无法将 BroadcastReceiver 与 LocalBroadcastManager 一起使用

Question

我有 1 activity 和 1 服务。服务将在 activity 进入后台时启动，并在 [=36= 时停止] 进入前台。当服务停止时，我想按意图将一个对象从它发送到 activity。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);
}

这里的问题是，当我的 activity 出现在前台时，我在 MyActivity 中的 broadcastReceiver 无法接收到来自服务的 intent。不知道为什么。

谢谢。

Answer 1

您应该考虑将您的 broadcastReceiver 注销到 onDestory() 而不是 onStop()

因为当 activity 进入后台时您的 brodcastReceiver 正在取消注册。

更多信息请查看HERE

无法将 BroadcastReceiver 与 LocalBroadcastManager 一起使用

Cannot using BroadcastReceiver with LocalBroadcastManager

android

intentfilter

broadcastreceiver

intentservice

localbroadcastmanager