利用ActiveMQ使用mqttv3发消息Android接收消息

在Linux服务器端安装好并启动ActiveMQ后使用

一、发送消息

public interface PushCallBack {    int saveOnDone(boolean isOk);}

import org.eclipse.paho.client.mqttv3.*;import org.eclipse.paho.client.mqttv3.persist.MqttDefaultFilePersistence;public class MQTT {    private String host = "tcp://192.168.0.1:1883";    private String userName = "admin";    private String passWord = "admin";    private MqttClient client = null;    public static void main(String[] args) {        //发送消息        MQTT mq = new MQTT();        mq.passWord = "admin";        for (int i = 0; i < 2; i++) {            mq.send("Jaycekon-MQ", "HelloTest" + i, new PushCallBack() {                @Override                public int saveOnDone(boolean isOk) {                    System.out.println("MQTT.main(...).new PushCallBack() {...}.saveOnDone()");                    return 0;                }            });        }    }    private static MQTT mqtt = null;    public static MQTT get() {        if (mqtt == null) {            mqtt = new MQTT();        }        return mqtt;    }    private MQTT() {        init();    }    private void init() {        try {            String clientid = MqttClient.generateClientId();            if (clientid.length() > 23) {                clientid = clientid.substring(clientid.length() - 23);            }            client = new MqttClient(host, clientid,                    new MqttDefaultFilePersistence());            MqttConnectOptions options = new MqttConnectOptions();            options.setCleanSession(false);            options.setUserName(userName);            options.setPassword(passWord.toCharArray());            options.setConnectionTimeout(10);            options.setKeepAliveInterval(20);            client.setCallback(new MqttCallback() {                @Override                public void connectionLost(Throwable cause) {                    System.out                            .println("MqttCallback connectionLost-----------连接丢失");                }                @Override                public void deliveryComplete(IMqttDeliveryToken token) {                    System.out                            .println("MqttCallback deliveryComplete---------交付完成"                                    + token.getMessageId()                                    + "|"                                    + token.isComplete());                }                @Override                public void messageArrived(String topic, MqttMessage arg1)                        throws Exception {                    System.out                            .println("MqttCallback messageArrived----------消息到达");                }            });            client.connect(options);        } catch (Exception e) {            e.printStackTrace();        }    }    private void close() {        try {            if (client != null) {                client.close();                client = null;            }        } catch (Exception e) {            e.printStackTrace();        }    }    public void send(final String topics, final String notify,            PushCallBack pushCallBack) {        send(topics, notify, 1, pushCallBack);    }    private void send(final String topics, final String notify,            final int trycnt, final PushCallBack pushCallBack) {        try {            MqttDeliveryToken token;            MqttMessage message;            MqttTopic topic = client.getTopic(topics);            message = new MqttMessage();            message.setQos(2);            message.setRetained(true);            message.setPayload(notify.getBytes("UTF-8"));            token = topic.publish(message);            final int msgid = token.getMessageId();            System.out                    .println(message.isRetained() + "------ratained|" + msgid);            token.setActionCallback(new IMqttActionListener() {                @Override                public void onFailure(IMqttToken arg0, Throwable arg1) {                    if (pushCallBack != null) {                        pushCallBack.saveOnDone(false);                    }                    System.out.println(msgid + "------ActionCallback false");                }                @Override                public void onSuccess(IMqttToken arg0) {                    if (pushCallBack != null)                        pushCallBack.saveOnDone(true);                    System.out.println(msgid + "------ActionCallback true");                }            });            token.waitForCompletion();        } catch (Exception e) {            if (trycnt < 2) {// 继续尝试一次                close();                init();                send(topics, notify, trycnt + 1, pushCallBack);            } else {                e.printStackTrace();            }        }    }}

二、Android接收消息

public class MainActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Intent intent = new Intent(this, MQTTService.class);        startService(intent);    }}

package com.lgz.mq;import android.app.Service;import android.content.Intent;import android.os.IBinder;import android.widget.Toast;import org.eclipse.paho.client.mqttv3.MqttClient;import org.eclipse.paho.client.mqttv3.MqttConnectOptions;import org.eclipse.paho.client.mqttv3.MqttException;import org.eclipse.paho.client.mqttv3.MqttTopic;import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;public class MQTTService extends Service {    //消息服务器的URL    public static final String BROKER_URL = "tcp://192.168.199.174:1883";    //客户端ID，用来标识一个客户，可以根据不同的策略来生成    public static final String clientId = "admin";    //订阅的主题名    public static final String TOPIC = "Jaycekon-MQ";    //mqtt客户端类    private MqttClient mqttClient;    //mqtt连接配置类    private MqttConnectOptions options;    private String userName = "admin";    private String passWord = "admin";    public IBinder onBind(Intent intent) {        return null;    }    @Override    public int onStartCommand(Intent intent, int flags, int startId) {        try {            //在服务开始时new一个mqttClient实例，客户端ID为clientId，第三个参数说明是持久化客户端，如果是null则是非持久化            mqttClient = new MqttClient(BROKER_URL, clientId, new MemoryPersistence());            // MQTT的连接设置            options = new MqttConnectOptions();            // 设置是否清空session,这里如果设置为false表示服务器会保留客户端的连接记录，这里设置为true表示每次连接到服务器都以新的身份连接            //换而言之，设置为false时可以客户端可以接受离线消息            options.setCleanSession(false);            // 设置连接的用户名            options.setUserName(userName);            // 设置连接的密码            options.setPassword(passWord.toCharArray());            // 设置超时时间 单位为秒            options.setConnectionTimeout(10);            // 设置会话心跳时间 单位为秒 服务器会每隔1.5*20秒的时间向客户端发送个消息判断客户端是否在线，但这个方法并没有重连的机制            options.setKeepAliveInterval(20);            // 设置回调  回调类的说明看后面            mqttClient.setCallback(new PushCallback());            MqttTopic topic = mqttClient.getTopic(TOPIC);            //setWill方法，如果项目中需要知道客户端是否掉线可以调用该方法。设置最终端口的通知消息            options.setWill(topic, "close".getBytes(), 2, true);            //mqtt客户端连接服务器            mqttClient.connect(options);            //mqtt客户端订阅主题            //在mqtt中用QoS来标识服务质量            //QoS=0时，报文最多发送一次，有可能丢失            //QoS=1时，报文至少发送一次，有可能重复            //QoS=2时，报文只发送一次，并且确保消息只到达一次。            int[] Qos = {1};            String[] topic1 = {TOPIC};            mqttClient.subscribe(topic1, Qos);        } catch (MqttException e) {            Toast.makeText(getApplicationContext(), "Something went wrong!" + e.getMessage(), Toast.LENGTH_LONG).show();            e.printStackTrace();        }        return super.onStartCommand(intent, flags, startId);    }    @Override    public void onDestroy() {        try {            mqttClient.disconnect(0);        } catch (MqttException e) {            Toast.makeText(getApplicationContext(), "Something went wrong!" + e.getMessage(), Toast.LENGTH_LONG).show();            e.printStackTrace();        }    }}

package com.lgz.mq;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 cause) {        System.out.println("连接失败---");    }    @Override    public void messageArrived(String topic, MqttMessage message) throws Exception {        System.out.println(" 有新消息到达时的回调方法");        System.out.println(" topic = " + topic);        String msg = new String(message.getPayload());        System.out.println("msg = " + msg);        System.out.println("qos = " + message.getQos());    }    @Override    public void deliveryComplete(IMqttDeliveryToken token) {        System.out.println("--deliveryComplete--成功发布某一消息后的回调方法");    }}

别忘了在AndroidManifest.xml中添加服务和网络权限等

<uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <service android:name=".MQTTService" />    </application>

附件 mqttv3.jar下载