永远不会调用Android服务的onTaskRemoved!为什么?

时间:2016-10-13 12:39:43

标签: android android-service

过去2天我遇到了问题,我想点击api并在用户从背景任务中轻扫时向用户显示Toast,我发现从service开始,当应用从后台删除时,可能会调用onTaskRemoved

代码:

MyService.java

public class MyService extends Service {

private static final String TAG = MyService.class.getSimpleName();
Handler mHandler;

@Override
public void onCreate() {
    super.onCreate();
    mHandler = new Handler();
}

@Nullable
@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    Log.d(TAG, "onStartCommand: ");
    mHandler.post(new Runnable() {
        @Override
        public void run() {
            new ToastPoP(MyService.this).showLongToast("Service started");
        }
    });

    return Service.START_STICKY;
}

@Override
public void onTaskRemoved(Intent rootIntent) {
    super.onTaskRemoved(rootIntent);
    Log.d(TAG, "onTaskRemoved: ");
    mHandler.post(new Runnable() {
        @Override
        public void run() {
            Toast.makeText(App.getInstance(), "Removed", Toast.LENGTH_SHORT).show();
            // api call too
        }

    });
    // for kitket
    Intent restartService = new Intent(getApplicationContext(),
            this.getClass());
    restartService.setPackage(getPackageName());
    PendingIntent restartServicePI = PendingIntent.getService(
            getApplicationContext(), 1, restartService,
            PendingIntent.FLAG_ONE_SHOT);
    AlarmManager alarmService = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
    alarmService.set(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + 1000, restartServicePI);

}

@Override
public void onDestroy() {
    super.onDestroy();
    Log.d(TAG, "onDestroy: ");
}
}

并在Manifest我添加了这个:

 <service
        android:name=".MyService"
        android:stopWithTask="false"
        >
    </service>

并在SplashScreen中启动service

 Intent i = new Intent(this, MyService.class);
    this.startService(i);

服务启动良好,但是当我从后台删除应用时,永远不会调用onTaskRemoved。为什么?我做错了什么?

注意:

有趣的结果是,我可以在某些设备上获得Toast,但在大多数设备中都没有,而且所有设备都有OS-Android 5.0

1 个答案:

答案 0 :(得分:-3)

试试这个

<service
            android:name=".MyService"
            android:enabled="true"
            android:stopWithTask="false" />

只需将Service.START_STICKY;替换为START_STICKY;

即可

一旦从最近的应用列表中删除/清除应用,您就可以致电onTaskRemoved(Intent rootIntent)