0

将包从服务传递到接收器返回 null

我想将数据包从服务传递到接收器以立即更改 ui 数据

我已将数据包作为哈希映射键传递并在活动类中获得相同但总是为空我只是在代码中注册 registerReceiver 而不是在清单中

主要活动 

BroadcastReceiver receiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            try {
                if (intent != null) {

                    Bundle extras = intent.getBundleExtra("hashmap");
                    Toast.makeText(context, extras + "  " + intent.getBundleExtra("hashmap"), Toast.LENGTH_SHORT).show();


                }

            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    };


    @Override

    protected void onResume() {
        super.onResume();
        try {
            LocalBroadcastManager.getInstance(this).registerReceiver(receiver, new IntentFilter(FIRMessagingService.REQUEST_ACCEPT));
        } catch (Exception e) {
            e.printStackTrace();

        }
       /* try {
            registerReceiver(receiver, new IntentFilter(FCMActivity.NEW_NOTIFICATION));
        } catch (Exception e) {
            e.printStackTrace();
        }*/
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        try {
            LocalBroadcastManager.getInstance(this).unregisterReceiver(receiver);


        } catch (Exception e) {

        }
        /*try {
            unregisterReceiver(receiver);
        } catch (Exception e) {
            e.printStackTrace();
        }*/
    }

服务（火力基地）

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);
    Log.e("Msg", remoteMessage.getData().size() + "");
    //sendNotification(remoteMessage.getData());
    try {
        LocalBroadcastManager broadcaster = LocalBroadcastManager.getInstance(getBaseContext());
        HashMap<String, String> data = new HashMap<>();
        Bundle msg = new Bundle();
        for (String key : data.keySet()) {
            Log.e(key, data.get(key));
            msg.putString(key, data.get(key));
        }

        Intent intent = new Intent(REQUEST_ACCEPT);
        intent.setAction(REQUEST_ACCEPT);
        intent.putExtra("hashmap", msg);

        broadcaster.sendBroadcast(intent);


    } catch (Exception e) {
        Log.e("error" + "receiver", e.toString());
    }
4

4 回答 4

1 
Map<String, String> data = remoteMessage.getData();


    Bundle msg = new Bundle();
    for (String key : data.keySet()) {
        Log.e(key, data.get(key));
        msg.putString(key, data.get(key));
    }
于 2019-11-21T09:39:41.350 回答
0

那是因为您的 HashMap 数据为空。您正在创建 HasMap 的新对象并尝试从中获取实际上是空的值。

HashMap<String, String> data = new HashMap<>();
于 2017-05-13T08:29:27.047 回答
0

使用您在 onMessageReceived 中添加的一些键（应该保存在 R.strings 中）尝试 extra.getString(key) 而不是 intent.getBundleExtras("hashmap")

于 2017-05-13T08:37:58.793 回答
0

这是因为你刚刚初始化了它。但从不将数据传递给地图对象。所以 map 总是 null 。试试下面的代码

 Map<String, String> data = remoteMessage.getData();


        Bundle msg = new Bundle();
        for (String key : data.keySet()) {
            Log.e(key, data.get(key));
            msg.putString(key, data.get(key));
        }
于 2017-05-13T09:21:32.490 回答