumentationRegistry.getTargetContext();
+        MockitoAnnotations.initMocks(this);
+
+        mWorkerThread = new HandlerThread("TestHandlerWorkerThread");
+        mWorkerThread.start();
+        mLooper = mWorkerThread.getLooper();
+        mMainThread = new HandlerThread("TestHandlerThread");
+        mMainThread.start();
+        mMainLooper = mMainThread.getLooper();
+
+        // Make sure the scanner doesn't try to run on the testing thread.
+        HandlerThread scannerThread = new HandlerThread("ScannerWorkerThread");
+        scannerThread.start();
+        mScannerHandler = new Handler(scannerThread.getLooper());
+
+        when(mockWifiManager.isWifiEnabled()).thenReturn(true);
+        when(mockWifiManager.getScanResults())
+                .thenReturn(Arrays.asList(buildScanResult1(), buildScanResult2()));
+
+
+        when(mockCurve1.lookupScore(RSSI_1)).thenReturn(SCORE_1);
+        when(mockCurve2.lookupScore(RSSI_2)).thenReturn(SCORE_2);
+
+        when(mockBadgeCurve1.lookupScore(RSSI_1)).thenReturn((byte) BADGE_1);
+        when(mockBadgeCurve2.lookupScore(RSSI_2)).thenReturn((byte) BADGE_2);
+
+        doNothing()
+                .when(mockNetworkScoreManager)
+                .registerNetworkScoreCache(
+                        anyInt(),
+                        mScoreCacheCaptor.capture(),
+                        Matchers.anyInt());
+
+        // Capture requested keys and count down latch if present
+        doAnswer(
+                new Answer<Boolean>() {
+                    @Override
+                    public Boolean answer(InvocationOnMock input) {
+                        if (mRequestScoresLatch != null) {
+                            mRequestScoresLatch.countDown();
+                        }
+                        NetworkKey[] keys = (NetworkKey[]) input.getArguments()[0];
+                        for (NetworkKey key : keys) {
+                            mRequestedKeys.add(key);
+                        }
+                        return true;
+                    }
+                }).when(mockNetworkScoreManager).requestScores(Matchers.<NetworkKey[]>any());
+
+        doAnswer(
+                new Answer<Void>() {
+                  @Override
+                  public Void answer (InvocationOnMock invocation) throws Throwable {
+                    if (mAccessPointsChangedLatch != null) {
+                      mAccessPointsChangedLatch.countDown();
+                    }
+
+                    return null;
+                  }
+                }).when(mockWifiListener).onAccessPointsChanged();
+
+        mOriginalSettingValue = Settings.Global.getInt(
+            InstrumentationRegistry.getTargetContext().getContentResolver(),
+            Settings.Global.NETWORK_RECOMMENDATIONS_ENABLED,
+            0 /* disabled */);
+
+    }
+
+    @After
+    public void cleanUp() {
+        Settings.Global.putInt(
+            InstrumentationRegistry.getTargetContext().getContentResolver(),
+            Settings.Global.NETWORK_RECOMMENDATIONS_ENABLED,
+            mOriginalSettingValue);
+    }
+
+    private static ScanResult buildScanResult1() {
+        return new ScanResult(
+                WifiSsid.createFromAsciiEncoded(SSID_1),
+                BSSID_1,
+                0, // hessid
+                0, //anqpDomainId
+                null, // osuProviders
+                "", // capabilities
+                RSSI_1,
+                0, // frequency
+                SystemClock.elapsedRealtime() * 1000 /* microsecond timestamp */);
+    }
+
+    private static ScanResult buildScanResult2() {
+        return new ScanResult(
+                WifiSsid.createFromAsciiEncoded(SSID_2),
+                BSSID_2,
+                0, // hessid
+                0, //anqpDomainId
+                null, // osuProviders
+                "", // capabilities
+                RSSI_2,
+                0, // frequency
+                SystemClock.elapsedRealtime() * 1000 /* microsecond timestamp */);
+    }
+
+    private WifiTracker createTrackerAndInjectInitialScanResults() throws InterruptedException {
+        WifiTracker tracker = createMockedWifiTracker();
+        startTracking(tracker);
+
+        mAccessPointsChangedLatch = new CountDownLatch(1);
+        sendScanResultsAndProcess(tracker);
+        mAccessPointsChangedLatch.await(LATCH_TIMEOUT, TimeUnit.MILLISECONDS);
+
+        return tracker;
+    }
+
+    private WifiTracker createMockedWifiTracker() {
+        WifiTracker tracker =
+                new WifiTracker(
+                    mContext,
+                    mockWifiListener,
+                    mLooper,
+                    true,
+                    true,
+                    true,
+                    mockWifiManager,
+                    mockConnectivityManager,
+                        mockNetworkScoreManager, mMainLooper
+                );
+
+        return tracker;
+    }
+
+    private void startTracking(WifiTracker tracker)  throws InterruptedException {
+        CountDownLatch latch = new CountDownLatch(1);
+        mScannerHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                tracker.startTracking();
+                latch.countDown();
+            }
+        });
+        latch.await(LATCH_TIMEOUT, TimeUnit.MILLISECONDS);
+    }
+
+    private void sendScanResultsAndProcess(WifiTracker tracker) throws InterruptedException {
+        mAccessPointsChangedLatch = new CountDownLatch(1);
+        Intent i = new Intent(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);
+        tracker.mReceiver.onReceive(mContext, i);
+
+        mAccessPointsChangedLatch.await(LATCH_TIMEOUT, TimeUnit.MILLISECONDS);
+    }
+
+    private void updateScores() {
+        Bundle attr1 = new Bundle();
+        attr1.putParcelable(ScoredNetwork.ATTRIBUTES_KEY_BADGING_CURVE, mockBadgeCurve1);
+        ScoredNetwork sc1 =
+                new ScoredNetwork(
+                        NETWORK_KEY_1,
+                        mockCurve1,
+                        false /* meteredHint */,
+                        attr1);
+
+        Bundle attr2 = new Bundle();
+        attr2.putParcelable(ScoredNetwork.ATTRIBUTES_KEY_BADGING_CURVE, mockBadgeCurve2);
+        ScoredNetwork sc2 =
+                new ScoredNetwork(
+                        NETWORK_KEY_2,
+                        mockCurve2,
+                        false /* meteredHint */,
+                        attr2);
+
+        WifiNetworkScoreCache scoreCache = mScoreCacheCaptor.getValue();
+        scoreCache.updateScores(Arrays.asList(sc1, sc2));
+    }
+
     @Test
     public void testAccessPointListenerSetWhenLookingUpUsingScanResults() {
         ScanResult scanResult = new ScanResult();
@@ -47,7 +296,7 @@
         scanResult.capabilities = "";
 
         WifiTracker tracker = new WifiTracker(
-                InstrumentationRegistry.getTargetContext(), null, true, true);
+                InstrumentationRegistry.getTargetContext(), null, mLooper, true, true);
 
         AccessPoint result = tracker.getCachedOrCreate(scanResult, new ArrayList<AccessPoint>());
         assertTrue(result.mAccessPointListener != null);
@@ -63,9 +312,125 @@
         configuration.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
 
         WifiTracker tracker = new WifiTracker(
-                InstrumentationRegistry.getTargetContext(), null, true, true);
+                InstrumentationRegistry.getTargetContext(), null, mLooper, true, true);
 
         AccessPoint result = tracker.getCachedOrCreate(configuration, new ArrayList<AccessPoint>());
         assertTrue(result.mAccessPointListener != null);
     }
+
+    @Test
+    public void startAndStopTrackingShouldRegisterAndUnregisterScoreCache()
+            throws InterruptedException {
+        WifiTracker tracker = createMockedWifiTracker();
+
+        // Test register
+        startTracking(tracker);
+        verify(mockNetworkScoreManager)
+                .registerNetworkScoreCache(
+                          Matchers.anyInt(),
+                          mScoreCacheCaptor.capture(),
+                          Matchers.anyInt());
+
+        WifiNetworkScoreCache scoreCache = mScoreCacheCaptor.getValue();
+
+        // Test unregister
+        tracker.stopTracking();
+
+        verify(mockNetworkScoreManager)
+                .unregisterNetworkScoreCache(NetworkKey.TYPE_WIFI, scoreCache);
+    }
+
+    @Test
+    public void startTrackingShouldRequestScoresForCurrentAccessPoints() throws InterruptedException {
+        // Start the tracker and inject the initial scan results and then stop tracking
+        WifiTracker tracker =  createTrackerAndInjectInitialScanResults();
+
+        tracker.stopTracking();
+        mRequestedKeys.clear();
+
+        mRequestScoresLatch = new CountDownLatch(2);
+        startTracking(tracker);
+        mRequestScoresLatch.await(LATCH_TIMEOUT, TimeUnit.MILLISECONDS);
+
+        assertTrue(mRequestedKeys.contains(NETWORK_KEY_1));
+        assertTrue(mRequestedKeys.contains(NETWORK_KEY_2));
+    }
+
+    @Test
+    public void scoreCacheUpdateScoresShouldTriggerOnAccessPointsChanged() throws InterruptedException {
+        WifiTracker tracker = createMockedWifiTracker();
+        startTracking(tracker);
+        sendScanResultsAndProcess(tracker);
+
+        updateScoresAndWaitForAccessPointsChangedCallback();
+    }
+
+    private void updateScoresAndWaitForAccessPointsChangedCallback() throws InterruptedException {
+        mAccessPointsChangedLatch = new CountDownLatch(2);
+        updateScores();
+        mAccessPointsChangedLatch.await(LATCH_TIMEOUT, TimeUnit.MILLISECONDS);
+    }
+
+    @Test
+    public void scoreCacheUpdateScoresShouldChangeSortOrder() throws InterruptedException {
+        WifiTracker tracker = createTrackerAndInjectInitialScanResults();
+        List<AccessPoint> aps = tracker.getAccessPoints();
+        assertTrue(aps.size() == 2);
+        assertEquals(aps.get(0).getSsidStr(), SSID_1);
+        assertEquals(aps.get(1).getSsidStr(), SSID_2);
+
+        updateScoresAndWaitForAccessPointsChangedCallback();
+
+        aps = tracker.getAccessPoints();
+        assertTrue(aps.size() == 2);
+        assertEquals(aps.get(0).getSsidStr(), SSID_2);
+        assertEquals(aps.get(1).getSsidStr(), SSID_1);
+
+    }
+
+    @Test
+    public void scoreCacheUpdateScoresShouldInsertBadgeIntoAccessPoint() throws InterruptedException {
+        WifiTracker tracker = createTrackerAndInjectInitialScanResults();
+        updateScoresAndWaitForAccessPointsChangedCallback();
+
+        List<AccessPoint> aps = tracker.getAccessPoints();
+
+        for (AccessPoint ap : aps) {
+            if (ap.getSsidStr().equals(SSID_1)) {
+                assertEquals(BADGE_1, ap.getBadge());
+            } else if (ap.getSsidStr().equals(SSID_2)) {
+                assertEquals(BADGE_2, ap.getBadge());
+            }
+        }
+    }
+
+    @Test
+    public void scoresShouldBeRequestedForNewScanResultOnly()  throws InterruptedException {
+        mRequestScoresLatch = new CountDownLatch(2);
+        WifiTracker tracker = createTrackerAndInjectInitialScanResults();
+        mRequestScoresLatch.await(LATCH_TIMEOUT, TimeUnit.MILLISECONDS);
+        mRequestedKeys.clear();
+
+        String ssid = "ssid3";
+        String bssid = "00:00:00:00:00:00";
+        ScanResult newResult = new ScanResult(
+                WifiSsid.createFromAsciiEncoded(ssid),
+                bssid,
+                0, // hessid
+                0, //anqpDomainId
+                null, // osuProviders
+                "", // capabilities
+                RSSI_1,
+                0, // frequency
+                SystemClock.elapsedRealtime() * 1000);
+        when(mockWifiManager.getScanResults())
+                .thenReturn(Arrays.asList(buildScanResult1(), buildScanResult2(), newResult));
+
+        mRequestScoresLatch = new CountDownLatch(1);
+        sendScanResultsAndProcess(tracker);
+        mRequestScoresLatch.await(LATCH_TIMEOUT, TimeUnit.MILLISECONDS);
+
+        assertEquals(1, mRequestedKeys.size());
+        assertTrue(mRequestedKeys.contains(new NetworkKey(new WifiKey('"' + ssid + '"', bssid))));
+    }
 }
diff --git a/packages/SettingsLib/tests/robotests/src/com/android/settingslib/drawer/TileUtilsTest.java b/packages/SettingsLib/tests/robotests/src/com/android/settingslib/drawer/TileUtilsTest.java
index d8082c4..c95cac5 100644
--- a/packages/SettingsLib/tests/robotests/src/com/android/settingslib/drawer/TileUtilsTest.java
+++ b/packages/SettingsLib/tests/robotests/src/com/android/settingslib/drawer/TileUtilsTest.java
@@ -255,6 +255,7 @@
 
         Bundle bundle = new Bundle();
         bundle.putInt("com.android.settings.icon", 161803);
+        bundle.putString("com.android.settings.icon_package", "abc");
         bundle.putString("com.android.settings.summary", "dynamic-summary");
         when(mIContentProvider.call(anyString(),
                 eq(TileUtils.getMethodFromUri(Uri.parse(URI_GET_ICON))), eq(URI_GET_ICON), any()))
diff --git a/packages/SystemUI/AndroidManifest.xml b/packages/SystemUI/AndroidManifest.xml
index ff76c56..fede34d 100644
--- a/packages/SystemUI/AndroidManifest.xml
+++ b/packages/SystemUI/AndroidManifest.xml
@@ -60,6 +60,7 @@
     <uses-permission android:name="android.permission.CONNECTIVITY_INTERNAL" />
     <uses-permission android:name="android.permission.TETHER_PRIVILEGED" />
     <uses-permission android:name="android.permission.READ_NETWORK_USAGE_HISTORY" />
+    <uses-permission android:name="android.permission.REQUEST_NETWORK_SCORES" />
     <uses-permission android:name="android.permission.CONTROL_VPN" />
     <uses-permission android:name="android.permission.PEERS_MAC_ADDRESS"/>
     <!-- Physical hardware -->
@@ -289,7 +290,7 @@
                   android:resumeWhilePausing="true"
                   android:screenOrientation="behind"
                   android:resizeableActivity="true"
-                  android:configChanges="orientation|screenSize|smallestScreenSize|screenLayout"
+                  android:configChanges="orientation|screenSize|smallestScreenSize|screenLayout|keyboard|keyboardHidden"
                   android:theme="@style/RecentsTheme.Wallpaper">
             <intent-filter>
                 <action android:name="com.android.systemui.recents.TOGGLE_RECENTS" />
diff --git a/packages/SystemUI/res/drawable/recents_grid_task_view_focus_frame_background.xml b/packages/SystemUI/res/drawable/recents_grid_task_view_focus_frame_background.xml
index a85beb8..ea03a50 100644
--- a/packages/SystemUI/res/drawable/recents_grid_task_view_focus_frame_background.xml
+++ b/packages/SystemUI/res/drawable/recents_grid_task_view_focus_frame_background.xml
@@ -15,5 +15,5 @@
 -->
 <shape xmlns:android="http://schemas.android.com/apk/res/android">
   <solid android:color="#61FFFFFF" />
-  <corners android:radius="8dp"/>
+  <corners android:radius="@dimen/recents_grid_task_view_rounded_corners_radius"/>
 </shape>
\ No newline at end of file
diff --git a/packages/SystemUI/res/layout/recents_grid_task_view.xml b/packages/SystemUI/res/layout/recents_grid_task_view.xml
index 53bec70..1c9b9ac 100644
--- a/packages/SystemUI/res/layout/recents_grid_task_view.xml
+++ b/packages/SystemUI/res/layout/recents_grid_task_view.xml
@@ -18,7 +18,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:focusable="true">
-    <com.android.systemui.recents.views.TaskViewThumbnail
+    <com.android.systemui.recents.views.grid.GridTaskViewThumbnail
         android:id="@+id/task_view_thumbnail"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />
diff --git a/packages/SystemUI/res/values/dimens_grid.xml b/packages/SystemUI/res/values/dimens_grid.xml
index 0b9836ff..5858443 100644
--- a/packages/SystemUI/res/values/dimens_grid.xml
+++ b/packages/SystemUI/res/values/dimens_grid.xml
@@ -22,5 +22,6 @@
   <dimen name="recents_grid_task_view_header_height">44dp</dimen>
   <dimen name="recents_grid_task_view_header_button_padding">8dp</dimen>
   <dimen name="recents_grid_task_view_focused_frame_thickness">8dp</dimen>
+  <dimen name="recents_grid_task_view_rounded_corners_radius">8dp</dimen>
 </resources>
 
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/FakeShadowDrawable.java b/packages/SystemUI/src/com/android/systemui/recents/views/FakeShadowDrawable.java
index d64a676..79a774f 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/FakeShadowDrawable.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/FakeShadowDrawable.java
@@ -30,6 +30,7 @@
 import android.util.Log;
 
 import com.android.systemui.R;
+import com.android.systemui.recents.Recents;
 import com.android.systemui.recents.RecentsConfiguration;
 
 /**
@@ -90,8 +91,10 @@
         mCornerShadowPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG);
         mCornerShadowPaint.setStyle(Paint.Style.FILL);
         mCornerShadowPaint.setDither(true);
-        mCornerRadius = resources.getDimensionPixelSize(
-                R.dimen.recents_task_view_rounded_corners_radius);
+        mCornerRadius = Recents.getConfiguration().isGridEnabled ?
+                resources.getDimensionPixelSize(
+                    R.dimen.recents_grid_task_view_rounded_corners_radius) :
+                resources.getDimensionPixelSize(R.dimen.recents_task_view_rounded_corners_radius);
         mCardBounds = new RectF();
         mEdgeShadowPaint = new Paint(mCornerShadowPaint);
     }
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
index 3f28d9d..8ae7a83 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackView.java
@@ -266,8 +266,9 @@
         mStackScroller = new TaskStackViewScroller(context, this, mLayoutAlgorithm);
         mTouchHandler = new TaskStackViewTouchHandler(context, this, mStackScroller);
         mAnimationHelper = new TaskStackAnimationHelper(context, this);
-        mTaskCornerRadiusPx = res.getDimensionPixelSize(
-                R.dimen.recents_task_view_rounded_corners_radius);
+        mTaskCornerRadiusPx = Recents.getConfiguration().isGridEnabled ?
+                res.getDimensionPixelSize(R.dimen.recents_grid_task_view_rounded_corners_radius) :
+                res.getDimensionPixelSize(R.dimen.recents_task_view_rounded_corners_radius);
         mDividerSize = ssp.getDockedDividerSize(context);
         mDisplayOrientation = Utilities.getAppConfiguration(mContext).orientation;
         mDisplayRect = ssp.getDisplayRect();
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java
index c0cc83f..0777163 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewHeader.java
@@ -201,7 +201,9 @@
         Resources res = context.getResources();
         mLightDismissDrawable = context.getDrawable(R.drawable.recents_dismiss_light);
         mDarkDismissDrawable = context.getDrawable(R.drawable.recents_dismiss_dark);
-        mCornerRadius = res.getDimensionPixelSize(R.dimen.recents_task_view_rounded_corners_radius);
+        mCornerRadius = Recents.getConfiguration().isGridEnabled ?
+                res.getDimensionPixelSize(R.dimen.recents_grid_task_view_rounded_corners_radius) :
+                res.getDimensionPixelSize(R.dimen.recents_task_view_rounded_corners_radius);
         mHighlightHeight = res.getDimensionPixelSize(R.dimen.recents_task_view_highlight);
         mTaskBarViewLightTextColor = context.getColor(R.color.recents_task_bar_light_text_color);
         mTaskBarViewDarkTextColor = context.getColor(R.color.recents_task_bar_dark_text_color);
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewThumbnail.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewThumbnail.java
index bae5daa..792679b 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewThumbnail.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskViewThumbnail.java
@@ -60,11 +60,11 @@
 
     // Drawing
     @ViewDebug.ExportedProperty(category="recents")
-    private Rect mTaskViewRect = new Rect();
+    protected Rect mTaskViewRect = new Rect();
     @ViewDebug.ExportedProperty(category="recents")
-    private Rect mThumbnailRect = new Rect();
+    protected Rect mThumbnailRect = new Rect();
     @ViewDebug.ExportedProperty(category="recents")
-    private float mThumbnailScale;
+    protected float mThumbnailScale;
     private float mFullscreenThumbnailScale;
     /** The height, in pixels, of the task view's title bar. */
     private int mTitleBarHeight;
@@ -72,14 +72,14 @@
     private boolean mOverlayHeaderOnThumbnailActionBar = true;
     private ThumbnailData mThumbnailData;
 
-    private int mCornerRadius;
+    protected int mCornerRadius;
     @ViewDebug.ExportedProperty(category="recents")
     private float mDimAlpha;
     private Matrix mMatrix = new Matrix();
-    private Paint mDrawPaint = new Paint();
+    protected Paint mDrawPaint = new Paint();
     private Paint mLockedPaint = new Paint();
-    private Paint mBgFillPaint = new Paint();
-    private BitmapShader mBitmapShader;
+    protected Paint mBgFillPaint = new Paint();
+    protected BitmapShader mBitmapShader;
     private LightingColorFilter mLightingColorFilter = new LightingColorFilter(0xffffffff, 0);
 
     // Clip the top of the thumbnail against the opaque header bar that overlaps this view
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/grid/GridTaskViewThumbnail.java b/packages/SystemUI/src/com/android/systemui/recents/views/grid/GridTaskViewThumbnail.java
new file mode 100644
index 0000000..2c3e42b
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/grid/GridTaskViewThumbnail.java
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.recents.views.grid;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Path;
+import android.util.AttributeSet;
+
+import com.android.systemui.R;
+import com.android.systemui.recents.views.TaskViewThumbnail;
+
+public class GridTaskViewThumbnail extends TaskViewThumbnail {
+
+    private Path mThumbnailOutline;
+    private Path mRestBackgroundOutline;
+    private Path mFullBackgroundOutline;
+    // True if either this view's size or thumbnail scale has changed and mThumbnailOutline should
+    // be updated.
+    private boolean mUpdateThumbnailOutline = true;
+
+    public GridTaskViewThumbnail(Context context) {
+        this(context, null);
+    }
+
+    public GridTaskViewThumbnail(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public GridTaskViewThumbnail(Context context, AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0);
+    }
+
+    public GridTaskViewThumbnail(Context context, AttributeSet attrs, int defStyleAttr,
+        int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        mCornerRadius = getResources().getDimensionPixelSize(
+                R.dimen.recents_grid_task_view_rounded_corners_radius);
+    }
+
+    /**
+     * Called when the task view frame changes, allowing us to move the contents of the header
+     * to match the frame changes.
+     */
+    public void onTaskViewSizeChanged(int width, int height) {
+        mUpdateThumbnailOutline = true;
+        super.onTaskViewSizeChanged(width, height);
+    }
+
+    /**
+     * Updates the scale of the bitmap relative to this view.
+     */
+    public void updateThumbnailMatrix() {
+        mUpdateThumbnailOutline = true;
+        super.updateThumbnailMatrix();
+    }
+
+    private void updateThumbnailOutline() {
+        final int titleHeight = getResources().getDimensionPixelSize(
+            R.dimen.recents_grid_task_view_header_height);
+        final int viewWidth = mTaskViewRect.width();
+        final int viewHeight = mTaskViewRect.height() - titleHeight;
+        final int thumbnailWidth = Math.min(viewWidth,
+            (int) (mThumbnailRect.width() * mThumbnailScale));
+        final int thumbnailHeight = Math.min(viewHeight,
+            (int) (mThumbnailRect.height() * mThumbnailScale));
+        // Draw the thumbnail, we only round the bottom corners:
+        //
+        // outerLeft                outerRight
+        //    <----------------------->            mRestBackgroundOutline
+        //    _________________________            (thumbnailWidth < viewWidth)
+        //    |_______________________| outerTop     A ____ B
+        //    |                       |    ↑           |  |
+        //    |                       |    |           |  |
+        //    |                       |    |           |  |
+        //    |                       |    |           |  | C
+        //    \_______________________/    ↓           |__/
+        //  mCornerRadius             outerBottom    E    D
+        //
+        //  mRestBackgroundOutline (thumbnailHeight < viewHeight)
+        //  A _________________________ B
+        //    |                       | C
+        //  F \_______________________/
+        //    E                       D
+        final int outerLeft = 0;
+        final int outerTop = 0;
+        final int outerRight = outerLeft + thumbnailWidth;
+        final int outerBottom = outerTop + thumbnailHeight;
+        mThumbnailOutline = new Path();
+        mThumbnailOutline.moveTo(outerLeft, outerTop);
+        mThumbnailOutline.lineTo(outerRight, outerTop);
+        mThumbnailOutline.lineTo(outerRight, outerBottom - mCornerRadius);
+        mThumbnailOutline.arcTo(outerRight -  2 * mCornerRadius, outerBottom - 2 * mCornerRadius,
+                outerRight, outerBottom, 0, 90, false);
+        mThumbnailOutline.lineTo(outerLeft + mCornerRadius, outerBottom);
+        mThumbnailOutline.arcTo(outerLeft, outerBottom - 2 * mCornerRadius,
+                outerLeft + 2 * mCornerRadius, outerBottom, 90, 90, false);
+        mThumbnailOutline.lineTo(outerLeft, outerTop);
+        mThumbnailOutline.close();
+
+        if (mBitmapShader != null && thumbnailWidth > 0 && thumbnailHeight > 0) {
+            if (thumbnailWidth < viewWidth) {
+                final int l = Math.max(0, outerRight - mCornerRadius);
+                final int r = outerRight;
+                final int t = outerTop;
+                final int b = outerBottom;
+                mRestBackgroundOutline = new Path();
+                mRestBackgroundOutline.moveTo(l, t); // A
+                mRestBackgroundOutline.lineTo(r, t); // B
+                mRestBackgroundOutline.lineTo(r, b - mCornerRadius); // C
+                mRestBackgroundOutline.arcTo(r -  2 * mCornerRadius, b - 2 * mCornerRadius, r, b,
+                        0, 90, false); // D
+                mRestBackgroundOutline.lineTo(l, b); // E
+                mRestBackgroundOutline.lineTo(l, t); // A
+                mRestBackgroundOutline.close();
+
+            }
+            if (thumbnailHeight < viewHeight) {
+                final int l = outerLeft;
+                final int r = outerRight;
+                final int t = Math.max(0, thumbnailHeight - mCornerRadius);
+                final int b = outerBottom;
+                mRestBackgroundOutline = new Path();
+                mRestBackgroundOutline.moveTo(l, t); // A
+                mRestBackgroundOutline.lineTo(r, t); // B
+                mRestBackgroundOutline.lineTo(r, b - mCornerRadius); // C
+                mRestBackgroundOutline.arcTo(r -  2 * mCornerRadius, b - 2 * mCornerRadius, r, b,
+                        0, 90, false); // D
+                mRestBackgroundOutline.lineTo(l + mCornerRadius, b); // E
+                mRestBackgroundOutline.arcTo(l, b - 2 * mCornerRadius, l + 2 * mCornerRadius, b,
+                        90, 90, false); // F
+                mRestBackgroundOutline.lineTo(l, t); // A
+                mRestBackgroundOutline.close();
+
+            }
+        } else {
+            mFullBackgroundOutline = mThumbnailOutline;
+        }
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        final int titleHeight = getResources().getDimensionPixelSize(
+            R.dimen.recents_grid_task_view_header_height);
+        final int viewWidth = mTaskViewRect.width();
+        final int viewHeight = mTaskViewRect.height() - titleHeight;
+        final int thumbnailWidth = Math.min(viewWidth,
+            (int) (mThumbnailRect.width() * mThumbnailScale));
+        final int thumbnailHeight = Math.min(viewHeight,
+            (int) (mThumbnailRect.height() * mThumbnailScale));
+
+        if (mUpdateThumbnailOutline) {
+            updateThumbnailOutline();
+            mUpdateThumbnailOutline = false;
+        }
+        if (mBitmapShader != null && thumbnailWidth > 0 && thumbnailHeight > 0) {
+            // Draw the background, there will be some small overdraw with the thumbnail
+            if (thumbnailWidth < viewWidth) {
+                // Portrait thumbnail on a landscape task view
+                canvas.drawPath(mRestBackgroundOutline, mBgFillPaint);
+            }
+            if (thumbnailHeight < viewHeight) {
+                // Landscape thumbnail on a portrait task view
+                canvas.drawPath(mRestBackgroundOutline, mBgFillPaint);
+            }
+            canvas.drawPath(mThumbnailOutline, mDrawPaint);
+        } else {
+            canvas.drawPath(mFullBackgroundOutline, mBgFillPaint);
+        }
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/grid/TaskGridLayoutAlgorithm.java b/packages/SystemUI/src/com/android/systemui/recents/views/grid/TaskGridLayoutAlgorithm.java
index 78c26dd..02d1cc1 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/grid/TaskGridLayoutAlgorithm.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/grid/TaskGridLayoutAlgorithm.java
@@ -105,11 +105,13 @@
             if (maxTaskHeight >= maxTaskWidth / mAppAspectRatio + mTitleBarHeight) {
                 // Width bound.
                 taskWidth = maxTaskWidth;
-                taskHeight = (int) (maxTaskWidth / mAppAspectRatio + mTitleBarHeight);
+                // Here we should round the height to the nearest integer.
+                taskHeight = (int) (maxTaskWidth / mAppAspectRatio + mTitleBarHeight + 0.5);
             } else {
                 // Height bound.
                 taskHeight = maxTaskHeight;
-                taskWidth = (int) ((taskHeight - mTitleBarHeight) * mAppAspectRatio);
+                // Here we should round the width to the nearest integer.
+                taskWidth = (int) ((taskHeight - mTitleBarHeight) * mAppAspectRatio + 0.5);
             }
             size.set(0, 0, taskWidth, taskHeight);
 
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index 62ea9e3..1339c50 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -3303,6 +3303,9 @@
     RESERVED_FOR_LOGBUILDER_TIMESTAMP = 805;
     RESERVED_FOR_LOGBUILDER_PACKAGENAME = 806;
 
+    // ACTION: "Force stop" action on an app
+    ACTION_APP_FORCE_STOP = 807;
+
     // ---- End O Constants, all O constants go above this line ----
 
     // Add new aosp constants above this line.
diff --git a/services/backup/java/com/android/server/backup/BackupManagerService.java b/services/backup/java/com/android/server/backup/BackupManagerService.java
index 31ecb75..7e82586 100644
--- a/services/backup/java/com/android/server/backup/BackupManagerService.java
+++ b/services/backup/java/com/android/server/backup/BackupManagerService.java
@@ -577,15 +577,18 @@
         public ArrayList<String> fullPackages;
         public IBackupObserver observer;
         public boolean userInitiated;
+        public boolean nonIncrementalBackup;
 
         BackupParams(IBackupTransport transport, String dirName, ArrayList<String> kvPackages,
-                ArrayList<String> fullPackages, IBackupObserver observer, boolean userInitiated) {
+                ArrayList<String> fullPackages, IBackupObserver observer, boolean userInitiated,
+                boolean nonIncrementalBackup) {
             this.transport = transport;
             this.dirName = dirName;
             this.kvPackages = kvPackages;
             this.fullPackages = fullPackages;
             this.observer = observer;
             this.userInitiated = userInitiated;
+            this.nonIncrementalBackup = nonIncrementalBackup;
         }
     }
 
@@ -794,7 +797,7 @@
                     try {
                         String dirName = transport.transportDirName();
                         PerformBackupTask pbt = new PerformBackupTask(transport, dirName,
-                                queue, oldJournal, null, null, false);
+                                queue, oldJournal, null, null, false, false /* nonIncremental */);
                         Message pbtMessage = obtainMessage(MSG_BACKUP_RESTORE_STEP, pbt);
                         sendMessage(pbtMessage);
                     } catch (Exception e) {
@@ -1033,7 +1036,8 @@
                 mWakelock.acquire();
 
                 PerformBackupTask pbt = new PerformBackupTask(params.transport, params.dirName,
-                    kvQueue, null, params.observer, params.fullPackages, true);
+                        kvQueue, null, params.observer, params.fullPackages, true,
+                        params.nonIncrementalBackup);
                 Message pbtMessage = obtainMessage(MSG_BACKUP_RESTORE_STEP, pbt);
                 sendMessage(pbtMessage);
                 break;
@@ -2492,7 +2496,7 @@
         return token;
     }
 
-    public int requestBackup(String[] packages, IBackupObserver observer) {
+    public int requestBackup(String[] packages, IBackupObserver observer, int flags) {
         mContext.enforceCallingPermission(android.Manifest.permission.BACKUP, "requestBackup");
 
         if (packages == null || packages.length < 1) {
@@ -2510,6 +2514,10 @@
         ArrayList<String> fullBackupList = new ArrayList<>();
         ArrayList<String> kvBackupList = new ArrayList<>();
         for (String packageName : packages) {
+            if (PACKAGE_MANAGER_SENTINEL.equals(packageName)) {
+                kvBackupList.add(packageName);
+                continue;
+            }
             try {
                 PackageInfo packageInfo = mPackageManager.getPackageInfo(packageName,
                         PackageManager.GET_SIGNATURES);
@@ -2543,9 +2551,12 @@
             sendBackupFinished(observer, BackupManager.ERROR_TRANSPORT_ABORTED);
             return BackupManager.ERROR_TRANSPORT_ABORTED;
         }
+
+        boolean nonIncrementalBackup = (flags & BackupManager.FLAG_NON_INCREMENTAL_BACKUP) != 0;
+
         Message msg = mBackupHandler.obtainMessage(MSG_REQUEST_BACKUP);
         msg.obj = new BackupParams(transport, dirName, kvBackupList, fullBackupList, observer,
-                true);
+                true, nonIncrementalBackup);
         mBackupHandler.sendMessage(msg);
         return BackupManager.SUCCESS;
     }
@@ -2673,17 +2684,20 @@
         ParcelFileDescriptor mNewState;
         int mStatus;
         boolean mFinished;
-        boolean mUserInitiated;
+        final boolean mUserInitiated;
+        final boolean mNonIncremental;
 
         public PerformBackupTask(IBackupTransport transport, String dirName,
                 ArrayList<BackupRequest> queue, File journal, IBackupObserver observer,
-                ArrayList<String> pendingFullBackups, boolean userInitiated) {
+                ArrayList<String> pendingFullBackups, boolean userInitiated,
+                boolean nonIncremental) {
             mTransport = transport;
             mOriginalQueue = queue;
             mJournal = journal;
             mObserver = observer;
             mPendingFullBackups = pendingFullBackups;
             mUserInitiated = userInitiated;
+            mNonIncremental = nonIncremental;
 
             mStateDir = new File(mBaseStateDir, dirName);
 
@@ -2748,6 +2762,10 @@
             // the way.
             mQueue = (ArrayList<BackupRequest>) mOriginalQueue.clone();
 
+            // When the transport is forcing non-incremental key/value payloads, we send the
+            // metadata only if it explicitly asks for it.
+            boolean skipPm = mNonIncremental;
+
             // The app metadata pseudopackage might also be represented in the
             // backup queue if apps have been added/removed since the last time
             // we performed a backup.  Drop it from the working queue now that
@@ -2758,6 +2776,7 @@
                         Slog.i(TAG, "Metadata in queue; eliding");
                     }
                     mQueue.remove(i);
+                    skipPm = false;
                     break;
                 }
             }
@@ -2785,22 +2804,27 @@
                     }
                 }
 
-                // The package manager doesn't have a proper <application> etc, but since
-                // it's running here in the system process we can just set up its agent
-                // directly and use a synthetic BackupRequest.  We always run this pass
-                // because it's cheap and this way we guarantee that we don't get out of
-                // step even if we're selecting among various transports at run time.
-                if (mStatus == BackupTransport.TRANSPORT_OK) {
-                    PackageManagerBackupAgent pmAgent = new PackageManagerBackupAgent(
-                            mPackageManager);
-                    mStatus = invokeAgentForBackup(PACKAGE_MANAGER_SENTINEL,
-                            IBackupAgent.Stub.asInterface(pmAgent.onBind()), mTransport);
-                    addBackupTrace("PMBA invoke: " + mStatus);
+                if (skipPm) {
+                    Slog.d(TAG, "Skipping backup of package metadata.");
+                    executeNextState(BackupState.RUNNING_QUEUE);
+                } else {
+                    // The package manager doesn't have a proper <application> etc, but since
+                    // it's running here in the system process we can just set up its agent
+                    // directly and use a synthetic BackupRequest.  We always run this pass
+                    // because it's cheap and this way we guarantee that we don't get out of
+                    // step even if we're selecting among various transports at run time.
+                    if (mStatus == BackupTransport.TRANSPORT_OK) {
+                        PackageManagerBackupAgent pmAgent = new PackageManagerBackupAgent(
+                                mPackageManager);
+                        mStatus = invokeAgentForBackup(PACKAGE_MANAGER_SENTINEL,
+                                IBackupAgent.Stub.asInterface(pmAgent.onBind()), mTransport);
+                        addBackupTrace("PMBA invoke: " + mStatus);
 
-                    // Because the PMBA is a local instance, it has already executed its
-                    // backup callback and returned.  Blow away the lingering (spurious)
-                    // pending timeout message for it.
-                    mBackupHandler.removeMessages(MSG_TIMEOUT);
+                        // Because the PMBA is a local instance, it has already executed its
+                        // backup callback and returned.  Blow away the lingering (spurious)
+                        // pending timeout message for it.
+                        mBackupHandler.removeMessages(MSG_TIMEOUT);
+                    }
                 }
 
                 if (mStatus == BackupTransport.TRANSPORT_NOT_INITIALIZED) {
@@ -3066,6 +3090,7 @@
             if (DEBUG) Slog.d(TAG, "invokeAgentForBackup on " + packageName);
             addBackupTrace("invoking " + packageName);
 
+            File blankStateName = new File(mStateDir, "blank_state");
             mSavedStateName = new File(mStateDir, packageName);
             mBackupDataName = new File(mDataDir, packageName + ".data");
             mNewStateName = new File(mStateDir, packageName + ".new");
@@ -3088,9 +3113,10 @@
                 }
 
                 // In a full backup, we pass a null ParcelFileDescriptor as
-                // the saved-state "file". This is by definition an incremental,
-                // so we build a saved state file to pass.
-                mSavedState = ParcelFileDescriptor.open(mSavedStateName,
+                // the saved-state "file". For key/value backups we pass the old state if
+                // an incremental backup is required, and a blank state otherwise.
+                mSavedState = ParcelFileDescriptor.open(
+                        mNonIncremental ? blankStateName : mSavedStateName,
                         ParcelFileDescriptor.MODE_READ_ONLY |
                         ParcelFileDescriptor.MODE_CREATE);  // Make an empty file if necessary
 
@@ -3120,6 +3146,10 @@
                         e.toString());
                 agentErrorCleanup();
                 return BackupTransport.AGENT_ERROR;
+            } finally {
+                if (mNonIncremental) {
+                    blankStateName.delete();
+                }
             }
 
             // At this point the agent is off and running.  The next thing to happen will
diff --git a/services/backup/java/com/android/server/backup/Trampoline.java b/services/backup/java/com/android/server/backup/Trampoline.java
index 312b878..d677f5e 100644
--- a/services/backup/java/com/android/server/backup/Trampoline.java
+++ b/services/backup/java/com/android/server/backup/Trampoline.java
@@ -338,9 +338,10 @@
     }
 
     @Override
-    public int requestBackup(String[] packages, IBackupObserver observer) throws RemoteException {
+    public int requestBackup(String[] packages, IBackupObserver observer, int flags)
+            throws RemoteException {
         BackupManagerService svc = mService;
-        return (svc != null) ? svc.requestBackup(packages, observer) : null;
+        return (svc != null) ? svc.requestBackup(packages, observer, flags) : null;
     }
 
     @Override
diff --git a/services/core/java/com/android/server/am/ActiveServices.java b/services/core/java/com/android/server/am/ActiveServices.java
index 7406ff8..7fdf7eb 100644
--- a/services/core/java/com/android/server/am/ActiveServices.java
+++ b/services/core/java/com/android/server/am/ActiveServices.java
@@ -1916,6 +1916,7 @@
                     mAm.grantUriPermissionUncheckedFromIntentLocked(si.neededGrants,
                             si.getUriPermissionsLocked());
                 }
+                // TODO b/34123112; Insert ephemeral grant here
                 bumpServiceExecutingLocked(r, execInFg, "start");
                 if (!oomAdjusted) {
                     oomAdjusted = true;
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 0caf336..07c4c65 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -8195,6 +8195,12 @@
         return pi;
     }
 
+    void grantEphemeralAccessLocked(int userId, Intent intent,
+            int targetAppId, int ephemeralAppId) {
+        getPackageManagerInternalLocked().
+                grantEphemeralAccess(userId, intent, targetAppId, ephemeralAppId);
+    }
+
     private UriPermission findUriPermissionLocked(int targetUid, GrantUri grantUri) {
         final ArrayMap<GrantUri, UriPermission> targetUris = mGrantedUriPermissions.get(targetUid);
         if (targetUris != null) {
diff --git a/services/core/java/com/android/server/am/ActivityStarter.java b/services/core/java/com/android/server/am/ActivityStarter.java
index 3f71d12..46e00479 100644
--- a/services/core/java/com/android/server/am/ActivityStarter.java
+++ b/services/core/java/com/android/server/am/ActivityStarter.java
@@ -1131,7 +1131,8 @@
 
         mService.grantUriPermissionFromIntentLocked(mCallingUid, mStartActivity.packageName,
                 mIntent, mStartActivity.getUriPermissionsLocked(), mStartActivity.userId);
-
+        mService.grantEphemeralAccessLocked(mStartActivity.userId, mIntent,
+                mStartActivity.appInfo.uid, UserHandle.getAppId(mCallingUid));
         if (mSourceRecord != null && mSourceRecord.isRecentsActivity()) {
             mStartActivity.task.setTaskToReturnTo(RECENTS_ACTIVITY_TYPE);
         }
diff --git a/services/core/java/com/android/server/pm/EphemeralApplicationRegistry.java b/services/core/java/com/android/server/pm/EphemeralApplicationRegistry.java
index 1e3e0ca..e8be629 100644
--- a/services/core/java/com/android/server/pm/EphemeralApplicationRegistry.java
+++ b/services/core/java/com/android/server/pm/EphemeralApplicationRegistry.java
@@ -17,6 +17,7 @@
 package com.android.server.pm;
 
 import android.content.Context;
+import android.content.Intent;
 import android.content.pm.EphemeralApplicationInfo;
 import android.content.pm.PackageParser;
 import android.content.pm.PackageUserState;
@@ -27,10 +28,13 @@
 import android.graphics.drawable.Drawable;
 import android.os.Binder;
 import android.os.Environment;
+import android.os.UserHandle;
 import android.provider.Settings;
 import android.util.AtomicFile;
 import android.util.Slog;
 import android.util.SparseArray;
+import android.util.SparseBooleanArray;
+import android.util.SparseIntArray;
 import android.util.Xml;
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.util.ArrayUtils;
@@ -51,6 +55,7 @@
 import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
@@ -62,7 +67,7 @@
 class EphemeralApplicationRegistry {
     private static final boolean DEBUG = false;
 
-    private static final boolean ENABLED = false;
+    private static final boolean ENABLED = true;
 
     private static final String LOG_TAG = "EphemeralAppRegistry";
 
@@ -90,6 +95,16 @@
     @GuardedBy("mService.mPackages")
     private SparseArray<List<UninstalledEphemeralAppState>> mUninstalledEphemeralApps;
 
+    /**
+     * Automatic grants for access to instant app metadata.
+     * The key is the target application UID.
+     * The value is a set of instant app UIDs.
+     * UserID -> TargetAppId -> InstantAppId
+     */
+    private SparseArray<SparseArray<SparseBooleanArray>> mEphemeralGrants;
+    /** The set of all installed instant apps. UserID -> AppID */
+    private SparseArray<SparseBooleanArray> mInstalledEphemeralAppUids;
+
     public EphemeralApplicationRegistry(PackageManagerService service) {
         mService = service;
     }
@@ -189,6 +204,9 @@
 
             // Propagate permissions before removing any state
             propagateEphemeralAppPermissionsIfNeeded(pkg, userId);
+            if (pkg.applicationInfo.isEphemeralApp()) {
+                addEphemeralAppLPw(userId, ps.appId);
+            }
 
             // Remove the in-memory state
             if (mUninstalledEphemeralApps != null) {
@@ -248,9 +266,11 @@
             if (pkg.applicationInfo.isEphemeralApp()) {
                 // Add a record for an uninstalled ephemeral app
                 addUninstalledEphemeralAppLPw(pkg, userId);
+                removeEphemeralAppLPw(userId, ps.appId);
             } else {
                 // Deleting an app prunes all ephemeral state such as cookie
                 deleteDir(getEphemeralApplicationDir(pkg.packageName, userId));
+                removeAppLPw(userId, ps.appId);
             }
         }
     }
@@ -262,9 +282,114 @@
         if (mUninstalledEphemeralApps != null) {
             mUninstalledEphemeralApps.remove(userId);
         }
+        if (mInstalledEphemeralAppUids != null) {
+            mInstalledEphemeralAppUids.remove(userId);
+        }
+        if (mEphemeralGrants != null) {
+            mEphemeralGrants.remove(userId);
+        }
         deleteDir(getEphemeralApplicationsDir(userId));
     }
 
+    public boolean isEphemeralAccessGranted(int userId, int targetAppId, int ephemeralAppId) {
+        if (mEphemeralGrants == null) {
+            return false;
+        }
+        final SparseArray<SparseBooleanArray> targetAppList = mEphemeralGrants.get(userId);
+        if (targetAppList == null) {
+            return false;
+        }
+        final SparseBooleanArray ephemeralGrantList = targetAppList.get(targetAppId);
+        if (ephemeralGrantList == null) {
+            return false;
+        }
+        return ephemeralGrantList.get(ephemeralAppId);
+    }
+
+    public void grantEphemeralAccessLPw(int userId, Intent intent,
+            int targetAppId, int ephemeralAppId) {
+        if (mInstalledEphemeralAppUids == null) {
+            return;     // no ephemeral apps installed; no need to grant
+        }
+        SparseBooleanArray ephemeralAppList = mInstalledEphemeralAppUids.get(userId);
+        if (ephemeralAppList == null || !ephemeralAppList.get(ephemeralAppId)) {
+            return;     // ephemeral app id isn't installed; no need to grant
+        }
+        if (ephemeralAppList.get(targetAppId)) {
+            return;     // target app id is an ephemeral app; no need to grant
+        }
+        if (intent != null && Intent.ACTION_VIEW.equals(intent.getAction())) {
+            final Set<String> categories = intent.getCategories();
+            if (categories != null && categories.contains(Intent.CATEGORY_BROWSABLE)) {
+                return;  // launched via VIEW/BROWSABLE intent; no need to grant
+            }
+        }
+        if (mEphemeralGrants == null) {
+            mEphemeralGrants = new SparseArray<>();
+        }
+        SparseArray<SparseBooleanArray> targetAppList = mEphemeralGrants.get(userId);
+        if (targetAppList == null) {
+            targetAppList = new SparseArray<>();
+            mEphemeralGrants.put(userId, targetAppList);
+        }
+        SparseBooleanArray ephemeralGrantList = targetAppList.get(targetAppId);
+        if (ephemeralGrantList == null) {
+            ephemeralGrantList = new SparseBooleanArray();
+            targetAppList.put(targetAppId, ephemeralGrantList);
+        }
+        ephemeralGrantList.put(ephemeralAppId, true /*granted*/);
+    }
+
+    public void addEphemeralAppLPw(int userId, int ephemeralAppId) {
+        if (mInstalledEphemeralAppUids == null) {
+            mInstalledEphemeralAppUids = new SparseArray<>();
+        }
+        SparseBooleanArray ephemeralAppList = mInstalledEphemeralAppUids.get(userId);
+        if (ephemeralAppList == null) {
+            ephemeralAppList = new SparseBooleanArray();
+            mInstalledEphemeralAppUids.put(userId, ephemeralAppList);
+        }
+        ephemeralAppList.put(ephemeralAppId, true /*installed*/);
+    }
+
+    private void removeEphemeralAppLPw(int userId, int ephemeralAppId) {
+        // remove from the installed list
+        if (mInstalledEphemeralAppUids == null) {
+            return; // no ephemeral apps on the system
+        }
+        final SparseBooleanArray ephemeralAppList = mInstalledEphemeralAppUids.get(userId);
+        if (ephemeralAppList == null) {
+            Slog.w(LOG_TAG, "Remove ephemeral not in install list");
+            return;
+        } else {
+            ephemeralAppList.delete(ephemeralAppId);
+        }
+        // remove any grants
+        if (mEphemeralGrants == null) {
+            return; // no grants on the system
+        }
+        final SparseArray<SparseBooleanArray> targetAppList = mEphemeralGrants.get(userId);
+        if (targetAppList == null) {
+            return; // no grants for this user
+        }
+        final int numApps = targetAppList.size();
+        for (int i = targetAppList.size() - 1; i >= 0; --i) {
+            targetAppList.valueAt(i).delete(ephemeralAppId);
+        }
+    }
+
+    private void removeAppLPw(int userId, int targetAppId) {
+        // remove from the installed list
+        if (mEphemeralGrants == null) {
+            return; // no grants on the system
+        }
+        final SparseArray<SparseBooleanArray> targetAppList = mEphemeralGrants.get(userId);
+        if (targetAppList == null) {
+            return; // no grants for this user
+        }
+        targetAppList.delete(targetAppId);
+    }
+
     private void addUninstalledEphemeralAppLPw(PackageParser.Package pkg, int userId) {
         EphemeralApplicationInfo uninstalledApp = createEphemeralAppInfoForPackage(pkg, userId);
         if (uninstalledApp == null) {
diff --git a/services/core/java/com/android/server/pm/PackageManagerService.java b/services/core/java/com/android/server/pm/PackageManagerService.java
index 340df1a..c9b8264 100644
--- a/services/core/java/com/android/server/pm/PackageManagerService.java
+++ b/services/core/java/com/android/server/pm/PackageManagerService.java
@@ -68,6 +68,7 @@
 import static android.content.pm.PackageManager.MATCH_KNOWN_PACKAGES;
 import static android.content.pm.PackageManager.MATCH_SYSTEM_ONLY;
 import static android.content.pm.PackageManager.MATCH_UNINSTALLED_PACKAGES;
+import static android.content.pm.PackageManager.MOVE_FAILED_3RD_PARTY_NOT_ALLOWED_ON_INTERNAL;
 import static android.content.pm.PackageManager.MOVE_FAILED_DEVICE_ADMIN;
 import static android.content.pm.PackageManager.MOVE_FAILED_DOESNT_EXIST;
 import static android.content.pm.PackageManager.MOVE_FAILED_INTERNAL_ERROR;
@@ -2223,6 +2224,7 @@
             Watchdog.getInstance().addThread(mHandler, WATCHDOG_TIMEOUT);
 
             mDefaultPermissionPolicy = new DefaultPermissionGrantPolicy(this);
+            mEphemeralApplicationRegistry = new EphemeralApplicationRegistry(this);
 
             File dataDir = Environment.getDataDirectory();
             mAppInstallDir = new File(dataDir, "app");
@@ -2805,8 +2807,6 @@
                 setUpEphemeralInstallerActivityLP(mEphemeralInstallerComponent);
             }
 
-            mEphemeralApplicationRegistry = new EphemeralApplicationRegistry(this);
-
             // Read and update the usage of dex files.
             // Do this at the end of PM init so that all the packages have their
             // data directory reconciled.
@@ -3256,6 +3256,31 @@
         if (p == null) {
             return null;
         }
+        // Filter out ephemeral app metadata:
+        //   * The system/shell/root can see metadata for any app
+        //   * An installed app can see metadata for 1) other installed apps
+        //     and 2) ephemeral apps that have explicitly interacted with it
+        //   * Ephemeral apps can only see their own metadata
+        final int callingAppId = UserHandle.getAppId(Binder.getCallingUid());
+        if (callingAppId != Process.SYSTEM_UID
+                && callingAppId != Process.SHELL_UID
+                && callingAppId != Process.ROOT_UID) {
+            final String ephemeralPackageName = getEphemeralPackageName(Binder.getCallingUid());
+            if (ephemeralPackageName != null) {
+                // ephemeral apps can only get information on themselves
+                if (!ephemeralPackageName.equals(p.packageName)) {
+                    return null;
+                }
+            } else {
+                if (p.applicationInfo.isEphemeralApp()) {
+                    // only get access to the ephemeral app if we've been granted access
+                    if (!mEphemeralApplicationRegistry.isEphemeralAccessGranted(
+                            userId, callingAppId, ps.appId)) {
+                        return null;
+                    }
+                }
+            }
+        }
 
         final PermissionsState permissionsState = ps.getPermissionsState();
 
@@ -3335,22 +3360,19 @@
 
         // reader
         synchronized (mPackages) {
-            // Normalize package name to hanlde renamed packages
+            // Normalize package name to handle renamed packages
             packageName = normalizePackageNameLPr(packageName);
 
             final boolean matchFactoryOnly = (flags & MATCH_FACTORY_ONLY) != 0;
-            PackageParser.Package p = null;
             if (matchFactoryOnly) {
                 final PackageSetting ps = mSettings.getDisabledSystemPkgLPr(packageName);
                 if (ps != null) {
                     return generatePackageInfo(ps, flags, userId);
                 }
             }
-            if (p == null) {
-                p = mPackages.get(packageName);
-                if (matchFactoryOnly && p != null && !isSystemApp(p)) {
-                    return null;
-                }
+            PackageParser.Package p = mPackages.get(packageName);
+            if (matchFactoryOnly && p != null && !isSystemApp(p)) {
+                return null;
             }
             if (DEBUG_PACKAGE_INFO)
                 Log.v(TAG, "getPackageInfo " + packageName + ": " + p);
@@ -8838,6 +8860,10 @@
             // Modify state for the given package setting
             commitPackageSettings(pkg, pkgSetting, user, scanFlags,
                     (policyFlags & PackageParser.PARSE_CHATTY) != 0 /*chatty*/);
+            if (isEphemeral(pkg)) {
+                final int userId = user == null ? 0 : user.getIdentifier();
+                mEphemeralApplicationRegistry.addEphemeralAppLPw(userId, pkgSetting.appId);
+            }
         }
         return pkg;
     }
@@ -21043,6 +21069,14 @@
                         "Cannot move system application");
             }
 
+            final boolean isInternalStorage = VolumeInfo.ID_PRIVATE_INTERNAL.equals(volumeUuid);
+            final boolean allow3rdPartyOnInternal = mContext.getResources().getBoolean(
+                    com.android.internal.R.bool.config_allow3rdPartyAppOnInternal);
+            if (isInternalStorage && !allow3rdPartyOnInternal) {
+                throw new PackageManagerException(MOVE_FAILED_3RD_PARTY_NOT_ALLOWED_ON_INTERNAL,
+                        "3rd party apps are not allowed on internal storage");
+            }
+
             if (pkg.applicationInfo.isExternalAsec()) {
                 currentAsec = true;
                 currentVolumeUuid = StorageManager.UUID_PRIMARY_PHYSICAL;
@@ -21925,6 +21959,15 @@
                     responseObj, origIntent, resolvedType, launchIntent, callingPackage, userId);
         }
 
+        @Override
+        public void grantEphemeralAccess(int userId, Intent intent,
+                int targetAppId, int ephemeralAppId) {
+            synchronized (mPackages) {
+                mEphemeralApplicationRegistry.grantEphemeralAccessLPw(userId, intent,
+                        targetAppId, ephemeralAppId);
+            }
+        }
+
         public String getSetupWizardPackageName() {
             return mSetupWizardPackage;
         }
diff --git a/services/core/java/com/android/server/vr/CompatibilityDisplay.java b/services/core/java/com/android/server/vr/CompatibilityDisplay.java
new file mode 100644
index 0000000..15edaaf
--- /dev/null
+++ b/services/core/java/com/android/server/vr/CompatibilityDisplay.java
@@ -0,0 +1,119 @@
+
+package com.android.server.vr;
+
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.hardware.display.DisplayManager;
+import android.hardware.display.VirtualDisplay;
+import android.os.Build;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.service.vr.IVrStateCallbacks;
+import android.service.vr.IVrManager;
+import android.util.Log;
+
+import com.android.server.vr.VrManagerService;
+
+/**
+ * Creates a 2D Virtual Display while VR Mode is enabled. This display will be used to run and
+ * render 2D app within a VR experience. For example, bringing up the 2D calculator app in VR.
+ */
+class CompatibilityDisplay {
+    private final static String TAG = "CompatDisplay";
+    private final static boolean DEBUG = false;
+
+    // TODO: Go over these values and figure out what is best
+    private final static int HEIGHT = 960;
+    private final static int WIDTH = 720;
+    private final static int DPI = 320;
+
+    private final DisplayManager mDisplayManager;
+    private final IVrManager mVrManager;
+
+    // TODO: Lock initially created when VrStateCallback was connected through Binder. This may not
+    // be necessary with the direct access to VrManager.
+    private final Object vdLock = new Object();
+
+    private final IVrStateCallbacks mVrStateCallbacks = new IVrStateCallbacks.Stub() {
+        @Override
+        public void onVrStateChanged(boolean enabled) {
+            if (enabled != mIsVrModeEnabled) {
+                mIsVrModeEnabled = enabled;
+                if (enabled) {
+                    // TODO: Consider not creating the display until ActivityManager needs one on
+                    // which to display a 2D application.
+                    startVirtualDisplay();
+                } else {
+                    stopVirtualDisplay();
+                }
+            }
+        }
+    };
+
+    private VirtualDisplay mVirtualDisplay;
+    private boolean mIsVrModeEnabled;
+
+    public CompatibilityDisplay(DisplayManager displayManager, IVrManager vrManager) {
+        mDisplayManager = displayManager;
+        mVrManager = vrManager;
+    }
+
+    /**
+     * Initializes the compabilitiy display by listening to VR mode changes.
+     */
+    public void init() {
+        startVrModeListener();
+    }
+
+    private void startVrModeListener() {
+        if (mVrManager != null) {
+            try {
+                mVrManager.registerListener(mVrStateCallbacks);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Could not register VR State listener.", e);
+            }
+        }
+    }
+
+    private void startVirtualDisplay() {
+        if (DEBUG) {
+            Log.d(TAG, "Starting VD, DM:" + mDisplayManager);
+        }
+
+        if (mDisplayManager == null) {
+            Log.w(TAG, "Cannot create virtual display because mDisplayManager == null");
+            return;
+        }
+
+        synchronized (vdLock) {
+            if (mVirtualDisplay != null) {
+                Log.e(TAG, "Starting the virtual display when one already exists", new Exception());
+                return;
+            }
+
+            mVirtualDisplay = mDisplayManager.createVirtualDisplay("VR 2D Display", WIDTH, HEIGHT,
+                    DPI,
+                    null /* Surface */, 0 /* flags */);
+        }
+
+        if (DEBUG) {
+            Log.d(TAG, "VD created: " + mVirtualDisplay);
+        }
+    }
+
+    private void stopVirtualDisplay() {
+        if (DEBUG) {
+            Log.i(TAG, "Santos, stopping VD");
+        }
+
+        synchronized (vdLock) {
+            if (mVirtualDisplay != null) {
+                mVirtualDisplay.release();
+                mVirtualDisplay = null;
+            }
+        }
+    }
+}
diff --git a/services/core/java/com/android/server/vr/VrManagerService.java b/services/core/java/com/android/server/vr/VrManagerService.java
index 84cf0c6..57587b0 100644
--- a/services/core/java/com/android/server/vr/VrManagerService.java
+++ b/services/core/java/com/android/server/vr/VrManagerService.java
@@ -31,6 +31,7 @@
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
+import android.hardware.display.DisplayManager;
 import android.os.Binder;
 import android.os.Handler;
 import android.os.IBinder;
@@ -51,6 +52,7 @@
 import android.util.ArraySet;
 import android.util.Slog;
 import android.util.SparseArray;
+
 import com.android.internal.R;
 import com.android.server.LocalServices;
 import com.android.server.SystemConfig;
@@ -136,6 +138,7 @@
     private final NotificationAccessManager mNotifAccessManager = new NotificationAccessManager();
     /** Tracks the state of the screen and keyguard UI.*/
     private int mSystemSleepFlags = FLAG_NONE;
+    private CompatibilityDisplay mCompatibilityDisplay;
 
     private static final int MSG_VR_STATE_CHANGE = 0;
     private static final int MSG_PENDING_VR_STATE_CHANGE = 1;
@@ -493,6 +496,11 @@
 
                 mComponentObserver.rebuildAll();
             }
+
+            DisplayManager dm =
+                    (DisplayManager) getContext().getSystemService(Context.DISPLAY_SERVICE);
+            mCompatibilityDisplay = new CompatibilityDisplay(dm, mVrManager);
+            mCompatibilityDisplay.init();
         } else if (phase == SystemService.PHASE_THIRD_PARTY_APPS_CAN_START) {
             synchronized (mLock) {
                 mVrModeAllowed = true;
diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 288c9ab..c0a86d6 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -878,39 +878,6 @@
      public static final String KEY_CARRIER_SETUP_APP_STRING = "carrier_setup_app_string";
 
     /**
-     * A list of component name of carrier signalling receivers which are interested in intent
-     * android.intent.action.CARRIER_SIGNAL_REDIRECTED.
-     * Example:
-     * <item>com.google.android.carrierPackageName/.CarrierSignalReceiverNameA</item>
-     * <item>com.google.android.carrierPackageName/.CarrierSignalReceiverNameB</item>
-     * @hide
-     */
-    public static final String KEY_SIGNAL_REDIRECTION_RECEIVER_STRING_ARRAY =
-            "signal_redirection_receiver_string_array";
-
-    /**
-     * A list of component name of carrier signalling receivers which are interested in intent
-     * android.intent.action.CARRIER_SIGNAL_REQUEST_NETWORK_FAILED.
-     * Example:
-     * <item>com.google.android.carrierPackageName/.CarrierSignalReceiverNameA</item>
-     * <item>com.google.android.carrierPackageName/.CarrierSignalReceiverNameB</item>
-     * @hide
-     */
-    public static final String KEY_SIGNAL_DCFAILURE_RECEIVER_STRING_ARRAY =
-            "signal_dcfailure_receiver_string_array";
-
-    /**
-     * A list of component name of carrier signalling receivers which are interested in intent
-     * android.intent.action.CARRIER_SIGNAL_PCO_VALUE.
-     * Example:
-     * <item>com.google.android.carrierPackageName/.CarrierSignalReceiverNameA</item>
-     * <item>com.google.android.carrierPackageName/.CarrierSignalReceiverNameB</item>
-     * @hide
-     */
-    public static final String KEY_SIGNAL_PCO_RECEIVER_STRING_ARRAY =
-            "signal_pco_receiver_string_array";
-
-    /**
      * Defines carrier-specific actions which act upon
      * android.intent.action.CARRIER_SIGNAL_REDIRECTED, used for customization of the
      * default carrier app
@@ -963,6 +930,42 @@
             "carrier_default_redirection_url_string_array";
 
     /**
+     * Each config includes the componentName of the carrier app, followed by a list of interesting
+     * signals(declared in the manifest) which could wake up the app.
+     * @see com.android.internal.telephony.TelephonyIntents
+     * Example:
+     * <item>com.google.android.carrierAPK/.CarrierSignalReceiverA:
+     * android.intent.action.CARRIER_SIGNAL_REDIRECTED,
+     * android.intent.action.CARRIER_SIGNAL_PCO_VALUE
+     * </item>
+     * <item>com.google.android.carrierAPK/.CarrierSignalReceiverB:
+     * android.intent.action.CARRIER_SIGNAL_PCO_VALUE
+     * </item>
+     * @hide
+     */
+    public static final String KEY_CARRIER_APP_WAKE_SIGNAL_CONFIG_STRING_ARRAY =
+            "carrier_app_wake_signal_config";
+
+    /**
+     * Each config includes the componentName of the carrier app, followed by a list of interesting
+     * signals for the app during run-time. The list of signals(intents) are targeting on run-time
+     * broadcast receivers only, aiming to avoid unnecessary wake-ups and should not be declared in
+     * the app's manifest.
+     * @see com.android.internal.telephony.TelephonyIntents
+     * Example:
+     * <item>com.google.android.carrierAPK/.CarrierSignalReceiverA:
+     * android.intent.action.CARRIER_SIGNAL_REQUEST_NETWORK_FAILED,
+     * android.intent.action.CARRIER_SIGNAL_PCO_VALUE
+     * </item>
+     * <item>com.google.android.carrierAPK/.CarrierSignalReceiverB:
+     * android.intent.action.CARRIER_SIGNAL_REQUEST_NETWORK_FAILED
+     * </item>
+     * @hide
+     */
+    public static final String KEY_CARRIER_APP_NO_WAKE_SIGNAL_CONFIG_STRING_ARRAY =
+            "carrier_app_no_wake_signal_config";
+
+    /**
      * Determines whether the carrier supports making non-emergency phone calls while the phone is
      * in emergency callback mode.  Default value is {@code true}, meaning that non-emergency calls
      * are allowed in emergency callback mode.
@@ -1413,10 +1416,14 @@
         sDefaults.putString(KEY_RCS_CONFIG_SERVER_URL_STRING, "");
 
         // Carrier Signalling Receivers
-        sDefaults.putStringArray(KEY_SIGNAL_REDIRECTION_RECEIVER_STRING_ARRAY, null);
-        sDefaults.putStringArray(KEY_SIGNAL_DCFAILURE_RECEIVER_STRING_ARRAY, null);
-        sDefaults.putStringArray(KEY_SIGNAL_PCO_RECEIVER_STRING_ARRAY, null);
         sDefaults.putString(KEY_CARRIER_SETUP_APP_STRING, "");
+        sDefaults.putStringArray(KEY_CARRIER_APP_WAKE_SIGNAL_CONFIG_STRING_ARRAY,
+                new String[]{
+                        "com.android.carrierdefaultapp/.CarrierDefaultBroadcastReceiver:" +
+                                "android.intent.action.CARRIER_SIGNAL_REDIRECTED"
+                });
+        sDefaults.putStringArray(KEY_CARRIER_APP_NO_WAKE_SIGNAL_CONFIG_STRING_ARRAY, null);
+
 
         // Default carrier app configurations
         sDefaults.putStringArray(KEY_CARRIER_DEFAULT_ACTIONS_ON_REDIRECTION_STRING_ARRAY,
diff --git a/tools/aapt2/ConfigDescription.cpp b/tools/aapt2/ConfigDescription.cpp
index b1bd401..c97d6d4 100644
--- a/tools/aapt2/ConfigDescription.cpp
+++ b/tools/aapt2/ConfigDescription.cpp
@@ -20,15 +20,16 @@
 #include <vector>
 
 #include "androidfw/ResourceTypes.h"
+#include "androidfw/StringPiece.h"
 
 #include "Locale.h"
 #include "SdkConstants.h"
-#include "util/StringPiece.h"
 #include "util/Util.h"
 
-namespace aapt {
-
 using android::ResTable_config;
+using android::StringPiece;
+
+namespace aapt {
 
 static const char* kWildcardName = "any";
 
diff --git a/tools/aapt2/ConfigDescription.h b/tools/aapt2/ConfigDescription.h
index 97d0f38..65c9617 100644
--- a/tools/aapt2/ConfigDescription.h
+++ b/tools/aapt2/ConfigDescription.h
@@ -20,8 +20,7 @@
 #include <ostream>
 
 #include "androidfw/ResourceTypes.h"
-
-#include "util/StringPiece.h"
+#include "androidfw/StringPiece.h"
 
 namespace aapt {
 
@@ -42,7 +41,7 @@
    * The resulting configuration has the appropriate sdkVersion defined
    * for backwards compatibility.
    */
-  static bool Parse(const StringPiece& str, ConfigDescription* out = nullptr);
+  static bool Parse(const android::StringPiece& str, ConfigDescription* out = nullptr);
 
   /**
    * If the configuration uses an axis that was added after
diff --git a/tools/aapt2/ConfigDescription_test.cpp b/tools/aapt2/ConfigDescription_test.cpp
index 1d22ce0..7933568 100644
--- a/tools/aapt2/ConfigDescription_test.cpp
+++ b/tools/aapt2/ConfigDescription_test.cpp
@@ -18,9 +18,12 @@
 
 #include <string>
 
+#include "androidfw/StringPiece.h"
+
 #include "SdkConstants.h"
 #include "test/Test.h"
-#include "util/StringPiece.h"
+
+using android::StringPiece;
 
 namespace aapt {
 
diff --git a/tools/aapt2/Diagnostics.h b/tools/aapt2/Diagnostics.h
index 5bc86a9..50e8b33 100644
--- a/tools/aapt2/Diagnostics.h
+++ b/tools/aapt2/Diagnostics.h
@@ -22,9 +22,9 @@
 #include <string>
 
 #include "android-base/macros.h"
+#include "androidfw/StringPiece.h"
 
 #include "Source.h"
-#include "util/StringPiece.h"
 #include "util/Util.h"
 
 namespace aapt {
@@ -38,7 +38,7 @@
  public:
   DiagMessage() = default;
 
-  explicit DiagMessage(const StringPiece& src) : source_(src) {}
+  explicit DiagMessage(const android::StringPiece& src) : source_(src) {}
 
   explicit DiagMessage(const Source& src) : source_(src) {}
 
@@ -59,6 +59,12 @@
   std::stringstream message_;
 };
 
+template <>
+inline DiagMessage& DiagMessage::operator<<(const ::std::u16string& value) {
+  message_ << android::StringPiece16(value);
+  return *this;
+}
+
 struct IDiagnostics {
   virtual ~IDiagnostics() = default;
 
diff --git a/tools/aapt2/Flags.cpp b/tools/aapt2/Flags.cpp
index c98cd37..84977ab 100644
--- a/tools/aapt2/Flags.cpp
+++ b/tools/aapt2/Flags.cpp
@@ -21,20 +21,22 @@
 #include <string>
 #include <vector>
 
-#include "util/StringPiece.h"
+#include "androidfw/StringPiece.h"
+
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 Flags& Flags::RequiredFlag(const StringPiece& name,
                            const StringPiece& description, std::string* value) {
   auto func = [value](const StringPiece& arg) -> bool {
-    *value = arg.ToString();
+    *value = arg.to_string();
     return true;
   };
 
-  flags_.push_back(
-      Flag{name.ToString(), description.ToString(), func, true, 1, false});
+  flags_.push_back(Flag{name.to_string(), description.to_string(), func, true, 1, false});
   return *this;
 }
 
@@ -42,12 +44,11 @@
                                const StringPiece& description,
                                std::vector<std::string>* value) {
   auto func = [value](const StringPiece& arg) -> bool {
-    value->push_back(arg.ToString());
+    value->push_back(arg.to_string());
     return true;
   };
 
-  flags_.push_back(
-      Flag{name.ToString(), description.ToString(), func, true, 1, false});
+  flags_.push_back(Flag{name.to_string(), description.to_string(), func, true, 1, false});
   return *this;
 }
 
@@ -55,12 +56,11 @@
                            const StringPiece& description,
                            Maybe<std::string>* value) {
   auto func = [value](const StringPiece& arg) -> bool {
-    *value = arg.ToString();
+    *value = arg.to_string();
     return true;
   };
 
-  flags_.push_back(
-      Flag{name.ToString(), description.ToString(), func, false, 1, false});
+  flags_.push_back(Flag{name.to_string(), description.to_string(), func, false, 1, false});
   return *this;
 }
 
@@ -68,12 +68,11 @@
                                const StringPiece& description,
                                std::vector<std::string>* value) {
   auto func = [value](const StringPiece& arg) -> bool {
-    value->push_back(arg.ToString());
+    value->push_back(arg.to_string());
     return true;
   };
 
-  flags_.push_back(
-      Flag{name.ToString(), description.ToString(), func, false, 1, false});
+  flags_.push_back(Flag{name.to_string(), description.to_string(), func, false, 1, false});
   return *this;
 }
 
@@ -81,12 +80,11 @@
                                const StringPiece& description,
                                std::unordered_set<std::string>* value) {
   auto func = [value](const StringPiece& arg) -> bool {
-    value->insert(arg.ToString());
+    value->insert(arg.to_string());
     return true;
   };
 
-  flags_.push_back(
-      Flag{name.ToString(), description.ToString(), func, false, 1, false});
+  flags_.push_back(Flag{name.to_string(), description.to_string(), func, false, 1, false});
   return *this;
 }
 
@@ -97,8 +95,7 @@
     return true;
   };
 
-  flags_.push_back(
-      Flag{name.ToString(), description.ToString(), func, false, 0, false});
+  flags_.push_back(Flag{name.to_string(), description.to_string(), func, false, 0, false});
   return *this;
 }
 
@@ -141,7 +138,7 @@
   for (size_t i = 0; i < args.size(); i++) {
     StringPiece arg = args[i];
     if (*(arg.data()) != '-') {
-      args_.push_back(arg.ToString());
+      args_.push_back(arg.to_string());
       continue;
     }
 
diff --git a/tools/aapt2/Flags.h b/tools/aapt2/Flags.h
index 9feff6b..3b3ae71 100644
--- a/tools/aapt2/Flags.h
+++ b/tools/aapt2/Flags.h
@@ -23,32 +23,30 @@
 #include <unordered_set>
 #include <vector>
 
+#include "androidfw/StringPiece.h"
+
 #include "util/Maybe.h"
-#include "util/StringPiece.h"
 
 namespace aapt {
 
 class Flags {
  public:
-  Flags& RequiredFlag(const StringPiece& name, const StringPiece& description,
+  Flags& RequiredFlag(const android::StringPiece& name, const android::StringPiece& description,
                       std::string* value);
-  Flags& RequiredFlagList(const StringPiece& name,
-                          const StringPiece& description,
+  Flags& RequiredFlagList(const android::StringPiece& name, const android::StringPiece& description,
                           std::vector<std::string>* value);
-  Flags& OptionalFlag(const StringPiece& name, const StringPiece& description,
+  Flags& OptionalFlag(const android::StringPiece& name, const android::StringPiece& description,
                       Maybe<std::string>* value);
-  Flags& OptionalFlagList(const StringPiece& name,
-                          const StringPiece& description,
+  Flags& OptionalFlagList(const android::StringPiece& name, const android::StringPiece& description,
                           std::vector<std::string>* value);
-  Flags& OptionalFlagList(const StringPiece& name,
-                          const StringPiece& description,
+  Flags& OptionalFlagList(const android::StringPiece& name, const android::StringPiece& description,
                           std::unordered_set<std::string>* value);
-  Flags& OptionalSwitch(const StringPiece& name, const StringPiece& description,
+  Flags& OptionalSwitch(const android::StringPiece& name, const android::StringPiece& description,
                         bool* value);
 
-  void Usage(const StringPiece& command, std::ostream* out);
+  void Usage(const android::StringPiece& command, std::ostream* out);
 
-  bool Parse(const StringPiece& command, const std::vector<StringPiece>& args,
+  bool Parse(const android::StringPiece& command, const std::vector<android::StringPiece>& args,
              std::ostream* outError);
 
   const std::vector<std::string>& GetArgs();
@@ -57,7 +55,7 @@
   struct Flag {
     std::string name;
     std::string description;
-    std::function<bool(const StringPiece& value)> action;
+    std::function<bool(const android::StringPiece& value)> action;
     bool required;
     size_t num_args;
 
diff --git a/tools/aapt2/Locale.cpp b/tools/aapt2/Locale.cpp
index 78f56c7a..7664fac 100644
--- a/tools/aapt2/Locale.cpp
+++ b/tools/aapt2/Locale.cpp
@@ -72,7 +72,7 @@
   return std::all_of(std::begin(str), std::end(str), ::isdigit);
 }
 
-bool LocaleValue::InitFromFilterString(const StringPiece& str) {
+bool LocaleValue::InitFromFilterString(const android::StringPiece& str) {
   // A locale (as specified in the filter) is an underscore separated name such
   // as "en_US", "en_Latn_US", or "en_US_POSIX".
   std::vector<std::string> parts = util::SplitAndLowercase(str, '_');
diff --git a/tools/aapt2/Locale.h b/tools/aapt2/Locale.h
index fc6c448..3d73b2e 100644
--- a/tools/aapt2/Locale.h
+++ b/tools/aapt2/Locale.h
@@ -21,8 +21,7 @@
 #include <vector>
 
 #include "androidfw/ResourceTypes.h"
-
-#include "util/StringPiece.h"
+#include "androidfw/StringPiece.h"
 
 namespace aapt {
 
@@ -40,7 +39,7 @@
   /**
    * Initialize this LocaleValue from a config string.
    */
-  bool InitFromFilterString(const StringPiece& config);
+  bool InitFromFilterString(const android::StringPiece& config);
 
   /**
    * Initialize this LocaleValue from parts of a vector.
diff --git a/tools/aapt2/Main.cpp b/tools/aapt2/Main.cpp
index a2b216d..74d4019 100644
--- a/tools/aapt2/Main.cpp
+++ b/tools/aapt2/Main.cpp
@@ -17,7 +17,7 @@
 #include <iostream>
 #include <vector>
 
-#include "util/StringPiece.h"
+#include "androidfw/StringPiece.h"
 
 namespace aapt {
 
@@ -33,10 +33,10 @@
   return 0;
 }
 
-extern int Compile(const std::vector<StringPiece>& args);
-extern int Link(const std::vector<StringPiece>& args);
-extern int Dump(const std::vector<StringPiece>& args);
-extern int Diff(const std::vector<StringPiece>& args);
+extern int Compile(const std::vector<android::StringPiece>& args);
+extern int Link(const std::vector<android::StringPiece>& args);
+extern int Dump(const std::vector<android::StringPiece>& args);
+extern int Diff(const std::vector<android::StringPiece>& args);
 
 }  // namespace aapt
 
@@ -45,12 +45,12 @@
     argv += 1;
     argc -= 1;
 
-    std::vector<aapt::StringPiece> args;
+    std::vector<android::StringPiece> args;
     for (int i = 1; i < argc; i++) {
       args.push_back(argv[i]);
     }
 
-    aapt::StringPiece command(argv[0]);
+    android::StringPiece command(argv[0]);
     if (command == "compile" || command == "c") {
       return aapt::Compile(args);
     } else if (command == "link" || command == "l") {
diff --git a/tools/aapt2/Resource.cpp b/tools/aapt2/Resource.cpp
index 3eef7aa7..fdabce1 100644
--- a/tools/aapt2/Resource.cpp
+++ b/tools/aapt2/Resource.cpp
@@ -19,6 +19,8 @@
 #include <map>
 #include <string>
 
+using android::StringPiece;
+
 namespace aapt {
 
 StringPiece ToString(ResourceType type) {
diff --git a/tools/aapt2/Resource.h b/tools/aapt2/Resource.h
index 13330b5..1950ea3 100644
--- a/tools/aapt2/Resource.h
+++ b/tools/aapt2/Resource.h
@@ -24,11 +24,11 @@
 #include <tuple>
 #include <vector>
 
+#include "androidfw/StringPiece.h"
 #include "utils/JenkinsHash.h"
 
 #include "ConfigDescription.h"
 #include "Source.h"
-#include "util/StringPiece.h"
 
 namespace aapt {
 
@@ -63,13 +63,13 @@
   kXml,
 };
 
-StringPiece ToString(ResourceType type);
+android::StringPiece ToString(ResourceType type);
 
 /**
  * Returns a pointer to a valid ResourceType, or nullptr if
  * the string was invalid.
  */
-const ResourceType* ParseResourceType(const StringPiece& str);
+const ResourceType* ParseResourceType(const android::StringPiece& str);
 
 /**
  * A resource's name. This can uniquely identify
@@ -81,7 +81,7 @@
   std::string entry;
 
   ResourceName() = default;
-  ResourceName(const StringPiece& p, ResourceType t, const StringPiece& e);
+  ResourceName(const android::StringPiece& p, ResourceType t, const android::StringPiece& e);
 
   int compare(const ResourceName& other) const;
 
@@ -96,15 +96,15 @@
  * of the original string.
  */
 struct ResourceNameRef {
-  StringPiece package;
+  android::StringPiece package;
   ResourceType type = ResourceType::kRaw;
-  StringPiece entry;
+  android::StringPiece entry;
 
   ResourceNameRef() = default;
   ResourceNameRef(const ResourceNameRef&) = default;
   ResourceNameRef(ResourceNameRef&&) = default;
   ResourceNameRef(const ResourceName& rhs);  // NOLINT(implicit)
-  ResourceNameRef(const StringPiece& p, ResourceType t, const StringPiece& e);
+  ResourceNameRef(const android::StringPiece& p, ResourceType t, const android::StringPiece& e);
   ResourceNameRef& operator=(const ResourceNameRef& rhs) = default;
   ResourceNameRef& operator=(ResourceNameRef&& rhs) = default;
   ResourceNameRef& operator=(const ResourceName& rhs);
@@ -258,9 +258,9 @@
 // ResourceName implementation.
 //
 
-inline ResourceName::ResourceName(const StringPiece& p, ResourceType t,
-                                  const StringPiece& e)
-    : package(p.ToString()), type(t), entry(e.ToString()) {}
+inline ResourceName::ResourceName(const android::StringPiece& p, ResourceType t,
+                                  const android::StringPiece& e)
+    : package(p.to_string()), type(t), entry(e.to_string()) {}
 
 inline int ResourceName::compare(const ResourceName& other) const {
   int cmp = package.compare(other.package);
@@ -311,8 +311,8 @@
 inline ResourceNameRef::ResourceNameRef(const ResourceName& rhs)
     : package(rhs.package), type(rhs.type), entry(rhs.entry) {}
 
-inline ResourceNameRef::ResourceNameRef(const StringPiece& p, ResourceType t,
-                                        const StringPiece& e)
+inline ResourceNameRef::ResourceNameRef(const android::StringPiece& p, ResourceType t,
+                                        const android::StringPiece& e)
     : package(p), type(t), entry(e) {}
 
 inline ResourceNameRef& ResourceNameRef::operator=(const ResourceName& rhs) {
diff --git a/tools/aapt2/ResourceParser.cpp b/tools/aapt2/ResourceParser.cpp
index b16def4..79379fe 100644
--- a/tools/aapt2/ResourceParser.cpp
+++ b/tools/aapt2/ResourceParser.cpp
@@ -29,6 +29,8 @@
 #include "util/Util.h"
 #include "xml/XmlPullParser.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 constexpr const char* sXliffNamespaceUri =
@@ -101,7 +103,7 @@
   StringPiece trimmed_comment = util::TrimWhitespace(res->comment);
   if (trimmed_comment.size() != res->comment.size()) {
     // Only if there was a change do we re-assign.
-    res->comment = trimmed_comment.ToString();
+    res->comment = trimmed_comment.to_string();
   }
 
   if (res->symbol_state) {
@@ -297,7 +299,7 @@
     // Extract the product name if it exists.
     if (Maybe<StringPiece> maybe_product =
             xml::FindNonEmptyAttribute(parser, "product")) {
-      parsed_resource.product = maybe_product.value().ToString();
+      parsed_resource.product = maybe_product.value().to_string();
     }
 
     // Parse the resource regardless of product.
@@ -383,7 +385,7 @@
     // Items have their type encoded in the type attribute.
     if (Maybe<StringPiece> maybe_type =
             xml::FindNonEmptyAttribute(parser, "type")) {
-      resource_type = maybe_type.value().ToString();
+      resource_type = maybe_type.value().to_string();
     } else {
       diag_->Error(DiagMessage(source_.WithLine(parser->line_number()))
                    << "<item> must have a 'type' attribute");
@@ -419,7 +421,7 @@
     }
 
     out_resource->name.type = ResourceType::kId;
-    out_resource->name.entry = maybe_name.value().ToString();
+    out_resource->name.entry = maybe_name.value().to_string();
     out_resource->value = util::make_unique<Id>();
     return true;
   }
@@ -436,7 +438,7 @@
     }
 
     out_resource->name.type = item_iter->second.type;
-    out_resource->name.entry = maybe_name.value().ToString();
+    out_resource->name.entry = maybe_name.value().to_string();
 
     // Only use the implicit format for this type if it wasn't overridden.
     if (!resource_format) {
@@ -461,7 +463,7 @@
         return false;
       }
 
-      out_resource->name.entry = maybe_name.value().ToString();
+      out_resource->name.entry = maybe_name.value().to_string();
     }
 
     // Call the associated parse method. The type will be filled in by the
@@ -484,7 +486,7 @@
     }
 
     out_resource->name.type = *parsed_type;
-    out_resource->name.entry = maybe_name.value().ToString();
+    out_resource->name.entry = maybe_name.value().to_string();
     out_resource->value =
         ParseXml(parser, android::ResTable_map::TYPE_REFERENCE, kNoRawString);
     if (!out_resource->value) {
@@ -718,7 +720,7 @@
   const size_t depth = parser->depth();
   while (xml::XmlPullParser::NextChildNode(parser, depth)) {
     if (parser->event() == xml::XmlPullParser::Event::kComment) {
-      comment = util::TrimWhitespace(parser->comment()).ToString();
+      comment = util::TrimWhitespace(parser->comment()).to_string();
       continue;
     } else if (parser->event() != xml::XmlPullParser::Event::kStartElement) {
       // Skip text.
@@ -754,7 +756,7 @@
 
       ParsedResource child_resource;
       child_resource.name.type = *parsed_type;
-      child_resource.name.entry = maybe_name.value().ToString();
+      child_resource.name.entry = maybe_name.value().to_string();
       child_resource.id = next_id;
       child_resource.comment = std::move(comment);
       child_resource.source = item_source;
@@ -899,7 +901,7 @@
   const size_t depth = parser->depth();
   while (xml::XmlPullParser::NextChildNode(parser, depth)) {
     if (parser->event() == xml::XmlPullParser::Event::kComment) {
-      comment = util::TrimWhitespace(parser->comment()).ToString();
+      comment = util::TrimWhitespace(parser->comment()).to_string();
       continue;
     } else if (parser->event() != xml::XmlPullParser::Event::kStartElement) {
       // Skip text.
@@ -1288,7 +1290,7 @@
   const size_t depth = parser->depth();
   while (xml::XmlPullParser::NextChildNode(parser, depth)) {
     if (parser->event() == xml::XmlPullParser::Event::kComment) {
-      comment = util::TrimWhitespace(parser->comment()).ToString();
+      comment = util::TrimWhitespace(parser->comment()).to_string();
       continue;
     } else if (parser->event() != xml::XmlPullParser::Event::kStartElement) {
       // Ignore text.
diff --git a/tools/aapt2/ResourceParser.h b/tools/aapt2/ResourceParser.h
index 11b1e5b..c12dacf 100644
--- a/tools/aapt2/ResourceParser.h
+++ b/tools/aapt2/ResourceParser.h
@@ -20,6 +20,7 @@
 #include <memory>
 
 #include "android-base/macros.h"
+#include "androidfw/StringPiece.h"
 
 #include "ConfigDescription.h"
 #include "Diagnostics.h"
@@ -27,7 +28,6 @@
 #include "ResourceValues.h"
 #include "StringPool.h"
 #include "util/Maybe.h"
-#include "util/StringPiece.h"
 #include "xml/XmlPullParser.h"
 
 namespace aapt {
@@ -101,7 +101,7 @@
   bool ParseAttrImpl(xml::XmlPullParser* parser, ParsedResource* out_resource,
                      bool weak);
   Maybe<Attribute::Symbol> ParseEnumOrFlagItem(xml::XmlPullParser* parser,
-                                               const StringPiece& tag);
+                                               const android::StringPiece& tag);
   bool ParseStyle(xml::XmlPullParser* parser, ParsedResource* out_resource);
   bool ParseStyleItem(xml::XmlPullParser* parser, Style* style);
   bool ParseDeclareStyleable(xml::XmlPullParser* parser,
diff --git a/tools/aapt2/ResourceParser_test.cpp b/tools/aapt2/ResourceParser_test.cpp
index 2463911..5762fb0 100644
--- a/tools/aapt2/ResourceParser_test.cpp
+++ b/tools/aapt2/ResourceParser_test.cpp
@@ -25,6 +25,8 @@
 #include "test/Test.h"
 #include "xml/XmlPullParser.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 constexpr const char* kXmlPreamble =
diff --git a/tools/aapt2/ResourceTable.cpp b/tools/aapt2/ResourceTable.cpp
index 4e6a50a..dd78750 100644
--- a/tools/aapt2/ResourceTable.cpp
+++ b/tools/aapt2/ResourceTable.cpp
@@ -28,6 +28,8 @@
 #include <string>
 #include <tuple>
 
+using android::StringPiece;
+
 namespace aapt {
 
 static bool less_than_type(const std::unique_ptr<ResourceTableType>& lhs,
@@ -87,7 +89,7 @@
 
   std::unique_ptr<ResourceTablePackage> new_package =
       util::make_unique<ResourceTablePackage>();
-  new_package->name = name.ToString();
+  new_package->name = name.to_string();
   return packages.emplace(iter, std::move(new_package))->get();
 }
 
diff --git a/tools/aapt2/ResourceTable.h b/tools/aapt2/ResourceTable.h
index a0c3217..0fe966c 100644
--- a/tools/aapt2/ResourceTable.h
+++ b/tools/aapt2/ResourceTable.h
@@ -25,7 +25,9 @@
 #include "StringPool.h"
 #include "io/File.h"
 
-#include <android-base/macros.h>
+#include "android-base/macros.h"
+#include "androidfw/StringPiece.h"
+
 #include <functional>
 #include <map>
 #include <memory>
@@ -68,9 +70,8 @@
    */
   std::unique_ptr<Value> value;
 
-  ResourceConfigValue(const ConfigDescription& config,
-                      const StringPiece& product)
-      : config(config), product(product.ToString()) {}
+  ResourceConfigValue(const ConfigDescription& config, const android::StringPiece& product)
+      : config(config), product(product.to_string()) {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ResourceConfigValue);
@@ -105,13 +106,13 @@
    */
   std::vector<std::unique_ptr<ResourceConfigValue>> values;
 
-  explicit ResourceEntry(const StringPiece& name) : name(name.ToString()) {}
+  explicit ResourceEntry(const android::StringPiece& name) : name(name.to_string()) {}
 
   ResourceConfigValue* FindValue(const ConfigDescription& config);
   ResourceConfigValue* FindValue(const ConfigDescription& config,
-                                 const StringPiece& product);
+                                 const android::StringPiece& product);
   ResourceConfigValue* FindOrCreateValue(const ConfigDescription& config,
-                                         const StringPiece& product);
+                                         const android::StringPiece& product);
   std::vector<ResourceConfigValue*> findAllValues(
       const ConfigDescription& config);
   std::vector<ResourceConfigValue*> FindValuesIf(
@@ -150,8 +151,8 @@
 
   explicit ResourceTableType(const ResourceType type) : type(type) {}
 
-  ResourceEntry* FindEntry(const StringPiece& name);
-  ResourceEntry* FindOrCreateEntry(const StringPiece& name);
+  ResourceEntry* FindEntry(const android::StringPiece& name);
+  ResourceEntry* FindOrCreateEntry(const android::StringPiece& name);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ResourceTableType);
@@ -195,22 +196,19 @@
                                                Value* incoming);
 
   bool AddResource(const ResourceNameRef& name, const ConfigDescription& config,
-                   const StringPiece& product, std::unique_ptr<Value> value,
+                   const android::StringPiece& product, std::unique_ptr<Value> value,
                    IDiagnostics* diag);
 
   bool AddResource(const ResourceNameRef& name, const ResourceId& res_id,
-                   const ConfigDescription& config, const StringPiece& product,
+                   const ConfigDescription& config, const android::StringPiece& product,
                    std::unique_ptr<Value> value, IDiagnostics* diag);
 
-  bool AddFileReference(const ResourceNameRef& name,
-                        const ConfigDescription& config, const Source& source,
-                        const StringPiece& path, IDiagnostics* diag);
+  bool AddFileReference(const ResourceNameRef& name, const ConfigDescription& config,
+                        const Source& source, const android::StringPiece& path, IDiagnostics* diag);
 
-  bool AddFileReferenceAllowMangled(const ResourceNameRef& name,
-                                    const ConfigDescription& config,
-                                    const Source& source,
-                                    const StringPiece& path, io::IFile* file,
-                                    IDiagnostics* diag);
+  bool AddFileReferenceAllowMangled(const ResourceNameRef& name, const ConfigDescription& config,
+                                    const Source& source, const android::StringPiece& path,
+                                    io::IFile* file, IDiagnostics* diag);
 
   /**
    * Same as AddResource, but doesn't verify the validity of the name. This is
@@ -219,18 +217,13 @@
    * mangled
    * names.
    */
-  bool AddResourceAllowMangled(const ResourceNameRef& name,
-                               const ConfigDescription& config,
-                               const StringPiece& product,
-                               std::unique_ptr<Value> value,
+  bool AddResourceAllowMangled(const ResourceNameRef& name, const ConfigDescription& config,
+                               const android::StringPiece& product, std::unique_ptr<Value> value,
                                IDiagnostics* diag);
 
-  bool AddResourceAllowMangled(const ResourceNameRef& name,
-                               const ResourceId& id,
-                               const ConfigDescription& config,
-                               const StringPiece& product,
-                               std::unique_ptr<Value> value,
-                               IDiagnostics* diag);
+  bool AddResourceAllowMangled(const ResourceNameRef& name, const ResourceId& id,
+                               const ConfigDescription& config, const android::StringPiece& product,
+                               std::unique_ptr<Value> value, IDiagnostics* diag);
 
   bool SetSymbolState(const ResourceNameRef& name, const ResourceId& res_id,
                       const Symbol& symbol, IDiagnostics* diag);
@@ -273,28 +266,23 @@
    * represent the
    * 'current' package before it is known to the ResourceTable.
    */
-  ResourceTablePackage* FindPackage(const StringPiece& name);
+  ResourceTablePackage* FindPackage(const android::StringPiece& name);
 
   ResourceTablePackage* FindPackageById(uint8_t id);
 
-  ResourceTablePackage* CreatePackage(const StringPiece& name,
-                                      Maybe<uint8_t> id = {});
+  ResourceTablePackage* CreatePackage(const android::StringPiece& name, Maybe<uint8_t> id = {});
 
  private:
-  ResourceTablePackage* FindOrCreatePackage(const StringPiece& name);
+  ResourceTablePackage* FindOrCreatePackage(const android::StringPiece& name);
 
   bool AddResourceImpl(const ResourceNameRef& name, const ResourceId& res_id,
-                       const ConfigDescription& config,
-                       const StringPiece& product, std::unique_ptr<Value> value,
-                       const char* valid_chars,
-                       const CollisionResolverFunc& conflict_resolver,
-                       IDiagnostics* diag);
+                       const ConfigDescription& config, const android::StringPiece& product,
+                       std::unique_ptr<Value> value, const char* valid_chars,
+                       const CollisionResolverFunc& conflict_resolver, IDiagnostics* diag);
 
-  bool AddFileReferenceImpl(const ResourceNameRef& name,
-                            const ConfigDescription& config,
-                            const Source& source, const StringPiece& path,
-                            io::IFile* file, const char* valid_chars,
-                            IDiagnostics* diag);
+  bool AddFileReferenceImpl(const ResourceNameRef& name, const ConfigDescription& config,
+                            const Source& source, const android::StringPiece& path, io::IFile* file,
+                            const char* valid_chars, IDiagnostics* diag);
 
   bool SetSymbolStateImpl(const ResourceNameRef& name, const ResourceId& res_id,
                           const Symbol& symbol, const char* valid_chars,
diff --git a/tools/aapt2/ResourceUtils.cpp b/tools/aapt2/ResourceUtils.cpp
index fce9b33..1123967 100644
--- a/tools/aapt2/ResourceUtils.cpp
+++ b/tools/aapt2/ResourceUtils.cpp
@@ -26,6 +26,9 @@
 #include "util/Files.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+using android::StringPiece16;
+
 namespace aapt {
 namespace ResourceUtils {
 
@@ -59,7 +62,7 @@
     name_out.entry =
         util::Utf16ToUtf8(StringPiece16(name_in.name, name_in.nameLen));
   } else if (name_in.name8) {
-    name_out.entry = StringPiece(name_in.name8, name_in.nameLen).ToString();
+    name_out.entry.assign(name_in.name8, name_in.nameLen);
   } else {
     return {};
   }
@@ -303,9 +306,7 @@
     p++;
   }
 
-  ref.name =
-      ResourceName(package.ToString(), ResourceType::kAttr,
-                   name.empty() ? trimmed_str.ToString() : name.ToString());
+  ref.name = ResourceName(package, ResourceType::kAttr, name.empty() ? trimmed_str : name);
   return Maybe<Reference>(std::move(ref));
 }
 
diff --git a/tools/aapt2/ResourceUtils.h b/tools/aapt2/ResourceUtils.h
index 9766f6a..bd3a8e3 100644
--- a/tools/aapt2/ResourceUtils.h
+++ b/tools/aapt2/ResourceUtils.h
@@ -20,10 +20,11 @@
 #include <functional>
 #include <memory>
 
+#include "androidfw/StringPiece.h"
+
 #include "NameMangler.h"
 #include "Resource.h"
 #include "ResourceValues.h"
-#include "util/StringPiece.h"
 
 namespace aapt {
 namespace ResourceUtils {
@@ -37,8 +38,8 @@
  * individual extracted piece to verify that the pieces are valid.
  * Returns false if there was no package but a ':' was present.
  */
-bool ExtractResourceName(const StringPiece& str, StringPiece* out_package,
-                         StringPiece* out_type, StringPiece* out_entry);
+bool ExtractResourceName(const android::StringPiece& str, android::StringPiece* out_package,
+                         android::StringPiece* out_type, android::StringPiece* out_entry);
 
 /**
  * Returns true if the string was parsed as a resource name
@@ -46,7 +47,7 @@
  * `out_resource` set to the parsed resource name and `out_private` set to true
  * if a '*' prefix was present.
  */
-bool ParseResourceName(const StringPiece& str, ResourceNameRef* out_resource,
+bool ParseResourceName(const android::StringPiece& str, ResourceNameRef* out_resource,
                        bool* out_private = nullptr);
 
 /*
@@ -57,28 +58,27 @@
  * If '+' was present in the reference, `out_create` is set to true.
  * If '*' was present in the reference, `out_private` is set to true.
  */
-bool ParseReference(const StringPiece& str, ResourceNameRef* out_reference,
+bool ParseReference(const android::StringPiece& str, ResourceNameRef* out_reference,
                     bool* out_create = nullptr, bool* out_private = nullptr);
 
 /*
  * Returns true if the string is in the form of a resource reference
  * (@[+][package:]type/name).
  */
-bool IsReference(const StringPiece& str);
+bool IsReference(const android::StringPiece& str);
 
 /*
  * Returns true if the string was parsed as an attribute reference
  * (?[package:][type/]name),
  * with `out_reference` set to the parsed reference.
  */
-bool ParseAttributeReference(const StringPiece& str,
-                             ResourceNameRef* out_reference);
+bool ParseAttributeReference(const android::StringPiece& str, ResourceNameRef* out_reference);
 
 /**
  * Returns true if the string is in the form of an attribute
  * reference(?[package:][type/]name).
  */
-bool IsAttributeReference(const StringPiece& str);
+bool IsAttributeReference(const android::StringPiece& str);
 
 /**
  * Convert an android::ResTable::resource_name to an aapt::ResourceName struct.
@@ -90,22 +90,22 @@
  * Returns a boolean value if the string is equal to TRUE, true, True, FALSE,
  * false, or False.
  */
-Maybe<bool> ParseBool(const StringPiece& str);
+Maybe<bool> ParseBool(const android::StringPiece& str);
 
 /**
  * Returns a uint32_t if the string is an integer.
  */
-Maybe<uint32_t> ParseInt(const StringPiece& str);
+Maybe<uint32_t> ParseInt(const android::StringPiece& str);
 
 /**
  * Returns an ID if it the string represented a valid ID.
  */
-Maybe<ResourceId> ParseResourceId(const StringPiece& str);
+Maybe<ResourceId> ParseResourceId(const android::StringPiece& str);
 
 /**
  * Parses an SDK version, which can be an integer, or a letter from A-Z.
  */
-Maybe<int> ParseSdkVersion(const StringPiece& str);
+Maybe<int> ParseSdkVersion(const android::StringPiece& str);
 
 /*
  * Returns a Reference, or None Maybe instance if the string `str` was parsed as
@@ -118,8 +118,7 @@
  * ?[package:]style/<entry> or
  * <package>:[style/]<entry>
  */
-Maybe<Reference> ParseStyleParentReference(const StringPiece& str,
-                                           std::string* out_error);
+Maybe<Reference> ParseStyleParentReference(const android::StringPiece& str, std::string* out_error);
 
 /*
  * Returns a Reference if the string `str` was parsed as a valid XML attribute
@@ -128,7 +127,7 @@
  *
  * package:entry
  */
-Maybe<Reference> ParseXmlAttributeName(const StringPiece& str);
+Maybe<Reference> ParseXmlAttributeName(const android::StringPiece& str);
 
 /*
  * Returns a Reference object if the string was parsed as a resource or
@@ -137,52 +136,52 @@
  * if
  * the '+' was present in the string.
  */
-std::unique_ptr<Reference> TryParseReference(const StringPiece& str,
+std::unique_ptr<Reference> TryParseReference(const android::StringPiece& str,
                                              bool* out_create = nullptr);
 
 /*
  * Returns a BinaryPrimitve object representing @null or @empty if the string
  * was parsed as one.
  */
-std::unique_ptr<BinaryPrimitive> TryParseNullOrEmpty(const StringPiece& str);
+std::unique_ptr<BinaryPrimitive> TryParseNullOrEmpty(const android::StringPiece& str);
 
 /*
  * Returns a BinaryPrimitve object representing a color if the string was parsed
  * as one.
  */
-std::unique_ptr<BinaryPrimitive> TryParseColor(const StringPiece& str);
+std::unique_ptr<BinaryPrimitive> TryParseColor(const android::StringPiece& str);
 
 /*
  * Returns a BinaryPrimitve object representing a boolean if the string was
  * parsed as one.
  */
-std::unique_ptr<BinaryPrimitive> TryParseBool(const StringPiece& str);
+std::unique_ptr<BinaryPrimitive> TryParseBool(const android::StringPiece& str);
 
 /*
  * Returns a BinaryPrimitve object representing an integer if the string was
  * parsed as one.
  */
-std::unique_ptr<BinaryPrimitive> TryParseInt(const StringPiece& str);
+std::unique_ptr<BinaryPrimitive> TryParseInt(const android::StringPiece& str);
 
 /*
  * Returns a BinaryPrimitve object representing a floating point number
  * (float, dimension, etc) if the string was parsed as one.
  */
-std::unique_ptr<BinaryPrimitive> TryParseFloat(const StringPiece& str);
+std::unique_ptr<BinaryPrimitive> TryParseFloat(const android::StringPiece& str);
 
 /*
  * Returns a BinaryPrimitve object representing an enum symbol if the string was
  * parsed as one.
  */
 std::unique_ptr<BinaryPrimitive> TryParseEnumSymbol(const Attribute* enum_attr,
-                                                    const StringPiece& str);
+                                                    const android::StringPiece& str);
 
 /*
  * Returns a BinaryPrimitve object representing a flag symbol if the string was
  * parsed as one.
  */
 std::unique_ptr<BinaryPrimitive> TryParseFlagSymbol(const Attribute* enum_attr,
-                                                    const StringPiece& str);
+                                                    const android::StringPiece& str);
 /*
  * Try to convert a string to an Item for the given attribute. The attribute
  * will
@@ -191,11 +190,11 @@
  * reference to an ID that must be created (@+id/foo).
  */
 std::unique_ptr<Item> TryParseItemForAttribute(
-    const StringPiece& value, const Attribute* attr,
+    const android::StringPiece& value, const Attribute* attr,
     const std::function<void(const ResourceName&)>& on_create_reference = {});
 
 std::unique_ptr<Item> TryParseItemForAttribute(
-    const StringPiece& value, uint32_t type_mask,
+    const android::StringPiece& value, uint32_t type_mask,
     const std::function<void(const ResourceName&)>& on_create_reference = {});
 
 uint32_t AndroidTypeToAttributeTypeMask(uint16_t type);
diff --git a/tools/aapt2/ResourceUtils_test.cpp b/tools/aapt2/ResourceUtils_test.cpp
index f9c500b..048c692 100644
--- a/tools/aapt2/ResourceUtils_test.cpp
+++ b/tools/aapt2/ResourceUtils_test.cpp
@@ -48,8 +48,7 @@
   EXPECT_EQ(ResourceNameRef("android", ResourceType::kColor, "foo"), actual);
   EXPECT_TRUE(actual_priv);
 
-  EXPECT_FALSE(
-      ResourceUtils::ParseResourceName(StringPiece(), &actual, &actual_priv));
+  EXPECT_FALSE(ResourceUtils::ParseResourceName(android::StringPiece(), &actual, &actual_priv));
 }
 
 TEST(ResourceUtilsTest, ParseReferenceWithNoPackage) {
diff --git a/tools/aapt2/ResourceValues.h b/tools/aapt2/ResourceValues.h
index ea73615..d380f8d 100644
--- a/tools/aapt2/ResourceValues.h
+++ b/tools/aapt2/ResourceValues.h
@@ -22,6 +22,7 @@
 #include <vector>
 
 #include "androidfw/ResourceTypes.h"
+#include "androidfw/StringPiece.h"
 
 #include "Diagnostics.h"
 #include "Resource.h"
@@ -73,7 +74,7 @@
    */
   const std::string& GetComment() const { return comment_; }
 
-  void SetComment(const StringPiece& str) { comment_ = str.ToString(); }
+  void SetComment(const android::StringPiece& str) { comment_ = str.to_string(); }
 
   void SetComment(std::string&& str) { comment_ = std::move(str); }
 
diff --git a/tools/aapt2/SdkConstants.cpp b/tools/aapt2/SdkConstants.cpp
index c7f920a..e806714 100644
--- a/tools/aapt2/SdkConstants.cpp
+++ b/tools/aapt2/SdkConstants.cpp
@@ -21,6 +21,8 @@
 #include <unordered_map>
 #include <vector>
 
+using android::StringPiece;
+
 namespace aapt {
 
 static const char* sDevelopmentSdkCodeName = "O";
diff --git a/tools/aapt2/SdkConstants.h b/tools/aapt2/SdkConstants.h
index 5352b53..98ba94b 100644
--- a/tools/aapt2/SdkConstants.h
+++ b/tools/aapt2/SdkConstants.h
@@ -19,6 +19,8 @@
 
 #include <utility>
 
+#include "androidfw/StringPiece.h"
+
 #include "Resource.h"
 
 namespace aapt {
@@ -52,7 +54,7 @@
 
 size_t FindAttributeSdkLevel(const ResourceId& id);
 size_t FindAttributeSdkLevel(const ResourceName& name);
-std::pair<StringPiece, int> GetDevelopmentSdkCodeNameAndVersion();
+std::pair<android::StringPiece, int> GetDevelopmentSdkCodeNameAndVersion();
 
 }  // namespace aapt
 
diff --git a/tools/aapt2/Source.h b/tools/aapt2/Source.h
index 459a8e6..d7f2a66 100644
--- a/tools/aapt2/Source.h
+++ b/tools/aapt2/Source.h
@@ -20,8 +20,9 @@
 #include <ostream>
 #include <string>
 
+#include "androidfw/StringPiece.h"
+
 #include "util/Maybe.h"
-#include "util/StringPiece.h"
 
 namespace aapt {
 
@@ -35,12 +36,11 @@
 
   Source() = default;
 
-  inline Source(const StringPiece& path)
-      : path(path.ToString()) {  // NOLINT(implicit)
+  inline Source(const android::StringPiece& path) : path(path.to_string()) {  // NOLINT(implicit)
   }
 
-  inline Source(const StringPiece& path, size_t line)
-      : path(path.ToString()), line(line) {}
+  inline Source(const android::StringPiece& path, size_t line)
+      : path(path.to_string()), line(line) {}
 
   inline Source WithLine(size_t line) const { return Source(path, line); }
 };
diff --git a/tools/aapt2/StringPool.cpp b/tools/aapt2/StringPool.cpp
index 3032829..d968d73 100644
--- a/tools/aapt2/StringPool.cpp
+++ b/tools/aapt2/StringPool.cpp
@@ -22,11 +22,13 @@
 
 #include "android-base/logging.h"
 #include "androidfw/ResourceTypes.h"
+#include "androidfw/StringPiece.h"
 
 #include "util/BigBuffer.h"
-#include "util/StringPiece.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 StringPool::Ref::Ref() : entry_(nullptr) {}
@@ -140,7 +142,7 @@
   }
 
   Entry* entry = new Entry();
-  entry->value = str.ToString();
+  entry->value = str.to_string();
   entry->context = context;
   entry->index = strings_.size();
   entry->ref_ = 0;
diff --git a/tools/aapt2/StringPool.h b/tools/aapt2/StringPool.h
index a4f556c..d0ce489 100644
--- a/tools/aapt2/StringPool.h
+++ b/tools/aapt2/StringPool.h
@@ -23,9 +23,10 @@
 #include <unordered_map>
 #include <vector>
 
+#include "androidfw/StringPiece.h"
+
 #include "ConfigDescription.h"
 #include "util/BigBuffer.h"
-#include "util/StringPiece.h"
 
 namespace aapt {
 
@@ -149,14 +150,14 @@
    * Adds a string to the pool, unless it already exists. Returns
    * a reference to the string in the pool.
    */
-  Ref MakeRef(const StringPiece& str);
+  Ref MakeRef(const android::StringPiece& str);
 
   /**
    * Adds a string to the pool, unless it already exists, with a context
    * object that can be used when sorting the string pool. Returns
    * a reference to the string in the pool.
    */
-  Ref MakeRef(const StringPiece& str, const Context& context);
+  Ref MakeRef(const android::StringPiece& str, const Context& context);
 
   /**
    * Adds a style to the string pool and returns a reference to it.
@@ -208,11 +209,11 @@
 
   static bool Flatten(BigBuffer* out, const StringPool& pool, bool utf8);
 
-  Ref MakeRefImpl(const StringPiece& str, const Context& context, bool unique);
+  Ref MakeRefImpl(const android::StringPiece& str, const Context& context, bool unique);
 
   std::vector<std::unique_ptr<Entry>> strings_;
   std::vector<std::unique_ptr<StyleEntry>> styles_;
-  std::unordered_multimap<StringPiece, Entry*> indexed_strings_;
+  std::unordered_multimap<android::StringPiece, Entry*> indexed_strings_;
 };
 
 //
diff --git a/tools/aapt2/StringPool_test.cpp b/tools/aapt2/StringPool_test.cpp
index e1394fc..f64a8cf 100644
--- a/tools/aapt2/StringPool_test.cpp
+++ b/tools/aapt2/StringPool_test.cpp
@@ -18,9 +18,14 @@
 
 #include <string>
 
+#include "androidfw/StringPiece.h"
+
 #include "test/Test.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+using android::StringPiece16;
+
 namespace aapt {
 
 TEST(StringPoolTest, InsertOneString) {
@@ -236,8 +241,7 @@
     EXPECT_EQ(StringPiece16(u"goodbye"), util::GetString16(test, 1));
 
     EXPECT_EQ(StringPiece(sLongString), util::GetString(test, 2));
-    EXPECT_EQ(util::Utf8ToUtf16(sLongString),
-              util::GetString16(test, 2).ToString());
+    EXPECT_EQ(util::Utf8ToUtf16(sLongString), util::GetString16(test, 2).to_string());
 
     size_t len;
     EXPECT_TRUE(test.stringAt(3, &len) != nullptr ||
diff --git a/tools/aapt2/compile/Compile.cpp b/tools/aapt2/compile/Compile.cpp
index f0b18e6..8027f42 100644
--- a/tools/aapt2/compile/Compile.cpp
+++ b/tools/aapt2/compile/Compile.cpp
@@ -19,6 +19,12 @@
 #include <fstream>
 #include <string>
 
+#include "android-base/errors.h"
+#include "android-base/file.h"
+#include "androidfw/StringPiece.h"
+#include "google/protobuf/io/coded_stream.h"
+#include "google/protobuf/io/zero_copy_stream_impl_lite.h"
+
 #include "ConfigDescription.h"
 #include "Diagnostics.h"
 #include "Flags.h"
@@ -38,11 +44,7 @@
 #include "xml/XmlDom.h"
 #include "xml/XmlPullParser.h"
 
-#include "android-base/errors.h"
-#include "android-base/file.h"
-#include "google/protobuf/io/coded_stream.h"
-#include "google/protobuf/io/zero_copy_stream_impl_lite.h"
-
+using android::StringPiece;
 using google::protobuf::io::CopyingOutputStreamAdaptor;
 using google::protobuf::io::ZeroCopyOutputStream;
 
@@ -103,9 +105,8 @@
     name = name.substr(0, dot_pos);
   }
 
-  return ResourcePathData{Source(path),          dir_str.ToString(),
-                          name.ToString(),       extension.ToString(),
-                          config_str.ToString(), config};
+  return ResourcePathData{Source(path),          dir_str.to_string(),    name.to_string(),
+                          extension.to_string(), config_str.to_string(), config};
 }
 
 struct CompileOptions {
diff --git a/tools/aapt2/compile/IdAssigner.h b/tools/aapt2/compile/IdAssigner.h
index 371ec01..9640eb8 100644
--- a/tools/aapt2/compile/IdAssigner.h
+++ b/tools/aapt2/compile/IdAssigner.h
@@ -19,11 +19,11 @@
 
 #include <unordered_map>
 
+#include "android-base/macros.h"
+
 #include "Resource.h"
 #include "process/IResourceTableConsumer.h"
 
-#include "android-base/macros.h"
-
 namespace aapt {
 
 /**
@@ -40,8 +40,7 @@
   bool Consume(IAaptContext* context, ResourceTable* table) override;
 
  private:
-  const std::unordered_map<ResourceName, ResourceId>* assigned_id_map_ =
-      nullptr;
+  const std::unordered_map<ResourceName, ResourceId>* assigned_id_map_ = nullptr;
 };
 
 }  // namespace aapt
diff --git a/tools/aapt2/compile/NinePatch.cpp b/tools/aapt2/compile/NinePatch.cpp
index eab5c97..c931da4 100644
--- a/tools/aapt2/compile/NinePatch.cpp
+++ b/tools/aapt2/compile/NinePatch.cpp
@@ -21,10 +21,12 @@
 #include <vector>
 
 #include "androidfw/ResourceTypes.h"
+#include "androidfw/StringPiece.h"
 
-#include "util/StringPiece.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 // Colors in the format 0xAARRGGBB (the way 9-patch expects it).
diff --git a/tools/aapt2/compile/Png.cpp b/tools/aapt2/compile/Png.cpp
index 7ab05b5..5e15c88 100644
--- a/tools/aapt2/compile/Png.cpp
+++ b/tools/aapt2/compile/Png.cpp
@@ -15,18 +15,21 @@
  */
 
 #include "Png.h"
-#include "Source.h"
-#include "util/BigBuffer.h"
-#include "util/Util.h"
 
-#include <androidfw/ResourceTypes.h>
 #include <png.h>
 #include <zlib.h>
+
 #include <iostream>
 #include <sstream>
 #include <string>
 #include <vector>
 
+#include "androidfw/ResourceTypes.h"
+
+#include "Source.h"
+#include "util/BigBuffer.h"
+#include "util/Util.h"
+
 namespace aapt {
 
 constexpr bool kDebug = false;
diff --git a/tools/aapt2/compile/Png.h b/tools/aapt2/compile/Png.h
index aff1da3..a820051 100644
--- a/tools/aapt2/compile/Png.h
+++ b/tools/aapt2/compile/Png.h
@@ -56,7 +56,7 @@
  */
 class PngChunkFilter : public io::InputStream {
  public:
-  explicit PngChunkFilter(const StringPiece& data);
+  explicit PngChunkFilter(const android::StringPiece& data);
 
   bool Next(const void** buffer, int* len) override;
   void BackUp(int count) override;
@@ -71,7 +71,7 @@
  private:
   bool ConsumeWindow(const void** buffer, int* len);
 
-  StringPiece data_;
+  android::StringPiece data_;
   size_t window_start_ = 0;
   size_t window_end_ = 0;
   bool error_ = false;
diff --git a/tools/aapt2/compile/PngChunkFilter.cpp b/tools/aapt2/compile/PngChunkFilter.cpp
index 4cbefb9..edec123 100644
--- a/tools/aapt2/compile/PngChunkFilter.cpp
+++ b/tools/aapt2/compile/PngChunkFilter.cpp
@@ -16,8 +16,11 @@
 
 #include "compile/Png.h"
 
+#include "androidfw/StringPiece.h"
+
 #include "io/Io.h"
-#include "util/StringPiece.h"
+
+using android::StringPiece;
 
 namespace aapt {
 
diff --git a/tools/aapt2/compile/PseudolocaleGenerator.cpp b/tools/aapt2/compile/PseudolocaleGenerator.cpp
index 055a725..5035f81 100644
--- a/tools/aapt2/compile/PseudolocaleGenerator.cpp
+++ b/tools/aapt2/compile/PseudolocaleGenerator.cpp
@@ -23,6 +23,8 @@
 #include "ValueVisitor.h"
 #include "compile/Pseudolocalizer.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 std::unique_ptr<StyledString> PseudolocalizeStyledString(
diff --git a/tools/aapt2/compile/Pseudolocalizer.cpp b/tools/aapt2/compile/Pseudolocalizer.cpp
index f89288f..15a3d8c 100644
--- a/tools/aapt2/compile/Pseudolocalizer.cpp
+++ b/tools/aapt2/compile/Pseudolocalizer.cpp
@@ -18,6 +18,8 @@
 
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 // String basis to generate expansion
@@ -40,10 +42,8 @@
 
 class PseudoMethodNone : public PseudoMethodImpl {
  public:
-  std::string Text(const StringPiece& text) override { return text.ToString(); }
-  std::string Placeholder(const StringPiece& text) override {
-    return text.ToString();
-  }
+  std::string Text(const StringPiece& text) override { return text.to_string(); }
+  std::string Placeholder(const StringPiece& text) override { return text.to_string(); }
 };
 
 class PseudoMethodBidi : public PseudoMethodImpl {
@@ -116,7 +116,7 @@
       }
       size_t size = nextpos - lastpos;
       if (size) {
-        std::string chunk = text.substr(lastpos, size).ToString();
+        std::string chunk = text.substr(lastpos, size).to_string();
         if (pseudo) {
           chunk = impl_->Text(chunk);
         } else if (str[lastpos] == kArgStart && str[nextpos - 1] == kArgEnd) {
@@ -437,7 +437,7 @@
 
 std::string PseudoMethodAccent::Placeholder(const StringPiece& source) {
   // Surround a placeholder with brackets
-  return kPlaceholderOpen + source.ToString() + kPlaceholderClose;
+  return kPlaceholderOpen + source.to_string() + kPlaceholderClose;
 }
 
 std::string PseudoMethodBidi::Text(const StringPiece& source) {
@@ -467,7 +467,7 @@
 
 std::string PseudoMethodBidi::Placeholder(const StringPiece& source) {
   // Surround a placeholder with directionality change sequence
-  return kRlm + kRlo + source.ToString() + kPdf + kRlm;
+  return kRlm + kRlo + source.to_string() + kPdf + kRlm;
 }
 
 }  // namespace aapt
diff --git a/tools/aapt2/compile/Pseudolocalizer.h b/tools/aapt2/compile/Pseudolocalizer.h
index a6d2ad0..6cf003b 100644
--- a/tools/aapt2/compile/Pseudolocalizer.h
+++ b/tools/aapt2/compile/Pseudolocalizer.h
@@ -20,10 +20,10 @@
 #include <memory>
 
 #include "android-base/macros.h"
+#include "androidfw/StringPiece.h"
 
 #include "ResourceValues.h"
 #include "StringPool.h"
-#include "util/StringPiece.h"
 
 namespace aapt {
 
@@ -32,8 +32,8 @@
   virtual ~PseudoMethodImpl() {}
   virtual std::string Start() { return {}; }
   virtual std::string End() { return {}; }
-  virtual std::string Text(const StringPiece& text) = 0;
-  virtual std::string Placeholder(const StringPiece& text) = 0;
+  virtual std::string Text(const android::StringPiece& text) = 0;
+  virtual std::string Placeholder(const android::StringPiece& text) = 0;
 };
 
 class Pseudolocalizer {
@@ -48,7 +48,7 @@
   void SetMethod(Method method);
   std::string Start() { return impl_->Start(); }
   std::string End() { return impl_->End(); }
-  std::string Text(const StringPiece& text);
+  std::string Text(const android::StringPiece& text);
 
  private:
   std::unique_ptr<PseudoMethodImpl> impl_;
diff --git a/tools/aapt2/compile/Pseudolocalizer_test.cpp b/tools/aapt2/compile/Pseudolocalizer_test.cpp
index 92eb3b5..d3b7b02 100644
--- a/tools/aapt2/compile/Pseudolocalizer_test.cpp
+++ b/tools/aapt2/compile/Pseudolocalizer_test.cpp
@@ -19,6 +19,8 @@
 #include "test/Test.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 // In this context, 'Axis' represents a particular field in the configuration,
diff --git a/tools/aapt2/diff/Diff.cpp b/tools/aapt2/diff/Diff.cpp
index 593e7ab..de0fe40 100644
--- a/tools/aapt2/diff/Diff.cpp
+++ b/tools/aapt2/diff/Diff.cpp
@@ -24,6 +24,8 @@
 #include "process/SymbolTable.h"
 #include "unflatten/BinaryResourceParser.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 class DiffContext : public IAaptContext {
diff --git a/tools/aapt2/dump/Dump.cpp b/tools/aapt2/dump/Dump.cpp
index 2920c2a..bcede72 100644
--- a/tools/aapt2/dump/Dump.cpp
+++ b/tools/aapt2/dump/Dump.cpp
@@ -16,6 +16,8 @@
 
 #include <vector>
 
+#include "androidfw/StringPiece.h"
+
 #include "Debug.h"
 #include "Diagnostics.h"
 #include "Flags.h"
@@ -24,7 +26,8 @@
 #include "proto/ProtoSerialize.h"
 #include "unflatten/BinaryResourceParser.h"
 #include "util/Files.h"
-#include "util/StringPiece.h"
+
+using android::StringPiece;
 
 namespace aapt {
 
diff --git a/tools/aapt2/flatten/Archive.cpp b/tools/aapt2/flatten/Archive.cpp
index 47de0a3..5c96a4d 100644
--- a/tools/aapt2/flatten/Archive.cpp
+++ b/tools/aapt2/flatten/Archive.cpp
@@ -22,10 +22,12 @@
 #include <vector>
 
 #include "android-base/macros.h"
+#include "androidfw/StringPiece.h"
 #include "ziparchive/zip_writer.h"
 
 #include "util/Files.h"
-#include "util/StringPiece.h"
+
+using android::StringPiece;
 
 namespace aapt {
 
@@ -36,7 +38,7 @@
   DirectoryWriter() = default;
 
   bool Open(IDiagnostics* diag, const StringPiece& out_dir) {
-    dir_ = out_dir.ToString();
+    dir_ = out_dir.to_string();
     file::FileType type = file::GetFileType(dir_);
     if (type == file::FileType::kNonexistant) {
       diag->Error(DiagMessage() << "directory " << dir_ << " does not exist");
diff --git a/tools/aapt2/flatten/Archive.h b/tools/aapt2/flatten/Archive.h
index 4fcb3ff..f0681bd 100644
--- a/tools/aapt2/flatten/Archive.h
+++ b/tools/aapt2/flatten/Archive.h
@@ -22,12 +22,12 @@
 #include <string>
 #include <vector>
 
+#include "androidfw/StringPiece.h"
 #include "google/protobuf/io/zero_copy_stream_impl_lite.h"
 
 #include "Diagnostics.h"
 #include "util/BigBuffer.h"
 #include "util/Files.h"
-#include "util/StringPiece.h"
 
 namespace aapt {
 
@@ -46,7 +46,7 @@
  public:
   virtual ~IArchiveWriter() = default;
 
-  virtual bool StartEntry(const StringPiece& path, uint32_t flags) = 0;
+  virtual bool StartEntry(const android::StringPiece& path, uint32_t flags) = 0;
   virtual bool WriteEntry(const BigBuffer& buffer) = 0;
   virtual bool WriteEntry(const void* data, size_t len) = 0;
   virtual bool FinishEntry() = 0;
@@ -57,11 +57,11 @@
   }
 };
 
-std::unique_ptr<IArchiveWriter> CreateDirectoryArchiveWriter(
-    IDiagnostics* diag, const StringPiece& path);
+std::unique_ptr<IArchiveWriter> CreateDirectoryArchiveWriter(IDiagnostics* diag,
+                                                             const android::StringPiece& path);
 
-std::unique_ptr<IArchiveWriter> CreateZipFileArchiveWriter(
-    IDiagnostics* diag, const StringPiece& path);
+std::unique_ptr<IArchiveWriter> CreateZipFileArchiveWriter(IDiagnostics* diag,
+                                                           const android::StringPiece& path);
 
 }  // namespace aapt
 
diff --git a/tools/aapt2/flatten/XmlFlattener_test.cpp b/tools/aapt2/flatten/XmlFlattener_test.cpp
index 2c83bb3..ffc2de1 100644
--- a/tools/aapt2/flatten/XmlFlattener_test.cpp
+++ b/tools/aapt2/flatten/XmlFlattener_test.cpp
@@ -23,6 +23,8 @@
 #include "util/BigBuffer.h"
 #include "util/Util.h"
 
+using android::StringPiece16;
+
 namespace aapt {
 
 class XmlFlattenerTest : public ::testing::Test {
diff --git a/tools/aapt2/io/File.h b/tools/aapt2/io/File.h
index 644f59f..3d5b5b1 100644
--- a/tools/aapt2/io/File.h
+++ b/tools/aapt2/io/File.h
@@ -110,7 +110,7 @@
  public:
   virtual ~IFileCollection() = default;
 
-  virtual IFile* FindFile(const StringPiece& path) = 0;
+  virtual IFile* FindFile(const android::StringPiece& path) = 0;
   virtual std::unique_ptr<IFileCollectionIterator> Iterator() = 0;
 };
 
diff --git a/tools/aapt2/io/FileSystem.cpp b/tools/aapt2/io/FileSystem.cpp
index 828f34e..027cbd0 100644
--- a/tools/aapt2/io/FileSystem.cpp
+++ b/tools/aapt2/io/FileSystem.cpp
@@ -16,14 +16,16 @@
 
 #include "io/FileSystem.h"
 
+#include "androidfw/StringPiece.h"
 #include "utils/FileMap.h"
 
 #include "Source.h"
 #include "util/Files.h"
 #include "util/Maybe.h"
-#include "util/StringPiece.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 namespace io {
 
@@ -54,13 +56,11 @@
 }
 
 IFile* FileCollection::InsertFile(const StringPiece& path) {
-  return (files_[path.ToString()] =
-              util::make_unique<RegularFile>(Source(path)))
-      .get();
+  return (files_[path.to_string()] = util::make_unique<RegularFile>(Source(path))).get();
 }
 
 IFile* FileCollection::FindFile(const StringPiece& path) {
-  auto iter = files_.find(path.ToString());
+  auto iter = files_.find(path.to_string());
   if (iter != files_.end()) {
     return iter->second.get();
   }
diff --git a/tools/aapt2/io/FileSystem.h b/tools/aapt2/io/FileSystem.h
index 84f851f..dfd3717 100644
--- a/tools/aapt2/io/FileSystem.h
+++ b/tools/aapt2/io/FileSystem.h
@@ -59,8 +59,8 @@
   /**
    * Adds a file located at path. Returns the IFile representation of that file.
    */
-  IFile* InsertFile(const StringPiece& path);
-  IFile* FindFile(const StringPiece& path) override;
+  IFile* InsertFile(const android::StringPiece& path);
+  IFile* FindFile(const android::StringPiece& path) override;
   std::unique_ptr<IFileCollectionIterator> Iterator() override;
 
  private:
diff --git a/tools/aapt2/io/ZipArchive.cpp b/tools/aapt2/io/ZipArchive.cpp
index f4a128e..62b436f 100644
--- a/tools/aapt2/io/ZipArchive.cpp
+++ b/tools/aapt2/io/ZipArchive.cpp
@@ -22,6 +22,8 @@
 #include "Source.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 namespace io {
 
@@ -107,7 +109,7 @@
     std::string zip_entry_path =
         std::string(reinterpret_cast<const char*>(zip_entry_name.name),
                     zip_entry_name.name_length);
-    std::string nested_path = path.ToString() + "@" + zip_entry_path;
+    std::string nested_path = path.to_string() + "@" + zip_entry_path;
     collection->files_[zip_entry_path] = util::make_unique<ZipFile>(
         collection->handle_, zip_data, Source(nested_path));
   }
@@ -120,7 +122,7 @@
 }
 
 IFile* ZipFileCollection::FindFile(const StringPiece& path) {
-  auto iter = files_.find(path.ToString());
+  auto iter = files_.find(path.to_string());
   if (iter != files_.end()) {
     return iter->second.get();
   }
diff --git a/tools/aapt2/io/ZipArchive.h b/tools/aapt2/io/ZipArchive.h
index 85ca1ae..634adad 100644
--- a/tools/aapt2/io/ZipArchive.h
+++ b/tools/aapt2/io/ZipArchive.h
@@ -21,8 +21,9 @@
 
 #include <map>
 
+#include "androidfw/StringPiece.h"
+
 #include "io/File.h"
-#include "util/StringPiece.h"
 
 namespace aapt {
 namespace io {
@@ -64,10 +65,10 @@
  */
 class ZipFileCollection : public IFileCollection {
  public:
-  static std::unique_ptr<ZipFileCollection> Create(const StringPiece& path,
+  static std::unique_ptr<ZipFileCollection> Create(const android::StringPiece& path,
                                                    std::string* outError);
 
-  io::IFile* FindFile(const StringPiece& path) override;
+  io::IFile* FindFile(const android::StringPiece& path) override;
   std::unique_ptr<IFileCollectionIterator> Iterator() override;
 
   ~ZipFileCollection() override;
diff --git a/tools/aapt2/java/AnnotationProcessor.cpp b/tools/aapt2/java/AnnotationProcessor.cpp
index 2951e5c..a0ef00b 100644
--- a/tools/aapt2/java/AnnotationProcessor.cpp
+++ b/tools/aapt2/java/AnnotationProcessor.cpp
@@ -20,6 +20,8 @@
 
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 void AnnotationProcessor::AppendCommentLine(std::string& comment) {
@@ -54,7 +56,7 @@
   for (StringPiece line : util::Tokenize(comment, '\n')) {
     line = util::TrimWhitespace(line);
     if (!line.empty()) {
-      std::string lineCopy = line.ToString();
+      std::string lineCopy = line.to_string();
       AppendCommentLine(lineCopy);
     }
   }
diff --git a/tools/aapt2/java/AnnotationProcessor.h b/tools/aapt2/java/AnnotationProcessor.h
index 666a7f3..99cd44f 100644
--- a/tools/aapt2/java/AnnotationProcessor.h
+++ b/tools/aapt2/java/AnnotationProcessor.h
@@ -20,7 +20,7 @@
 #include <sstream>
 #include <string>
 
-#include "util/StringPiece.h"
+#include "androidfw/StringPiece.h"
 
 namespace aapt {
 
@@ -58,7 +58,7 @@
    * configurations,
    * we need to collect all the comments.
    */
-  void AppendComment(const StringPiece& comment);
+  void AppendComment(const android::StringPiece& comment);
 
   void AppendNewLine();
 
@@ -66,7 +66,7 @@
    * Writes the comments and annotations to the stream, with the given prefix
    * before each line.
    */
-  void WriteToStream(std::ostream* out, const StringPiece& prefix) const;
+  void WriteToStream(std::ostream* out, const android::StringPiece& prefix) const;
 
  private:
   enum : uint32_t {
diff --git a/tools/aapt2/java/ClassDefinition.cpp b/tools/aapt2/java/ClassDefinition.cpp
index f1f1f92..53d6ea1 100644
--- a/tools/aapt2/java/ClassDefinition.cpp
+++ b/tools/aapt2/java/ClassDefinition.cpp
@@ -16,7 +16,9 @@
 
 #include "java/ClassDefinition.h"
 
-#include "util/StringPiece.h"
+#include "androidfw/StringPiece.h"
+
+using android::StringPiece;
 
 namespace aapt {
 
@@ -43,7 +45,7 @@
   }
   *out << "final class " << name_ << " {\n";
 
-  std::string new_prefix = prefix.ToString();
+  std::string new_prefix = prefix.to_string();
   new_prefix.append(kIndent);
 
   for (const std::unique_ptr<ClassMember>& member : members_) {
diff --git a/tools/aapt2/java/ClassDefinition.h b/tools/aapt2/java/ClassDefinition.h
index d8b61d9..64e4b29 100644
--- a/tools/aapt2/java/ClassDefinition.h
+++ b/tools/aapt2/java/ClassDefinition.h
@@ -21,10 +21,10 @@
 #include <string>
 
 #include "android-base/macros.h"
+#include "androidfw/StringPiece.h"
 
 #include "Resource.h"
 #include "java/AnnotationProcessor.h"
-#include "util/StringPiece.h"
 #include "util/Util.h"
 
 namespace aapt {
@@ -41,7 +41,7 @@
 
   virtual bool empty() const = 0;
 
-  virtual void WriteToStream(const StringPiece& prefix, bool final,
+  virtual void WriteToStream(const android::StringPiece& prefix, bool final,
                              std::ostream* out) const {
     processor_.WriteToStream(out, prefix);
   }
@@ -53,12 +53,12 @@
 template <typename T>
 class PrimitiveMember : public ClassMember {
  public:
-  PrimitiveMember(const StringPiece& name, const T& val)
-      : name_(name.ToString()), val_(val) {}
+  PrimitiveMember(const android::StringPiece& name, const T& val)
+      : name_(name.to_string()), val_(val) {}
 
   bool empty() const override { return false; }
 
-  void WriteToStream(const StringPiece& prefix, bool final,
+  void WriteToStream(const android::StringPiece& prefix, bool final,
                      std::ostream* out) const override {
     ClassMember::WriteToStream(prefix, final, out);
 
@@ -79,12 +79,12 @@
 template <>
 class PrimitiveMember<std::string> : public ClassMember {
  public:
-  PrimitiveMember(const StringPiece& name, const std::string& val)
-      : name_(name.ToString()), val_(val) {}
+  PrimitiveMember(const android::StringPiece& name, const std::string& val)
+      : name_(name.to_string()), val_(val) {}
 
   bool empty() const override { return false; }
 
-  void WriteToStream(const StringPiece& prefix, bool final,
+  void WriteToStream(const android::StringPiece& prefix, bool final,
                      std::ostream* out) const override {
     ClassMember::WriteToStream(prefix, final, out);
 
@@ -106,14 +106,13 @@
 template <typename T>
 class PrimitiveArrayMember : public ClassMember {
  public:
-  explicit PrimitiveArrayMember(const StringPiece& name)
-      : name_(name.ToString()) {}
+  explicit PrimitiveArrayMember(const android::StringPiece& name) : name_(name.to_string()) {}
 
   void AddElement(const T& val) { elements_.push_back(val); }
 
   bool empty() const override { return false; }
 
-  void WriteToStream(const StringPiece& prefix, bool final,
+  void WriteToStream(const android::StringPiece& prefix, bool final,
                      std::ostream* out) const override {
     ClassMember::WriteToStream(prefix, final, out);
 
@@ -147,22 +146,18 @@
 
 class ClassDefinition : public ClassMember {
  public:
-  static bool WriteJavaFile(const ClassDefinition* def,
-                            const StringPiece& package, bool final,
-                            std::ostream* out);
+  static bool WriteJavaFile(const ClassDefinition* def, const android::StringPiece& package,
+                            bool final, std::ostream* out);
 
-  ClassDefinition(const StringPiece& name, ClassQualifier qualifier,
-                  bool createIfEmpty)
-      : name_(name.ToString()),
-        qualifier_(qualifier),
-        create_if_empty_(createIfEmpty) {}
+  ClassDefinition(const android::StringPiece& name, ClassQualifier qualifier, bool createIfEmpty)
+      : name_(name.to_string()), qualifier_(qualifier), create_if_empty_(createIfEmpty) {}
 
   void AddMember(std::unique_ptr<ClassMember> member) {
     members_.push_back(std::move(member));
   }
 
   bool empty() const override;
-  void WriteToStream(const StringPiece& prefix, bool final,
+  void WriteToStream(const android::StringPiece& prefix, bool final,
                      std::ostream* out) const override;
 
  private:
diff --git a/tools/aapt2/java/JavaClassGenerator.cpp b/tools/aapt2/java/JavaClassGenerator.cpp
index 6e7c7078..b71dc48 100644
--- a/tools/aapt2/java/JavaClassGenerator.cpp
+++ b/tools/aapt2/java/JavaClassGenerator.cpp
@@ -23,6 +23,7 @@
 #include <tuple>
 
 #include "android-base/logging.h"
+#include "androidfw/StringPiece.h"
 
 #include "NameMangler.h"
 #include "Resource.h"
@@ -32,7 +33,8 @@
 #include "java/AnnotationProcessor.h"
 #include "java/ClassDefinition.h"
 #include "process/SymbolTable.h"
-#include "util/StringPiece.h"
+
+using android::StringPiece;
 
 namespace aapt {
 
@@ -58,7 +60,7 @@
  * Replace those with '_'.
  */
 static std::string Transform(const StringPiece& symbol) {
-  std::string output = symbol.ToString();
+  std::string output = symbol.to_string();
   for (char& c : output) {
     if (c == '.' || c == '-') {
       c = '_';
diff --git a/tools/aapt2/java/JavaClassGenerator.h b/tools/aapt2/java/JavaClassGenerator.h
index 190e73b..5cf556e 100644
--- a/tools/aapt2/java/JavaClassGenerator.h
+++ b/tools/aapt2/java/JavaClassGenerator.h
@@ -20,10 +20,11 @@
 #include <ostream>
 #include <string>
 
+#include "androidfw/StringPiece.h"
+
 #include "ResourceTable.h"
 #include "ResourceValues.h"
 #include "process/IResourceTableConsumer.h"
-#include "util/StringPiece.h"
 
 namespace aapt {
 
@@ -69,22 +70,20 @@
    * We need to generate these symbols in a separate file.
    * Returns true on success.
    */
-  bool Generate(const StringPiece& packageNameToGenerate, std::ostream* out);
+  bool Generate(const android::StringPiece& packageNameToGenerate, std::ostream* out);
 
-  bool Generate(const StringPiece& packageNameToGenerate,
-                const StringPiece& outputPackageName, std::ostream* out);
+  bool Generate(const android::StringPiece& packageNameToGenerate,
+                const android::StringPiece& outputPackageName, std::ostream* out);
 
   const std::string& getError() const;
 
  private:
-  bool AddMembersToTypeClass(const StringPiece& packageNameToGenerate,
-                             const ResourceTablePackage* package,
-                             const ResourceTableType* type,
+  bool AddMembersToTypeClass(const android::StringPiece& packageNameToGenerate,
+                             const ResourceTablePackage* package, const ResourceTableType* type,
                              ClassDefinition* outTypeClassDef);
 
-  void AddMembersToStyleableClass(const StringPiece& packageNameToGenerate,
-                                  const std::string& entryName,
-                                  const Styleable* styleable,
+  void AddMembersToStyleableClass(const android::StringPiece& packageNameToGenerate,
+                                  const std::string& entryName, const Styleable* styleable,
                                   ClassDefinition* outStyleableClassDef);
 
   bool SkipSymbol(SymbolState state);
diff --git a/tools/aapt2/java/JavaClassGenerator_test.cpp b/tools/aapt2/java/JavaClassGenerator_test.cpp
index 3d3d24e..55c5cb2 100644
--- a/tools/aapt2/java/JavaClassGenerator_test.cpp
+++ b/tools/aapt2/java/JavaClassGenerator_test.cpp
@@ -22,6 +22,8 @@
 #include "test/Test.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 TEST(JavaClassGeneratorTest, FailWhenEntryIsJavaKeyword) {
diff --git a/tools/aapt2/java/ManifestClassGenerator.cpp b/tools/aapt2/java/ManifestClassGenerator.cpp
index db84f29..de8e59a 100644
--- a/tools/aapt2/java/ManifestClassGenerator.cpp
+++ b/tools/aapt2/java/ManifestClassGenerator.cpp
@@ -24,6 +24,8 @@
 #include "util/Maybe.h"
 #include "xml/XmlDom.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 static Maybe<StringPiece> ExtractJavaIdentifier(IDiagnostics* diag,
diff --git a/tools/aapt2/jni/aapt2_jni.cpp b/tools/aapt2/jni/aapt2_jni.cpp
index 5518fe2..b029b20 100644
--- a/tools/aapt2/jni/aapt2_jni.cpp
+++ b/tools/aapt2/jni/aapt2_jni.cpp
@@ -26,6 +26,8 @@
 
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 extern int Compile(const std::vector<StringPiece> &args);
 extern int Link(const std::vector<StringPiece> &args);
@@ -65,9 +67,8 @@
  * The returned pieces can only be used while the original ones have not been
  * destroyed.
  */
-static std::vector<aapt::StringPiece> extract_pieces(
-    const std::vector<ScopedUtfChars> &strings) {
-  std::vector<aapt::StringPiece> pieces;
+static std::vector<StringPiece> extract_pieces(const std::vector<ScopedUtfChars> &strings) {
+  std::vector<StringPiece> pieces;
 
   std::for_each(
       strings.begin(), strings.end(),
@@ -80,8 +81,7 @@
     JNIEnv *env, jclass aapt_obj, jobject arguments_obj) {
   std::vector<ScopedUtfChars> compile_args_jni =
       list_to_utfchars(env, arguments_obj);
-  std::vector<aapt::StringPiece> compile_args =
-      extract_pieces(compile_args_jni);
+  std::vector<StringPiece> compile_args = extract_pieces(compile_args_jni);
   aapt::Compile(compile_args);
 }
 
@@ -89,7 +89,7 @@
     JNIEnv *env, jclass aapt_obj, jobject arguments_obj) {
   std::vector<ScopedUtfChars> link_args_jni =
       list_to_utfchars(env, arguments_obj);
-  std::vector<aapt::StringPiece> link_args = extract_pieces(link_args_jni);
+  std::vector<StringPiece> link_args = extract_pieces(link_args_jni);
   aapt::Link(link_args);
 }
 
diff --git a/tools/aapt2/link/Link.cpp b/tools/aapt2/link/Link.cpp
index b525758..c3ce076 100644
--- a/tools/aapt2/link/Link.cpp
+++ b/tools/aapt2/link/Link.cpp
@@ -23,6 +23,7 @@
 
 #include "android-base/errors.h"
 #include "android-base/file.h"
+#include "androidfw/StringPiece.h"
 #include "google/protobuf/io/coded_stream.h"
 
 #include "AppInfo.h"
@@ -51,9 +52,9 @@
 #include "split/TableSplitter.h"
 #include "unflatten/BinaryResourceParser.h"
 #include "util/Files.h"
-#include "util/StringPiece.h"
 #include "xml/XmlDom.h"
 
+using android::StringPiece;
 using ::google::protobuf::io::CopyingOutputStreamAdaptor;
 
 namespace aapt {
@@ -121,7 +122,7 @@
   }
 
   void SetCompilationPackage(const StringPiece& package_name) {
-    compilation_package_ = package_name.ToString();
+    compilation_package_ = package_name.to_string();
   }
 
   uint8_t GetPackageId() override { return package_id_; }
@@ -2011,14 +2012,14 @@
   for (std::string& extra_package : extra_java_packages) {
     // A given package can actually be a colon separated list of packages.
     for (StringPiece package : util::Split(extra_package, ':')) {
-      options.extra_java_packages.insert(package.ToString());
+      options.extra_java_packages.insert(package.to_string());
     }
   }
 
   if (product_list) {
     for (StringPiece product : util::Tokenize(product_list.value(), ',')) {
       if (product != "" && product != "default") {
-        options.products.insert(product.ToString());
+        options.products.insert(product.to_string());
       }
     }
   }
diff --git a/tools/aapt2/link/ManifestFixer.cpp b/tools/aapt2/link/ManifestFixer.cpp
index 4185937..e5eaf2f 100644
--- a/tools/aapt2/link/ManifestFixer.cpp
+++ b/tools/aapt2/link/ManifestFixer.cpp
@@ -25,6 +25,8 @@
 #include "xml/XmlActionExecutor.h"
 #include "xml/XmlDom.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 /**
@@ -293,7 +295,7 @@
   CHECK(attr != nullptr);
 
   std::string original_package = std::move(attr->value);
-  attr->value = package_override.ToString();
+  attr->value = package_override.to_string();
 
   FullyQualifiedClassNameVisitor visitor(original_package);
   manifest_el->Accept(&visitor);
diff --git a/tools/aapt2/link/ManifestFixer_test.cpp b/tools/aapt2/link/ManifestFixer_test.cpp
index fc6970c..12a304a 100644
--- a/tools/aapt2/link/ManifestFixer_test.cpp
+++ b/tools/aapt2/link/ManifestFixer_test.cpp
@@ -18,6 +18,8 @@
 
 #include "test/Test.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 struct ManifestFixerTest : public ::testing::Test {
diff --git a/tools/aapt2/link/ReferenceLinker.cpp b/tools/aapt2/link/ReferenceLinker.cpp
index be787b2..ea68b61 100644
--- a/tools/aapt2/link/ReferenceLinker.cpp
+++ b/tools/aapt2/link/ReferenceLinker.cpp
@@ -30,6 +30,8 @@
 #include "util/Util.h"
 #include "xml/XmlUtil.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 namespace {
@@ -192,8 +194,7 @@
       const StringPiece& alias,
       const StringPiece& local_package) const override {
     if (alias.empty()) {
-      return xml::ExtractedPackage{local_package.ToString(),
-                                   true /* private */};
+      return xml::ExtractedPackage{local_package.to_string(), true /* private */};
     }
     return {};
   }
diff --git a/tools/aapt2/link/TableMerger.cpp b/tools/aapt2/link/TableMerger.cpp
index d808da3..7e7b9fb 100644
--- a/tools/aapt2/link/TableMerger.cpp
+++ b/tools/aapt2/link/TableMerger.cpp
@@ -24,6 +24,8 @@
 #include "ValueVisitor.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 TableMerger::TableMerger(IAaptContext* context, ResourceTable* out_table,
@@ -351,9 +353,8 @@
     const std::string& package, const FileReference& file_ref) {
   StringPiece prefix, entry, suffix;
   if (util::ExtractResFilePathParts(*file_ref.path, &prefix, &entry, &suffix)) {
-    std::string mangled_entry =
-        NameMangler::MangleEntry(package, entry.ToString());
-    std::string newPath = prefix.ToString() + mangled_entry + suffix.ToString();
+    std::string mangled_entry = NameMangler::MangleEntry(package, entry.to_string());
+    std::string newPath = prefix.to_string() + mangled_entry + suffix.to_string();
     std::unique_ptr<FileReference> new_file_ref =
         util::make_unique<FileReference>(
             master_table_->string_pool.MakeRef(newPath));
diff --git a/tools/aapt2/link/TableMerger.h b/tools/aapt2/link/TableMerger.h
index 4ab83c3..c96b1b0 100644
--- a/tools/aapt2/link/TableMerger.h
+++ b/tools/aapt2/link/TableMerger.h
@@ -96,8 +96,8 @@
    * An io::IFileCollection is needed in order to find the referenced Files and
    * process them.
    */
-  bool MergeAndMangle(const Source& src, const StringPiece& package,
-                      ResourceTable* table, io::IFileCollection* collection);
+  bool MergeAndMangle(const Source& src, const android::StringPiece& package, ResourceTable* table,
+                      io::IFileCollection* collection);
 
   /**
    * Merges a compiled file that belongs to this same or empty package. This is
diff --git a/tools/aapt2/link/VersionCollapser_test.cpp b/tools/aapt2/link/VersionCollapser_test.cpp
index 1b5592f..44babb2 100644
--- a/tools/aapt2/link/VersionCollapser_test.cpp
+++ b/tools/aapt2/link/VersionCollapser_test.cpp
@@ -18,6 +18,8 @@
 
 #include "test/Test.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 static std::unique_ptr<ResourceTable> BuildTableWithConfigs(
diff --git a/tools/aapt2/process/SymbolTable.cpp b/tools/aapt2/process/SymbolTable.cpp
index 767384d..1a3da73 100644
--- a/tools/aapt2/process/SymbolTable.cpp
+++ b/tools/aapt2/process/SymbolTable.cpp
@@ -25,6 +25,8 @@
 #include "ValueVisitor.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 void SymbolTable::AppendSource(std::unique_ptr<ISymbolSource> source) {
diff --git a/tools/aapt2/process/SymbolTable.h b/tools/aapt2/process/SymbolTable.h
index 25f7565..cf597bb 100644
--- a/tools/aapt2/process/SymbolTable.h
+++ b/tools/aapt2/process/SymbolTable.h
@@ -154,7 +154,7 @@
  public:
   AssetManagerSymbolSource() = default;
 
-  bool AddAssetPath(const StringPiece& path);
+  bool AddAssetPath(const android::StringPiece& path);
 
   std::unique_ptr<SymbolTable::Symbol> FindByName(
       const ResourceName& name) override;
diff --git a/tools/aapt2/proto/TableProtoSerializer.cpp b/tools/aapt2/proto/TableProtoSerializer.cpp
index 0d0e46d..7230b55 100644
--- a/tools/aapt2/proto/TableProtoSerializer.cpp
+++ b/tools/aapt2/proto/TableProtoSerializer.cpp
@@ -22,7 +22,7 @@
 #include "proto/ProtoSerialize.h"
 #include "util/BigBuffer.h"
 
-#include <android-base/logging.h>
+#include "android-base/logging.h"
 
 using google::protobuf::io::CodedOutputStream;
 using google::protobuf::io::CodedInputStream;
@@ -239,7 +239,7 @@
       if (type->id) {
         pb_type->set_id(type->id.value());
       }
-      pb_type->set_name(ToString(type->type).ToString());
+      pb_type->set_name(ToString(type->type).to_string());
 
       for (auto& entry : type->entries) {
         pb::Entry* pb_entry = pb_type->add_entries();
diff --git a/tools/aapt2/split/TableSplitter.cpp b/tools/aapt2/split/TableSplitter.cpp
index 7aad86f..38cfd2e 100644
--- a/tools/aapt2/split/TableSplitter.cpp
+++ b/tools/aapt2/split/TableSplitter.cpp
@@ -21,6 +21,7 @@
 #include <set>
 #include <unordered_map>
 #include <vector>
+
 #include "android-base/logging.h"
 
 #include "ConfigDescription.h"
diff --git a/tools/aapt2/test/Builders.h b/tools/aapt2/test/Builders.h
index 9377306..6888cf3 100644
--- a/tools/aapt2/test/Builders.h
+++ b/tools/aapt2/test/Builders.h
@@ -37,95 +37,86 @@
 
   StringPool* string_pool() { return &table_->string_pool; }
 
-  ResourceTableBuilder& SetPackageId(const StringPiece& package_name,
-                                     uint8_t id) {
+  ResourceTableBuilder& SetPackageId(const android::StringPiece& package_name, uint8_t id) {
     ResourceTablePackage* package = table_->CreatePackage(package_name, id);
     CHECK(package != nullptr);
     return *this;
   }
 
-  ResourceTableBuilder& AddSimple(const StringPiece& name,
-                                  const ResourceId& id = {}) {
+  ResourceTableBuilder& AddSimple(const android::StringPiece& name, const ResourceId& id = {}) {
     return AddValue(name, id, util::make_unique<Id>());
   }
 
-  ResourceTableBuilder& AddSimple(const StringPiece& name,
-                                  const ConfigDescription& config,
+  ResourceTableBuilder& AddSimple(const android::StringPiece& name, const ConfigDescription& config,
                                   const ResourceId& id = {}) {
     return AddValue(name, config, id, util::make_unique<Id>());
   }
 
-  ResourceTableBuilder& AddReference(const StringPiece& name,
-                                     const StringPiece& ref) {
+  ResourceTableBuilder& AddReference(const android::StringPiece& name,
+                                     const android::StringPiece& ref) {
     return AddReference(name, {}, ref);
   }
 
-  ResourceTableBuilder& AddReference(const StringPiece& name,
-                                     const ResourceId& id,
-                                     const StringPiece& ref) {
+  ResourceTableBuilder& AddReference(const android::StringPiece& name, const ResourceId& id,
+                                     const android::StringPiece& ref) {
     return AddValue(name, id,
                     util::make_unique<Reference>(ParseNameOrDie(ref)));
   }
 
-  ResourceTableBuilder& AddString(const StringPiece& name,
-                                  const StringPiece& str) {
+  ResourceTableBuilder& AddString(const android::StringPiece& name,
+                                  const android::StringPiece& str) {
     return AddString(name, {}, str);
   }
 
-  ResourceTableBuilder& AddString(const StringPiece& name, const ResourceId& id,
-                                  const StringPiece& str) {
+  ResourceTableBuilder& AddString(const android::StringPiece& name, const ResourceId& id,
+                                  const android::StringPiece& str) {
     return AddValue(
         name, id, util::make_unique<String>(table_->string_pool.MakeRef(str)));
   }
 
-  ResourceTableBuilder& AddString(const StringPiece& name, const ResourceId& id,
+  ResourceTableBuilder& AddString(const android::StringPiece& name, const ResourceId& id,
                                   const ConfigDescription& config,
-                                  const StringPiece& str) {
+                                  const android::StringPiece& str) {
     return AddValue(name, config, id, util::make_unique<String>(
                                           table_->string_pool.MakeRef(str)));
   }
 
-  ResourceTableBuilder& AddFileReference(const StringPiece& name,
-                                         const StringPiece& path) {
+  ResourceTableBuilder& AddFileReference(const android::StringPiece& name,
+                                         const android::StringPiece& path) {
     return AddFileReference(name, {}, path);
   }
 
-  ResourceTableBuilder& AddFileReference(const StringPiece& name,
-                                         const ResourceId& id,
-                                         const StringPiece& path) {
+  ResourceTableBuilder& AddFileReference(const android::StringPiece& name, const ResourceId& id,
+                                         const android::StringPiece& path) {
     return AddValue(name, id, util::make_unique<FileReference>(
                                   table_->string_pool.MakeRef(path)));
   }
 
-  ResourceTableBuilder& AddFileReference(const StringPiece& name,
-                                         const StringPiece& path,
+  ResourceTableBuilder& AddFileReference(const android::StringPiece& name,
+                                         const android::StringPiece& path,
                                          const ConfigDescription& config) {
     return AddValue(name, config, {}, util::make_unique<FileReference>(
                                           table_->string_pool.MakeRef(path)));
   }
 
-  ResourceTableBuilder& AddValue(const StringPiece& name,
-                                 std::unique_ptr<Value> value) {
+  ResourceTableBuilder& AddValue(const android::StringPiece& name, std::unique_ptr<Value> value) {
     return AddValue(name, {}, std::move(value));
   }
 
-  ResourceTableBuilder& AddValue(const StringPiece& name, const ResourceId& id,
+  ResourceTableBuilder& AddValue(const android::StringPiece& name, const ResourceId& id,
                                  std::unique_ptr<Value> value) {
     return AddValue(name, {}, id, std::move(value));
   }
 
-  ResourceTableBuilder& AddValue(const StringPiece& name,
-                                 const ConfigDescription& config,
-                                 const ResourceId& id,
-                                 std::unique_ptr<Value> value) {
+  ResourceTableBuilder& AddValue(const android::StringPiece& name, const ConfigDescription& config,
+                                 const ResourceId& id, std::unique_ptr<Value> value) {
     ResourceName res_name = ParseNameOrDie(name);
     CHECK(table_->AddResourceAllowMangled(res_name, id, config, {},
                                           std::move(value), &diagnostics_));
     return *this;
   }
 
-  ResourceTableBuilder& SetSymbolState(const StringPiece& name,
-                                       const ResourceId& id,
+  ResourceTableBuilder& SetSymbolState(const android::StringPiece& name, const ResourceId& id,
                                        SymbolState state) {
     ResourceName res_name = ParseNameOrDie(name);
     Symbol symbol;
@@ -144,8 +135,8 @@
   std::unique_ptr<ResourceTable> table_ = util::make_unique<ResourceTable>();
 };
 
-inline std::unique_ptr<Reference> BuildReference(
-    const StringPiece& ref, const Maybe<ResourceId>& id = {}) {
+inline std::unique_ptr<Reference> BuildReference(const android::StringPiece& ref,
+                                                 const Maybe<ResourceId>& id = {}) {
   std::unique_ptr<Reference> reference =
       util::make_unique<Reference>(ParseNameOrDie(ref));
   reference->id = id;
@@ -174,7 +165,7 @@
     return *this;
   }
 
-  ValueBuilder& SetComment(const StringPiece& str) {
+  ValueBuilder& SetComment(const android::StringPiece& str) {
     value_->SetComment(str);
     return *this;
   }
@@ -199,7 +190,7 @@
     return *this;
   }
 
-  AttributeBuilder& AddItem(const StringPiece& name, uint32_t value) {
+  AttributeBuilder& AddItem(const android::StringPiece& name, uint32_t value) {
     attr_->symbols.push_back(Attribute::Symbol{
         Reference(ResourceName({}, ResourceType::kId, name)), value});
     return *this;
@@ -217,18 +208,18 @@
  public:
   StyleBuilder() = default;
 
-  StyleBuilder& SetParent(const StringPiece& str) {
+  StyleBuilder& SetParent(const android::StringPiece& str) {
     style_->parent = Reference(ParseNameOrDie(str));
     return *this;
   }
 
-  StyleBuilder& AddItem(const StringPiece& str, std::unique_ptr<Item> value) {
+  StyleBuilder& AddItem(const android::StringPiece& str, std::unique_ptr<Item> value) {
     style_->entries.push_back(
         Style::Entry{Reference(ParseNameOrDie(str)), std::move(value)});
     return *this;
   }
 
-  StyleBuilder& AddItem(const StringPiece& str, const ResourceId& id,
+  StyleBuilder& AddItem(const android::StringPiece& str, const ResourceId& id,
                         std::unique_ptr<Item> value) {
     AddItem(str, std::move(value));
     style_->entries.back().key.id = id;
@@ -247,8 +238,7 @@
  public:
   StyleableBuilder() = default;
 
-  StyleableBuilder& AddItem(const StringPiece& str,
-                            const Maybe<ResourceId>& id = {}) {
+  StyleableBuilder& AddItem(const android::StringPiece& str, const Maybe<ResourceId>& id = {}) {
     styleable_->entries.push_back(Reference(ParseNameOrDie(str)));
     styleable_->entries.back().id = id;
     return *this;
@@ -262,7 +252,7 @@
   std::unique_ptr<Styleable> styleable_ = util::make_unique<Styleable>();
 };
 
-inline std::unique_ptr<xml::XmlResource> BuildXmlDom(const StringPiece& str) {
+inline std::unique_ptr<xml::XmlResource> BuildXmlDom(const android::StringPiece& str) {
   std::stringstream in;
   in << "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n" << str;
   StdErrDiagnostics diag;
@@ -273,7 +263,7 @@
 }
 
 inline std::unique_ptr<xml::XmlResource> BuildXmlDomForPackageName(
-    IAaptContext* context, const StringPiece& str) {
+    IAaptContext* context, const android::StringPiece& str) {
   std::unique_ptr<xml::XmlResource> doc = BuildXmlDom(str);
   doc->file.name.package = context->GetCompilationPackage();
   return doc;
diff --git a/tools/aapt2/test/Common.h b/tools/aapt2/test/Common.h
index 3689201..248921f 100644
--- a/tools/aapt2/test/Common.h
+++ b/tools/aapt2/test/Common.h
@@ -21,6 +21,7 @@
 
 #include "android-base/logging.h"
 #include "android-base/macros.h"
+#include "androidfw/StringPiece.h"
 #include "gtest/gtest.h"
 
 #include "ConfigDescription.h"
@@ -30,7 +31,6 @@
 #include "ValueVisitor.h"
 #include "io/File.h"
 #include "process/IResourceTableConsumer.h"
-#include "util/StringPiece.h"
 
 //
 // GTEST 1.7 doesn't explicitly cast to bool, which causes explicit operators to
@@ -68,23 +68,22 @@
   return &diag;
 }
 
-inline ResourceName ParseNameOrDie(const StringPiece& str) {
+inline ResourceName ParseNameOrDie(const android::StringPiece& str) {
   ResourceNameRef ref;
   CHECK(ResourceUtils::ParseResourceName(str, &ref)) << "invalid resource name";
   return ref.ToResourceName();
 }
 
-inline ConfigDescription ParseConfigOrDie(const StringPiece& str) {
+inline ConfigDescription ParseConfigOrDie(const android::StringPiece& str) {
   ConfigDescription config;
   CHECK(ConfigDescription::Parse(str, &config)) << "invalid configuration";
   return config;
 }
 
 template <typename T>
-T* GetValueForConfigAndProduct(ResourceTable* table,
-                               const StringPiece& res_name,
+T* GetValueForConfigAndProduct(ResourceTable* table, const android::StringPiece& res_name,
                                const ConfigDescription& config,
-                               const StringPiece& product) {
+                               const android::StringPiece& product) {
   Maybe<ResourceTable::SearchResult> result =
       table->FindResource(ParseNameOrDie(res_name));
   if (result) {
@@ -98,19 +97,19 @@
 }
 
 template <typename T>
-T* GetValueForConfig(ResourceTable* table, const StringPiece& res_name,
+T* GetValueForConfig(ResourceTable* table, const android::StringPiece& res_name,
                      const ConfigDescription& config) {
   return GetValueForConfigAndProduct<T>(table, res_name, config, {});
 }
 
 template <typename T>
-T* GetValue(ResourceTable* table, const StringPiece& res_name) {
+T* GetValue(ResourceTable* table, const android::StringPiece& res_name) {
   return GetValueForConfig<T>(table, res_name, {});
 }
 
 class TestFile : public io::IFile {
  public:
-  explicit TestFile(const StringPiece& path) : source_(path) {}
+  explicit TestFile(const android::StringPiece& path) : source_(path) {}
 
   std::unique_ptr<io::IData> OpenAsData() override { return {}; }
 
diff --git a/tools/aapt2/test/Context.h b/tools/aapt2/test/Context.h
index 7986329..63e5f16 100644
--- a/tools/aapt2/test/Context.h
+++ b/tools/aapt2/test/Context.h
@@ -70,8 +70,8 @@
 
 class ContextBuilder {
  public:
-  ContextBuilder& SetCompilationPackage(const StringPiece& package) {
-    context_->compilation_package_ = package.ToString();
+  ContextBuilder& SetCompilationPackage(const android::StringPiece& package) {
+    context_->compilation_package_ = package.to_string();
     return *this;
   }
 
@@ -103,9 +103,8 @@
 
 class StaticSymbolSourceBuilder {
  public:
-  StaticSymbolSourceBuilder& AddPublicSymbol(
-      const StringPiece& name, ResourceId id,
-      std::unique_ptr<Attribute> attr = {}) {
+  StaticSymbolSourceBuilder& AddPublicSymbol(const android::StringPiece& name, ResourceId id,
+                                             std::unique_ptr<Attribute> attr = {}) {
     std::unique_ptr<SymbolTable::Symbol> symbol =
         util::make_unique<SymbolTable::Symbol>(id, std::move(attr), true);
     symbol_source_->name_map_[ParseNameOrDie(name)] = symbol.get();
@@ -114,7 +113,7 @@
     return *this;
   }
 
-  StaticSymbolSourceBuilder& AddSymbol(const StringPiece& name, ResourceId id,
+  StaticSymbolSourceBuilder& AddSymbol(const android::StringPiece& name, ResourceId id,
                                        std::unique_ptr<Attribute> attr = {}) {
     std::unique_ptr<SymbolTable::Symbol> symbol =
         util::make_unique<SymbolTable::Symbol>(id, std::move(attr), false);
diff --git a/tools/aapt2/util/Files.cpp b/tools/aapt2/util/Files.cpp
index f034607..aa840e2 100644
--- a/tools/aapt2/util/Files.cpp
+++ b/tools/aapt2/util/Files.cpp
@@ -35,6 +35,8 @@
 #include <direct.h>
 #endif
 
+using android::StringPiece;
+
 namespace aapt {
 namespace file {
 
@@ -72,10 +74,9 @@
 
 inline static int MkdirImpl(const StringPiece& path) {
 #ifdef _WIN32
-  return _mkdir(path.ToString().c_str());
+  return _mkdir(path.to_string().c_str());
 #else
-  return mkdir(path.ToString().c_str(),
-               S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP);
+  return mkdir(path.to_string().c_str(), S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP);
 #endif
 }
 
@@ -184,7 +185,7 @@
                         std::vector<std::string>* out_arglist,
                         std::string* out_error) {
   std::string contents;
-  if (!android::base::ReadFileToString(path.ToString(), &contents)) {
+  if (!android::base::ReadFileToString(path.to_string(), &contents)) {
     if (out_error) *out_error = "failed to read argument-list file";
     return false;
   }
@@ -192,7 +193,7 @@
   for (StringPiece line : util::Tokenize(contents, ' ')) {
     line = util::TrimWhitespace(line);
     if (!line.empty()) {
-      out_arglist->push_back(line.ToString());
+      out_arglist->push_back(line.to_string());
     }
   }
   return true;
diff --git a/tools/aapt2/util/Files.h b/tools/aapt2/util/Files.h
index a157dbd..95c492f 100644
--- a/tools/aapt2/util/Files.h
+++ b/tools/aapt2/util/Files.h
@@ -22,12 +22,12 @@
 #include <vector>
 
 #include "android-base/macros.h"
+#include "androidfw/StringPiece.h"
 #include "utils/FileMap.h"
 
 #include "Diagnostics.h"
 #include "Maybe.h"
 #include "Source.h"
-#include "util/StringPiece.h"
 
 namespace aapt {
 namespace file {
@@ -50,51 +50,49 @@
   kSocket,
 };
 
-FileType GetFileType(const StringPiece& path);
+FileType GetFileType(const android::StringPiece& path);
 
 /*
  * Appends a path to `base`, separated by the directory separator.
  */
-void AppendPath(std::string* base, StringPiece part);
+void AppendPath(std::string* base, android::StringPiece part);
 
 /*
  * Makes all the directories in `path`. The last element in the path
  * is interpreted as a directory.
  */
-bool mkdirs(const StringPiece& path);
+bool mkdirs(const android::StringPiece& path);
 
 /**
  * Returns all but the last part of the path.
  */
-StringPiece GetStem(const StringPiece& path);
+android::StringPiece GetStem(const android::StringPiece& path);
 
 /**
  * Returns the last part of the path with extension.
  */
-StringPiece GetFilename(const StringPiece& path);
+android::StringPiece GetFilename(const android::StringPiece& path);
 
 /**
  * Returns the extension of the path. This is the entire string after
  * the first '.' of the last part of the path.
  */
-StringPiece GetExtension(const StringPiece& path);
+android::StringPiece GetExtension(const android::StringPiece& path);
 
 /**
  * Converts a package name (com.android.app) to a path: com/android/app
  */
-std::string PackageToPath(const StringPiece& package);
+std::string PackageToPath(const android::StringPiece& package);
 
 /**
  * Creates a FileMap for the file at path.
  */
-Maybe<android::FileMap> MmapPath(const StringPiece& path,
-                                 std::string* out_error);
+Maybe<android::FileMap> MmapPath(const android::StringPiece& path, std::string* out_error);
 
 /**
  * Reads the file at path and appends each line to the outArgList vector.
  */
-bool AppendArgsFromFile(const StringPiece& path,
-                        std::vector<std::string>* out_arglist,
+bool AppendArgsFromFile(const android::StringPiece& path, std::vector<std::string>* out_arglist,
                         std::string* out_error);
 
 /*
@@ -120,7 +118,7 @@
    * - Otherwise the full string is matched.
    * - match is not case-sensitive.
    */
-  bool SetPattern(const StringPiece& pattern);
+  bool SetPattern(const android::StringPiece& pattern);
 
   /**
    * Applies the filter, returning true for pass, false for fail.
diff --git a/tools/aapt2/util/Util.cpp b/tools/aapt2/util/Util.cpp
index d5c0c8a..cf22322 100644
--- a/tools/aapt2/util/Util.cpp
+++ b/tools/aapt2/util/Util.cpp
@@ -15,9 +15,6 @@
  */
 
 #include "util/Util.h"
-#include "util/BigBuffer.h"
-#include "util/Maybe.h"
-#include "util/StringPiece.h"
 
 #include <utils/Unicode.h>
 #include <algorithm>
@@ -25,6 +22,14 @@
 #include <string>
 #include <vector>
 
+#include "androidfw/StringPiece.h"
+
+#include "util/BigBuffer.h"
+#include "util/Maybe.h"
+
+using android::StringPiece;
+using android::StringPiece16;
+
 namespace aapt {
 namespace util {
 
@@ -36,7 +41,7 @@
   StringPiece::const_iterator current;
   do {
     current = std::find(start, end, sep);
-    parts.emplace_back(str.substr(start, current).ToString());
+    parts.emplace_back(str.substr(start, current).to_string());
     if (f) {
       std::string& part = parts.back();
       std::transform(part.begin(), part.end(), part.begin(), f);
@@ -162,7 +167,7 @@
   }
 
   if (util::IsJavaClassName(classname)) {
-    return classname.ToString();
+    return classname.to_string();
   }
 
   if (package.empty()) {
diff --git a/tools/aapt2/util/Util.h b/tools/aapt2/util/Util.h
index 05e9cc5..f8fa80e 100644
--- a/tools/aapt2/util/Util.h
+++ b/tools/aapt2/util/Util.h
@@ -24,11 +24,11 @@
 #include <vector>
 
 #include "androidfw/ResourceTypes.h"
+#include "androidfw/StringPiece.h"
 #include "utils/ByteOrder.h"
 
 #include "util/BigBuffer.h"
 #include "util/Maybe.h"
-#include "util/StringPiece.h"
 
 #ifdef _WIN32
 // TODO(adamlesinski): remove once http://b/32447322 is resolved.
@@ -44,26 +44,24 @@
 namespace aapt {
 namespace util {
 
-std::vector<std::string> Split(const StringPiece& str, char sep);
-std::vector<std::string> SplitAndLowercase(const StringPiece& str, char sep);
+std::vector<std::string> Split(const android::StringPiece& str, char sep);
+std::vector<std::string> SplitAndLowercase(const android::StringPiece& str, char sep);
 
 /**
  * Returns true if the string starts with prefix.
  */
-bool StartsWith(const StringPiece& str, const StringPiece& prefix);
+bool StartsWith(const android::StringPiece& str, const android::StringPiece& prefix);
 
 /**
  * Returns true if the string ends with suffix.
  */
-bool EndsWith(const StringPiece& str, const StringPiece& suffix);
+bool EndsWith(const android::StringPiece& str, const android::StringPiece& suffix);
 
 /**
  * Creates a new StringPiece16 that points to a substring
  * of the original string without leading or trailing whitespace.
  */
-StringPiece TrimWhitespace(const StringPiece& str);
-
-StringPiece TrimWhitespace(const StringPiece& str);
+android::StringPiece TrimWhitespace(const android::StringPiece& str);
 
 /**
  * UTF-16 isspace(). It basically checks for lower range characters that are
@@ -75,18 +73,18 @@
  * Returns an iterator to the first character that is not alpha-numeric and that
  * is not in the allowedChars set.
  */
-StringPiece::const_iterator FindNonAlphaNumericAndNotInSet(
-    const StringPiece& str, const StringPiece& allowed_chars);
+android::StringPiece::const_iterator FindNonAlphaNumericAndNotInSet(
+    const android::StringPiece& str, const android::StringPiece& allowed_chars);
 
 /**
  * Tests that the string is a valid Java class name.
  */
-bool IsJavaClassName(const StringPiece& str);
+bool IsJavaClassName(const android::StringPiece& str);
 
 /**
  * Tests that the string is a valid Java package name.
  */
-bool IsJavaPackageName(const StringPiece& str);
+bool IsJavaPackageName(const android::StringPiece& str);
 
 /**
  * Converts the class name to a fully qualified class name from the given
@@ -97,8 +95,8 @@
  * .a.b         --> package.a.b
  * asdf.adsf    --> asdf.adsf
  */
-Maybe<std::string> GetFullyQualifiedClassName(const StringPiece& package,
-                                              const StringPiece& class_name);
+Maybe<std::string> GetFullyQualifiedClassName(const android::StringPiece& package,
+                                              const android::StringPiece& class_name);
 
 /**
  * Makes a std::unique_ptr<> with the template parameter inferred by the
@@ -138,7 +136,7 @@
  * stored as UTF-8,
  * the conversion to UTF-16 happens within ResStringPool.
  */
-StringPiece16 GetString16(const android::ResStringPool& pool, size_t idx);
+android::StringPiece16 GetString16(const android::ResStringPool& pool, size_t idx);
 
 /**
  * Helper method to extract a UTF-8 string from a StringPool. If the string is
@@ -159,11 +157,11 @@
  * which will
  * break the string interpolation.
  */
-bool VerifyJavaStringFormat(const StringPiece& str);
+bool VerifyJavaStringFormat(const android::StringPiece& str);
 
 class StringBuilder {
  public:
-  StringBuilder& Append(const StringPiece& str);
+  StringBuilder& Append(const android::StringPiece& str);
   const std::string& ToString() const;
   const std::string& Error() const;
 
@@ -194,8 +192,8 @@
 /**
  * Converts a UTF8 string to a UTF16 string.
  */
-std::u16string Utf8ToUtf16(const StringPiece& utf8);
-std::string Utf16ToUtf8(const StringPiece16& utf16);
+std::u16string Utf8ToUtf16(const android::StringPiece& utf8);
+std::string Utf16ToUtf8(const android::StringPiece16& utf16);
 
 /**
  * Writes the entire BigBuffer to the output stream.
@@ -220,22 +218,22 @@
 
     iterator& operator++();
 
-    StringPiece operator*() { return token_; }
+    android::StringPiece operator*() { return token_; }
     bool operator==(const iterator& rhs) const;
     bool operator!=(const iterator& rhs) const;
 
    private:
     friend class Tokenizer;
 
-    iterator(StringPiece s, char sep, StringPiece tok, bool end);
+    iterator(android::StringPiece s, char sep, android::StringPiece tok, bool end);
 
-    StringPiece str_;
+    android::StringPiece str_;
     char separator_;
-    StringPiece token_;
+    android::StringPiece token_;
     bool end_;
   };
 
-  Tokenizer(StringPiece str, char sep);
+  Tokenizer(android::StringPiece str, char sep);
 
   iterator begin() { return begin_; }
 
@@ -246,9 +244,7 @@
   const iterator end_;
 };
 
-inline Tokenizer Tokenize(const StringPiece& str, char sep) {
-  return Tokenizer(str, sep);
-}
+inline Tokenizer Tokenize(const android::StringPiece& str, char sep) { return Tokenizer(str, sep); }
 
 inline uint16_t HostToDevice16(uint16_t value) { return htods(value); }
 
@@ -267,8 +263,8 @@
  *
  * Returns true if successful.
  */
-bool ExtractResFilePathParts(const StringPiece& path, StringPiece* out_prefix,
-                             StringPiece* out_entry, StringPiece* out_suffix);
+bool ExtractResFilePathParts(const android::StringPiece& path, android::StringPiece* out_prefix,
+                             android::StringPiece* out_entry, android::StringPiece* out_suffix);
 
 }  // namespace util
 
diff --git a/tools/aapt2/util/Util_test.cpp b/tools/aapt2/util/Util_test.cpp
index cac3de4..e49aee5 100644
--- a/tools/aapt2/util/Util_test.cpp
+++ b/tools/aapt2/util/Util_test.cpp
@@ -20,6 +20,8 @@
 
 #include "test/Test.h"
 
+using android::StringPiece;
+
 namespace aapt {
 
 TEST(UtilTest, TrimOnlyWhitespace) {
diff --git a/tools/aapt2/xml/XmlDom.cpp b/tools/aapt2/xml/XmlDom.cpp
index 960d361..fab2f19 100644
--- a/tools/aapt2/xml/XmlDom.cpp
+++ b/tools/aapt2/xml/XmlDom.cpp
@@ -29,6 +29,9 @@
 #include "XmlPullParser.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+using android::StringPiece16;
+
 namespace aapt {
 namespace xml {
 
@@ -52,10 +55,10 @@
 
   if (*p == 0) {
     out_ns->clear();
-    *out_name = StringPiece(name).ToString();
+    out_name->assign(name);
   } else {
-    *out_ns = StringPiece(name, (p - name)).ToString();
-    *out_name = StringPiece(p + 1).ToString();
+    out_ns->assign(name, (p - name));
+    out_name->assign(p + 1);
   }
 }
 
@@ -83,11 +86,11 @@
 
   std::unique_ptr<Namespace> ns = util::make_unique<Namespace>();
   if (prefix) {
-    ns->namespace_prefix = StringPiece(prefix).ToString();
+    ns->namespace_prefix = prefix;
   }
 
   if (uri) {
-    ns->namespace_uri = StringPiece(uri).ToString();
+    ns->namespace_uri = uri;
   }
 
   AddToStack(stack, parser, std::move(ns));
@@ -117,7 +120,7 @@
   while (*attrs) {
     Attribute attribute;
     SplitName(*attrs++, &attribute.namespace_uri, &attribute.name);
-    attribute.value = StringPiece(*attrs++).ToString();
+    attribute.value = *attrs++;
 
     // Insert in sorted order.
     auto iter = std::lower_bound(el->attributes.begin(), el->attributes.end(),
@@ -153,14 +156,14 @@
     if (!currentParent->children.empty()) {
       Node* last_child = currentParent->children.back().get();
       if (Text* text = NodeCast<Text>(last_child)) {
-        text->text += StringPiece(s, len).ToString();
+        text->text.append(s, len);
         return;
       }
     }
   }
 
   std::unique_ptr<Text> text = util::make_unique<Text>();
-  text->text = StringPiece(s, len).ToString();
+  text->text.assign(s, len);
   AddToStack(stack, parser, std::move(text));
 }
 
@@ -495,15 +498,14 @@
 Maybe<ExtractedPackage> PackageAwareVisitor::TransformPackageAlias(
     const StringPiece& alias, const StringPiece& local_package) const {
   if (alias.empty()) {
-    return ExtractedPackage{local_package.ToString(), false /* private */};
+    return ExtractedPackage{local_package.to_string(), false /* private */};
   }
 
   const auto rend = package_decls_.rend();
   for (auto iter = package_decls_.rbegin(); iter != rend; ++iter) {
     if (alias == iter->prefix) {
       if (iter->package.package.empty()) {
-        return ExtractedPackage{local_package.ToString(),
-                                iter->package.private_namespace};
+        return ExtractedPackage{local_package.to_string(), iter->package.private_namespace};
       }
       return iter->package;
     }
diff --git a/tools/aapt2/xml/XmlDom.h b/tools/aapt2/xml/XmlDom.h
index 720fe35..90cdfb6 100644
--- a/tools/aapt2/xml/XmlDom.h
+++ b/tools/aapt2/xml/XmlDom.h
@@ -22,10 +22,11 @@
 #include <string>
 #include <vector>
 
+#include "androidfw/StringPiece.h"
+
 #include "Diagnostics.h"
 #include "Resource.h"
 #include "ResourceValues.h"
-#include "util/StringPiece.h"
 #include "util/Util.h"
 #include "xml/XmlUtil.h"
 
@@ -100,13 +101,13 @@
   std::string name;
   std::vector<Attribute> attributes;
 
-  Attribute* FindAttribute(const StringPiece& ns, const StringPiece& name);
-  xml::Element* FindChild(const StringPiece& ns, const StringPiece& name);
-  xml::Element* FindChildWithAttribute(const StringPiece& ns,
-                                       const StringPiece& name,
-                                       const StringPiece& attr_ns,
-                                       const StringPiece& attr_name,
-                                       const StringPiece& attr_value);
+  Attribute* FindAttribute(const android::StringPiece& ns, const android::StringPiece& name);
+  xml::Element* FindChild(const android::StringPiece& ns, const android::StringPiece& name);
+  xml::Element* FindChildWithAttribute(const android::StringPiece& ns,
+                                       const android::StringPiece& name,
+                                       const android::StringPiece& attr_ns,
+                                       const android::StringPiece& attr_name,
+                                       const android::StringPiece& attr_value);
   std::vector<xml::Element*> GetChildElements();
   std::unique_ptr<Node> Clone() override;
 };
@@ -190,8 +191,7 @@
 
   void Visit(Namespace* ns) override;
   Maybe<ExtractedPackage> TransformPackageAlias(
-      const StringPiece& alias,
-      const StringPiece& local_package) const override;
+      const android::StringPiece& alias, const android::StringPiece& local_package) const override;
 
  private:
   struct PackageDecl {
diff --git a/tools/aapt2/xml/XmlPullParser.cpp b/tools/aapt2/xml/XmlPullParser.cpp
index e59fa86..c2a9c82 100644
--- a/tools/aapt2/xml/XmlPullParser.cpp
+++ b/tools/aapt2/xml/XmlPullParser.cpp
@@ -22,6 +22,8 @@
 #include "xml/XmlPullParser.h"
 #include "xml/XmlUtil.h"
 
+using android::StringPiece;
+
 namespace aapt {
 namespace xml {
 
@@ -136,15 +138,14 @@
 Maybe<ExtractedPackage> XmlPullParser::TransformPackageAlias(
     const StringPiece& alias, const StringPiece& local_package) const {
   if (alias.empty()) {
-    return ExtractedPackage{local_package.ToString(), false /* private */};
+    return ExtractedPackage{local_package.to_string(), false /* private */};
   }
 
   const auto end_iter = package_aliases_.rend();
   for (auto iter = package_aliases_.rbegin(); iter != end_iter; ++iter) {
     if (alias == iter->prefix) {
       if (iter->package.package.empty()) {
-        return ExtractedPackage{local_package.ToString(),
-                                iter->package.private_namespace};
+        return ExtractedPackage{local_package.to_string(), iter->package.private_namespace};
       }
       return iter->package;
     }
@@ -188,19 +189,18 @@
 /**
  * Extracts the namespace and name of an expanded element or attribute name.
  */
-static void SplitName(const char* name, std::string& out_ns,
-                      std::string& out_name) {
+static void SplitName(const char* name, std::string* out_ns, std::string* out_name) {
   const char* p = name;
   while (*p != 0 && *p != kXmlNamespaceSep) {
     p++;
   }
 
   if (*p == 0) {
-    out_ns = std::string();
-    out_name = name;
+    out_ns->clear();
+    out_name->assign(name);
   } else {
-    out_ns = StringPiece(name, (p - name)).ToString();
-    out_name = p + 1;
+    out_ns->assign(name, (p - name));
+    out_name->assign(p + 1);
   }
 }
 
@@ -224,11 +224,11 @@
   EventData data = {Event::kStartElement,
                     XML_GetCurrentLineNumber(parser->parser_),
                     parser->depth_++};
-  SplitName(name, data.data1, data.data2);
+  SplitName(name, &data.data1, &data.data2);
 
   while (*attrs) {
     Attribute attribute;
-    SplitName(*attrs++, attribute.namespace_uri, attribute.name);
+    SplitName(*attrs++, &attribute.namespace_uri, &attribute.name);
     attribute.value = *attrs++;
 
     // Insert in sorted order.
@@ -245,9 +245,8 @@
                                                  int len) {
   XmlPullParser* parser = reinterpret_cast<XmlPullParser*>(user_data);
 
-  parser->event_queue_.push(
-      EventData{Event::kText, XML_GetCurrentLineNumber(parser->parser_),
-                parser->depth_, StringPiece(s, len).ToString()});
+  parser->event_queue_.push(EventData{Event::kText, XML_GetCurrentLineNumber(parser->parser_),
+                                      parser->depth_, std::string(s, len)});
 }
 
 void XMLCALL XmlPullParser::EndElementHandler(void* user_data,
@@ -257,7 +256,7 @@
   EventData data = {Event::kEndElement,
                     XML_GetCurrentLineNumber(parser->parser_),
                     --(parser->depth_)};
-  SplitName(name, data.data1, data.data2);
+  SplitName(name, &data.data1, &data.data2);
 
   // Move the data into the queue (no copy).
   parser->event_queue_.push(std::move(data));
diff --git a/tools/aapt2/xml/XmlPullParser.h b/tools/aapt2/xml/XmlPullParser.h
index ff58d60..cdeeefd 100644
--- a/tools/aapt2/xml/XmlPullParser.h
+++ b/tools/aapt2/xml/XmlPullParser.h
@@ -28,11 +28,11 @@
 #include <vector>
 
 #include "android-base/macros.h"
+#include "androidfw/StringPiece.h"
 
 #include "Resource.h"
 #include "process/IResourceTableConsumer.h"
 #include "util/Maybe.h"
-#include "util/StringPiece.h"
 #include "xml/XmlUtil.h"
 
 namespace aapt {
@@ -119,8 +119,7 @@
    * 'package' will be set to 'defaultPackage'.
    */
   Maybe<ExtractedPackage> TransformPackageAlias(
-      const StringPiece& alias,
-      const StringPiece& local_package) const override;
+      const android::StringPiece& alias, const android::StringPiece& local_package) const override;
 
   //
   // Remaining methods are for retrieving information about attributes
@@ -146,8 +145,7 @@
   const_iterator begin_attributes() const;
   const_iterator end_attributes() const;
   size_t attribute_count() const;
-  const_iterator FindAttribute(StringPiece namespace_uri,
-                               StringPiece name) const;
+  const_iterator FindAttribute(android::StringPiece namespace_uri, android::StringPiece name) const;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(XmlPullParser);
@@ -190,16 +188,16 @@
 /**
  * Finds the attribute in the current element within the global namespace.
  */
-Maybe<StringPiece> FindAttribute(const XmlPullParser* parser,
-                                 const StringPiece& name);
+Maybe<android::StringPiece> FindAttribute(const XmlPullParser* parser,
+                                          const android::StringPiece& name);
 
 /**
  * Finds the attribute in the current element within the global namespace. The
  * attribute's value
  * must not be the empty string.
  */
-Maybe<StringPiece> FindNonEmptyAttribute(const XmlPullParser* parser,
-                                         const StringPiece& name);
+Maybe<android::StringPiece> FindNonEmptyAttribute(const XmlPullParser* parser,
+                                                  const android::StringPiece& name);
 
 //
 // Implementation
@@ -299,13 +297,13 @@
 }
 
 inline XmlPullParser::const_iterator XmlPullParser::FindAttribute(
-    StringPiece namespace_uri, StringPiece name) const {
+    android::StringPiece namespace_uri, android::StringPiece name) const {
   const auto end_iter = end_attributes();
   const auto iter = std::lower_bound(
       begin_attributes(), end_iter,
-      std::pair<StringPiece, StringPiece>(namespace_uri, name),
+      std::pair<android::StringPiece, android::StringPiece>(namespace_uri, name),
       [](const Attribute& attr,
-         const std::pair<StringPiece, StringPiece>& rhs) -> bool {
+         const std::pair<android::StringPiece, android::StringPiece>& rhs) -> bool {
         int cmp = attr.namespace_uri.compare(
             0, attr.namespace_uri.size(), rhs.first.data(), rhs.first.size());
         if (cmp < 0) return true;
diff --git a/tools/aapt2/xml/XmlPullParser_test.cpp b/tools/aapt2/xml/XmlPullParser_test.cpp
index 4f18cd2..1cce485 100644
--- a/tools/aapt2/xml/XmlPullParser_test.cpp
+++ b/tools/aapt2/xml/XmlPullParser_test.cpp
@@ -18,8 +18,11 @@
 
 #include <sstream>
 
+#include "androidfw/StringPiece.h"
+
 #include "test/Test.h"
-#include "util/StringPiece.h"
+
+using android::StringPiece;
 
 namespace aapt {
 
diff --git a/tools/aapt2/xml/XmlUtil.cpp b/tools/aapt2/xml/XmlUtil.cpp
index d00f7f2..fb8cee8 100644
--- a/tools/aapt2/xml/XmlUtil.cpp
+++ b/tools/aapt2/xml/XmlUtil.cpp
@@ -21,6 +21,8 @@
 #include "util/Maybe.h"
 #include "util/Util.h"
 
+using android::StringPiece;
+
 namespace aapt {
 namespace xml {
 
@@ -42,7 +44,7 @@
     if (package.empty()) {
       return {};
     }
-    return ExtractedPackage{package.ToString(), false /* is_private */};
+    return ExtractedPackage{package.to_string(), false /* is_private */};
 
   } else if (util::StartsWith(namespace_uri, kSchemaPrivatePrefix)) {
     StringPiece schema_prefix = kSchemaPrivatePrefix;
@@ -52,7 +54,7 @@
     if (package.empty()) {
       return {};
     }
-    return ExtractedPackage{package.ToString(), true /* is_private */};
+    return ExtractedPackage{package.to_string(), true /* is_private */};
 
   } else if (namespace_uri == kSchemaAuto) {
     return ExtractedPackage{std::string(), true /* is_private */};
diff --git a/tools/aapt2/xml/XmlUtil.h b/tools/aapt2/xml/XmlUtil.h
index 5365401..1650ac2 100644
--- a/tools/aapt2/xml/XmlUtil.h
+++ b/tools/aapt2/xml/XmlUtil.h
@@ -74,7 +74,7 @@
  *
  * http://schemas.android.com/apk/prv/res/<package>
  */
-std::string BuildPackageNamespace(const StringPiece& package,
+std::string BuildPackageNamespace(const android::StringPiece& package,
                                   bool private_reference = false);
 
 /**
@@ -90,7 +90,7 @@
    * package declaration.
    */
   virtual Maybe<ExtractedPackage> TransformPackageAlias(
-      const StringPiece& alias, const StringPiece& local_package) const = 0;
+      const android::StringPiece& alias, const android::StringPiece& local_package) const = 0;
 };
 
 /**
@@ -100,8 +100,7 @@
  * the namespace of the package declaration was private.
  */
 void TransformReferenceFromNamespace(IPackageDeclStack* decl_stack,
-                                     const StringPiece& local_package,
-                                     Reference* in_ref);
+                                     const android::StringPiece& local_package, Reference* in_ref);
 
 }  // namespace xml
 }  // namespace aapt
diff --git a/wifi/java/android/net/wifi/WifiNetworkScoreCache.java b/wifi/java/android/net/wifi/WifiNetworkScoreCache.java
index 71124bb..36e4717 100755
--- a/wifi/java/android/net/wifi/WifiNetworkScoreCache.java
+++ b/wifi/java/android/net/wifi/WifiNetworkScoreCache.java
@@ -43,7 +43,7 @@
  */
 public class WifiNetworkScoreCache extends INetworkScoreCache.Stub {
     private static final String TAG = "WifiNetworkScoreCache";
-    private static final boolean DBG = false;
+    private static final boolean DBG = Log.isLoggable(TAG, Log.DEBUG);
 
     // A Network scorer returns a score in the range [-128, +127]
     // We treat the lowest possible score as though there were no score, effectively allowing the
@@ -83,18 +83,28 @@
         if (networks == null || networks.isEmpty()) {
            return;
         }
-        Log.d(TAG, "updateScores list size=" + networks.size());
+        if (DBG) {
+            Log.d(TAG, "updateScores list size=" + networks.size());
+        }
+
+        boolean changed = false;
 
         synchronized(mNetworkCache) {
             for (ScoredNetwork network : networks) {
                 String networkKey = buildNetworkKey(network);
-                if (networkKey == null) continue;
+                if (networkKey == null) {
+                    if (DBG) {
+                        Log.d(TAG, "Failed to build network key for ScoredNetwork" + network);
+                    }
+                    continue;
+                }
                 mNetworkCache.put(networkKey, network);
+                changed = true;
             }
         }
 
         synchronized (mCacheLock) {
-            if (mListener != null) {
+            if (mListener != null && changed) {
                 mListener.post(networks);
             }
         }
@@ -170,25 +180,49 @@
         return score;
     }
 
-    private ScoredNetwork getScoredNetwork(ScanResult result) {
+    @Nullable
+    public ScoredNetwork getScoredNetwork(ScanResult result) {
         String key = buildNetworkKey(result);
         if (key == null) return null;
 
-        //find it
         synchronized(mNetworkCache) {
             ScoredNetwork network = mNetworkCache.get(key);
             return network;
         }
     }
 
-     private String buildNetworkKey(ScoredNetwork network) {
-        if (network == null || network.networkKey == null) return null;
-        if (network.networkKey.wifiKey == null) return null;
-        if (network.networkKey.type == NetworkKey.TYPE_WIFI) {
-            String key = network.networkKey.wifiKey.ssid;
+    /** Returns the ScoredNetwork for the given key. */
+    @Nullable
+    public ScoredNetwork getScoredNetwork(NetworkKey networkKey) {
+        String key = buildNetworkKey(networkKey);
+        if (key == null) {
+            if (DBG) {
+                Log.d(TAG, "Could not build key string for Network Key: " + networkKey);
+            }
+            return null;
+        }
+        synchronized (mNetworkCache) {
+            return mNetworkCache.get(key);
+        }
+    }
+
+    private String buildNetworkKey(ScoredNetwork network) {
+        if (network == null) {
+            return null;
+        }
+        return buildNetworkKey(network.networkKey);
+    }
+
+    private String buildNetworkKey(NetworkKey networkKey) {
+        if (networkKey == null) {
+            return null;
+        }
+        if (networkKey.wifiKey == null) return null;
+        if (networkKey.type == NetworkKey.TYPE_WIFI) {
+            String key = networkKey.wifiKey.ssid;
             if (key == null) return null;
-            if (network.networkKey.wifiKey.bssid != null) {
-                key = key + network.networkKey.wifiKey.bssid;
+            if (networkKey.wifiKey.bssid != null) {
+                key = key + networkKey.wifiKey.bssid;
             }
             return key;
         }