| /* | 
 |  * Copyright (C) 2013 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.telecom; | 
 |  | 
 | import android.annotation.CallbackExecutor; | 
 | import android.annotation.NonNull; | 
 | import android.annotation.SdkConstant; | 
 | import android.annotation.SystemApi; | 
 | import android.app.Service; | 
 | import android.app.UiModeManager; | 
 | import android.bluetooth.BluetoothDevice; | 
 | import android.content.ComponentName; | 
 | import android.content.Intent; | 
 | import android.hardware.camera2.CameraManager; | 
 | import android.net.Uri; | 
 | import android.os.Bundle; | 
 | import android.os.Handler; | 
 | import android.os.IBinder; | 
 | import android.os.Looper; | 
 | import android.os.Message; | 
 | import android.os.OutcomeReceiver; | 
 | import android.view.Surface; | 
 |  | 
 | import com.android.internal.os.SomeArgs; | 
 | import com.android.internal.telecom.IInCallAdapter; | 
 | import com.android.internal.telecom.IInCallService; | 
 |  | 
 | import java.util.Collections; | 
 | import java.util.List; | 
 | import java.util.Objects; | 
 | import java.util.concurrent.Executor; | 
 |  | 
 | /** | 
 |  * This service is implemented by an app that wishes to provide functionality for managing | 
 |  * phone calls. | 
 |  * <h2>Becoming the Default Phone App</h2> | 
 |  * The default dialer/phone app is one which provides the in-call user interface while the device is | 
 |  * in a call.  It also provides the user with a means to initiate calls and see a history of calls | 
 |  * on their device.  A device is bundled with a system provided default dialer/phone app.  The user | 
 |  * may choose a single app to take over this role from the system app.  An app which wishes to | 
 |  * fulfill this role uses the {@link android.app.role.RoleManager} to request that they fill the | 
 |  * {@link android.app.role.RoleManager#ROLE_DIALER} role. | 
 |  * <p> | 
 |  * The default phone app provides a user interface while the device is in a call, and the device is | 
 |  * not in car mode (i.e. {@link UiModeManager#getCurrentModeType()} is not | 
 |  * {@link android.content.res.Configuration#UI_MODE_TYPE_CAR}). | 
 |  * <p> | 
 |  * In order to fill the {@link android.app.role.RoleManager#ROLE_DIALER} role, an app must meet a | 
 |  * number of requirements: | 
 |  * <ul> | 
 |  *     <li>It must handle the {@link Intent#ACTION_DIAL} intent.  This means the app must provide | 
 |  *     a dial pad UI for the user to initiate outgoing calls.</li> | 
 |  *     <li>It must fully implement the {@link InCallService} API and provide both an incoming call | 
 |  *     UI, as well as an ongoing call UI.</li> | 
 |  * </ul> | 
 |  * <p> | 
 |  * Note: If the app filling the {@link android.app.role.RoleManager#ROLE_DIALER} returns a | 
 |  * {@code null} {@link InCallService} during binding, the Telecom framework will automatically fall | 
 |  * back to using the dialer app preloaded on the device.  The system will display a notification to | 
 |  * the user to let them know that their call was continued using the preloaded dialer app.  Your | 
 |  * app should never return a {@code null} binding; doing so means it does not fulfil the | 
 |  * requirements of {@link android.app.role.RoleManager#ROLE_DIALER}. | 
 |  * <p> | 
 |  * Note: If your app fills {@link android.app.role.RoleManager#ROLE_DIALER} and makes changes at | 
 |  * runtime which cause it to no longer fulfil the requirements of this role, | 
 |  * {@link android.app.role.RoleManager} will automatically remove your app from the role and close | 
 |  * your app.  For example, if you use | 
 |  * {@link android.content.pm.PackageManager#setComponentEnabledSetting(ComponentName, int, int)} to | 
 |  * programmatically disable the {@link InCallService} your app declares in its manifest, your app | 
 |  * will no longer fulfil the requirements expected of | 
 |  * {@link android.app.role.RoleManager#ROLE_DIALER}. | 
 |  * <p> | 
 |  * The preloaded dialer will ALWAYS be used when the user places an emergency call, even if your | 
 |  * app fills the {@link android.app.role.RoleManager#ROLE_DIALER} role.  To ensure an optimal | 
 |  * experience when placing an emergency call, the default dialer should ALWAYS use | 
 |  * {@link android.telecom.TelecomManager#placeCall(Uri, Bundle)} to place calls (including | 
 |  * emergency calls).  This ensures that the platform is able to verify that the request came from | 
 |  * the default dialer.  If a non-preloaded dialer app uses {@link Intent#ACTION_CALL} to place an | 
 |  * emergency call, it will be raised to the preloaded dialer app using {@link Intent#ACTION_DIAL} | 
 |  * for confirmation; this is a suboptimal user experience. | 
 |  * <p> | 
 |  * Below is an example manifest registration for an {@code InCallService}. The meta-data | 
 |  * {@link TelecomManager#METADATA_IN_CALL_SERVICE_UI} indicates that this particular | 
 |  * {@code InCallService} implementation intends to replace the built-in in-call UI. | 
 |  * The meta-data {@link TelecomManager#METADATA_IN_CALL_SERVICE_RINGING} indicates that this | 
 |  * {@link InCallService} will play the ringtone for incoming calls.  See | 
 |  * <a href="#incomingCallNotification">below</a> for more information on showing the incoming call | 
 |  * UI and playing the ringtone in your app. | 
 |  * <pre> | 
 |  * {@code | 
 |  * <service android:name="your.package.YourInCallServiceImplementation" | 
 |  *          android:permission="android.permission.BIND_INCALL_SERVICE" | 
 |  *          android:exported="true"> | 
 |  *      <meta-data android:name="android.telecom.IN_CALL_SERVICE_UI" android:value="true" /> | 
 |  *      <meta-data android:name="android.telecom.IN_CALL_SERVICE_RINGING" | 
 |  *          android:value="true" /> | 
 |  *      <intent-filter> | 
 |  *          <action android:name="android.telecom.InCallService"/> | 
 |  *      </intent-filter> | 
 |  * </service> | 
 |  * } | 
 |  * </pre> | 
 |  * | 
 |  * <em>Note: You should NOT mark your {@link InCallService} with the attribute | 
 |  * {@code android:exported="false"}; doing so can result in a failure to bind to your implementation | 
 |  * during calls.</em> | 
 |  * <p> | 
 |  * In addition to implementing the {@link InCallService} API, you must also declare an activity in | 
 |  * your manifest which handles the {@link Intent#ACTION_DIAL} intent.  The example below illustrates | 
 |  * how this is done: | 
 |  * <pre> | 
 |  * {@code | 
 |  * <activity android:name="your.package.YourDialerActivity" | 
 |  *           android:label="@string/yourDialerActivityLabel"> | 
 |  *      <intent-filter> | 
 |  *           <action android:name="android.intent.action.DIAL" /> | 
 |  *           <category android:name="android.intent.category.DEFAULT" /> | 
 |  *      </intent-filter> | 
 |  *      <intent-filter> | 
 |  *           <action android:name="android.intent.action.DIAL" /> | 
 |  *           <category android:name="android.intent.category.DEFAULT" /> | 
 |  *           <data android:scheme="tel" /> | 
 |  *      </intent-filter> | 
 |  * </activity> | 
 |  * } | 
 |  * </pre> | 
 |  * <p> | 
 |  * When a user installs your application and runs it for the first time, you should use the | 
 |  * {@link android.app.role.RoleManager} to prompt the user to see if they would like your app to | 
 |  * be the new default phone app. | 
 |  * <p id="requestRole"> | 
 |  * The code below shows how your app can request to become the default phone/dialer app: | 
 |  * <pre> | 
 |  * {@code | 
 |  * private static final int REQUEST_ID = 1; | 
 |  * | 
 |  * public void requestRole() { | 
 |  *     RoleManager roleManager = (RoleManager) getSystemService(ROLE_SERVICE); | 
 |  *     Intent intent = roleManager.createRequestRoleIntent(RoleManager.ROLE_DIALER); | 
 |  *     startActivityForResult(intent, REQUEST_ID); | 
 |  * } | 
 |  * | 
 |  * @Override | 
 |  * public void onActivityResult(int requestCode, int resultCode, Intent data) { | 
 |  *     if (requestCode == REQUEST_ID) { | 
 |  *         if (resultCode == android.app.Activity.RESULT_OK) { | 
 |  *             // Your app is now the default dialer app | 
 |  *         } else { | 
 |  *             // Your app is not the default dialer app | 
 |  *         } | 
 |  *     } | 
 |  * } | 
 |  * } | 
 |  * | 
 |  * </pre> | 
 |  * <p id="companionInCallService"> | 
 |  * <h3>Access to InCallService for Wearable Devices</h3> | 
 |  * <ol> | 
 |  * If your app is a third-party companion app and wants to access InCallService APIs, what your | 
 |  * app could do are: | 
 |  * <p> | 
 |  *   <ol> | 
 |  *     <li> Declare MANAGE_ONGOING_CALLS permission in your manifest | 
 |  *     <li> Associate with a physical wearable device via the | 
 |  *          {@link android.companion.CompanionDeviceManager} API as a companion app. See: | 
 |  *          https://developer.android.com/guide/topics/connectivity/companion-device-pairing | 
 |  *     <li> Implement this InCallService with BIND_INCALL_SERVICE permission | 
 |  *   </ol> | 
 |  * </ol> | 
 |  * <p> | 
 |  * | 
 |  * </pre> | 
 |  * <p id="incomingCallNotification"> | 
 |  * <h3>Showing the Incoming Call Notification</h3> | 
 |  * When your app receives a new incoming call via {@link InCallService#onCallAdded(Call)}, it is | 
 |  * responsible for displaying an incoming call UI for the incoming call.  It should do this using | 
 |  * {@link android.app.NotificationManager} APIs to post a new incoming call notification. | 
 |  * <p> | 
 |  * Where your app declares the meta-data {@link TelecomManager#METADATA_IN_CALL_SERVICE_RINGING}, it | 
 |  * is responsible for playing the ringtone for incoming calls.  Your app should create a | 
 |  * {@link android.app.NotificationChannel} which specifies the desired ringtone.  For example: | 
 |  * <pre><code> | 
 |  * NotificationChannel channel = new NotificationChannel(YOUR_CHANNEL_ID, "Incoming Calls", | 
 |  *          NotificationManager.IMPORTANCE_MAX); | 
 |  * // other channel setup stuff goes here. | 
 |  * | 
 |  * // We'll use the default system ringtone for our incoming call notification channel.  You can | 
 |  * // use your own audio resource here. | 
 |  * Uri ringtoneUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE); | 
 |  * channel.setSound(ringtoneUri, new AudioAttributes.Builder() | 
 |  *          // Setting the AudioAttributes is important as it identifies the purpose of your | 
 |  *          // notification sound. | 
 |  *          .setUsage(AudioAttributes.USAGE_NOTIFICATION_RINGTONE) | 
 |  *          .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION) | 
 |  *      .build()); | 
 |  * | 
 |  * NotificationManager mgr = getSystemService(NotificationManager.class); | 
 |  * mgr.createNotificationChannel(channel); | 
 |  * </code></pre> | 
 |  * <p> | 
 |  * When your app receives a new incoming call, it creates a {@link android.app.Notification} for the | 
 |  * incoming call and associates it with your incoming call notification channel. You can specify a | 
 |  * {@link android.app.PendingIntent} on the notification which will launch your full screen | 
 |  * incoming call UI.  The notification manager framework will display your notification as a | 
 |  * heads-up notification if the user is actively using the phone.  When the user is not using the | 
 |  * phone, your full-screen incoming call UI is used instead. | 
 |  * For example: | 
 |  * <pre><code>{@code | 
 |  * // Create an intent which triggers your fullscreen incoming call user interface. | 
 |  * Intent intent = new Intent(Intent.ACTION_MAIN, null); | 
 |  * intent.setFlags(Intent.FLAG_ACTIVITY_NO_USER_ACTION | Intent.FLAG_ACTIVITY_NEW_TASK); | 
 |  * intent.setClass(context, YourIncomingCallActivity.class); | 
 |  * PendingIntent pendingIntent = PendingIntent.getActivity(context, 1, intent, PendingIntent.FLAG_MUTABLE_UNAUDITED); | 
 |  * | 
 |  * // Build the notification as an ongoing high priority item; this ensures it will show as | 
 |  * // a heads up notification which slides down over top of the current content. | 
 |  * final Notification.Builder builder = new Notification.Builder(context); | 
 |  * builder.setOngoing(true); | 
 |  * builder.setPriority(Notification.PRIORITY_HIGH); | 
 |  * | 
 |  * // Set notification content intent to take user to the fullscreen UI if user taps on the | 
 |  * // notification body. | 
 |  * builder.setContentIntent(pendingIntent); | 
 |  * // Set full screen intent to trigger display of the fullscreen UI when the notification | 
 |  * // manager deems it appropriate. | 
 |  * builder.setFullScreenIntent(pendingIntent, true); | 
 |  * | 
 |  * // Setup notification content. | 
 |  * builder.setSmallIcon( yourIconResourceId ); | 
 |  * builder.setContentTitle("Your notification title"); | 
 |  * builder.setContentText("Your notification content."); | 
 |  * | 
 |  * // Use builder.addAction(..) to add buttons to answer or reject the call. | 
 |  * | 
 |  * NotificationManager notificationManager = mContext.getSystemService( | 
 |  *     NotificationManager.class); | 
 |  * notificationManager.notify(YOUR_CHANNEL_ID, YOUR_TAG, YOUR_ID, builder.build()); | 
 |  * }</pre> | 
 |  * <p> | 
 |  */ | 
 | public abstract class InCallService extends Service { | 
 |  | 
 |     /** | 
 |      * The {@link Intent} that must be declared as handled by the service. | 
 |      */ | 
 |     @SdkConstant(SdkConstant.SdkConstantType.SERVICE_ACTION) | 
 |     public static final String SERVICE_INTERFACE = "android.telecom.InCallService"; | 
 |  | 
 |     private static final int MSG_SET_IN_CALL_ADAPTER = 1; | 
 |     private static final int MSG_ADD_CALL = 2; | 
 |     private static final int MSG_UPDATE_CALL = 3; | 
 |     private static final int MSG_SET_POST_DIAL_WAIT = 4; | 
 |     private static final int MSG_ON_CALL_AUDIO_STATE_CHANGED = 5; | 
 |     private static final int MSG_BRING_TO_FOREGROUND = 6; | 
 |     private static final int MSG_ON_CAN_ADD_CALL_CHANGED = 7; | 
 |     private static final int MSG_SILENCE_RINGER = 8; | 
 |     private static final int MSG_ON_CONNECTION_EVENT = 9; | 
 |     private static final int MSG_ON_RTT_UPGRADE_REQUEST = 10; | 
 |     private static final int MSG_ON_RTT_INITIATION_FAILURE = 11; | 
 |     private static final int MSG_ON_HANDOVER_FAILED = 12; | 
 |     private static final int MSG_ON_HANDOVER_COMPLETE = 13; | 
 |     private static final int MSG_ON_CALL_ENDPOINT_CHANGED = 14; | 
 |     private static final int MSG_ON_AVAILABLE_CALL_ENDPOINTS_CHANGED = 15; | 
 |     private static final int MSG_ON_MUTE_STATE_CHANGED = 16; | 
 |  | 
 |     private CallEndpoint mCallEndpoint; | 
 |  | 
 |     /** Default Handler used to consolidate binder method calls onto a single thread. */ | 
 |     private final Handler mHandler = new Handler(Looper.getMainLooper()) { | 
 |         @Override | 
 |         public void handleMessage(Message msg) { | 
 |             if (mPhone == null && msg.what != MSG_SET_IN_CALL_ADAPTER) { | 
 |                 return; | 
 |             } | 
 |  | 
 |             switch (msg.what) { | 
 |                 case MSG_SET_IN_CALL_ADAPTER: | 
 |                     if (mPhone != null) { | 
 |                         Log.i(this, "mPhone is already instantiated, ignoring " | 
 |                                 + "request to reset adapter."); | 
 |                         break; | 
 |                     } | 
 |                     String callingPackage = getApplicationContext().getOpPackageName(); | 
 |                     mPhone = new Phone(new InCallAdapter((IInCallAdapter) msg.obj), callingPackage, | 
 |                             getApplicationContext().getApplicationInfo().targetSdkVersion); | 
 |                     mPhone.addListener(mPhoneListener); | 
 |                     onPhoneCreated(mPhone); | 
 |                     break; | 
 |                 case MSG_ADD_CALL: | 
 |                     mPhone.internalAddCall((ParcelableCall) msg.obj); | 
 |                     break; | 
 |                 case MSG_UPDATE_CALL: | 
 |                     mPhone.internalUpdateCall((ParcelableCall) msg.obj); | 
 |                     break; | 
 |                 case MSG_SET_POST_DIAL_WAIT: { | 
 |                     SomeArgs args = (SomeArgs) msg.obj; | 
 |                     try { | 
 |                         String callId = (String) args.arg1; | 
 |                         String remaining = (String) args.arg2; | 
 |                         mPhone.internalSetPostDialWait(callId, remaining); | 
 |                     } finally { | 
 |                         args.recycle(); | 
 |                     } | 
 |                     break; | 
 |                 } | 
 |                 case MSG_ON_CALL_AUDIO_STATE_CHANGED: | 
 |                     mPhone.internalCallAudioStateChanged((CallAudioState) msg.obj); | 
 |                     break; | 
 |                 case MSG_BRING_TO_FOREGROUND: | 
 |                     mPhone.internalBringToForeground(msg.arg1 == 1); | 
 |                     break; | 
 |                 case MSG_ON_CAN_ADD_CALL_CHANGED: | 
 |                     mPhone.internalSetCanAddCall(msg.arg1 == 1); | 
 |                     break; | 
 |                 case MSG_SILENCE_RINGER: | 
 |                     mPhone.internalSilenceRinger(); | 
 |                     break; | 
 |                 case MSG_ON_CONNECTION_EVENT: { | 
 |                     SomeArgs args = (SomeArgs) msg.obj; | 
 |                     try { | 
 |                         String callId = (String) args.arg1; | 
 |                         String event = (String) args.arg2; | 
 |                         Bundle extras = (Bundle) args.arg3; | 
 |                         mPhone.internalOnConnectionEvent(callId, event, extras); | 
 |                     } finally { | 
 |                         args.recycle(); | 
 |                     } | 
 |                     break; | 
 |                 } | 
 |                 case MSG_ON_RTT_UPGRADE_REQUEST: { | 
 |                     String callId = (String) msg.obj; | 
 |                     int requestId = msg.arg1; | 
 |                     mPhone.internalOnRttUpgradeRequest(callId, requestId); | 
 |                     break; | 
 |                 } | 
 |                 case MSG_ON_RTT_INITIATION_FAILURE: { | 
 |                     String callId = (String) msg.obj; | 
 |                     int reason = msg.arg1; | 
 |                     mPhone.internalOnRttInitiationFailure(callId, reason); | 
 |                     break; | 
 |                 } | 
 |                 case MSG_ON_HANDOVER_FAILED: { | 
 |                     String callId = (String) msg.obj; | 
 |                     int error = msg.arg1; | 
 |                     mPhone.internalOnHandoverFailed(callId, error); | 
 |                     break; | 
 |                 } | 
 |                 case MSG_ON_HANDOVER_COMPLETE: { | 
 |                     String callId = (String) msg.obj; | 
 |                     mPhone.internalOnHandoverComplete(callId); | 
 |                     break; | 
 |                 } | 
 |                 case MSG_ON_CALL_ENDPOINT_CHANGED: { | 
 |                     CallEndpoint endpoint = (CallEndpoint) msg.obj; | 
 |                     if (!Objects.equals(mCallEndpoint, endpoint)) { | 
 |                         mCallEndpoint = endpoint; | 
 |                         InCallService.this.onCallEndpointChanged(mCallEndpoint); | 
 |                     } | 
 |                     break; | 
 |                 } | 
 |                 case MSG_ON_AVAILABLE_CALL_ENDPOINTS_CHANGED: { | 
 |                     InCallService.this.onAvailableCallEndpointsChanged( | 
 |                             (List<CallEndpoint>) msg.obj); | 
 |                     break; | 
 |                 } | 
 |                 case MSG_ON_MUTE_STATE_CHANGED: { | 
 |                     InCallService.this.onMuteStateChanged((boolean) msg.obj); | 
 |                     break; | 
 |                 } | 
 |                 default: | 
 |                     break; | 
 |             } | 
 |         } | 
 |     }; | 
 |  | 
 |     /** Manages the binder calls so that the implementor does not need to deal with it. */ | 
 |     private final class InCallServiceBinder extends IInCallService.Stub { | 
 |         @Override | 
 |         public void setInCallAdapter(IInCallAdapter inCallAdapter) { | 
 |             mHandler.obtainMessage(MSG_SET_IN_CALL_ADAPTER, inCallAdapter).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void addCall(ParcelableCall call) { | 
 |             mHandler.obtainMessage(MSG_ADD_CALL, call).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void updateCall(ParcelableCall call) { | 
 |             mHandler.obtainMessage(MSG_UPDATE_CALL, call).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void setPostDial(String callId, String remaining) { | 
 |             // TODO: Unused | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void setPostDialWait(String callId, String remaining) { | 
 |             SomeArgs args = SomeArgs.obtain(); | 
 |             args.arg1 = callId; | 
 |             args.arg2 = remaining; | 
 |             mHandler.obtainMessage(MSG_SET_POST_DIAL_WAIT, args).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void onCallAudioStateChanged(CallAudioState callAudioState) { | 
 |             mHandler.obtainMessage(MSG_ON_CALL_AUDIO_STATE_CHANGED, callAudioState).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void onCallEndpointChanged(CallEndpoint callEndpoint) { | 
 |             mHandler.obtainMessage(MSG_ON_CALL_ENDPOINT_CHANGED, callEndpoint).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void onAvailableCallEndpointsChanged(List<CallEndpoint> availableEndpoints) { | 
 |             mHandler.obtainMessage(MSG_ON_AVAILABLE_CALL_ENDPOINTS_CHANGED, availableEndpoints) | 
 |                     .sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void onMuteStateChanged(boolean isMuted) { | 
 |             mHandler.obtainMessage(MSG_ON_MUTE_STATE_CHANGED, isMuted).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void bringToForeground(boolean showDialpad) { | 
 |             mHandler.obtainMessage(MSG_BRING_TO_FOREGROUND, showDialpad ? 1 : 0, 0).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void onCanAddCallChanged(boolean canAddCall) { | 
 |             mHandler.obtainMessage(MSG_ON_CAN_ADD_CALL_CHANGED, canAddCall ? 1 : 0, 0) | 
 |                     .sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void silenceRinger() { | 
 |             mHandler.obtainMessage(MSG_SILENCE_RINGER).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void onConnectionEvent(String callId, String event, Bundle extras) { | 
 |             SomeArgs args = SomeArgs.obtain(); | 
 |             args.arg1 = callId; | 
 |             args.arg2 = event; | 
 |             args.arg3 = extras; | 
 |             mHandler.obtainMessage(MSG_ON_CONNECTION_EVENT, args).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void onRttUpgradeRequest(String callId, int id) { | 
 |             mHandler.obtainMessage(MSG_ON_RTT_UPGRADE_REQUEST, id, 0, callId).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void onRttInitiationFailure(String callId, int reason) { | 
 |             mHandler.obtainMessage(MSG_ON_RTT_INITIATION_FAILURE, reason, 0, callId).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void onHandoverFailed(String callId, int error) { | 
 |             mHandler.obtainMessage(MSG_ON_HANDOVER_FAILED, error, 0, callId).sendToTarget(); | 
 |         } | 
 |  | 
 |         @Override | 
 |         public void onHandoverComplete(String callId) { | 
 |             mHandler.obtainMessage(MSG_ON_HANDOVER_COMPLETE, callId).sendToTarget(); | 
 |         } | 
 |     } | 
 |  | 
 |     private Phone.Listener mPhoneListener = new Phone.Listener() { | 
 |         /** ${inheritDoc} */ | 
 |         @Override | 
 |         public void onAudioStateChanged(Phone phone, AudioState audioState) { | 
 |             InCallService.this.onAudioStateChanged(audioState); | 
 |         } | 
 |  | 
 |         public void onCallAudioStateChanged(Phone phone, CallAudioState callAudioState) { | 
 |             InCallService.this.onCallAudioStateChanged(callAudioState); | 
 |         }; | 
 |  | 
 |         /** ${inheritDoc} */ | 
 |         @Override | 
 |         public void onBringToForeground(Phone phone, boolean showDialpad) { | 
 |             InCallService.this.onBringToForeground(showDialpad); | 
 |         } | 
 |  | 
 |         /** ${inheritDoc} */ | 
 |         @Override | 
 |         public void onCallAdded(Phone phone, Call call) { | 
 |             InCallService.this.onCallAdded(call); | 
 |         } | 
 |  | 
 |         /** ${inheritDoc} */ | 
 |         @Override | 
 |         public void onCallRemoved(Phone phone, Call call) { | 
 |             InCallService.this.onCallRemoved(call); | 
 |         } | 
 |  | 
 |         /** ${inheritDoc} */ | 
 |         @Override | 
 |         public void onCanAddCallChanged(Phone phone, boolean canAddCall) { | 
 |             InCallService.this.onCanAddCallChanged(canAddCall); | 
 |         } | 
 |  | 
 |         /** ${inheritDoc} */ | 
 |         @Override | 
 |         public void onSilenceRinger(Phone phone) { | 
 |             InCallService.this.onSilenceRinger(); | 
 |         } | 
 |  | 
 |     }; | 
 |  | 
 |     private Phone mPhone; | 
 |  | 
 |     public InCallService() { | 
 |     } | 
 |  | 
 |     @Override | 
 |     public IBinder onBind(Intent intent) { | 
 |         return new InCallServiceBinder(); | 
 |     } | 
 |  | 
 |     @Override | 
 |     public boolean onUnbind(Intent intent) { | 
 |         if (mPhone != null) { | 
 |             Phone oldPhone = mPhone; | 
 |             mPhone = null; | 
 |  | 
 |             oldPhone.destroy(); | 
 |             // destroy sets all the calls to disconnected if any live ones still exist. Therefore, | 
 |             // it is important to remove the Listener *after* the call to destroy so that | 
 |             // InCallService.on* callbacks are appropriately called. | 
 |             oldPhone.removeListener(mPhoneListener); | 
 |  | 
 |             onPhoneDestroyed(oldPhone); | 
 |         } | 
 |  | 
 |         return false; | 
 |     } | 
 |  | 
 |     /** | 
 |      * Obtain the {@code Phone} associated with this {@code InCallService}. | 
 |      * | 
 |      * @return The {@code Phone} object associated with this {@code InCallService}, or {@code null} | 
 |      *         if the {@code InCallService} is not in a state where it has an associated | 
 |      *         {@code Phone}. | 
 |      * @hide | 
 |      * @deprecated Use direct methods on InCallService instead of {@link Phone}. | 
 |      */ | 
 |     @SystemApi | 
 |     @Deprecated | 
 |     public Phone getPhone() { | 
 |         return mPhone; | 
 |     } | 
 |  | 
 |     /** | 
 |      * Obtains the current list of {@code Call}s to be displayed by this in-call service. | 
 |      * | 
 |      * @return A list of the relevant {@code Call}s. | 
 |      */ | 
 |     public final List<Call> getCalls() { | 
 |         return mPhone == null ? Collections.<Call>emptyList() : mPhone.getCalls(); | 
 |     } | 
 |  | 
 |     /** | 
 |      * Returns if the device can support additional calls. | 
 |      * | 
 |      * @return Whether the phone supports adding more calls. | 
 |      */ | 
 |     public final boolean canAddCall() { | 
 |         return mPhone == null ? false : mPhone.canAddCall(); | 
 |     } | 
 |  | 
 |     /** | 
 |      * Obtains the current phone call audio state. | 
 |      * | 
 |      * @return An object encapsulating the audio state. Returns null if the service is not | 
 |      *         fully initialized. | 
 |      * @deprecated Use {@link #getCallAudioState()} instead. | 
 |      * @hide | 
 |      */ | 
 |     @Deprecated | 
 |     public final AudioState getAudioState() { | 
 |         return mPhone == null ? null : mPhone.getAudioState(); | 
 |     } | 
 |  | 
 |     /** | 
 |      * Obtains the current phone call audio state. | 
 |      * | 
 |      * @return An object encapsulating the audio state. Returns null if the service is not | 
 |      *         fully initialized. | 
 |      * @deprecated Use {@link #getCurrentCallEndpoint()}, | 
 |      * {@link #onAvailableCallEndpointsChanged(List)} and | 
 |      * {@link #onMuteStateChanged(boolean)} instead. | 
 |      */ | 
 |     @Deprecated | 
 |     public final CallAudioState getCallAudioState() { | 
 |         return mPhone == null ? null : mPhone.getCallAudioState(); | 
 |     } | 
 |  | 
 |     /** | 
 |      * Sets the microphone mute state. When this request is honored, there will be change to | 
 |      * the {@link #getCallAudioState()}. | 
 |      * | 
 |      * @param state {@code true} if the microphone should be muted; {@code false} otherwise. | 
 |      */ | 
 |     public final void setMuted(boolean state) { | 
 |         if (mPhone != null) { | 
 |             mPhone.setMuted(state); | 
 |         } | 
 |     } | 
 |  | 
 |     /** | 
 |      * Sets the audio route (speaker, bluetooth, etc...).  When this request is honored, there will | 
 |      * be change to the {@link #getCallAudioState()}. | 
 |      * | 
 |      * @param route The audio route to use. | 
 |      * @deprecated Use {@link #requestCallEndpointChange(CallEndpoint, Executor, OutcomeReceiver)} | 
 |      * instead. | 
 |      */ | 
 |     @Deprecated | 
 |     public final void setAudioRoute(int route) { | 
 |         if (mPhone != null) { | 
 |             mPhone.setAudioRoute(route); | 
 |         } | 
 |     } | 
 |  | 
 |     /** | 
 |      * Request audio routing to a specific bluetooth device. Calling this method may result in | 
 |      * the device routing audio to a different bluetooth device than the one specified if the | 
 |      * bluetooth stack is unable to route audio to the requested device. | 
 |      * A list of available devices can be obtained via | 
 |      * {@link CallAudioState#getSupportedBluetoothDevices()} | 
 |      * | 
 |      * @param bluetoothDevice The bluetooth device to connect to. | 
 |      * @deprecated Use {@link #requestCallEndpointChange(CallEndpoint, Executor, OutcomeReceiver)} | 
 |      * instead. | 
 |      */ | 
 |     @Deprecated | 
 |     public final void requestBluetoothAudio(@NonNull BluetoothDevice bluetoothDevice) { | 
 |         if (mPhone != null) { | 
 |             mPhone.requestBluetoothAudio(bluetoothDevice.getAddress()); | 
 |         } | 
 |     } | 
 |  | 
 |     /** | 
 |      * Request audio routing to a specific CallEndpoint. Clients should not define their own | 
 |      * CallEndpoint when requesting a change. Instead, the new endpoint should be one of the valid | 
 |      * endpoints provided by {@link #onAvailableCallEndpointsChanged(List)}. | 
 |      * When this request is honored, there will be change to the {@link #getCurrentCallEndpoint()}. | 
 |      * | 
 |      * @param endpoint The call endpoint to use. | 
 |      * @param executor The executor of where the callback will execute. | 
 |      * @param callback The callback to notify the result of the endpoint change. | 
 |      */ | 
 |     public final void requestCallEndpointChange(@NonNull CallEndpoint endpoint, | 
 |             @NonNull @CallbackExecutor Executor executor, | 
 |             @NonNull OutcomeReceiver<Void, CallEndpointException> callback) { | 
 |         if (mPhone != null) { | 
 |             mPhone.requestCallEndpointChange(endpoint, executor, callback); | 
 |         } | 
 |     } | 
 |  | 
 |     /** | 
 |      * Obtains the current CallEndpoint. | 
 |      * | 
 |      * @return An object encapsulating the CallEndpoint. | 
 |      */ | 
 |     @NonNull | 
 |     public final CallEndpoint getCurrentCallEndpoint() { | 
 |         return mCallEndpoint; | 
 |     } | 
 |  | 
 |     /** | 
 |      * Invoked when the {@code Phone} has been created. This is a signal to the in-call experience | 
 |      * to start displaying in-call information to the user. Each instance of {@code InCallService} | 
 |      * will have only one {@code Phone}, and this method will be called exactly once in the lifetime | 
 |      * of the {@code InCallService}. | 
 |      * | 
 |      * @param phone The {@code Phone} object associated with this {@code InCallService}. | 
 |      * @hide | 
 |      * @deprecated Use direct methods on InCallService instead of {@link Phone}. | 
 |      */ | 
 |     @SystemApi | 
 |     @Deprecated | 
 |     public void onPhoneCreated(Phone phone) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Invoked when a {@code Phone} has been destroyed. This is a signal to the in-call experience | 
 |      * to stop displaying in-call information to the user. This method will be called exactly once | 
 |      * in the lifetime of the {@code InCallService}, and it will always be called after a previous | 
 |      * call to {@link #onPhoneCreated(Phone)}. | 
 |      * | 
 |      * @param phone The {@code Phone} object associated with this {@code InCallService}. | 
 |      * @hide | 
 |      * @deprecated Use direct methods on InCallService instead of {@link Phone}. | 
 |      */ | 
 |     @SystemApi | 
 |     @Deprecated | 
 |     public void onPhoneDestroyed(Phone phone) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Called when the audio state changes. | 
 |      * | 
 |      * @param audioState The new {@link AudioState}. | 
 |      * @deprecated Use {@link #onCallAudioStateChanged(CallAudioState) instead}. | 
 |      * @hide | 
 |      */ | 
 |     @Deprecated | 
 |     public void onAudioStateChanged(AudioState audioState) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Called when the audio state changes. | 
 |      * | 
 |      * @param audioState The new {@link CallAudioState}. | 
 |      * @deprecated Use {@link #onCallEndpointChanged(CallEndpoint)}, | 
 |      * {@link #onAvailableCallEndpointsChanged(List)} and | 
 |      * {@link #onMuteStateChanged(boolean)} instead. | 
 |      */ | 
 |     @Deprecated | 
 |     public void onCallAudioStateChanged(CallAudioState audioState) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Called when the current CallEndpoint changes. | 
 |      * | 
 |      * @param callEndpoint The current CallEndpoint {@link CallEndpoint}. | 
 |      */ | 
 |     public void onCallEndpointChanged(@NonNull CallEndpoint callEndpoint) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Called when the available CallEndpoint changes. | 
 |      * | 
 |      * @param availableEndpoints The set of available CallEndpoint {@link CallEndpoint}. | 
 |      */ | 
 |     public void onAvailableCallEndpointsChanged(@NonNull List<CallEndpoint> availableEndpoints) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Called when the mute state changes. | 
 |      * | 
 |      * @param isMuted The current mute state. | 
 |      */ | 
 |     public void onMuteStateChanged(boolean isMuted) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Called to bring the in-call screen to the foreground. The in-call experience should | 
 |      * respond immediately by coming to the foreground to inform the user of the state of | 
 |      * ongoing {@code Call}s. | 
 |      * | 
 |      * @param showDialpad If true, put up the dialpad when the screen is shown. | 
 |      */ | 
 |     public void onBringToForeground(boolean showDialpad) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Called when a {@code Call} has been added to this in-call session. The in-call user | 
 |      * experience should add necessary state listeners to the specified {@code Call} and | 
 |      * immediately start to show the user information about the existence | 
 |      * and nature of this {@code Call}. Subsequent invocations of {@link #getCalls()} will | 
 |      * include this {@code Call}. | 
 |      * | 
 |      * @param call A newly added {@code Call}. | 
 |      */ | 
 |     public void onCallAdded(Call call) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Called when a {@code Call} has been removed from this in-call session. The in-call user | 
 |      * experience should remove any state listeners from the specified {@code Call} and | 
 |      * immediately stop displaying any information about this {@code Call}. | 
 |      * Subsequent invocations of {@link #getCalls()} will no longer include this {@code Call}. | 
 |      * | 
 |      * @param call A newly removed {@code Call}. | 
 |      */ | 
 |     public void onCallRemoved(Call call) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Called when the ability to add more calls changes.  If the phone cannot | 
 |      * support more calls then {@code canAddCall} is set to {@code false}.  If it can, then it | 
 |      * is set to {@code true}. This can be used to control the visibility of UI to add more calls. | 
 |      * | 
 |      * @param canAddCall Indicates whether an additional call can be added. | 
 |      */ | 
 |     public void onCanAddCallChanged(boolean canAddCall) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Called to silence the ringer if a ringing call exists. | 
 |      */ | 
 |     public void onSilenceRinger() { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Unused; to handle connection events issued by a {@link ConnectionService}, implement the | 
 |      * {@link android.telecom.Call.Callback#onConnectionEvent(Call, String, Bundle)} callback. | 
 |      * <p> | 
 |      * See {@link Connection#sendConnectionEvent(String, Bundle)}. | 
 |      * | 
 |      * @param call The call the event is associated with. | 
 |      * @param event The event. | 
 |      * @param extras Any associated extras. | 
 |      */ | 
 |     public void onConnectionEvent(Call call, String event, Bundle extras) { | 
 |     } | 
 |  | 
 |     /** | 
 |      * Used to issue commands to the {@link Connection.VideoProvider} associated with a | 
 |      * {@link Call}. | 
 |      */ | 
 |     public static abstract class VideoCall { | 
 |  | 
 |         /** @hide */ | 
 |         @SuppressWarnings("HiddenAbstractMethod") | 
 |         public abstract void destroy(); | 
 |  | 
 |         /** | 
 |          * Registers a callback to receive commands and state changes for video calls. | 
 |          * | 
 |          * @param callback The video call callback. | 
 |          */ | 
 |         public abstract void registerCallback(VideoCall.Callback callback); | 
 |  | 
 |         /** | 
 |          * Registers a callback to receive commands and state changes for video calls. | 
 |          * | 
 |          * @param callback The video call callback. | 
 |          * @param handler A handler which commands and status changes will be delivered to. | 
 |          */ | 
 |         public abstract void registerCallback(VideoCall.Callback callback, Handler handler); | 
 |  | 
 |         /** | 
 |          * Clears the video call callback set via {@link #registerCallback}. | 
 |          * | 
 |          * @param callback The video call callback to clear. | 
 |          */ | 
 |         public abstract void unregisterCallback(VideoCall.Callback callback); | 
 |  | 
 |         /** | 
 |          * Sets the camera to be used for the outgoing video. | 
 |          * <p> | 
 |          * Handled by {@link Connection.VideoProvider#onSetCamera(String)}. | 
 |          * | 
 |          * @param cameraId The id of the camera (use ids as reported by | 
 |          * {@link CameraManager#getCameraIdList()}). | 
 |          */ | 
 |         public abstract void setCamera(String cameraId); | 
 |  | 
 |         /** | 
 |          * Sets the surface to be used for displaying a preview of what the user's camera is | 
 |          * currently capturing.  When video transmission is enabled, this is the video signal which | 
 |          * is sent to the remote device. | 
 |          * <p> | 
 |          * Handled by {@link Connection.VideoProvider#onSetPreviewSurface(Surface)}. | 
 |          * | 
 |          * @param surface The {@link Surface}. | 
 |          */ | 
 |         public abstract void setPreviewSurface(Surface surface); | 
 |  | 
 |         /** | 
 |          * Sets the surface to be used for displaying the video received from the remote device. | 
 |          * <p> | 
 |          * Handled by {@link Connection.VideoProvider#onSetDisplaySurface(Surface)}. | 
 |          * | 
 |          * @param surface The {@link Surface}. | 
 |          */ | 
 |         public abstract void setDisplaySurface(Surface surface); | 
 |  | 
 |         /** | 
 |          * Sets the device orientation, in degrees.  Assumes that a standard portrait orientation of | 
 |          * the device is 0 degrees. | 
 |          * <p> | 
 |          * Handled by {@link Connection.VideoProvider#onSetDeviceOrientation(int)}. | 
 |          * | 
 |          * @param rotation The device orientation, in degrees. | 
 |          */ | 
 |         public abstract void setDeviceOrientation(int rotation); | 
 |  | 
 |         /** | 
 |          * Sets the camera zoom ratio. | 
 |          * <p> | 
 |          * Handled by {@link Connection.VideoProvider#onSetZoom(float)}. | 
 |          * | 
 |          * @param value The camera zoom ratio; for the current camera, should be a value in the | 
 |          * range defined by | 
 |          * {@link android.hardware.camera2.CameraCharacteristics#CONTROL_ZOOM_RATIO_RANGE}. | 
 |          */ | 
 |         public abstract void setZoom(float value); | 
 |  | 
 |         /** | 
 |          * Issues a request to modify the properties of the current video session. | 
 |          * <p> | 
 |          * Example scenarios include: requesting an audio-only call to be upgraded to a | 
 |          * bi-directional video call, turning on or off the user's camera, sending a pause signal | 
 |          * when the {@link InCallService} is no longer the foreground application. | 
 |          * <p> | 
 |          * Handled by | 
 |          * {@link Connection.VideoProvider#onSendSessionModifyRequest(VideoProfile, VideoProfile)}. | 
 |          * | 
 |          * @param requestProfile The requested call video properties. | 
 |          */ | 
 |         public abstract void sendSessionModifyRequest(VideoProfile requestProfile); | 
 |  | 
 |         /** | 
 |          * Provides a response to a request to change the current call video session | 
 |          * properties.  This should be called in response to a request the {@link InCallService} has | 
 |          * received via {@link VideoCall.Callback#onSessionModifyRequestReceived}. | 
 |          * <p> | 
 |          * Handled by | 
 |          * {@link Connection.VideoProvider#onSendSessionModifyResponse(VideoProfile)}. | 
 |          * | 
 |          * @param responseProfile The response call video properties. | 
 |          */ | 
 |         public abstract void sendSessionModifyResponse(VideoProfile responseProfile); | 
 |  | 
 |         /** | 
 |          * Issues a request to the {@link Connection.VideoProvider} to retrieve the capabilities | 
 |          * of the current camera.  The current camera is selected using | 
 |          * {@link VideoCall#setCamera(String)}. | 
 |          * <p> | 
 |          * Camera capabilities are reported to the caller via | 
 |          * {@link VideoCall.Callback#onCameraCapabilitiesChanged(VideoProfile.CameraCapabilities)}. | 
 |          * <p> | 
 |          * Handled by {@link Connection.VideoProvider#onRequestCameraCapabilities()}. | 
 |          */ | 
 |         public abstract void requestCameraCapabilities(); | 
 |  | 
 |         /** | 
 |          * Issues a request to the {@link Connection.VideoProvider} to retrieve the cumulative data | 
 |          * usage for the video component of the current call (in bytes).  Data usage is reported | 
 |          * to the caller via {@link VideoCall.Callback#onCallDataUsageChanged}. | 
 |          * <p> | 
 |          * Handled by {@link Connection.VideoProvider#onRequestConnectionDataUsage()}. | 
 |          */ | 
 |         public abstract void requestCallDataUsage(); | 
 |  | 
 |         /** | 
 |          * Provides the {@link Connection.VideoProvider} with the {@link Uri} of an image to be | 
 |          * displayed to the peer device when the video signal is paused. | 
 |          * <p> | 
 |          * Handled by {@link Connection.VideoProvider#onSetPauseImage(Uri)}. | 
 |          * | 
 |          * @param uri URI of image to display. | 
 |          */ | 
 |         public abstract void setPauseImage(Uri uri); | 
 |  | 
 |         /** | 
 |          * The {@link InCallService} extends this class to provide a means of receiving callbacks | 
 |          * from the {@link Connection.VideoProvider}. | 
 |          * <p> | 
 |          * When the {@link InCallService} receives the | 
 |          * {@link Call.Callback#onVideoCallChanged(Call, VideoCall)} callback, it should create an | 
 |          * instance its {@link VideoCall.Callback} implementation and set it on the | 
 |          * {@link VideoCall} using {@link VideoCall#registerCallback(Callback)}. | 
 |          */ | 
 |         public static abstract class Callback { | 
 |             /** | 
 |              * Called when the {@link Connection.VideoProvider} receives a session modification | 
 |              * request from the peer device. | 
 |              * <p> | 
 |              * The {@link InCallService} may potentially prompt the user to confirm whether they | 
 |              * wish to accept the request, or decide to automatically accept the request.  In either | 
 |              * case the {@link InCallService} should call | 
 |              * {@link VideoCall#sendSessionModifyResponse(VideoProfile)} to indicate the video | 
 |              * profile agreed upon. | 
 |              * <p> | 
 |              * Callback originates from | 
 |              * {@link Connection.VideoProvider#receiveSessionModifyRequest(VideoProfile)}. | 
 |              * | 
 |              * @param videoProfile The requested video profile. | 
 |              */ | 
 |             public abstract void onSessionModifyRequestReceived(VideoProfile videoProfile); | 
 |  | 
 |             /** | 
 |              * Called when the {@link Connection.VideoProvider} receives a response to a session | 
 |              * modification request previously sent to the peer device. | 
 |              * <p> | 
 |              * The new video state should not be considered active by the {@link InCallService} | 
 |              * until the {@link Call} video state changes (the | 
 |              * {@link Call.Callback#onDetailsChanged(Call, Call.Details)} callback is triggered | 
 |              * when the video state changes). | 
 |              * <p> | 
 |              * Callback originates from | 
 |              * {@link Connection.VideoProvider#receiveSessionModifyResponse(int, VideoProfile, | 
 |              *      VideoProfile)}. | 
 |              * | 
 |              * @param status Status of the session modify request.  Valid values are | 
 |              *      {@link Connection.VideoProvider#SESSION_MODIFY_REQUEST_SUCCESS}, | 
 |              *      {@link Connection.VideoProvider#SESSION_MODIFY_REQUEST_FAIL}, | 
 |              *      {@link Connection.VideoProvider#SESSION_MODIFY_REQUEST_INVALID}, | 
 |              *      {@link Connection.VideoProvider#SESSION_MODIFY_REQUEST_TIMED_OUT}, | 
 |              *      {@link Connection.VideoProvider#SESSION_MODIFY_REQUEST_REJECTED_BY_REMOTE}. | 
 |              * @param requestedProfile The original request which was sent to the peer device. | 
 |              * @param responseProfile The actual profile changes made by the peer device. | 
 |              */ | 
 |             public abstract void onSessionModifyResponseReceived(int status, | 
 |                     VideoProfile requestedProfile, VideoProfile responseProfile); | 
 |  | 
 |             /** | 
 |              * Handles events related to the current video session which the {@link InCallService} | 
 |              * may wish to handle. These are separate from requested changes to the session due to | 
 |              * the underlying protocol or connection. | 
 |              * <p> | 
 |              * Callback originates from | 
 |              * {@link Connection.VideoProvider#handleCallSessionEvent(int)}. | 
 |              * | 
 |              * @param event The event.  Valid values are: | 
 |              *      {@link Connection.VideoProvider#SESSION_EVENT_RX_PAUSE}, | 
 |              *      {@link Connection.VideoProvider#SESSION_EVENT_RX_RESUME}, | 
 |              *      {@link Connection.VideoProvider#SESSION_EVENT_TX_START}, | 
 |              *      {@link Connection.VideoProvider#SESSION_EVENT_TX_STOP}, | 
 |              *      {@link Connection.VideoProvider#SESSION_EVENT_CAMERA_FAILURE}, | 
 |              *      {@link Connection.VideoProvider#SESSION_EVENT_CAMERA_READY}, | 
 |              *      {@link Connection.VideoProvider#SESSION_EVENT_CAMERA_PERMISSION_ERROR}. | 
 |              */ | 
 |             public abstract void onCallSessionEvent(int event); | 
 |  | 
 |             /** | 
 |              * Handles a change to the video dimensions from the peer device. This could happen if, | 
 |              * for example, the peer changes orientation of their device, or switches cameras. | 
 |              * <p> | 
 |              * Callback originates from | 
 |              * {@link Connection.VideoProvider#changePeerDimensions(int, int)}. | 
 |              * | 
 |              * @param width  The updated peer video width. | 
 |              * @param height The updated peer video height. | 
 |              */ | 
 |             public abstract void onPeerDimensionsChanged(int width, int height); | 
 |  | 
 |             /** | 
 |              * Handles a change to the video quality. | 
 |              * <p> | 
 |              * Callback originates from {@link Connection.VideoProvider#changeVideoQuality(int)}. | 
 |              * | 
 |              * @param videoQuality  The updated peer video quality.  Valid values: | 
 |              *      {@link VideoProfile#QUALITY_HIGH}, | 
 |              *      {@link VideoProfile#QUALITY_MEDIUM}, | 
 |              *      {@link VideoProfile#QUALITY_LOW}, | 
 |              *      {@link VideoProfile#QUALITY_DEFAULT}. | 
 |              */ | 
 |             public abstract void onVideoQualityChanged(int videoQuality); | 
 |  | 
 |             /** | 
 |              * Handles an update to the total data used for the current video session. | 
 |              * <p> | 
 |              * Used by the {@link Connection.VideoProvider} in response to | 
 |              * {@link VideoCall#requestCallDataUsage()}.  May also be called periodically by the | 
 |              * {@link Connection.VideoProvider}. | 
 |              * <p> | 
 |              * Callback originates from {@link Connection.VideoProvider#setCallDataUsage(long)}. | 
 |              * | 
 |              * @param dataUsage The updated data usage (in bytes). | 
 |              */ | 
 |             public abstract void onCallDataUsageChanged(long dataUsage); | 
 |  | 
 |             /** | 
 |              * Handles a change in the capabilities of the currently selected camera. | 
 |              * <p> | 
 |              * Used by the {@link Connection.VideoProvider} in response to | 
 |              * {@link VideoCall#requestCameraCapabilities()}.  The {@link Connection.VideoProvider} | 
 |              * may also report the camera capabilities after a call to | 
 |              * {@link VideoCall#setCamera(String)}. | 
 |              * <p> | 
 |              * Callback originates from | 
 |              * {@link Connection.VideoProvider#changeCameraCapabilities( | 
 |              *      VideoProfile.CameraCapabilities)}. | 
 |              * | 
 |              * @param cameraCapabilities The changed camera capabilities. | 
 |              */ | 
 |             public abstract void onCameraCapabilitiesChanged( | 
 |                     VideoProfile.CameraCapabilities cameraCapabilities); | 
 |         } | 
 |     } | 
 | } |