VoiceInteractionSessionService.java revision c03c9167c2d9a1e22fb2b176b00a0524177fb037 
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.os.Bundle;
23import android.os.IBinder;
24import android.os.Looper;
25import android.os.Message;
26import android.os.RemoteException;
27import android.os.ServiceManager;
28import com.android.internal.app.IVoiceInteractionManagerService;
29import com.android.internal.os.HandlerCaller;
30import com.android.internal.os.SomeArgs;
31
32/**
33 * An active voice interaction session, initiated by a {@link VoiceInteractionService}.
34 */
35public abstract class VoiceInteractionSessionService extends Service {
36
37    static final int MSG_NEW_SESSION = 1;
38
39    IVoiceInteractionManagerService mSystemService;
40    VoiceInteractionSession mSession;
41
42    IVoiceInteractionSessionService mInterface = new IVoiceInteractionSessionService.Stub() {
43        public void newSession(IBinder token, Bundle args) {
44            mHandlerCaller.sendMessage(mHandlerCaller.obtainMessageOO(MSG_NEW_SESSION,
45                    token, args));
46
47        }
48    };
49
50    HandlerCaller mHandlerCaller;
51    final HandlerCaller.Callback mHandlerCallerCallback = new HandlerCaller.Callback() {
52        @Override
53        public void executeMessage(Message msg) {
54            SomeArgs args = (SomeArgs)msg.obj;
55            switch (msg.what) {
56                case MSG_NEW_SESSION:
57                    doNewSession((IBinder)args.arg1, (Bundle)args.arg2);
58                    break;
59            }
60        }
61    };
62
63    @Override
64    public void onCreate() {
65        super.onCreate();
66        mSystemService = IVoiceInteractionManagerService.Stub.asInterface(
67                ServiceManager.getService(Context.VOICE_INTERACTION_MANAGER_SERVICE));
68        mHandlerCaller = new HandlerCaller(this, Looper.myLooper(),
69                mHandlerCallerCallback, true);
70    }
71
72    public abstract VoiceInteractionSession onNewSession(Bundle args);
73
74    @Override
75    public IBinder onBind(Intent intent) {
76        return mInterface.asBinder();
77    }
78
79    void doNewSession(IBinder token, Bundle args) {
80        if (mSession != null) {
81            mSession.doDestroy();
82            mSession = null;
83        }
84        mSession = onNewSession(args);
85        try {
86            mSystemService.deliverNewSession(token, mSession.mSession, mSession.mInteractor);
87            mSession.doCreate(mSystemService, token, args);
88        } catch (RemoteException e) {
89        }
90    }
91}
92