LocalBroadcastManager 不工作

Question

我正在尝试从服务向 activity 发送消息，但由于某种原因它无法正常工作。

Activity

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_barcode);
   LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
                new IntentFilter("custom-event-name"));


private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            // Get extra data included in the Intent
            Boolean state = intent.getBooleanExtra("state",false);
            if(state){
                Toast.makeText(getApplicationContext(),"Данные успешно отправлены",Toast.LENGTH_SHORT).show();
            }
        }
    };

    @Override
    protected void onDestroy() {
        // Unregister since the activity is about to be closed.
        LocalBroadcastManager.getInstance(this).unregisterReceiver(mMessageReceiver);
        super.onDestroy();
    }

服务

   private void sendMessage(boolean state) {
        Log.d("sender", "Broadcasting message");
        Intent intent = new Intent("custom-event-name");
        // You can also include some extra data.
        intent.putExtra("state", state);
        LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
    }

显示

Log.d "broadcasting message" 然后什么也没有发生

问题已解决

在 android 清单中

<service
    android:name=".service.TerminalService"
    android:process=":update_service" >
</service>

似乎在指定 android:process 时 localbroadcastmanager 不工作。我刚刚删除了 android:process 行并且有效

Answer 1

您的代码没有问题。仅更新您的接收方法 else 子句

  private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                // Get extra data included in the Intent
                Boolean state = intent.getBooleanExtra("state",false);
                if(state){
                 Toast.makeText(getApplicationContext(),"Данные успешно отправлены",Toast.LENGTH_SHORT).show();
             }
             else {
                 Toast.makeText(getApplicationContext(),"else message ",Toast.LENGTH_SHORT).show();

             }
            }
        };

Answer 2

com.android.support:localbroadcastmanager -> 更改 androidx.localbroadcastmanager:localbroadcastmanager:1.0.0

LocalBroadcastManager 不工作

LocalBroadcastManager not working

android

localbroadcastmanager