diff --git a/services/core/java/com/android/server/am/ActivityManagerConstants.java b/services/core/java/com/android/server/am/ActivityManagerConstants.java
index 6550d06..9bf72fb 100644
--- a/services/core/java/com/android/server/am/ActivityManagerConstants.java
+++ b/services/core/java/com/android/server/am/ActivityManagerConstants.java
@@ -207,6 +207,10 @@
     // Indicates if the processes need to be started asynchronously.
     public boolean FLAG_PROCESS_START_ASYNC = DEFAULT_PROCESS_START_ASYNC;
 
+    // Indicates whether the activity starts logging is enabled.
+    // Controlled by Settings.Global.ACTIVITY_STARTS_LOGGING_ENABLED
+    boolean mFlagActivityStartsLoggingEnabled;
+
     private final ActivityManagerService mService;
     private ContentResolver mResolver;
     private final KeyValueListParser mParser = new KeyValueListParser(',');
@@ -235,6 +239,12 @@
     // memory trimming.
     public int CUR_TRIM_CACHED_PROCESSES;
 
+    private static final Uri ACTIVITY_MANAGER_CONSTANTS_URI = Settings.Global.getUriFor(
+                Settings.Global.ACTIVITY_MANAGER_CONSTANTS);
+
+    private static final Uri ACTIVITY_STARTS_LOGGING_ENABLED_URI = Settings.Global.getUriFor(
+                Settings.Global.ACTIVITY_STARTS_LOGGING_ENABLED);
+
     public ActivityManagerConstants(ActivityManagerService service, Handler handler) {
         super(handler);
         mService = service;
@@ -243,9 +253,10 @@
 
     public void start(ContentResolver resolver) {
         mResolver = resolver;
-        mResolver.registerContentObserver(Settings.Global.getUriFor(
-                Settings.Global.ACTIVITY_MANAGER_CONSTANTS), false, this);
+        mResolver.registerContentObserver(ACTIVITY_MANAGER_CONSTANTS_URI, false, this);
+        mResolver.registerContentObserver(ACTIVITY_STARTS_LOGGING_ENABLED_URI, false, this);
         updateConstants();
+        updateActivityStartsLoggingEnabled();
     }
 
     public void setOverrideMaxCachedProcesses(int value) {
@@ -263,7 +274,12 @@
 
     @Override
     public void onChange(boolean selfChange, Uri uri) {
-        updateConstants();
+        if (uri == null) return;
+        if (ACTIVITY_MANAGER_CONSTANTS_URI.equals(uri)) {
+            updateConstants();
+        } else if (ACTIVITY_STARTS_LOGGING_ENABLED_URI.equals(uri)) {
+            updateActivityStartsLoggingEnabled();
+        }
     }
 
     private void updateConstants() {
@@ -337,6 +353,11 @@
         }
     }
 
+    private void updateActivityStartsLoggingEnabled() {
+        mFlagActivityStartsLoggingEnabled = Settings.Global.getInt(mResolver,
+                Settings.Global.ACTIVITY_STARTS_LOGGING_ENABLED, 0) == 1;
+    }
+
     private void updateMaxCachedProcesses() {
         CUR_MAX_CACHED_PROCESSES = mOverrideMaxCachedProcesses < 0
                 ? MAX_CACHED_PROCESSES : mOverrideMaxCachedProcesses;
diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index a660040..680f170 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -7216,6 +7216,20 @@
                 || mPendingTempWhitelist.indexOfKey(uid) >= 0;
     }
 
+    /**
+     * @return whitelist tag for a uid from mPendingTempWhitelist, null if not currently on
+     * the whitelist
+     */
+    String getPendingTempWhitelistTagForUidLocked(int uid) {
+        final PendingTempWhitelist ptw = mPendingTempWhitelist.get(uid);
+        return ptw != null ? ptw.tag : null;
+    }
+
+    @VisibleForTesting
+    boolean isActivityStartsLoggingEnabled() {
+        return mConstants.mFlagActivityStartsLoggingEnabled;
+    }
+
     private ProviderInfo getProviderInfoLocked(String authority, int userHandle, int pmFlags) {
         ProviderInfo pi = null;
         ContentProviderRecord cpr = mProviderMap.getProviderByName(authority, userHandle);
diff --git a/services/core/java/com/android/server/am/ActivityMetricsLogger.java b/services/core/java/com/android/server/am/ActivityMetricsLogger.java
index d3e3af3..263c34f 100644
--- a/services/core/java/com/android/server/am/ActivityMetricsLogger.java
+++ b/services/core/java/com/android/server/am/ActivityMetricsLogger.java
@@ -2,6 +2,7 @@
 
 import static android.app.ActivityManager.START_SUCCESS;
 import static android.app.ActivityManager.START_TASK_TO_FRONT;
+import static android.app.ActivityManager.processStateAmToProto;
 import static com.android.server.wm.ActivityTaskManagerInternal.APP_TRANSITION_TIMEOUT;
 import static android.app.WindowConfiguration.WINDOWING_MODE_SPLIT_SCREEN_PRIMARY;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;
@@ -9,6 +10,7 @@
 import static android.app.WindowConfiguration.WINDOWING_MODE_PINNED;
 import static android.app.WindowConfiguration.WINDOWING_MODE_SPLIT_SCREEN_SECONDARY;
 import static android.app.WindowConfiguration.WINDOWING_MODE_UNDEFINED;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.ACTION_ACTIVITY_START;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_BIND_APPLICATION_DELAY_MS;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_CALLING_PACKAGE_NAME;
@@ -21,8 +23,48 @@
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_REPORTED_DRAWN_MS;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_STARTING_WINDOW_DELAY_MS;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_WINDOWS_DRAWN_DELAY_MS;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_FLAGS;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_IS_FULLSCREEN;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_IS_NO_DISPLAY;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_IS_VISIBLE;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_IS_VISIBLE_IGNORING_KEYGUARD;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_MILLIS_SINCE_LAST_LAUNCH;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_MILLIS_SINCE_LAST_VISIBLE;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_LAUNCH_MODE;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_PROCESS_NAME;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_REAL_ACTIVITY;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_RESULT_TO_PKG_NAME;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_RESULT_TO_SHORT_COMPONENT_NAME;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_SHORT_COMPONENT_NAME;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_ACTIVITY_RECORD_TARGET_ACTIVITY;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CALLING_PACKAGE_NAME;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CALLING_UID;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CALLING_UID_HAS_ANY_VISIBLE_WINDOW;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CALLING_UID_PROC_STATE;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CLASS_NAME;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_COMING_FROM_PENDING_INTENT;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_INSTANT_APP_LAUNCH_TOKEN;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_INTENT_ACTION;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_CUR_PROC_STATE;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_HAS_CLIENT_ACTIVITIES;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_HAS_FOREGROUND_ACTIVITIES;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_HAS_FOREGROUND_SERVICES;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_HAS_OVERLAY_UI;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_HAS_TOP_UI;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_MILLIS_SINCE_FG_INTERACTION;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_MILLIS_SINCE_LAST_INTERACTION_EVENT;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_MILLIS_SINCE_UNIMPORTANT;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_PENDING_UI_CLEAN;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_PROCESS_NAME;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_REAL_CALLING_UID;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_REAL_CALLING_UID_PROC_STATE;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_REAL_CALLING_UID_HAS_ANY_VISIBLE_WINDOW;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_TARGET_PACKAGE_NAME;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_TARGET_SHORT_COMPONENT_NAME;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_TARGET_UID;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_TARGET_UID_HAS_ANY_VISIBLE_WINDOW;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_TARGET_UID_PROC_STATE;
+import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_TARGET_WHITELIST_TAG;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.PACKAGE_OPTIMIZATION_COMPILATION_REASON;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.PACKAGE_OPTIMIZATION_COMPILATION_FILTER;
 import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.TYPE_TRANSITION_COLD_LAUNCH;
@@ -37,6 +79,7 @@
 import static com.android.server.am.MemoryStatUtil.readMemoryStatFromFilesystem;
 
 import android.content.Context;
+import android.content.Intent;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.dex.ArtManagerInternal;
 import android.content.pm.dex.PackageOptimizationInfo;
@@ -612,6 +655,95 @@
                 startupTimeMs);
     }
 
+    void logActivityStart(Intent intent, ProcessRecord callerApp, ActivityRecord r,
+            int callingUid, String callingPackage, int callingUidProcState,
+            boolean callingUidHasAnyVisibleWindow,
+            int realCallingUid, int realCallingUidProcState,
+            boolean realCallingUidHasAnyVisibleWindow,
+            int targetUid, String targetPackage, int targetUidProcState,
+            boolean targetUidHasAnyVisibleWindow, String targetWhitelistTag,
+            boolean comingFromPendingIntent) {
+
+        final long nowElapsed = SystemClock.elapsedRealtime();
+        final long nowUptime = SystemClock.uptimeMillis();
+        final LogMaker builder = new LogMaker(ACTION_ACTIVITY_START);
+        builder.setTimestamp(System.currentTimeMillis());
+        builder.addTaggedData(FIELD_CALLING_UID, callingUid);
+        builder.addTaggedData(FIELD_CALLING_PACKAGE_NAME, callingPackage);
+        builder.addTaggedData(FIELD_CALLING_UID_PROC_STATE,
+                processStateAmToProto(callingUidProcState));
+        builder.addTaggedData(FIELD_CALLING_UID_HAS_ANY_VISIBLE_WINDOW,
+                callingUidHasAnyVisibleWindow ? 1 : 0);
+        builder.addTaggedData(FIELD_REAL_CALLING_UID, realCallingUid);
+        builder.addTaggedData(FIELD_REAL_CALLING_UID_PROC_STATE,
+                processStateAmToProto(realCallingUidProcState));
+        builder.addTaggedData(FIELD_REAL_CALLING_UID_HAS_ANY_VISIBLE_WINDOW,
+                realCallingUidHasAnyVisibleWindow ? 1 : 0);
+        builder.addTaggedData(FIELD_TARGET_UID, targetUid);
+        builder.addTaggedData(FIELD_TARGET_PACKAGE_NAME, targetPackage);
+        builder.addTaggedData(FIELD_TARGET_UID_PROC_STATE,
+                processStateAmToProto(targetUidProcState));
+        builder.addTaggedData(FIELD_TARGET_UID_HAS_ANY_VISIBLE_WINDOW,
+                targetUidHasAnyVisibleWindow ? 1 : 0);
+        builder.addTaggedData(FIELD_TARGET_WHITELIST_TAG, targetWhitelistTag);
+        builder.addTaggedData(FIELD_TARGET_SHORT_COMPONENT_NAME, r.shortComponentName);
+        builder.addTaggedData(FIELD_COMING_FROM_PENDING_INTENT, comingFromPendingIntent ? 1 : 0);
+        builder.addTaggedData(FIELD_INTENT_ACTION, intent.getAction());
+        if (callerApp != null) {
+            builder.addTaggedData(FIELD_PROCESS_RECORD_PROCESS_NAME, callerApp.processName);
+            builder.addTaggedData(FIELD_PROCESS_RECORD_CUR_PROC_STATE,
+                    processStateAmToProto(callerApp.curProcState));
+            builder.addTaggedData(FIELD_PROCESS_RECORD_HAS_CLIENT_ACTIVITIES,
+                    callerApp.hasClientActivities ? 1 : 0);
+            builder.addTaggedData(FIELD_PROCESS_RECORD_HAS_FOREGROUND_SERVICES,
+                    callerApp.hasForegroundServices() ? 1 : 0);
+            builder.addTaggedData(FIELD_PROCESS_RECORD_HAS_FOREGROUND_ACTIVITIES,
+                    callerApp.foregroundActivities ? 1 : 0);
+            builder.addTaggedData(FIELD_PROCESS_RECORD_HAS_TOP_UI, callerApp.hasTopUi ? 1 : 0);
+            builder.addTaggedData(FIELD_PROCESS_RECORD_HAS_OVERLAY_UI,
+                    callerApp.hasOverlayUi ? 1 : 0);
+            builder.addTaggedData(FIELD_PROCESS_RECORD_PENDING_UI_CLEAN,
+                    callerApp.pendingUiClean ? 1 : 0);
+            if (callerApp.interactionEventTime != 0) {
+                builder.addTaggedData(FIELD_PROCESS_RECORD_MILLIS_SINCE_LAST_INTERACTION_EVENT,
+                        (nowElapsed - callerApp.interactionEventTime));
+            }
+            if (callerApp.fgInteractionTime != 0) {
+                builder.addTaggedData(FIELD_PROCESS_RECORD_MILLIS_SINCE_FG_INTERACTION,
+                        (nowElapsed - callerApp.fgInteractionTime));
+            }
+            if (callerApp.whenUnimportant != 0) {
+                builder.addTaggedData(FIELD_PROCESS_RECORD_MILLIS_SINCE_UNIMPORTANT,
+                        (nowUptime - callerApp.whenUnimportant));
+            }
+        }
+        builder.addTaggedData(FIELD_ACTIVITY_RECORD_LAUNCH_MODE, r.info.launchMode);
+        builder.addTaggedData(FIELD_ACTIVITY_RECORD_TARGET_ACTIVITY, r.info.targetActivity);
+        builder.addTaggedData(FIELD_ACTIVITY_RECORD_FLAGS, r.info.flags);
+        builder.addTaggedData(FIELD_ACTIVITY_RECORD_REAL_ACTIVITY, r.realActivity.toShortString());
+        builder.addTaggedData(FIELD_ACTIVITY_RECORD_SHORT_COMPONENT_NAME, r.shortComponentName);
+        builder.addTaggedData(FIELD_ACTIVITY_RECORD_PROCESS_NAME, r.processName);
+        builder.addTaggedData(FIELD_ACTIVITY_RECORD_IS_FULLSCREEN, r.fullscreen ? 1 : 0);
+        builder.addTaggedData(FIELD_ACTIVITY_RECORD_IS_NO_DISPLAY, r.noDisplay ? 1 : 0);
+        if (r.lastVisibleTime != 0) {
+            builder.addTaggedData(FIELD_ACTIVITY_RECORD_MILLIS_SINCE_LAST_VISIBLE,
+                    (nowUptime - r.lastVisibleTime));
+        }
+        if (r.resultTo != null) {
+            builder.addTaggedData(FIELD_ACTIVITY_RECORD_RESULT_TO_PKG_NAME, r.resultTo.packageName);
+            builder.addTaggedData(FIELD_ACTIVITY_RECORD_RESULT_TO_SHORT_COMPONENT_NAME,
+                    r.resultTo.shortComponentName);
+        }
+        builder.addTaggedData(FIELD_ACTIVITY_RECORD_IS_VISIBLE, r.visible ? 1 : 0);
+        builder.addTaggedData(FIELD_ACTIVITY_RECORD_IS_VISIBLE_IGNORING_KEYGUARD,
+                r.visibleIgnoringKeyguard ? 1 : 0);
+        if (r.lastLaunchTime != 0) {
+            builder.addTaggedData(FIELD_ACTIVITY_RECORD_MILLIS_SINCE_LAST_LAUNCH,
+                    (nowUptime - r.lastLaunchTime));
+        }
+        mMetricsLogger.write(builder);
+    }
+
     private int getTransitionType(WindowingModeTransitionInfo info) {
         if (info.currentTransitionProcessRunning) {
             if (info.startResult == START_SUCCESS) {
diff --git a/services/core/java/com/android/server/am/ActivityStackSupervisor.java b/services/core/java/com/android/server/am/ActivityStackSupervisor.java
index 27a4460..9809bfa 100644
--- a/services/core/java/com/android/server/am/ActivityStackSupervisor.java
+++ b/services/core/java/com/android/server/am/ActivityStackSupervisor.java
@@ -4863,7 +4863,7 @@
             return mService.getActivityStartController().startActivityInPackage(
                     task.mCallingUid, callingPid, callingUid, callingPackage, intent, null, null,
                     null, 0, 0, options, userId, task, "startActivityFromRecents",
-                    false /* validateIncomingUser */);
+                    false /* validateIncomingUser */, null /* originatingPendingIntent */);
         } finally {
             if (windowingMode == WINDOWING_MODE_SPLIT_SCREEN_PRIMARY && task != null) {
                 // If we are launching the task in the docked stack, put it into resizing mode so
diff --git a/services/core/java/com/android/server/am/ActivityStartController.java b/services/core/java/com/android/server/am/ActivityStartController.java
index 2cba720..6e3a79c 100644
--- a/services/core/java/com/android/server/am/ActivityStartController.java
+++ b/services/core/java/com/android/server/am/ActivityStartController.java
@@ -249,7 +249,8 @@
     final int startActivityInPackage(int uid, int realCallingPid, int realCallingUid,
             String callingPackage, Intent intent, String resolvedType, IBinder resultTo,
             String resultWho, int requestCode, int startFlags, SafeActivityOptions options,
-            int userId, TaskRecord inTask, String reason, boolean validateIncomingUser) {
+            int userId, TaskRecord inTask, String reason, boolean validateIncomingUser,
+            PendingIntentRecord originatingPendingIntent) {
 
         userId = checkTargetUser(userId, validateIncomingUser, realCallingPid, realCallingUid,
                 reason);
@@ -268,6 +269,7 @@
                 .setActivityOptions(options)
                 .setMayWait(userId)
                 .setInTask(inTask)
+                .setOriginatingPendingIntent(originatingPendingIntent)
                 .execute();
     }
 
@@ -279,10 +281,12 @@
      * @param intents Intents to start.
      * @param userId Start the intents on this user.
      * @param validateIncomingUser Set true to skip checking {@code userId} with the calling UID.
+     * @param originatingPendingIntent PendingIntentRecord that originated this activity start or
+     *        null if not originated by PendingIntent
      */
     final int startActivitiesInPackage(int uid, String callingPackage, Intent[] intents,
             String[] resolvedTypes, IBinder resultTo, SafeActivityOptions options, int userId,
-            boolean validateIncomingUser) {
+            boolean validateIncomingUser, PendingIntentRecord originatingPendingIntent) {
 
         final String reason = "startActivityInPackage";
 
@@ -291,12 +295,12 @@
 
         // TODO: Switch to user app stacks here.
         return startActivities(null, uid, callingPackage, intents, resolvedTypes, resultTo, options,
-                userId, reason);
+                userId, reason, originatingPendingIntent);
     }
 
     int startActivities(IApplicationThread caller, int callingUid, String callingPackage,
             Intent[] intents, String[] resolvedTypes, IBinder resultTo, SafeActivityOptions options,
-            int userId, String reason) {
+            int userId, String reason, PendingIntentRecord originatingPendingIntent) {
         if (intents == null) {
             throw new NullPointerException("intents is null");
         }
@@ -375,6 +379,7 @@
                             // Top activity decides on animation being run, so we allow only for the
                             // top one as otherwise an activity below might consume it.
                             .setAllowPendingRemoteAnimationRegistryLookup(top /* allowLookup*/)
+                            .setOriginatingPendingIntent(originatingPendingIntent)
                             .execute();
 
                     if (res < 0) {
diff --git a/services/core/java/com/android/server/am/ActivityStarter.java b/services/core/java/com/android/server/am/ActivityStarter.java
index 05fae83..dcf9344 100644
--- a/services/core/java/com/android/server/am/ActivityStarter.java
+++ b/services/core/java/com/android/server/am/ActivityStarter.java
@@ -99,6 +99,7 @@
 import android.os.IBinder;
 import android.os.RemoteException;
 import android.os.SystemClock;
+import android.os.Trace;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.service.voice.IVoiceInteractionSession;
@@ -313,6 +314,7 @@
         int userId;
         WaitResult waitResult;
         int filterCallingUid;
+        PendingIntentRecord originatingPendingIntent;
 
         /**
          * If set to {@code true}, allows this activity start to look into
@@ -369,6 +371,7 @@
             avoidMoveToFront = false;
             allowPendingRemoteAnimationRegistryLookup = true;
             filterCallingUid = UserHandle.USER_NULL;
+            originatingPendingIntent = null;
         }
 
         /**
@@ -407,6 +410,7 @@
             allowPendingRemoteAnimationRegistryLookup
                     = request.allowPendingRemoteAnimationRegistryLookup;
             filterCallingUid = request.filterCallingUid;
+            originatingPendingIntent = request.originatingPendingIntent;
         }
     }
 
@@ -490,7 +494,8 @@
                         mRequest.profilerInfo, mRequest.waitResult, mRequest.globalConfig,
                         mRequest.activityOptions, mRequest.ignoreTargetSecurity, mRequest.userId,
                         mRequest.inTask, mRequest.reason,
-                        mRequest.allowPendingRemoteAnimationRegistryLookup);
+                        mRequest.allowPendingRemoteAnimationRegistryLookup,
+                        mRequest.originatingPendingIntent);
             } else {
                 return startActivity(mRequest.caller, mRequest.intent, mRequest.ephemeralIntent,
                         mRequest.resolvedType, mRequest.activityInfo, mRequest.resolveInfo,
@@ -500,7 +505,8 @@
                         mRequest.realCallingUid, mRequest.startFlags, mRequest.activityOptions,
                         mRequest.ignoreTargetSecurity, mRequest.componentSpecified,
                         mRequest.outActivity, mRequest.inTask, mRequest.reason,
-                        mRequest.allowPendingRemoteAnimationRegistryLookup);
+                        mRequest.allowPendingRemoteAnimationRegistryLookup,
+                        mRequest.originatingPendingIntent);
             }
         } finally {
             onExecutionComplete();
@@ -532,7 +538,8 @@
             String callingPackage, int realCallingPid, int realCallingUid, int startFlags,
             SafeActivityOptions options, boolean ignoreTargetSecurity, boolean componentSpecified,
             ActivityRecord[] outActivity, TaskRecord inTask, String reason,
-            boolean allowPendingRemoteAnimationRegistryLookup) {
+            boolean allowPendingRemoteAnimationRegistryLookup,
+            PendingIntentRecord originatingPendingIntent) {
 
         if (TextUtils.isEmpty(reason)) {
             throw new IllegalArgumentException("Need to specify a reason.");
@@ -545,7 +552,7 @@
                 aInfo, rInfo, voiceSession, voiceInteractor, resultTo, resultWho, requestCode,
                 callingPid, callingUid, callingPackage, realCallingPid, realCallingUid, startFlags,
                 options, ignoreTargetSecurity, componentSpecified, mLastStartActivityRecord,
-                inTask, allowPendingRemoteAnimationRegistryLookup);
+                inTask, allowPendingRemoteAnimationRegistryLookup, originatingPendingIntent);
 
         if (outActivity != null) {
             // mLastStartActivityRecord[0] is set in the call to startActivity above.
@@ -575,7 +582,8 @@
             String callingPackage, int realCallingPid, int realCallingUid, int startFlags,
             SafeActivityOptions options,
             boolean ignoreTargetSecurity, boolean componentSpecified, ActivityRecord[] outActivity,
-            TaskRecord inTask, boolean allowPendingRemoteAnimationRegistryLookup) {
+            TaskRecord inTask, boolean allowPendingRemoteAnimationRegistryLookup,
+            PendingIntentRecord originatingPendingIntent) {
         int err = ActivityManager.START_SUCCESS;
         // Pull the optional Ephemeral Installer-only bundle out of the options early.
         final Bundle verificationBundle
@@ -857,10 +865,58 @@
         mService.onStartActivitySetDidAppSwitch();
         mController.doPendingActivityLaunches(false);
 
+        maybeLogActivityStart(callingUid, callingPackage, realCallingUid, intent, callerApp, r,
+                originatingPendingIntent);
+
         return startActivity(r, sourceRecord, voiceSession, voiceInteractor, startFlags,
                 true /* doResume */, checkedOptions, inTask, outActivity);
     }
 
+    private void maybeLogActivityStart(int callingUid, String callingPackage, int realCallingUid,
+            Intent intent, ProcessRecord callerApp, ActivityRecord r,
+            PendingIntentRecord originatingPendingIntent) {
+        boolean callerAppHasForegroundActivity = (callerApp != null)
+                ? callerApp.foregroundActivities
+                : false;
+        if (!mService.mAm.isActivityStartsLoggingEnabled() || callerAppHasForegroundActivity
+                || r == null) {
+            // skip logging in this case
+            return;
+        }
+
+        try {
+            Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "logActivityStart");
+            final int callingUidProcState = mService.mAm.getUidStateLocked(callingUid);
+            final boolean callingUidHasAnyVisibleWindow =
+                    mService.mWindowManager.isAnyWindowVisibleForUid(callingUid);
+            final int realCallingUidProcState = (callingUid == realCallingUid)
+                    ? callingUidProcState
+                    : mService.mAm.getUidStateLocked(realCallingUid);
+            final boolean realCallingUidHasAnyVisibleWindow = (callingUid == realCallingUid)
+                    ? callingUidHasAnyVisibleWindow
+                    : mService.mWindowManager.isAnyWindowVisibleForUid(realCallingUid);
+            final String targetPackage = r.packageName;
+            final int targetUid = (r.appInfo != null) ? r.appInfo.uid : -1;
+            final int targetUidProcState = mService.mAm.getUidStateLocked(targetUid);
+            final boolean targetUidHasAnyVisibleWindow = (targetUid != -1)
+                    ? mService.mWindowManager.isAnyWindowVisibleForUid(targetUid)
+                    : false;
+            final String targetWhitelistTag = (targetUid != -1)
+                    ? mService.mAm.getPendingTempWhitelistTagForUidLocked(targetUid)
+                    : null;
+
+            mSupervisor.getActivityMetricsLogger().logActivityStart(intent, callerApp, r,
+                    callingUid, callingPackage, callingUidProcState,
+                    callingUidHasAnyVisibleWindow,
+                    realCallingUid, realCallingUidProcState,
+                    realCallingUidHasAnyVisibleWindow,
+                    targetUid, targetPackage, targetUidProcState,
+                    targetUidHasAnyVisibleWindow, targetWhitelistTag,
+                    (originatingPendingIntent != null));
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
+        }
+    }
 
     /**
      * Creates a launch intent for the given auxiliary resolution data.
@@ -941,7 +997,8 @@
             ProfilerInfo profilerInfo, WaitResult outResult,
             Configuration globalConfig, SafeActivityOptions options, boolean ignoreTargetSecurity,
             int userId, TaskRecord inTask, String reason,
-            boolean allowPendingRemoteAnimationRegistryLookup) {
+            boolean allowPendingRemoteAnimationRegistryLookup,
+            PendingIntentRecord originatingPendingIntent) {
         // Refuse possible leaked file descriptors
         if (intent != null && intent.hasFileDescriptors()) {
             throw new IllegalArgumentException("File descriptors passed in Intent");
@@ -1087,7 +1144,7 @@
                     voiceSession, voiceInteractor, resultTo, resultWho, requestCode, callingPid,
                     callingUid, callingPackage, realCallingPid, realCallingUid, startFlags, options,
                     ignoreTargetSecurity, componentSpecified, outRecord, inTask, reason,
-                    allowPendingRemoteAnimationRegistryLookup);
+                    allowPendingRemoteAnimationRegistryLookup, originatingPendingIntent);
 
             Binder.restoreCallingIdentity(origId);
 
@@ -2615,6 +2672,11 @@
         return this;
     }
 
+    ActivityStarter setOriginatingPendingIntent(PendingIntentRecord originatingPendingIntent) {
+        mRequest.originatingPendingIntent = originatingPendingIntent;
+        return this;
+    }
+
     void dump(PrintWriter pw, String prefix) {
         prefix = prefix + "  ";
         pw.print(prefix);
diff --git a/services/core/java/com/android/server/am/ActivityTaskManagerService.java b/services/core/java/com/android/server/am/ActivityTaskManagerService.java
index 68b1d76..11f8bb1 100644
--- a/services/core/java/com/android/server/am/ActivityTaskManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityTaskManagerService.java
@@ -727,7 +727,8 @@
         userId = handleIncomingUser(Binder.getCallingPid(), Binder.getCallingUid(), userId, reason);
         // TODO: Switch to user app stacks here.
         return getActivityStartController().startActivities(caller, -1, callingPackage, intents,
-                resolvedTypes, resultTo, SafeActivityOptions.fromBundle(bOptions), userId, reason);
+                resolvedTypes, resultTo, SafeActivityOptions.fromBundle(bOptions), userId, reason,
+                null /* originatingPendingIntent */);
     }
 
     @Override
@@ -5093,7 +5094,7 @@
                         packageUid, packageName,
                         intents, resolvedTypes, null /* resultTo */,
                         SafeActivityOptions.fromBundle(bOptions), userId,
-                        false /* validateIncomingUser */);
+                        false /* validateIncomingUser */, null /* originatingPendingIntent */);
             }
         }
 
diff --git a/services/core/java/com/android/server/am/AppErrors.java b/services/core/java/com/android/server/am/AppErrors.java
index 3b98f37..162f344 100644
--- a/services/core/java/com/android/server/am/AppErrors.java
+++ b/services/core/java/com/android/server/am/AppErrors.java
@@ -491,7 +491,8 @@
                                     task.intent, null, null, null, 0, 0,
                                     new SafeActivityOptions(ActivityOptions.makeBasic()),
                                     task.userId, null,
-                                    "AppErrors", false /*validateIncomingUser*/);
+                                    "AppErrors", false /*validateIncomingUser*/,
+                                    null /* originatingPendingIntent */);
                         }
                     }
                 }
diff --git a/services/core/java/com/android/server/am/PendingIntentRecord.java b/services/core/java/com/android/server/am/PendingIntentRecord.java
index db09165..ee1166e 100644
--- a/services/core/java/com/android/server/am/PendingIntentRecord.java
+++ b/services/core/java/com/android/server/am/PendingIntentRecord.java
@@ -307,7 +307,7 @@
                             } else if (finalIntent.getComponent() != null) {
                                 finalIntent.getComponent().appendShortString(tag);
                             } else if (finalIntent.getData() != null) {
-                                tag.append(finalIntent.getData());
+                                tag.append(finalIntent.getData().toSafeString());
                             }
                             owner.tempWhitelistForPendingIntentLocked(callingPid,
                                     callingUid, uid, duration, tag.toString());
@@ -346,13 +346,15 @@
                                 res = owner.mActivityTaskManager.getActivityStartController().startActivitiesInPackage(
                                         uid, key.packageName, allIntents, allResolvedTypes,
                                         resultTo, mergedOptions, userId,
-                                        false /* validateIncomingUser */);
+                                        false /* validateIncomingUser */,
+                                        this /* originatingPendingIntent */);
                             } else {
                                 res = owner.mActivityTaskManager.getActivityStartController().startActivityInPackage(uid,
                                         callingPid, callingUid, key.packageName, finalIntent,
                                         resolvedType, resultTo, resultWho, requestCode, 0,
                                         mergedOptions, userId, null, "PendingIntentRecord",
-                                        false /* validateIncomingUser */);
+                                        false /* validateIncomingUser */,
+                                        this /* originatingPendingIntent */);
                             }
                         } catch (RuntimeException e) {
                             Slog.w(TAG, "Unable to send startActivity intent", e);
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index 0015693..3acecba 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -6204,6 +6204,17 @@
     }
 
     /**
+     * Returns true if the callingUid has any window currently visible to the user.
+     */
+    public boolean isAnyWindowVisibleForUid(int callingUid) {
+        synchronized (mWindowMap) {
+            return mRoot.forAllWindows(w -> {
+                return w.getOwningUid() == callingUid && w.isVisible();
+            }, true /* traverseTopToBottom */);
+        }
+    }
+
+    /**
      * Called when a task has been removed from the recent tasks list.
      * <p>
      * Note: This doesn't go through {@link TaskWindowContainerController} yet as the window
diff --git a/services/tests/servicestests/src/com/android/server/am/ActivityStarterTests.java b/services/tests/servicestests/src/com/android/server/am/ActivityStarterTests.java
index 409a2a8..90607ad 100644
--- a/services/tests/servicestests/src/com/android/server/am/ActivityStarterTests.java
+++ b/services/tests/servicestests/src/com/android/server/am/ActivityStarterTests.java
@@ -54,6 +54,7 @@
 import org.junit.runner.RunWith;
 import org.junit.Test;
 
+import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
 import static android.content.Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED;
 import static com.android.server.am.ActivityManagerService.ANIMATE;
 import static com.android.server.am.ActivityStack.REMOVE_TASK_MODE_DESTROYING;
@@ -64,11 +65,13 @@
 import static org.mockito.Mockito.anyBoolean;
 import static org.mockito.Mockito.anyInt;
 import static org.mockito.Mockito.anyObject;
+import static org.mockito.Mockito.clearInvocations;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.eq;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.times;
@@ -92,6 +95,7 @@
     private ActivityTaskManagerService mService;
     private ActivityStarter mStarter;
     private ActivityStartController mController;
+    private ActivityMetricsLogger mActivityMetricsLogger;
 
     private static final int PRECONDITION_NO_CALLER_APP = 1;
     private static final int PRECONDITION_NO_INTENT_COMPONENT = 1 << 1;
@@ -105,11 +109,17 @@
     private static final int PRECONDITION_CANNOT_START_ANY_ACTIVITY = 1 << 9;
     private static final int PRECONDITION_DISALLOW_APP_SWITCHING = 1 << 10;
 
+    private static final int FAKE_CALLING_UID = 666;
+    private static final int FAKE_REAL_CALLING_UID = 667;
+    private static final String FAKE_CALLING_PACKAGE = "com.whatever.dude";
+
     @Override
     public void setUp() throws Exception {
         super.setUp();
         mService = createActivityTaskManagerService();
         mController = mock(ActivityStartController.class);
+        mActivityMetricsLogger = mock(ActivityMetricsLogger.class);
+        clearInvocations(mActivityMetricsLogger);
         mStarter = new ActivityStarter(mController, mService, mService.mStackSupervisor,
                 mock(ActivityStartInterceptor.class));
     }
@@ -480,4 +490,46 @@
             assertTrue(stack.getAllTasks().isEmpty());
         }
     }
+
+    /**
+     * This test ensures that activity starts are not being logged when the logging is disabled.
+     */
+    @Test
+    public void testActivityStartsLogging_noLoggingWhenDisabled() {
+        doReturn(false).when(mService.mAm).isActivityStartsLoggingEnabled();
+        doReturn(mActivityMetricsLogger).when(mService.mStackSupervisor).getActivityMetricsLogger();
+
+        ActivityStarter starter = prepareStarter(FLAG_ACTIVITY_NEW_TASK);
+        starter.setReason("testActivityStartsLogging_noLoggingWhenDisabled").execute();
+
+        // verify logging wasn't done
+        verify(mActivityMetricsLogger, never()).logActivityStart(any(), any(), any(), anyInt(),
+                any(), anyInt(), anyBoolean(), anyInt(), anyInt(), anyBoolean(), anyInt(), any(),
+                anyInt(), anyBoolean(), any(), anyBoolean());
+    }
+
+    /**
+     * This test ensures that activity starts are being logged when the logging is enabled.
+     */
+    @Test
+    public void testActivityStartsLogging_logsWhenEnabled() {
+        // note: conveniently this package doesn't have any activity visible
+        doReturn(true).when(mService.mAm).isActivityStartsLoggingEnabled();
+        doReturn(mActivityMetricsLogger).when(mService.mStackSupervisor).getActivityMetricsLogger();
+
+        ActivityStarter starter = prepareStarter(FLAG_ACTIVITY_NEW_TASK)
+                .setCallingUid(FAKE_CALLING_UID)
+                .setRealCallingUid(FAKE_REAL_CALLING_UID)
+                .setCallingPackage(FAKE_CALLING_PACKAGE)
+                .setOriginatingPendingIntent(null);
+
+        starter.setReason("testActivityStartsLogging_logsWhenEnabled").execute();
+
+        // verify the above activity start was logged
+        verify(mActivityMetricsLogger, times(1)).logActivityStart(any(), any(), any(),
+                eq(FAKE_CALLING_UID), eq(FAKE_CALLING_PACKAGE), anyInt(), anyBoolean(),
+                eq(FAKE_REAL_CALLING_UID), anyInt(), anyBoolean(), anyInt(),
+                eq(ActivityBuilder.getDefaultComponent().getPackageName()), anyInt(), anyBoolean(),
+                any(), eq(false));
+    }
 }