打印 Mqtt 主题并选择一个订阅其中一个

Question

我正在努力解决一个问题，这个问题是关于在 android 的多个文本视图中显示来自代理服务器的可用 mqtt 主题，并选择其中一个来订阅主题    final MqttAndroidClient client =new MqttAndroidClient(getApplicationContext(),"tcp://iot.eclipse.org:1883","12d45454");    try {        client.connect(mqttConnectOptions, null, new IMqttActionListener() {            @Override            public void onSuccess(IMqttToken mqttToken) {                DisconnectedBufferOptions disconnectedBufferOptions = new DisconnectedBufferOptions();                disconnectedBufferOptions.setBufferEnabled(true);                disconnectedBufferOptions.setBufferSize(100);                disconnectedBufferOptions.setPersistBuffer(false);                disconnectedBufferOptions.setDeleteOldestMessages(false);                Log.i("ERROR ","Topic="+mqttToken.getTopics());                textview1.setText(mqttToken.getTopics()[0]);            }