Merge "[view compiler] Add XML to DEX compilation"
diff --git a/config/hiddenapi-greylist.txt b/config/hiddenapi-greylist.txt
index caac8ae..0c561e6 100644
--- a/config/hiddenapi-greylist.txt
+++ b/config/hiddenapi-greylist.txt
@@ -2878,7 +2878,6 @@
 Lcom/android/internal/telephony/dataconnection/DataConnection;->mPhone:Lcom/android/internal/telephony/Phone;
 Lcom/android/internal/telephony/dataconnection/DataConnection;->mRilRat:I
 Lcom/android/internal/telephony/dataconnection/DataConnection;->notifyAllOfConnected(Ljava/lang/String;)V
-Lcom/android/internal/telephony/dataconnection/DataConnection;->notifyAllOfDisconnectDcRetrying(Ljava/lang/String;)V
 Lcom/android/internal/telephony/dataconnection/DataConnection;->notifyDisconnectCompleted(Lcom/android/internal/telephony/dataconnection/DataConnection$DisconnectParams;Z)V
 Lcom/android/internal/telephony/dataconnection/DataConnection;->onConnect(Lcom/android/internal/telephony/dataconnection/DataConnection$ConnectionParams;)V
 Lcom/android/internal/telephony/dataconnection/DataConnection;->tearDownData(Ljava/lang/Object;)V
@@ -2916,8 +2915,6 @@
 Lcom/android/internal/telephony/dataconnection/DcTracker;->mResolver:Landroid/content/ContentResolver;
 Lcom/android/internal/telephony/dataconnection/DcTracker;->mState:Lcom/android/internal/telephony/DctConstants$State;
 Lcom/android/internal/telephony/dataconnection/DcTracker;->mSubscriptionManager:Landroid/telephony/SubscriptionManager;
-Lcom/android/internal/telephony/dataconnection/DcTracker;->notifyDataConnection(Ljava/lang/String;)V
-Lcom/android/internal/telephony/dataconnection/DcTracker;->notifyOffApnsOfAvailability(Ljava/lang/String;)V
 Lcom/android/internal/telephony/dataconnection/DcTracker;->onActionIntentDataStallAlarm(Landroid/content/Intent;)V
 Lcom/android/internal/telephony/dataconnection/DcTracker;->onActionIntentProvisioningApnAlarm(Landroid/content/Intent;)V
 Lcom/android/internal/telephony/dataconnection/DcTracker;->onRecordsLoadedOrSubIdChanged()V
@@ -2946,7 +2943,6 @@
 Lcom/android/internal/telephony/DctConstants$State;->FAILED:Lcom/android/internal/telephony/DctConstants$State;
 Lcom/android/internal/telephony/DctConstants$State;->IDLE:Lcom/android/internal/telephony/DctConstants$State;
 Lcom/android/internal/telephony/DctConstants$State;->RETRYING:Lcom/android/internal/telephony/DctConstants$State;
-Lcom/android/internal/telephony/DctConstants$State;->SCANNING:Lcom/android/internal/telephony/DctConstants$State;
 Lcom/android/internal/telephony/DctConstants$State;->values()[Lcom/android/internal/telephony/DctConstants$State;
 Lcom/android/internal/telephony/DefaultPhoneNotifier;->mRegistry:Lcom/android/internal/telephony/ITelephonyRegistry;
 Lcom/android/internal/telephony/DriverCall$State;->ACTIVE:Lcom/android/internal/telephony/DriverCall$State;
@@ -3370,7 +3366,7 @@
 Lcom/android/internal/telephony/ITelephonyRegistry;->listen(Ljava/lang/String;Lcom/android/internal/telephony/IPhoneStateListener;IZ)V
 Lcom/android/internal/telephony/ITelephonyRegistry;->notifyCallState(ILjava/lang/String;)V
 Lcom/android/internal/telephony/ITelephonyRegistry;->notifyCellInfo(Ljava/util/List;)V
-Lcom/android/internal/telephony/ITelephonyRegistry;->notifyDataConnectionFailed(Ljava/lang/String;Ljava/lang/String;)V
+Lcom/android/internal/telephony/ITelephonyRegistry;->notifyDataConnectionFailed(Ljava/lang/String;)V
 Lcom/android/internal/telephony/IWapPushManager$Stub;->asInterface(Landroid/os/IBinder;)Lcom/android/internal/telephony/IWapPushManager;
 Lcom/android/internal/telephony/IWapPushManager;->addPackage(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;IZZ)Z
 Lcom/android/internal/telephony/IWapPushManager;->deletePackage(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)Z
diff --git a/core/java/android/view/AccessibilityIterators.java b/core/java/android/view/AccessibilityIterators.java
index 9f7560c..54cfc00 100644
--- a/core/java/android/view/AccessibilityIterators.java
+++ b/core/java/android/view/AccessibilityIterators.java
@@ -147,6 +147,9 @@
         @Override
         public void onConfigurationChanged(Configuration globalConfig) {
             final Locale locale = globalConfig.getLocales().get(0);
+            if (locale == null) {
+                return;
+            }
             if (!mLocale.equals(locale)) {
                 mLocale = locale;
                 onLocaleChanged(locale);
diff --git a/services/core/java/com/android/server/TelephonyRegistry.java b/services/core/java/com/android/server/TelephonyRegistry.java
index 190e99f..6d10632 100644
--- a/services/core/java/com/android/server/TelephonyRegistry.java
+++ b/services/core/java/com/android/server/TelephonyRegistry.java
@@ -1313,16 +1313,17 @@
         }
     }
 
-    public void notifyDataConnection(int state, boolean isDataAllowed,
-            String reason, String apn, String apnType, LinkProperties linkProperties,
-            NetworkCapabilities networkCapabilities, int networkType, boolean roaming) {
+    public void notifyDataConnection(int state, boolean isDataAllowed, String apn, String apnType,
+                                     LinkProperties linkProperties,
+                                     NetworkCapabilities networkCapabilities, int networkType,
+                                     boolean roaming) {
         notifyDataConnectionForSubscriber(SubscriptionManager.DEFAULT_SUBSCRIPTION_ID, state,
-            isDataAllowed,reason, apn, apnType, linkProperties,
-            networkCapabilities, networkType, roaming);
+                isDataAllowed, apn, apnType, linkProperties,
+                networkCapabilities, networkType, roaming);
     }
 
-    public void notifyDataConnectionForSubscriber(int subId, int state,
-            boolean isDataAllowed, String reason, String apn, String apnType,
+    public void notifyDataConnectionForSubscriber(int subId, int state, boolean isDataAllowed,
+                                                  String apn, String apnType,
             LinkProperties linkProperties, NetworkCapabilities networkCapabilities,
             int networkType, boolean roaming) {
         if (!checkNotifyPermission("notifyDataConnection()" )) {
@@ -1331,7 +1332,6 @@
         if (VDBG) {
             log("notifyDataConnectionForSubscriber: subId=" + subId
                 + " state=" + state + " isDataAllowed=" + isDataAllowed
-                + " reason='" + reason
                 + "' apn='" + apn + "' apnType=" + apnType + " networkType=" + networkType
                 + " mRecords.size()=" + mRecords.size());
         }
@@ -1366,7 +1366,7 @@
                     mDataConnectionNetworkType[phoneId] = networkType;
                 }
                 mPreciseDataConnectionState = new PreciseDataConnectionState(state, networkType,
-                        apnType, apn, reason, linkProperties, "");
+                        apnType, apn, linkProperties, "");
                 for (Record r : mRecords) {
                     if (r.matchPhoneStateListenerEvent(
                             PhoneStateListener.LISTEN_PRECISE_DATA_CONNECTION_STATE)) {
@@ -1381,30 +1381,29 @@
             }
             handleRemoveListLocked();
         }
-        broadcastDataConnectionStateChanged(state, isDataAllowed, reason, apn,
-                apnType, linkProperties, networkCapabilities, roaming, subId);
-        broadcastPreciseDataConnectionStateChanged(state, networkType, apnType, apn, reason,
+        broadcastDataConnectionStateChanged(state, isDataAllowed, apn, apnType, linkProperties,
+                networkCapabilities, roaming, subId);
+        broadcastPreciseDataConnectionStateChanged(state, networkType, apnType, apn,
                 linkProperties, "");
     }
 
-    public void notifyDataConnectionFailed(String reason, String apnType) {
+    public void notifyDataConnectionFailed(String apnType) {
          notifyDataConnectionFailedForSubscriber(SubscriptionManager.DEFAULT_SUBSCRIPTION_ID,
-                 reason, apnType);
+                 apnType);
     }
 
-    public void notifyDataConnectionFailedForSubscriber(int subId,
-            String reason, String apnType) {
+    public void notifyDataConnectionFailedForSubscriber(int subId, String apnType) {
         if (!checkNotifyPermission("notifyDataConnectionFailed()")) {
             return;
         }
         if (VDBG) {
             log("notifyDataConnectionFailedForSubscriber: subId=" + subId
-                + " reason=" + reason + " apnType=" + apnType);
+                    + " apnType=" + apnType);
         }
         synchronized (mRecords) {
             mPreciseDataConnectionState = new PreciseDataConnectionState(
                     TelephonyManager.DATA_UNKNOWN,TelephonyManager.NETWORK_TYPE_UNKNOWN,
-                    apnType, "", reason, null, "");
+                    apnType, "", null, "");
             for (Record r : mRecords) {
                 if (r.matchPhoneStateListenerEvent(
                         PhoneStateListener.LISTEN_PRECISE_DATA_CONNECTION_STATE)) {
@@ -1417,9 +1416,9 @@
             }
             handleRemoveListLocked();
         }
-        broadcastDataConnectionFailed(reason, apnType, subId);
+        broadcastDataConnectionFailed(apnType, subId);
         broadcastPreciseDataConnectionStateChanged(TelephonyManager.DATA_UNKNOWN,
-                TelephonyManager.NETWORK_TYPE_UNKNOWN, apnType, "", reason, null, "");
+                TelephonyManager.NETWORK_TYPE_UNKNOWN, apnType, "", null, "");
     }
 
     public void notifyCellLocation(Bundle cellLocation) {
@@ -1529,15 +1528,14 @@
         }
     }
 
-    public void notifyPreciseDataConnectionFailed(String reason, String apnType,
-            String apn, String failCause) {
+    public void notifyPreciseDataConnectionFailed(String apnType, String apn, String failCause) {
         if (!checkNotifyPermission("notifyPreciseDataConnectionFailed()")) {
             return;
         }
         synchronized (mRecords) {
             mPreciseDataConnectionState = new PreciseDataConnectionState(
                     TelephonyManager.DATA_UNKNOWN, TelephonyManager.NETWORK_TYPE_UNKNOWN,
-                    apnType, apn, reason, null, failCause);
+                    apnType, apn, null, failCause);
             for (Record r : mRecords) {
                 if (r.matchPhoneStateListenerEvent(
                         PhoneStateListener.LISTEN_PRECISE_DATA_CONNECTION_STATE)) {
@@ -1551,7 +1549,7 @@
             handleRemoveListLocked();
         }
         broadcastPreciseDataConnectionStateChanged(TelephonyManager.DATA_UNKNOWN,
-                TelephonyManager.NETWORK_TYPE_UNKNOWN, apnType, apn, reason, null, failCause);
+                TelephonyManager.NETWORK_TYPE_UNKNOWN, apnType, apn, null, failCause);
     }
 
     @Override
@@ -1882,10 +1880,10 @@
                         android.Manifest.permission.READ_CALL_LOG});
     }
 
-    private void broadcastDataConnectionStateChanged(int state,
-            boolean isDataAllowed,
-            String reason, String apn, String apnType, LinkProperties linkProperties,
-            NetworkCapabilities networkCapabilities, boolean roaming, int subId) {
+    private void broadcastDataConnectionStateChanged(int state, boolean isDataAllowed, String apn,
+                                                     String apnType, LinkProperties linkProperties,
+                                                     NetworkCapabilities networkCapabilities,
+                                                     boolean roaming, int subId) {
         // Note: not reporting to the battery stats service here, because the
         // status bar takes care of that after taking into account all of the
         // required info.
@@ -1895,9 +1893,6 @@
         if (!isDataAllowed) {
             intent.putExtra(PhoneConstants.NETWORK_UNAVAILABLE_KEY, true);
         }
-        if (reason != null) {
-            intent.putExtra(PhoneConstants.STATE_CHANGE_REASON_KEY, reason);
-        }
         if (linkProperties != null) {
             intent.putExtra(PhoneConstants.DATA_LINK_PROPERTIES_KEY, linkProperties);
             String iface = linkProperties.getInterfaceName();
@@ -1916,17 +1911,15 @@
         mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
     }
 
-    private void broadcastDataConnectionFailed(String reason, String apnType,
-            int subId) {
+    private void broadcastDataConnectionFailed(String apnType, int subId) {
         Intent intent = new Intent(TelephonyIntents.ACTION_DATA_CONNECTION_FAILED);
-        intent.putExtra(PhoneConstants.FAILURE_REASON_KEY, reason);
         intent.putExtra(PhoneConstants.DATA_APN_TYPE_KEY, apnType);
         intent.putExtra(PhoneConstants.SUBSCRIPTION_KEY, subId);
         mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
     }
 
     private void broadcastPreciseCallStateChanged(int ringingCallState, int foregroundCallState,
-            int backgroundCallState) {
+                                                  int backgroundCallState) {
         Intent intent = new Intent(TelephonyManager.ACTION_PRECISE_CALL_STATE_CHANGED);
         intent.putExtra(TelephonyManager.EXTRA_RINGING_CALL_STATE, ringingCallState);
         intent.putExtra(TelephonyManager.EXTRA_FOREGROUND_CALL_STATE, foregroundCallState);
@@ -1936,16 +1929,16 @@
     }
 
     private void broadcastPreciseDataConnectionStateChanged(int state, int networkType,
-            String apnType, String apn, String reason, LinkProperties linkProperties,
-            String failCause) {
+                                                            String apnType, String apn,
+                                                            LinkProperties linkProperties,
+                                                            String failCause) {
         Intent intent = new Intent(TelephonyManager.ACTION_PRECISE_DATA_CONNECTION_STATE_CHANGED);
         intent.putExtra(PhoneConstants.STATE_KEY, state);
         intent.putExtra(PhoneConstants.DATA_NETWORK_TYPE_KEY, networkType);
-        if (reason != null) intent.putExtra(PhoneConstants.STATE_CHANGE_REASON_KEY, reason);
         if (apnType != null) intent.putExtra(PhoneConstants.DATA_APN_TYPE_KEY, apnType);
         if (apn != null) intent.putExtra(PhoneConstants.DATA_APN_KEY, apn);
         if (linkProperties != null) {
-            intent.putExtra(PhoneConstants.DATA_LINK_PROPERTIES_KEY,linkProperties);
+            intent.putExtra(PhoneConstants.DATA_LINK_PROPERTIES_KEY, linkProperties);
         }
         if (failCause != null) intent.putExtra(PhoneConstants.DATA_FAILURE_CAUSE_KEY, failCause);
 
diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 4561ea3..89b646f 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -2242,7 +2242,7 @@
      * e.g.) To use RSCP by default, set the value to "rscp". The signal strength level will
      * then be determined by #KEY_WCDMA_RSCP_THRESHOLDS_INT_ARRAY
      * <p>
-     * Currently this only supports the value "rscp"
+     * Currently this supports the value "rscp" and "rssi".
      * @hide
      */
     // FIXME: this key and related keys must not be exposed without a consistent philosophy for
@@ -2690,7 +2690,7 @@
                         -95, /* SIGNAL_STRENGTH_GOOD */
                         -85  /* SIGNAL_STRENGTH_GREAT */
                 });
-        sDefaults.putString(KEY_WCDMA_DEFAULT_SIGNAL_STRENGTH_MEASUREMENT_STRING, "");
+        sDefaults.putString(KEY_WCDMA_DEFAULT_SIGNAL_STRENGTH_MEASUREMENT_STRING, "rssi");
         sDefaults.putBoolean(KEY_CONFIG_SHOW_ORIG_DIAL_STRING_FOR_CDMA_BOOL, false);
         sDefaults.putBoolean(KEY_SHOW_CALL_BLOCKING_DISABLED_NOTIFICATION_ALWAYS_BOOL, false);
         sDefaults.putBoolean(KEY_CALL_FORWARDING_OVER_UT_WARNING_BOOL, false);
diff --git a/telephony/java/android/telephony/CellSignalStrength.java b/telephony/java/android/telephony/CellSignalStrength.java
index a18275f..7d07a73 100644
--- a/telephony/java/android/telephony/CellSignalStrength.java
+++ b/telephony/java/android/telephony/CellSignalStrength.java
@@ -42,6 +42,9 @@
     public static final int NUM_SIGNAL_STRENGTH_BINS = 5;
 
     /** @hide */
+    protected static final int NUM_SIGNAL_STRENGTH_THRESHOLDS = NUM_SIGNAL_STRENGTH_BINS - 1;
+
+    /** @hide */
     public static final String[] SIGNAL_STRENGTH_NAMES = {
         "none", "poor", "moderate", "good", "great"
     };
diff --git a/telephony/java/android/telephony/CellSignalStrengthWcdma.java b/telephony/java/android/telephony/CellSignalStrengthWcdma.java
index 88f6fbc..0760407 100644
--- a/telephony/java/android/telephony/CellSignalStrengthWcdma.java
+++ b/telephony/java/android/telephony/CellSignalStrengthWcdma.java
@@ -21,6 +21,7 @@
 import android.os.Parcelable;
 import android.os.PersistableBundle;
 import android.telephony.Rlog;
+import android.text.TextUtils;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
@@ -41,8 +42,18 @@
     private static final int WCDMA_RSSI_POOR = -107;
     private static final int WCDMA_RSSI_MIN = -113;
 
-    private static final int WCDMA_RSCP_MIN = -120;
+    private static final int[] sRssiThresholds = new int[]{
+            WCDMA_RSSI_POOR, WCDMA_RSSI_MODERATE, WCDMA_RSSI_GOOD, WCDMA_RSSI_GREAT};
+
     private static final int WCDMA_RSCP_MAX = -24;
+    private static final int WCDMA_RSCP_GREAT = -85;
+    private static final int WCDMA_RSCP_GOOD = -95;
+    private static final int WCDMA_RSCP_MODERATE = -105;
+    private static final int WCDMA_RSCP_POOR = -115;
+    private static final int WCDMA_RSCP_MIN = -120;
+
+    private static final int[] sRscpThresholds = new int[] {
+            WCDMA_RSCP_POOR, WCDMA_RSCP_MODERATE, WCDMA_RSCP_GOOD, WCDMA_RSCP_GREAT};
 
     // TODO: Because these are used as values in CarrierConfig, they should be exposed somehow.
     /** @hide */
@@ -54,6 +65,9 @@
     /** @hide */
     public static final String LEVEL_CALCULATION_METHOD_RSCP = "rscp";
 
+    // Default to RSSI for backwards compatibility with older devices
+    private static final String sLevelCalculationMethod = LEVEL_CALCULATION_METHOD_RSSI;
+
     private int mRssi; // in dBm [-113, 51] or CellInfo.UNAVAILABLE if unknown
     private int mBitErrorRate; // bit error rate (0-7, 99) as defined in TS 27.007 8.5 or
                                // CellInfo.UNAVAILABLE if unknown
@@ -121,10 +135,6 @@
         mLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
     }
 
-    private static final String sLevelCalculationMethod = LEVEL_CALCULATION_METHOD_RSSI;
-    private static final int[] sThresholds = new int[]{
-            WCDMA_RSSI_POOR, WCDMA_RSSI_GOOD, WCDMA_RSSI_GOOD, WCDMA_RSSI_GREAT};
-
     /**
      * Retrieve an abstract level value for the overall signal strength.
      *
@@ -140,41 +150,46 @@
     @Override
     public void updateLevel(PersistableBundle cc, ServiceState ss) {
         String calcMethod;
-        int[] thresholds;
+        int[] rscpThresholds;
 
         if (cc == null) {
             calcMethod = sLevelCalculationMethod;
-            thresholds = sThresholds;
+            rscpThresholds = sRscpThresholds;
         } else {
             // TODO: abstract this entire thing into a series of functions
             calcMethod = cc.getString(
                     CarrierConfigManager.KEY_WCDMA_DEFAULT_SIGNAL_STRENGTH_MEASUREMENT_STRING,
                     sLevelCalculationMethod);
-            thresholds = cc.getIntArray(
+            if (TextUtils.isEmpty(calcMethod)) calcMethod = sLevelCalculationMethod;
+            rscpThresholds = cc.getIntArray(
                     CarrierConfigManager.KEY_WCDMA_RSCP_THRESHOLDS_INT_ARRAY);
-            if (thresholds == null) thresholds = sThresholds;
+            if (rscpThresholds == null || rscpThresholds.length != NUM_SIGNAL_STRENGTH_THRESHOLDS) {
+                rscpThresholds = sRscpThresholds;
+            }
         }
 
-        int level = thresholds.length;
+        int level = NUM_SIGNAL_STRENGTH_THRESHOLDS;
         switch (calcMethod) {
             case LEVEL_CALCULATION_METHOD_RSCP:
                 if (mRscp < WCDMA_RSCP_MIN || mRscp > WCDMA_RSCP_MAX) {
                     mLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
                     return;
                 }
-                while (level > 0 && mRscp < thresholds[level - 1]) level--;
+                while (level > 0 && mRscp < rscpThresholds[level - 1]) level--;
                 mLevel = level;
                 return;
+            default:
+                loge("Invalid Level Calculation Method for CellSignalStrengthWcdma = "
+                        + calcMethod);
+                /** fall through */
             case LEVEL_CALCULATION_METHOD_RSSI:
                 if (mRssi < WCDMA_RSSI_MIN || mRssi > WCDMA_RSSI_MAX) {
                     mLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
                     return;
                 }
-                while (level > 0 && mRssi < thresholds[level - 1]) level--;
+                while (level > 0 && mRssi < sRssiThresholds[level - 1]) level--;
                 mLevel = level;
                 return;
-            default:
-                mLevel = SIGNAL_STRENGTH_NONE_OR_UNKNOWN;
         }
     }
 
@@ -204,7 +219,7 @@
     }
 
     /**
-     * Get the signal strength as dBm
+     * Get the RSSI as dBm
      *
      * @hide
      */
@@ -214,12 +229,32 @@
 
     /**
      * Get the RSCP as dBm
+     *
      * @hide
      */
     public int getRscp() {
         return mRscp;
     }
 
+    /**
+     * Get the Ec/No as dB
+     *
+     * @hide
+     */
+    public int getEcNo() {
+        return mEcNo;
+    }
+
+    /**
+     * Return the Bit Error Rate
+     *
+     * @returns the bit error rate (0-7, 99) as defined in TS 27.007 8.5 or UNAVAILABLE.
+     * @hide
+     */
+    public int getBitErrorRate() {
+        return mBitErrorRate;
+    }
+
     @Override
     public int hashCode() {
         return Objects.hash(mRssi, mBitErrorRate, mRscp, mEcNo, mLevel);
@@ -304,9 +339,16 @@
     };
 
     /**
-     * log
+     * log warning
      */
     private static void log(String s) {
         Rlog.w(LOG_TAG, s);
     }
+
+    /**
+     * log error
+     */
+    private static void loge(String s) {
+        Rlog.e(LOG_TAG, s);
+    }
 }
diff --git a/telephony/java/android/telephony/PreciseDataConnectionState.java b/telephony/java/android/telephony/PreciseDataConnectionState.java
index b258f52..8373899 100644
--- a/telephony/java/android/telephony/PreciseDataConnectionState.java
+++ b/telephony/java/android/telephony/PreciseDataConnectionState.java
@@ -17,10 +17,11 @@
 package android.telephony;
 
 import android.annotation.UnsupportedAppUsage;
+import android.net.LinkProperties;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.telephony.TelephonyManager;
-import android.net.LinkProperties;
+
+import java.util.Objects;
 
 /**
  * Contains precise data connection state.
@@ -32,7 +33,6 @@
  *   <li>Network type of the connection.
  *   <li>APN type.
  *   <li>APN.
- *   <li>Data connection change reason.
  *   <li>The properties of the network link.
  *   <li>Data connection fail cause.
  * </ul>
@@ -45,7 +45,6 @@
     private int mNetworkType = TelephonyManager.NETWORK_TYPE_UNKNOWN;
     private String mAPNType = "";
     private String mAPN = "";
-    private String mReason = "";
     private LinkProperties mLinkProperties = null;
     private String mFailCause = "";
 
@@ -55,14 +54,12 @@
      * @hide
      */
     @UnsupportedAppUsage
-    public PreciseDataConnectionState(int state, int networkType,
-            String apnType, String apn, String reason,
-            LinkProperties linkProperties, String failCause) {
+    public PreciseDataConnectionState(int state, int networkType, String apnType, String apn,
+                                      LinkProperties linkProperties, String failCause) {
         mState = state;
         mNetworkType = networkType;
         mAPNType = apnType;
         mAPN = apn;
-        mReason = reason;
         mLinkProperties = linkProperties;
         mFailCause = failCause;
     }
@@ -83,7 +80,6 @@
         mNetworkType = in.readInt();
         mAPNType = in.readString();
         mAPN = in.readString();
-        mReason = in.readString();
         mLinkProperties = (LinkProperties)in.readParcelable(null);
         mFailCause = in.readString();
     }
@@ -144,14 +140,6 @@
     }
 
     /**
-     * Get data connection change reason.
-     */
-    @UnsupportedAppUsage
-    public String getDataConnectionChangeReason() {
-        return mReason;
-    }
-
-    /**
      * Get the properties of the network link.
      */
     @UnsupportedAppUsage
@@ -178,7 +166,6 @@
         out.writeInt(mNetworkType);
         out.writeString(mAPNType);
         out.writeString(mAPN);
-        out.writeString(mReason);
         out.writeParcelable(mLinkProperties, flags);
         out.writeString(mFailCause);
     }
@@ -197,16 +184,7 @@
 
     @Override
     public int hashCode() {
-        final int prime = 31;
-        int result = 1;
-        result = prime * result + mState;
-        result = prime * result + mNetworkType;
-        result = prime * result + ((mAPNType == null) ? 0 : mAPNType.hashCode());
-        result = prime * result + ((mAPN == null) ? 0 : mAPN.hashCode());
-        result = prime * result + ((mReason == null) ? 0 : mReason.hashCode());
-        result = prime * result + ((mLinkProperties == null) ? 0 : mLinkProperties.hashCode());
-        result = prime * result + ((mFailCause == null) ? 0 : mFailCause.hashCode());
-        return result;
+        return Objects.hash(mState, mNetworkType, mAPNType, mAPN, mLinkProperties, mFailCause);
     }
 
     @Override
@@ -252,13 +230,6 @@
         if (mNetworkType != other.mNetworkType) {
             return false;
         }
-        if (mReason == null) {
-            if (other.mReason != null) {
-                return false;
-            }
-        } else if (!mReason.equals(other.mReason)) {
-            return false;
-        }
         if (mState != other.mState) {
             return false;
         }
@@ -273,7 +244,6 @@
         sb.append(", Network type: " + mNetworkType);
         sb.append(", APN type: " + mAPNType);
         sb.append(", APN: " + mAPN);
-        sb.append(", Change reason: " + mReason);
         sb.append(", Link properties: " + mLinkProperties);
         sb.append(", Fail cause: " + mFailCause);
 
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 2286ce2..739c80f 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -772,7 +772,6 @@
      * The {@link #EXTRA_DATA_NETWORK_TYPE} extra indicates the connection network type.
      * The {@link #EXTRA_DATA_APN_TYPE} extra indicates the APN type.
      * The {@link #EXTRA_DATA_APN} extra indicates the APN.
-     * The {@link #EXTRA_DATA_CHANGE_REASON} extra indicates the connection change reason.
      * The {@link #EXTRA_DATA_IFACE_PROPERTIES} extra indicates the connection interface.
      * The {@link #EXTRA_DATA_FAILURE_CAUSE} extra indicates the connection fail cause.
      *
@@ -783,7 +782,6 @@
      * @see #EXTRA_DATA_NETWORK_TYPE
      * @see #EXTRA_DATA_APN_TYPE
      * @see #EXTRA_DATA_APN
-     * @see #EXTRA_DATA_CHANGE_REASON
      * @see #EXTRA_DATA_IFACE
      * @see #EXTRA_DATA_FAILURE_CAUSE
      * @hide
@@ -872,18 +870,6 @@
 
     /**
      * The lookup key used with the {@link #ACTION_PRECISE_DATA_CONNECTION_STATE_CHANGED} broadcast
-     * for an String representation of the change reason.
-     *
-     * <p class="note">
-     * Retrieve with
-     * {@link android.content.Intent#getStringExtra(String name)}.
-     *
-     * @hide
-     */
-    public static final String EXTRA_DATA_CHANGE_REASON = PhoneConstants.STATE_CHANGE_REASON_KEY;
-
-    /**
-     * The lookup key used with the {@link #ACTION_PRECISE_DATA_CONNECTION_STATE_CHANGED} broadcast
      * for an String representation of the data interface.
      *
      * <p class="note">
diff --git a/telephony/java/android/telephony/ims/Rcs1To1Thread.java b/telephony/java/android/telephony/ims/Rcs1To1Thread.java
index 5122c7d..709b3aa 100644
--- a/telephony/java/android/telephony/ims/Rcs1To1Thread.java
+++ b/telephony/java/android/telephony/ims/Rcs1To1Thread.java
@@ -23,6 +23,10 @@
  * @hide - TODO(sahinc) make this public
  */
 public class Rcs1To1Thread extends RcsThread {
+    public Rcs1To1Thread(int threadId) {
+        super(threadId);
+    }
+
     public static final Creator<Rcs1To1Thread> CREATOR = new Creator<Rcs1To1Thread>() {
         @Override
         public Rcs1To1Thread createFromParcel(Parcel in) {
@@ -36,6 +40,7 @@
     };
 
     protected Rcs1To1Thread(Parcel in) {
+        super(in);
     }
 
     @Override
@@ -45,5 +50,7 @@
 
     @Override
     public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(RCS_1_TO_1_TYPE);
+        super.writeToParcel(dest, flags);
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsGroupThread.java b/telephony/java/android/telephony/ims/RcsGroupThread.java
index 150c4d4..d954b2d 100644
--- a/telephony/java/android/telephony/ims/RcsGroupThread.java
+++ b/telephony/java/android/telephony/ims/RcsGroupThread.java
@@ -36,6 +36,7 @@
     };
 
     protected RcsGroupThread(Parcel in) {
+        super(in);
     }
 
     @Override
@@ -45,5 +46,7 @@
 
     @Override
     public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(RCS_GROUP_TYPE);
+        super.writeToParcel(dest, flags);
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsMessageStore.java b/telephony/java/android/telephony/ims/RcsMessageStore.java
index 4198c78..1bf6ffd 100644
--- a/telephony/java/android/telephony/ims/RcsMessageStore.java
+++ b/telephony/java/android/telephony/ims/RcsMessageStore.java
@@ -16,6 +16,8 @@
 
 package android.telephony.ims;
 
+import android.annotation.Nullable;
+import android.annotation.WorkerThread;
 import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.telephony.Rlog;
@@ -27,26 +29,93 @@
  * @hide - TODO make this public
  */
 public class RcsMessageStore {
-    private static final String TAG = "RcsMessageStore";
-    private static final boolean VDBG = false;
+    static final String TAG = "RcsMessageStore";
 
     /**
-     * Delete the RcsThread identified by the given threadId.
+     * Returns the first chunk of existing {@link RcsThread}s in the common storage.
+     * @param queryParameters Parameters to specify to return a subset of all RcsThreads.
+     *                        Passing a value of null will return all threads.
+     */
+    @WorkerThread
+    public RcsThreadQueryResult getRcsThreads(@Nullable RcsThreadQueryParameters queryParameters) {
+        try {
+            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
+            if (iRcs != null) {
+                return iRcs.getRcsThreads(queryParameters);
+            }
+        } catch (RemoteException re) {
+            Rlog.e(TAG, "RcsMessageStore: Exception happened during getRcsThreads", re);
+        }
+
+        return null;
+    }
+
+    /**
+     * Returns the next chunk of {@link RcsThread}s in the common storage.
+     * @param continuationToken A token to continue the query to get the next chunk. This is
+     *                          obtained through {@link RcsThreadQueryResult#nextChunkToken}.
+     */
+    @WorkerThread
+    public RcsThreadQueryResult getRcsThreads(RcsThreadQueryContinuationToken continuationToken) {
+        try {
+            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
+            if (iRcs != null) {
+                return iRcs.getRcsThreadsWithToken(continuationToken);
+            }
+        } catch (RemoteException re) {
+            Rlog.e(TAG, "RcsMessageStore: Exception happened during getRcsThreads", re);
+        }
+
+        return null;
+    }
+
+    /**
+     * Creates a new 1 to 1 thread with the given participant and persists it in the storage.
+     */
+    @WorkerThread
+    public Rcs1To1Thread createRcs1To1Thread(RcsParticipant recipient) {
+        try {
+            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
+            if (iRcs != null) {
+                return iRcs.createRcs1To1Thread(recipient);
+            }
+        } catch (RemoteException re) {
+            Rlog.e(TAG, "RcsMessageStore: Exception happened during createRcs1To1Thread", re);
+        }
+
+        return null;
+    }
+
+    /**
+     * Delete the {@link RcsThread} identified by the given threadId.
      * @param threadId threadId of the thread to be deleted.
      */
+    @WorkerThread
     public void deleteThread(int threadId) {
-        if (VDBG) logd("deleteThread: threadId: " + threadId);
         try {
             IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
             if (iRcs != null) {
                 iRcs.deleteThread(threadId);
             }
         } catch (RemoteException re) {
-
+            Rlog.e(TAG, "RcsMessageStore: Exception happened during deleteThread", re);
         }
     }
 
-    private static void logd(String msg) {
-        Rlog.d(TAG, msg);
+    /**
+     * Creates a new participant and persists it in the storage.
+     * @param canonicalAddress The defining address (e.g. phone number) of the participant.
+     */
+    public RcsParticipant createRcsParticipant(String canonicalAddress) {
+        try {
+            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
+            if (iRcs != null) {
+                return iRcs.createRcsParticipant(canonicalAddress);
+            }
+        } catch (RemoteException re) {
+            Rlog.e(TAG, "RcsMessageStore: Exception happened during createRcsParticipant", re);
+        }
+
+        return null;
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsParticipant.java b/telephony/java/android/telephony/ims/RcsParticipant.java
index 318dba3..70500aa 100644
--- a/telephony/java/android/telephony/ims/RcsParticipant.java
+++ b/telephony/java/android/telephony/ims/RcsParticipant.java
@@ -23,6 +23,16 @@
  * @hide - TODO(sahinc) make this public
  */
 public class RcsParticipant implements Parcelable {
+    /**
+     * Returns the row id of this participant.
+     *
+     * TODO(sahinc) implement
+     * @hide
+     */
+    public int getId() {
+        return 12345;
+    }
+
     public static final Creator<RcsParticipant> CREATOR = new Creator<RcsParticipant>() {
         @Override
         public RcsParticipant createFromParcel(Parcel in) {
diff --git a/telephony/java/android/telephony/ims/RcsThread.java b/telephony/java/android/telephony/ims/RcsThread.java
index 2969ffd..c0a0d94 100644
--- a/telephony/java/android/telephony/ims/RcsThread.java
+++ b/telephony/java/android/telephony/ims/RcsThread.java
@@ -16,7 +16,9 @@
 
 package android.telephony.ims;
 
+import android.os.Parcel;
 import android.os.Parcelable;
+import android.util.Log;
 
 /**
  * RcsThread represents a single RCS conversation thread. It holds messages that were sent and
@@ -24,5 +26,50 @@
  * @hide - TODO(sahinc) make this public
  */
 public abstract class RcsThread implements Parcelable {
+    // Since this is an abstract class that gets parcelled, the sub-classes need to write these
+    // magic values into the parcel so that we know which type to unparcel into.
+    protected static final int RCS_1_TO_1_TYPE = 998;
+    protected static final int RCS_GROUP_TYPE = 999;
 
+    protected int mThreadId;
+
+    protected RcsThread(int threadId) {
+        mThreadId = threadId;
+    }
+
+    protected RcsThread(Parcel in) {
+        mThreadId = in.readInt();
+    }
+
+    public static final Creator<RcsThread> CREATOR = new Creator<RcsThread>() {
+        @Override
+        public RcsThread createFromParcel(Parcel in) {
+            int type = in.readInt();
+
+            switch (type) {
+                case RCS_1_TO_1_TYPE:
+                    return new Rcs1To1Thread(in);
+                case RCS_GROUP_TYPE:
+                    return new RcsGroupThread(in);
+                default:
+                    Log.e(RcsMessageStore.TAG, "Cannot unparcel RcsThread, wrong type: " + type);
+            }
+            return null;
+        }
+
+        @Override
+        public RcsThread[] newArray(int size) {
+            return new RcsThread[0];
+        }
+    };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(mThreadId);
+    }
 }
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.aidl b/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.aidl
new file mode 100644
index 0000000..7bcebfa
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.aidl
@@ -0,0 +1,20 @@
+/*
+**
+** Copyright 2018, 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.telephony.ims;
+
+parcelable RcsThreadQueryContinuationToken;
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.java b/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.java
new file mode 100644
index 0000000..931e93d
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2018 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.telephony.ims;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * A continuation token to provide for {@link RcsMessageStore#getRcsThreads}. Use this token to
+ * break large queries into manageable chunks
+ * @hide - TODO make this public
+ */
+public class RcsThreadQueryContinuationToken implements Parcelable {
+    protected RcsThreadQueryContinuationToken(Parcel in) {
+    }
+
+    public static final Creator<RcsThreadQueryContinuationToken> CREATOR =
+            new Creator<RcsThreadQueryContinuationToken>() {
+                @Override
+                public RcsThreadQueryContinuationToken createFromParcel(Parcel in) {
+                    return new RcsThreadQueryContinuationToken(in);
+                }
+
+                @Override
+                public RcsThreadQueryContinuationToken[] newArray(int size) {
+                    return new RcsThreadQueryContinuationToken[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryParameters.aidl b/telephony/java/android/telephony/ims/RcsThreadQueryParameters.aidl
new file mode 100644
index 0000000..feb2d4d
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsThreadQueryParameters.aidl
@@ -0,0 +1,20 @@
+/*
+**
+** Copyright 2018, 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.telephony.ims;
+
+parcelable RcsThreadQueryParameters;
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryParameters.java b/telephony/java/android/telephony/ims/RcsThreadQueryParameters.java
new file mode 100644
index 0000000..f2c4ab1
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsThreadQueryParameters.java
@@ -0,0 +1,225 @@
+/*
+ * Copyright (C) 2018 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.telephony.ims;
+
+import android.annotation.CheckResult;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.security.InvalidParameterException;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * The parameters to pass into {@link RcsMessageStore#getRcsThreads(RcsThreadQueryParameters)} in
+ * order to select a subset of {@link RcsThread}s present in the message store.
+ * @hide TODO - make the Builder and builder() public. The rest should stay internal only.
+ */
+public class RcsThreadQueryParameters implements Parcelable {
+    private final boolean mIsGroup;
+    private final Set<RcsParticipant> mRcsParticipants;
+    private final int mLimit;
+    private final boolean mIsAscending;
+
+    RcsThreadQueryParameters(boolean isGroup, Set<RcsParticipant> participants, int limit,
+            boolean isAscending) {
+        mIsGroup = isGroup;
+        mRcsParticipants = participants;
+        mLimit = limit;
+        mIsAscending = isAscending;
+    }
+
+    /**
+     * Returns a new builder to build a query with.
+     * TODO - make public
+     */
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    /**
+     * This is used in {@link com.android.internal.telephony.ims.RcsMessageStoreController} to get
+     * the list of participants.
+     * @hide
+     */
+    public Set<RcsParticipant> getRcsParticipants() {
+        return mRcsParticipants;
+    }
+
+    /**
+     * This is used in {@link com.android.internal.telephony.ims.RcsMessageStoreController} to get
+     * whether group threads should be queried
+     * @hide
+     */
+    public boolean isGroupThread() {
+        return mIsGroup;
+    }
+
+    /**
+     * This is used in {@link com.android.internal.telephony.ims.RcsMessageStoreController} to get
+     * the number of tuples the result query should be limited to.
+     */
+    public int getLimit() {
+        return mLimit;
+    }
+
+    /**
+     * This is used in {@link com.android.internal.telephony.ims.RcsMessageStoreController} to
+     * determine the sort order.
+     */
+    public boolean isAscending() {
+        return mIsAscending;
+    }
+
+    /**
+     * A helper class to build the {@link RcsThreadQueryParameters}.
+     */
+    public static class Builder {
+        private boolean mIsGroupThread;
+        private Set<RcsParticipant> mParticipants;
+        private int mLimit = 100;
+        private boolean mIsAscending;
+
+        /**
+         * Package private constructor for {@link RcsThreadQueryParameters.Builder}. To obtain this,
+         * {@link RcsThreadQueryParameters#builder()} needs to be called.
+         */
+        Builder() {
+            mParticipants = new HashSet<>();
+        }
+
+        /**
+         * Limits the query to only return group threads.
+         * @param isGroupThread Whether to limit the query result to group threads.
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder isGroupThread(boolean isGroupThread) {
+            mIsGroupThread = isGroupThread;
+            return this;
+        }
+
+        /**
+         * Limits the query to only return threads that contain the given participant.
+         * @param participant The participant that must be included in all of the returned threads.
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder withParticipant(RcsParticipant participant) {
+            mParticipants.add(participant);
+            return this;
+        }
+
+        /**
+         * Limits the query to only return threads that contain the given list of participants.
+         * @param participants An iterable list of participants that must be included in all of the
+         *                     returned threads.
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder withParticipants(Iterable<RcsParticipant> participants) {
+            for (RcsParticipant participant : participants) {
+                mParticipants.add(participant);
+            }
+            return this;
+        }
+
+        /**
+         * Desired number of threads to be returned from the query. Passing in 0 will return all
+         * existing threads at once. The limit defaults to 100.
+         * @param limit The number to limit the query result to.
+         * @return The same instance of the builder to chain parameters.
+         * @throws InvalidParameterException If the given limit is negative.
+         */
+        @CheckResult
+        public Builder limitResultsTo(int limit) throws InvalidParameterException {
+            if (limit < 0) {
+                throw new InvalidParameterException("The query limit must be non-negative");
+            }
+
+            mLimit = limit;
+            return this;
+        }
+
+        /**
+         * Sorts the results returned from the query via thread IDs.
+         *
+         * TODO - add sorting support for other fields
+         *
+         * @param isAscending whether to sort in ascending order or not
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder sort(boolean isAscending) {
+            mIsAscending = isAscending;
+            return this;
+        }
+
+        /**
+         * Builds the {@link RcsThreadQueryParameters} to use in
+         * {@link RcsMessageStore#getRcsThreads(RcsThreadQueryParameters)}
+         *
+         * @return An instance of {@link RcsThreadQueryParameters} to use with the thread query.
+         */
+        public RcsThreadQueryParameters build() {
+            return new RcsThreadQueryParameters(
+                    mIsGroupThread, mParticipants, mLimit, mIsAscending);
+        }
+    }
+
+    /**
+     * Parcelable boilerplate below.
+     */
+    protected RcsThreadQueryParameters(Parcel in) {
+        mIsGroup = in.readBoolean();
+
+        ArrayList<RcsParticipant> participantArrayList = new ArrayList<>();
+        in.readTypedList(participantArrayList, RcsParticipant.CREATOR);
+        mRcsParticipants = new HashSet<>(participantArrayList);
+
+        mLimit = in.readInt();
+        mIsAscending = in.readBoolean();
+    }
+
+    public static final Creator<RcsThreadQueryParameters> CREATOR =
+            new Creator<RcsThreadQueryParameters>() {
+                @Override
+                public RcsThreadQueryParameters createFromParcel(Parcel in) {
+                    return new RcsThreadQueryParameters(in);
+                }
+
+                @Override
+                public RcsThreadQueryParameters[] newArray(int size) {
+                    return new RcsThreadQueryParameters[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeBoolean(mIsGroup);
+        dest.writeTypedList(new ArrayList<>(mRcsParticipants));
+        dest.writeInt(mLimit);
+        dest.writeBoolean(mIsAscending);
+    }
+
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryResult.aidl b/telephony/java/android/telephony/ims/RcsThreadQueryResult.aidl
new file mode 100644
index 0000000..4b06529
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsThreadQueryResult.aidl
@@ -0,0 +1,20 @@
+/*
+**
+** Copyright 2018, 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.telephony.ims;
+
+parcelable RcsThreadQueryResult;
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryResult.java b/telephony/java/android/telephony/ims/RcsThreadQueryResult.java
new file mode 100644
index 0000000..47715f8
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsThreadQueryResult.java
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2018 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.telephony.ims;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.List;
+
+/**
+ * The result of a {@link RcsMessageStore#getRcsThreads(RcsThreadQueryContinuationToken,
+ * RcsThreadQueryParameters)}
+ * call. This class allows getting the token for querying the next batch of threads in order to
+ * prevent handling large amounts of data at once.
+ *
+ * @hide
+ */
+public class RcsThreadQueryResult implements Parcelable {
+    private RcsThreadQueryContinuationToken mContinuationToken;
+    private List<RcsThread> mRcsThreads;
+
+    /**
+     * Internal constructor for {@link com.android.internal.telephony.ims.RcsMessageStoreController}
+     * to create query results
+     *
+     * @hide
+     */
+    public RcsThreadQueryResult(
+            RcsThreadQueryContinuationToken continuationToken, List<RcsThread> rcsThreads) {
+        mContinuationToken = continuationToken;
+        mRcsThreads = rcsThreads;
+    }
+
+    /**
+     * Returns a token to call
+     * {@link RcsMessageStore#getRcsThreads(RcsThreadQueryContinuationToken)}
+     * to get the next batch of {@link RcsThread}s.
+     */
+    public RcsThreadQueryContinuationToken nextChunkToken() {
+        return mContinuationToken;
+    }
+
+    /**
+     * Returns all the RcsThreads in the current query result. Call {@link
+     * RcsMessageStore#getRcsThreads(RcsThreadQueryContinuationToken)} to get the next batch of
+     * {@link RcsThread}s.
+     */
+    public List<RcsThread> getThreads() {
+        return mRcsThreads;
+    }
+
+    protected RcsThreadQueryResult(Parcel in) {
+        // TODO - implement
+    }
+
+    public static final Creator<RcsThreadQueryResult> CREATOR =
+            new Creator<RcsThreadQueryResult>() {
+                @Override
+                public RcsThreadQueryResult createFromParcel(Parcel in) {
+                    return new RcsThreadQueryResult(in);
+                }
+
+                @Override
+                public RcsThreadQueryResult[] newArray(int size) {
+                    return new RcsThreadQueryResult[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        // TODO - implement
+    }
+}
diff --git a/telephony/java/android/telephony/ims/aidl/IRcs.aidl b/telephony/java/android/telephony/ims/aidl/IRcs.aidl
index b2e2fad..9badac5 100644
--- a/telephony/java/android/telephony/ims/aidl/IRcs.aidl
+++ b/telephony/java/android/telephony/ims/aidl/IRcs.aidl
@@ -16,14 +16,29 @@
 
 package android.telephony.ims.aidl;
 
+import android.telephony.ims.RcsParticipant;
+import android.telephony.ims.Rcs1To1Thread;
+import android.telephony.ims.RcsThreadQueryContinuationToken;
+import android.telephony.ims.RcsThreadQueryParameters;
+import android.telephony.ims.RcsThreadQueryResult;
+
 /**
  * RPC definition between RCS storage APIs and phone process.
  * {@hide}
  */
 interface IRcs {
     // RcsMessageStore APIs
+    RcsThreadQueryResult getRcsThreads(in RcsThreadQueryParameters queryParameters);
+
+    RcsThreadQueryResult getRcsThreadsWithToken(
+        in RcsThreadQueryContinuationToken continuationToken);
+
     void deleteThread(int threadId);
 
+    Rcs1To1Thread createRcs1To1Thread(in RcsParticipant participant);
+
+    RcsParticipant createRcsParticipant(String canonicalAddress);
+
     // RcsThread APIs
     int getMessageCount(int rcsThreadId);
 }
\ No newline at end of file
diff --git a/telephony/java/com/android/internal/telephony/DctConstants.java b/telephony/java/com/android/internal/telephony/DctConstants.java
index 0fdca5d..96f7a1b 100644
--- a/telephony/java/com/android/internal/telephony/DctConstants.java
+++ b/telephony/java/com/android/internal/telephony/DctConstants.java
@@ -24,7 +24,7 @@
     /**
      * IDLE: ready to start data connection setup, default state
      * CONNECTING: state of issued startPppd() but not finish yet
-     * SCANNING: data connection fails with one apn but other apns are available
+     * RETRYING: data connection fails with one apn but other apns are available
      *           ready to start data connection on other apns (before INITING)
      * CONNECTED: IP connection is setup
      * DISCONNECTING: Connection.disconnect() has been called, but PDP
@@ -34,19 +34,16 @@
      *
      * getDataConnectionState() maps State to DataState
      *      FAILED or IDLE : DISCONNECTED
-     *      RETRYING or CONNECTING or SCANNING: CONNECTING
+     *      RETRYING or CONNECTING: CONNECTING
      *      CONNECTED : CONNECTED or DISCONNECTING
      */
     public enum State {
         IDLE,
         CONNECTING,
-        SCANNING,
+        RETRYING,
         CONNECTED,
         DISCONNECTING,
         FAILED,
-        RETRYING        // After moving retry manager to ApnContext, we'll never enter this state!
-                        // Todo: Remove this state and other places that use this state and then
-                        // rename SCANNING to RETRYING.
     }
 
     public enum Activity {
@@ -81,7 +78,6 @@
     public static final int EVENT_RESTART_RADIO = BASE + 26;
     public static final int EVENT_CLEAN_UP_ALL_CONNECTIONS = BASE + 29;
     public static final int EVENT_ICC_CHANGED = BASE + 33;
-    public static final int EVENT_DISCONNECT_DC_RETRYING = BASE + 34;
     public static final int EVENT_DATA_SETUP_COMPLETE_ERROR = BASE + 35;
     public static final int CMD_SET_ENABLE_FAIL_FAST_MOBILE_DATA = BASE + 36;
     public static final int CMD_ENABLE_MOBILE_PROVISIONING = BASE + 37;
diff --git a/telephony/java/com/android/internal/telephony/ITelephonyRegistry.aidl b/telephony/java/com/android/internal/telephony/ITelephonyRegistry.aidl
index d9f5c3f..02a6f31 100644
--- a/telephony/java/com/android/internal/telephony/ITelephonyRegistry.aidl
+++ b/telephony/java/com/android/internal/telephony/ITelephonyRegistry.aidl
@@ -50,13 +50,13 @@
     void notifyDataActivity(int state);
     void notifyDataActivityForSubscriber(in int subId, int state);
     void notifyDataConnection(int state, boolean isDataConnectivityPossible,
-            String reason, String apn, String apnType, in LinkProperties linkProperties,
+            String apn, String apnType, in LinkProperties linkProperties,
             in NetworkCapabilities networkCapabilities, int networkType, boolean roaming);
     void notifyDataConnectionForSubscriber(int subId, int state, boolean isDataConnectivityPossible,
-            String reason, String apn, String apnType, in LinkProperties linkProperties,
+            String apn, String apnType, in LinkProperties linkProperties,
             in NetworkCapabilities networkCapabilities, int networkType, boolean roaming);
-    void notifyDataConnectionFailed(String reason, String apnType);
-    void notifyDataConnectionFailedForSubscriber(int subId, String reason, String apnType);
+    void notifyDataConnectionFailed(String apnType);
+    void notifyDataConnectionFailedForSubscriber(int subId, String apnType);
     void notifyCellLocation(in Bundle cellLocation);
     void notifyCellLocationForSubscriber(in int subId, in Bundle cellLocation);
     void notifyOtaspChanged(in int otaspMode);
@@ -67,7 +67,7 @@
     void notifyPreciseCallState(int ringingCallState, int foregroundCallState,
             int backgroundCallState);
     void notifyDisconnectCause(int disconnectCause, int preciseDisconnectCause);
-    void notifyPreciseDataConnectionFailed(String reason, String apnType, String apn,
+    void notifyPreciseDataConnectionFailed(String apnType, String apn,
             String failCause);
     void notifyCellInfoForSubscriber(in int subId, in List<CellInfo> cellInfo);
     void notifySrvccStateChanged(in int subId, in int lteState);
diff --git a/telephony/java/com/android/internal/telephony/PhoneConstants.java b/telephony/java/com/android/internal/telephony/PhoneConstants.java
index 21f3b92..e87d28c 100644
--- a/telephony/java/com/android/internal/telephony/PhoneConstants.java
+++ b/telephony/java/com/android/internal/telephony/PhoneConstants.java
@@ -79,8 +79,6 @@
     public static final int SIM_ACTIVATION_TYPE_DATA = 1;
 
     public static final String PHONE_NAME_KEY = "phoneName";
-    public static final String FAILURE_REASON_KEY = "reason";
-    public static final String STATE_CHANGE_REASON_KEY = "reason";
     public static final String DATA_NETWORK_TYPE_KEY = "networkType";
     public static final String DATA_FAILURE_CAUSE_KEY = "failCause";
     public static final String DATA_APN_TYPE_KEY = "apnType";
diff --git a/tests/RcsTests/Android.mk b/tests/RcsTests/Android.mk
index adc7cab..7b348d7 100644
--- a/tests/RcsTests/Android.mk
+++ b/tests/RcsTests/Android.mk
@@ -11,7 +11,7 @@
 
 LOCAL_CERTIFICATE := platform
 LOCAL_JAVA_LIBRARIES := android.test.runner android.test.base
-LOCAL_STATIC_JAVA_LIBRARIES := junit android-support-test mockito-target-minus-junit4
+LOCAL_STATIC_JAVA_LIBRARIES := junit android-support-test mockito-target-minus-junit4 truth-prebuilt
 
 include $(BUILD_PACKAGE)
 
diff --git a/tests/RcsTests/src/com/android/tests/rcs/RcsMessageStoreTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsMessageStoreTest.java
similarity index 97%
rename from tests/RcsTests/src/com/android/tests/rcs/RcsMessageStoreTest.java
rename to tests/RcsTests/src/com/android/tests/ims/RcsMessageStoreTest.java
index 290e04c..44277ed 100644
--- a/tests/RcsTests/src/com/android/tests/rcs/RcsMessageStoreTest.java
+++ b/tests/RcsTests/src/com/android/tests/ims/RcsMessageStoreTest.java
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.android.tests.rcs;
+package com.android.tests.ims;
 
 import android.support.test.runner.AndroidJUnit4;
 import android.telephony.ims.RcsMessageStore;
diff --git a/tests/RcsTests/src/com/android/tests/ims/RcsThreadQueryParametersTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsThreadQueryParametersTest.java
new file mode 100644
index 0000000..a890a38
--- /dev/null
+++ b/tests/RcsTests/src/com/android/tests/ims/RcsThreadQueryParametersTest.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2018 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.tests.ims;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Bundle;
+import android.support.test.runner.AndroidJUnit4;
+import android.telephony.ims.RcsParticipant;
+import android.telephony.ims.RcsThreadQueryParameters;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+
+@RunWith(AndroidJUnit4.class)
+public class RcsThreadQueryParametersTest {
+    private RcsThreadQueryParameters mRcsThreadQueryParameters;
+    @Mock RcsParticipant mMockParticipant;
+
+    @Test
+    public void testUnparceling() {
+        String key = "some key";
+        mRcsThreadQueryParameters = RcsThreadQueryParameters.builder()
+                .isGroupThread(true)
+                .withParticipant(mMockParticipant)
+                .limitResultsTo(50)
+                .sort(true)
+                .build();
+
+        Bundle bundle = new Bundle();
+        bundle.putParcelable(key, mRcsThreadQueryParameters);
+        mRcsThreadQueryParameters = bundle.getParcelable(key);
+
+        assertThat(mRcsThreadQueryParameters.isGroupThread()).isTrue();
+        assertThat(mRcsThreadQueryParameters.getRcsParticipants()).contains(mMockParticipant);
+        assertThat(mRcsThreadQueryParameters.getLimit()).isEqualTo(50);
+        assertThat(mRcsThreadQueryParameters.isAscending()).isTrue();
+    }
+}