某些设备中的Android复制服务

我正在开发一个简单的计时器应用程序,它使用服务(这是为了让计时器保持运行,即使应用程序已经关闭)。

计时器逻辑由服务处理,我的Fragment只是绑定到服务来获取数据。我的问题是,当我启动计时器并关闭应用程序时。当我再次打开它时,计时器绑定到服务的新实例,因此它认为它没有运行。

这只发生在我测试的一个设备中(在模拟器中,其他4个设备工作正常)。这到底是怎么回事??

以下是一些代码:

碎片 onStart :

public void onStart() {
    super.onStart();
    Intent intent = createServiceIntent();
    getActivity().startService(intent);
    getActivity()
        .bindService(
            intent,
            mServiceConnection,
            Context.BIND_ABOVE_CLIENT
        );

}

服务构造函数, onCreate , 启动时 , onBind 和 onUnbind

public ChronometerService() {
    Log.d(Config.APP_TAG, "CREATING CHRONOMETER SERVICE INSTANCE");
}

@Override
public void onCreate()
{
    super.onCreate();
    this.mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    this.mBinder = new ChronometerBinder();
    this.mPauses = new LinkedList<>();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId){
    return START_STICKY;
}

@Override
public IBinder onBind(Intent intent) {
    Log.d(Config.APP_TAG, "SERVICE BIND. AND WAS" + (mRunning ? "" : "N'T") + " RUNNING");
    if( ! mRunning ) {
        this.mPauseLength = 0;
        this.mStoppedAt = 0;
        this.mBase = 0;
    }
    return mBinder;
}

@Override
public boolean onUnbind(Intent intent) {
    if( ! mRunning) {
        stopForeground(true);
        stopSelf();
    }
    return true;
}

当点击片段中的启动按钮时,将调用服务中的以下方法:

public void start() {
    if(this.mBase == 0) {
        reset();
        this.mBase = now();
    }else{
        mPauseLength += now() - mStoppedAt;
    }
    Intent i = new Intent(this, MainActivity.class);
    i.putExtra(MainActivity.CURRENT_FRAGMENT, MainActivity.CHRONOMETER_TAG);
    PendingIntent intent = PendingIntent.getActivity(this, SERVICE_ID, i, PendingIntent.FLAG_UPDATE_CURRENT);

    mNotificationBuilder = new NotificationCompat.Builder(this);
    mNotificationBuilder.setContentTitle(getResources().getString(R.string.chronometer_title))
        .setSmallIcon(R.drawable.ic_timer_white_48dp)
        .setContentIntent(intent);

    Notification n = mNotificationBuilder.build();
    startForeground(SERVICE_ID, n);
    mRunning = true;
    update();
}

在应用程序运行正常的设备中,在日志中我得到:

CREATING CHRONOMETER SERVICE INSTANCE
SERVICE BIND. AND WASN'T RUNNING
(Closing the app)
SERVICE BIND. AND WAS RUNNING

在设备中它不起作用,我得到:

CREATING CHRONOMETER SERVICE INSTANCE
SERVICE BIND. AND WASN'T RUNNING
(Closing the app)
CREATING CHRONOMETER SERVICE INSTANCE
SERVICE BIND. AND WASN'T RUNNING

希望你能帮助我。