Question

我有 1活动和 1服务。当活动进入后台时，将启动服务，当活动进入前台时，服务将停止。当服务停止时，我想通过意图将对象从它发送到活动。这是我的代码

MyActivity.java

private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(ACTION_WITH_RLM)) {                
        //I will get the object received by service here 
        }
    }
};

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_record_lesson_ins);

    localBroadcastManager = LocalBroadcastManager.getInstance(this);
    IntentFilter intentFilter = new IntentFilter();
    intentFilter.addAction(ACTION_WITH_RLM);
    localBroadcastManager.registerReceiver(broadcastReceiver, intentFilter);
}

@Override
protected void onResume() {
    super.onResume();
    if (intent != null) {
        stopService(intent);
    }
}

@Override
protected void onPause() {
    super.onPause();
    if (intent != null) {
        startService(intent);
    }
}

@Override
protected void onStop() {
    super.onStop();
    localBroadcastManager.unregisterReceiver(broadcastReceiver);
}

MyService.java

private RecordLessonModel recordLessonModel;

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

@Override
public void onCreate() {
    super.onCreate();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    //I code sth for handle recordLessonModel object
    return START_STICKY;
}

@Override
public void onDestroy() {
    super.onDestroy();
    Intent intent = new Intent(MyActivity.ACTION_WITH_RLM);
    intent.putExtra(MyActivity.RECORD_MODEL_NAME, Parcels.wrap(recordLessonModel));
    LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}

此处的问题是我的broadcastReceiver MyActivity在活动到达前台时无法接收服务意图。我不知道为什么。

感谢。

Answer 1

您应该考虑将您的broadcastReceiver取消注册到onDestory()而不是onStop()

因为你的brodcastReceiver在活动变为背景时未注册。

有关HERE

的更多信息，请参阅

无法将BroadcastReceiver与LocalBroadcastManager一起使用

1 个答案: