Page 204 - MDP2022-2

public void setSymbol(int symbol_resID) {
symbol.setImageResource(symbol_resID);
}

public void setTextColor(int color) {
text.setTextColor(color);
}

public void setText(String text_string) {
text.setText(text_string);
}

public void setText(int text_resID) {
text.setText(text_resID);
}
}

package com.headthings.mdp_project_2022;

import android.widget.Toast;

import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttClient;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;

public class Mqtt implements MqttCallback {
private final String ServerIP = "tcp://192.168.0.100:1883";
private static MqttClient mqttClient;

private Mqtt() {
try {
mqttClient = new MqttClient(ServerIP, MqttClient.generateClientId(), null);
mqttClient.setCallback(this);
} catch (MqttException e) {
e.printStackTrace();
}
}

public static MqttClient getInstance() {
if (mqttClient == null) {
new Mqtt();
}
return mqttClient;