永远不会调用Android服务的onTaskRemoved!为什么？

Question

我在最近2天遇到了一个问题,我想点击api并向用户显示Toast当用户从后台任务中刷掉应用程序时,我发现从应用程序从后台删除时service可能会出现这种情况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: ");
}
}

在Manifest我添加了这个:

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

并service在SplashScreen中启动:

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

服务启动良好但从onTaskRemoved我从后台删除应用程序时从未调用过.为什么？我做错了什么？

注意:

有趣的结果是我能够在某些设备中获得Toast但在大多数设备中都没有,并且所有设备都有OS-Android 5.0

Answer 1

试试这个

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

只需替换Service.START_STICKY;为START_STICKY;

一旦应用程序从最近的应用程序列表中删除/清除，您就可以调用onTaskRemoved(Intent rootIntent)。