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 17 package android.service.voice; 18 19 import android.app.Service; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.content.res.Configuration; 23 import android.os.Bundle; 24 import android.os.IBinder; 25 import android.os.Looper; 26 import android.os.Message; 27 import android.os.RemoteException; 28 import android.os.ServiceManager; 29 import com.android.internal.app.IVoiceInteractionManagerService; 30 import com.android.internal.os.HandlerCaller; 31 import com.android.internal.os.SomeArgs; 32 33 import java.io.FileDescriptor; 34 import java.io.PrintWriter; 35 36 /** 37 * An active voice interaction session, initiated by a {@link VoiceInteractionService}. 38 */ 39 public abstract class VoiceInteractionSessionService extends Service { 40 41 static final int MSG_NEW_SESSION = 1; 42 43 IVoiceInteractionManagerService mSystemService; 44 VoiceInteractionSession mSession; 45 46 IVoiceInteractionSessionService mInterface = new IVoiceInteractionSessionService.Stub() { 47 public void newSession(IBinder token, Bundle args, int startFlags) { 48 mHandlerCaller.sendMessage(mHandlerCaller.obtainMessageIOO(MSG_NEW_SESSION, 49 startFlags, token, args)); 50 51 } 52 }; 53 54 HandlerCaller mHandlerCaller; 55 final HandlerCaller.Callback mHandlerCallerCallback = new HandlerCaller.Callback() { 56 @Override 57 public void executeMessage(Message msg) { 58 SomeArgs args = (SomeArgs)msg.obj; 59 switch (msg.what) { 60 case MSG_NEW_SESSION: 61 doNewSession((IBinder)args.arg1, (Bundle)args.arg2, args.argi1); 62 break; 63 } 64 } 65 }; 66 67 @Override onCreate()68 public void onCreate() { 69 super.onCreate(); 70 mSystemService = IVoiceInteractionManagerService.Stub.asInterface( 71 ServiceManager.getService(Context.VOICE_INTERACTION_MANAGER_SERVICE)); 72 mHandlerCaller = new HandlerCaller(this, Looper.myLooper(), 73 mHandlerCallerCallback, true); 74 } 75 onNewSession(Bundle args)76 public abstract VoiceInteractionSession onNewSession(Bundle args); 77 78 @Override onBind(Intent intent)79 public IBinder onBind(Intent intent) { 80 return mInterface.asBinder(); 81 } 82 83 @Override onConfigurationChanged(Configuration newConfig)84 public void onConfigurationChanged(Configuration newConfig) { 85 super.onConfigurationChanged(newConfig); 86 if (mSession != null) { 87 mSession.onConfigurationChanged(newConfig); 88 } 89 } 90 91 @Override onLowMemory()92 public void onLowMemory() { 93 super.onLowMemory(); 94 if (mSession != null) { 95 mSession.onLowMemory(); 96 } 97 } 98 99 @Override onTrimMemory(int level)100 public void onTrimMemory(int level) { 101 super.onTrimMemory(level); 102 if (mSession != null) { 103 mSession.onTrimMemory(level); 104 } 105 } 106 107 @Override dump(FileDescriptor fd, PrintWriter writer, String[] args)108 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 109 if (mSession == null) { 110 writer.println("(no active session)"); 111 } else { 112 writer.println("VoiceInteractionSession:"); 113 mSession.dump(" ", fd, writer, args); 114 } 115 } 116 doNewSession(IBinder token, Bundle args, int startFlags)117 void doNewSession(IBinder token, Bundle args, int startFlags) { 118 if (mSession != null) { 119 mSession.doDestroy(); 120 mSession = null; 121 } 122 mSession = onNewSession(args); 123 try { 124 mSystemService.deliverNewSession(token, mSession.mSession, mSession.mInteractor); 125 mSession.doCreate(mSystemService, token); 126 } catch (RemoteException e) { 127 } 128 } 129 } 130