Android Apollo MQTT入门
一、Apache Apollo服务器其实是一个消息中转站
下载地址 http://activemq.apache.org/apollo/download.html
服务搭建方式,参看博客Android APP必备高级功能,消息推送之MQTT
1、命令行进入解压后bin目录(例:E:>cd E:\MQTT\apache-apollo-1.7.1\bin)。
2、输入apollo create XXX(xxx为创建的服务器实例名称,例:apollo create mybroker),之后会在bin目录下创建名称为XXX的文件夹。
XXX文件夹下etc\apollo.xml文件下是配置服务器信息的文件。
etc\users.properties文件包含连接MQTT服务器时用到的用户名和密码,默认为admin=password,即账号为admin,密码为password,可自行更改。
3、进入XXX/bin目录,输入apollo-broker.cmd run开启服务器,看到如下界面代表搭建完成
4、添加Windows服务
进入XXX/bin目录,如下图:
二、Android
AndroidManifest
<uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.WAKE_LOCK" />
<!-- Mqtt Service --> <service android:name="org.eclipse.paho.android.service.MqttService" /> <service android:name="com.zyp.mqtt.MQTTService"/>
依赖项
buildscript { repositories { jcenter() } dependencies { classpath 'com.android.tools.build:gradle:2.3.2' // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files } } allprojects { repositories { jcenter() mavenCentral() maven { url "https://repo.eclipse.org/content/repositories/paho-releases/" } } }
compile 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.1.0' compile 'org.eclipse.paho:org.eclipse.paho.android.service:1.1.0' compile 'org.greenrobot:eventbus:3.0.0'
Android Service
public class MQTTService extends Service { public static final String TAG = MQTTService.class.getSimpleName(); private static MqttAndroidClient client; private MqttConnectOptions conOpt; private String host = "tcp://10.0.2.2:61613";private String userName = "admin"; private String passWord = "password"; private static String myTopic = "topic"; private String clientId = "test"; @Override public int onStartCommand(Intent intent, int flags, int startId) { init(); return super.onStartCommand(intent, flags, startId); } public static void publish(String msg){ String topic = myTopic; Integer qos = 0; Boolean retained = false; try { client.publish(topic, msg.getBytes(), qos.intValue(), retained.booleanValue()); } catch (MqttException e) { e.printStackTrace(); } } private void init() { // 服务器地址(协议+地址+端口号) String uri = host; client = new MqttAndroidClient(this, uri, clientId); // 设置MQTT监听并且接受消息 client.setCallback(mqttCallback); conOpt = new MqttConnectOptions(); // 清除缓存 conOpt.setCleanSession(true); // 设置超时时间,单位:秒 conOpt.setConnectionTimeout(10); // 心跳包发送间隔,单位:秒 conOpt.setKeepAliveInterval(20); // 用户名 conOpt.setUserName(userName); // 密码 conOpt.setPassword(passWord.toCharArray()); // last will message boolean doConnect = true; String message = "{\"terminal_uid\":\"" + clientId + "\"}"; String topic = myTopic; Integer qos = 0; Boolean retained = false; if ((!message.equals("")) || (!topic.equals(""))) { // 最后的遗嘱 try { conOpt.setWill(topic, message.getBytes(), qos.intValue(), retained.booleanValue()); } catch (Exception e) { Log.i(TAG, "Exception Occured", e); doConnect = false; iMqttActionListener.onFailure(null, e); } } if (doConnect) { doClientConnection(); } } @Override public void onDestroy() { try { client.disconnect(); } catch (MqttException e) { e.printStackTrace(); } super.onDestroy(); } /** 连接MQTT服务器 */ private void doClientConnection() { if (!client.isConnected() && isConnectIsNomarl()) { try { client.connect(conOpt, null, iMqttActionListener); } catch (MqttException e) { e.printStackTrace(); } } } // MQTT是否连接成功 private IMqttActionListener iMqttActionListener = new IMqttActionListener() { @Override public void onSuccess(IMqttToken arg0) { Log.i(TAG, "连接成功 "); try { // 订阅myTopic话题 client.subscribe(myTopic,1); } catch (MqttException e) { e.printStackTrace(); } } @Override public void onFailure(IMqttToken arg0, Throwable arg1) { arg1.printStackTrace(); // 连接失败,重连 } }; // MQTT监听并且接受消息 private MqttCallback mqttCallback = new MqttCallback() { @Override public void messageArrived(String topic, MqttMessage message) throws Exception { String str1 = new String(message.getPayload()); MQTTMessage msg = new MQTTMessage(); msg.setMessage(str1); EventBus.getDefault().post(msg); String str2 = topic + ";qos:" + message.getQos() + ";retained:" + message.isRetained(); Log.i(TAG, "messageArrived:" + str1); Log.i(TAG, str2); } @Override public void deliveryComplete(IMqttDeliveryToken arg0) { } @Override public void connectionLost(Throwable arg0) { // 失去连接,重连 } }; /** 判断网络是否连接 */ private boolean isConnectIsNomarl() { ConnectivityManager connectivityManager = (ConnectivityManager) this.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo info = connectivityManager.getActiveNetworkInfo(); if (info != null && info.isAvailable()) { String name = info.getTypeName(); Log.i(TAG, "MQTT当前网络名称:" + name); return true; } else { Log.i(TAG, "MQTT 没有可用网络"); return false; } } @Nullable @Override public IBinder onBind(Intent intent) { return null; } }
MainActivity 界面方法
public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); EventBus.getDefault().register(this); startService(new Intent(this, MQTTService.class)); findViewById(R.id.publishBtn).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { MQTTService.publish("CSDN 一口仨馍"); } }); } @Subscribe(threadMode = ThreadMode.MAIN) public void getMqttMessage(MQTTMessage mqttMessage){ Log.i(MQTTService.TAG,"get message:"+mqttMessage.getMessage()); Toast.makeText(this,mqttMessage.getMessage(),Toast.LENGTH_SHORT).show(); } @Override protected void onDestroy() { EventBus.getDefault().unregister(this); super.onDestroy(); } }
三、Java服务端
pom文件
<!-- https://mvnrepository.com/artifact/org.eclipse.paho/org.eclipse.paho.client.mqttv3 --> <dependency> <groupId>org.eclipse.paho</groupId> <artifactId>org.eclipse.paho.client.mqttv3</artifactId> <version>1.1.0</version> </dependency>
Server 程序入口
package com.zyp.mqtt; import org.eclipse.paho.client.mqttv3.MqttClient; import org.eclipse.paho.client.mqttv3.MqttConnectOptions; import org.eclipse.paho.client.mqttv3.MqttDeliveryToken; import org.eclipse.paho.client.mqttv3.MqttException; import org.eclipse.paho.client.mqttv3.MqttMessage; import org.eclipse.paho.client.mqttv3.MqttPersistenceException; import org.eclipse.paho.client.mqttv3.MqttTopic; import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence; public class Server { public static final String HOST = "tcp://localhost:61613"; public static final String TOPIC = "topic"; private static final String clientid ="zhaoyazhou_server"; private MqttClient client; private MqttTopic topic; private String userName = "admin"; private String passWord = "password"; private MqttMessage message; public Server() throws MqttException { //MemoryPersistence设置clientid的保存形式,默认为以内存保存 client = new MqttClient(HOST, clientid, new MemoryPersistence()); connect(); } private void connect() { MqttConnectOptions options = new MqttConnectOptions(); options.setCleanSession(true); options.setUserName(userName); options.setPassword(passWord.toCharArray()); // 设置超时时间 options.setConnectionTimeout(10); // 设置会话心跳时间 options.setKeepAliveInterval(20); try { client.setCallback(new PushCallback()); client.connect(options); topic = client.getTopic(TOPIC); } catch (Exception e) { e.printStackTrace(); } } public void publish(MqttMessage message) throws MqttPersistenceException, MqttException{ MqttDeliveryToken token = topic.publish(message); token.waitForCompletion(); System.out.println(token.isComplete()+"========"); } public static void main(String[] args) throws MqttException { Server server = new Server(); server.message = new MqttMessage(); server.message.setQos(1); server.message.setRetained(true); server.message.setPayload("Server测试MQTT推送消息".getBytes()); server.publish(server.message); System.out.println(server.message.isRetained()+"------ratained状态"); } }
回调函数 PushCallback
package com.zyp.mqtt; import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken; import org.eclipse.paho.client.mqttv3.MqttCallback; import org.eclipse.paho.client.mqttv3.MqttMessage; public class PushCallback implements MqttCallback { @Override public void connectionLost(Throwable arg0) { // 连接丢失后,一般在这里面进行重连 System.out.println("连接断开,可以做重连"); } @Override public void deliveryComplete(IMqttDeliveryToken token) { // publish后会执行到这里 System.out.println("deliveryComplete---------"+ token.isComplete()); } @Override public void messageArrived(String topic, MqttMessage message) throws Exception { // subscribe后得到的消息会执行到这里面 System.out.println("订阅的字符串:"+topic); System.out.println("消息内容:"+message.toString()); } }
四、调试
启动Apollo服务
将Android App启动,链接上服务器,如图:
启动服务端程序,发送信息,如图:
手机端接收到信息,如图:
参考博客:Android APP必备高级功能,消息推送之MQTT
参考博客:MQTT JAVA发送、订阅、收集消息
参考文章:MQTT Part 4 发布,订阅和退订
参考文章:MQTT基础入门第四部分:MQTT 发布,订阅以及退订
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