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  • Google Messages Nearby Api用来在两个 android 设备之间简单地交换小消息。
  • 我想republish在单击按钮时收到更新的消息,但通常会失败。我所做的是首先取消发布消息对象,然后再次使用新数据发布它,如下所示,但它经常失败。

发送消息的设备 1 代码:

class Testing extends Activity{

    MessageListener mMessageListener;
    Message mMessage;
    MessagesClient messagesClient;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_testing);

      mMessage = new Message('data in bytes');
      messagesClient = Nearby.getMessagesClient(this);
      mMessageListener = new MessageListener() {
      
        @Override
        public void onFound(Message message) {
          Log.d(TAG, "onFound :--- " + message);
        }
    
        @Override
        public void onLost(Message message) {
           Log.d(TAG, "onLost :--- " + message);
        }
    
     }
    
    startNearbyMessage();

    }


    private void startNearbyMessage() {
        if (messagesClient != null && mMessageListener != null) {
           
            messagesClient.publish(mMessage);
           
            SubscribeOptions options = new SubscribeOptions.Builder()
                    .setStrategy(Strategy.BLE_ONLY)
                    .build();
            messagesClient.subscribe(mMessageListener, options);
        }
    }

    @Override
    protected void onDestroy() {
        try {
          AppLog.e(TAG, "Stop NearBy Message : ");
          isNetworkingAlreadyStarted = false;

           if (messagesClient != null) {
             if (mMessage != null)
                messagesClient.unpublish(mMessage);

             if (mMessageListener != null)
                messagesClient.unsubscribe(mMessageListener);
           }

        } catch (Exception ex) {
          AppLog.e(TAG, "stopNearByMessgae Ex : " + ex.toString());
        }
     }

}

我的问题是我想在单击按钮时重新发布一条新消息,所以我将此代码放在单击侦听器上:

//updated mMessage object with new data:
messagesClient.unpublish(mMessage)
messagesClient.publish(mMessage)

但通常消息不会发布,并且 onFound 仍然保留旧数据。

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0 回答 0