VoiceInteractionSessionService.java revision 593334ab70a8341c7d24d71a377ab5617e3f4ab7
1/** 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package android.service.voice; 18 19import android.app.Service; 20import android.content.Context; 21import android.content.Intent; 22import android.content.res.Configuration; 23import android.os.Bundle; 24import android.os.IBinder; 25import android.os.Looper; 26import android.os.Message; 27import android.os.RemoteException; 28import android.os.ServiceManager; 29import com.android.internal.app.IVoiceInteractionManagerService; 30import com.android.internal.os.HandlerCaller; 31import com.android.internal.os.SomeArgs; 32 33/** 34 * An active voice interaction session, initiated by a {@link VoiceInteractionService}. 35 */ 36public abstract class VoiceInteractionSessionService extends Service { 37 38 static final int MSG_NEW_SESSION = 1; 39 40 IVoiceInteractionManagerService mSystemService; 41 VoiceInteractionSession mSession; 42 43 IVoiceInteractionSessionService mInterface = new IVoiceInteractionSessionService.Stub() { 44 public void newSession(IBinder token, Bundle args, int startFlags) { 45 mHandlerCaller.sendMessage(mHandlerCaller.obtainMessageIOO(MSG_NEW_SESSION, 46 startFlags, token, args)); 47 48 } 49 }; 50 51 HandlerCaller mHandlerCaller; 52 final HandlerCaller.Callback mHandlerCallerCallback = new HandlerCaller.Callback() { 53 @Override 54 public void executeMessage(Message msg) { 55 SomeArgs args = (SomeArgs)msg.obj; 56 switch (msg.what) { 57 case MSG_NEW_SESSION: 58 doNewSession((IBinder)args.arg1, (Bundle)args.arg2, args.argi1); 59 break; 60 } 61 } 62 }; 63 64 @Override 65 public void onCreate() { 66 super.onCreate(); 67 mSystemService = IVoiceInteractionManagerService.Stub.asInterface( 68 ServiceManager.getService(Context.VOICE_INTERACTION_MANAGER_SERVICE)); 69 mHandlerCaller = new HandlerCaller(this, Looper.myLooper(), 70 mHandlerCallerCallback, true); 71 } 72 73 public abstract VoiceInteractionSession onNewSession(Bundle args); 74 75 @Override 76 public IBinder onBind(Intent intent) { 77 return mInterface.asBinder(); 78 } 79 80 @Override 81 public void onConfigurationChanged(Configuration newConfig) { 82 super.onConfigurationChanged(newConfig); 83 if (mSession != null) { 84 mSession.onConfigurationChanged(newConfig); 85 } 86 } 87 88 @Override 89 public void onLowMemory() { 90 super.onLowMemory(); 91 if (mSession != null) { 92 mSession.onLowMemory(); 93 } 94 } 95 96 @Override 97 public void onTrimMemory(int level) { 98 super.onTrimMemory(level); 99 if (mSession != null) { 100 mSession.onTrimMemory(level); 101 } 102 } 103 104 void doNewSession(IBinder token, Bundle args, int startFlags) { 105 if (mSession != null) { 106 mSession.doDestroy(); 107 mSession = null; 108 } 109 mSession = onNewSession(args); 110 try { 111 mSystemService.deliverNewSession(token, mSession.mSession, mSession.mInteractor); 112 mSession.doCreate(mSystemService, token); 113 } catch (RemoteException e) { 114 } 115 } 116} 117