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/**
* Copyright (C) 2014 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.service.voice;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.os.DeadObjectException;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.util.Log;
import com.android.internal.app.IVoiceInteractionManagerService;
import com.android.internal.os.HandlerCaller;
import com.android.internal.os.SomeArgs;
import java.io.FileDescriptor;
import java.io.PrintWriter;
/**
* An active voice interaction session, initiated by a {@link VoiceInteractionService}.
*/
public abstract class VoiceInteractionSessionService extends Service {
private static final String TAG = "VoiceInteractionSession";
static final int MSG_NEW_SESSION = 1;
IVoiceInteractionManagerService mSystemService;
VoiceInteractionSession mSession;
IVoiceInteractionSessionService mInterface = new IVoiceInteractionSessionService.Stub() {
public void newSession(IBinder token, Bundle args, int startFlags) {
mHandlerCaller.sendMessage(mHandlerCaller.obtainMessageIOO(MSG_NEW_SESSION,
startFlags, token, args));
}
};
HandlerCaller mHandlerCaller;
final HandlerCaller.Callback mHandlerCallerCallback = new HandlerCaller.Callback() {
@Override
public void executeMessage(Message msg) {
SomeArgs args = (SomeArgs)msg.obj;
switch (msg.what) {
case MSG_NEW_SESSION:
doNewSession((IBinder)args.arg1, (Bundle)args.arg2, args.argi1);
break;
}
}
};
@Override
public void onCreate() {
super.onCreate();
mSystemService = IVoiceInteractionManagerService.Stub.asInterface(
ServiceManager.getService(Context.VOICE_INTERACTION_MANAGER_SERVICE));
mHandlerCaller = new HandlerCaller(this, Looper.myLooper(),
mHandlerCallerCallback, true);
}
public abstract VoiceInteractionSession onNewSession(Bundle args);
@Override
public IBinder onBind(Intent intent) {
return mInterface.asBinder();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
if (mSession != null) {
mSession.onConfigurationChanged(newConfig);
}
}
@Override
public void onLowMemory() {
super.onLowMemory();
if (mSession != null) {
mSession.onLowMemory();
}
}
@Override
public void onTrimMemory(int level) {
super.onTrimMemory(level);
if (mSession != null) {
mSession.onTrimMemory(level);
}
}
@Override
protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
if (mSession == null) {
writer.println("(no active session)");
} else {
writer.println("VoiceInteractionSession:");
mSession.dump(" ", fd, writer, args);
}
}
void doNewSession(IBinder token, Bundle args, int startFlags) {
if (mSession != null) {
mSession.doDestroy();
mSession = null;
}
mSession = onNewSession(args);
if (deliverSession(token)) {
mSession.doCreate(mSystemService, token);
} else {
// TODO(b/178777121): Add an onError() method to let the application know what happened.
mSession.doDestroy();
mSession = null;
}
}
private boolean deliverSession(IBinder token) {
try {
return mSystemService.deliverNewSession(token, mSession.mSession, mSession.mInteractor);
} catch (DeadObjectException ignored) {
} catch (RemoteException e) {
Log.e(TAG, "Failed to deliver session: " + e);
}
return false;
}
}
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