android集成阿里MQTT

• 在项目app build.gradle中，

dependencies {    compile 'org.eclipse.paho:org.eclipse.paho.client.mqttv3:1.0.2'    compile group: 'commons-codec', name: 'commons-codec', version: '1.5'   }

MqttRecvClient.java类

public class MqttRecvClient {    /**     * 设置当前用户私有的MQTT的接入点。例如此处示意使用XXX，实际使用请替换用户自己的接入点。接入点的获取方法是，在控制台申请MQTT实例，每个实例都会分配一个接入点域名。     */    final String broker ="tcp://xxx.mqtt.aliyuncs.com:1883";    /**     * 设置阿里云的AccessKey，用于鉴权     */    final String acessKey ="xxx";    /**    * 设置阿里云的SecretKey，用于鉴权    */    final String secretKey ="xxx";    /**     * 发消息使用的一级Topic，需要先在MQ控制台里申请     */   final String topic ="xxx";    /**     * MQTT的ClientID，一般由两部分组成，GroupID@@@DeviceID     * 其中GroupID在MQ控制台里申请     * DeviceID由应用方设置，可能是设备编号等，需要唯一，否则服务端拒绝重复的ClientID连接     */    final String consumerClientId ="GID_abc@@@"+System.currentTimeMillis();    String sign;    MemoryPersistence persistence = new MemoryPersistence();    MqttClient sampleClient;    MqttConnectOptions connOpts;    MqttThread mqttThread;    private static MqttRecvClient mqttRecvClient;    MessageListener messageListener;    private static boolean openLog=true;    private MqttRecvClient(@NonNull MessageListener messageListener){        if (mqttThread==null){            mqttThread=new MqttThread();        }        this.messageListener=messageListener;        mqttThread.start();    }    public static void init(Context context){        Intent intent=new Intent(context,MQTTService.class);        context.startService(intent);    }    public static void create(@NonNull MessageListener messageListener){        if (mqttRecvClient==null){            mqttRecvClient=new MqttRecvClient(messageListener);        }    }    class MqttThread extends Thread{        @Override        public void run() {            super.run();            if (sampleClient==null){                execut();            }        }    }    private   void execut() {        try {              sampleClient = new MqttClient(broker, consumerClientId, persistence);              connOpts = new MqttConnectOptions();            log(tag,"Connecting to broker: " + broker);            /**             * 计算签名，将签名作为MQTT的password。             * 签名的计算方法，参考工具类MacSignature，第一个参数是ClientID的前半部分，即GroupID             * 第二个参数阿里云的SecretKey             */            sign = MacSignature.macSignature(consumerClientId.split("@@@")[0], secretKey);//            /**//             * 设置订阅方订阅的Topic集合，此处遵循MQTT的订阅规则，可以是一级Topic，二级Topic,P2P消息不需要显式订阅，//             *///            final String[] topicFilters=new String[]{topic};//            final int[]qos={0};            /**             * 设置订阅方订阅的Topic集合，此处遵循MQTT的订阅规则，可以是一级Topic，二级Topic，P2P消息请订阅/p2p             */            final String[] topicFilters=new String[]{topic+"/notice/",topic+"/p2p"};            final int[]qos={0,0};            connOpts.setUserName(acessKey);            connOpts.setServerURIs(new String[] { broker });            connOpts.setPassword(sign.toCharArray());            connOpts.setCleanSession(true);            connOpts.setKeepAliveInterval(100);            sampleClient.setCallback(new MqttCallback() {                public void connectionLost(Throwable throwable) {                    log(tag,"mqtt connection lost");                    throwable.printStackTrace();                    while(!sampleClient.isConnected()){                        try {                            sampleClient.connect(connOpts);                            sampleClient.subscribe(topicFilters,qos);                        } catch (MqttException e) {                            e.printStackTrace();                        }                        try {                            Thread.sleep(1000);                        } catch (InterruptedException e) {                            e.printStackTrace();                        }                    }                }                public void messageArrived(String topic, MqttMessage mqttMessage)  {                    log(tag,"messageArrived:" + topic + "------" + new String(mqttMessage.getPayload()));                    if (messageListener!=null){                        messageListener.onMessageArrived(topic, mqttMessage);                    }                }                public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {                    log(tag,"deliveryComplete:" + iMqttDeliveryToken.getMessageId());                }            });            sampleClient.connect(connOpts);            sampleClient.subscribe(topicFilters,qos);            //Thread.sleep(Integer.MAX_VALUE);            log(tag,"end method");        } catch (Exception me) {            me.printStackTrace();        }    }    public interface MessageListener{        void onMessageArrived(String topic,MqttMessage mqttMessage);    }    public static void openLog(boolean bool){        openLog=bool;    }    private void log(String tag,String msg){        if (openLog) {            Log.d(tag, msg);        }    }    private String tag="MqttRecvClient--";}

加密工具类：MacSignature.java

import org.apache.commons.codec.binary.Base64;import java.nio.charset.Charset;import java.security.InvalidKeyException;import java.security.NoSuchAlgorithmException;import java.util.ArrayList;import java.util.Collections;import java.util.List;import javax.crypto.Mac;import javax.crypto.spec.SecretKeySpec;public class MacSignature {    /**     * @param text      要签名的文本     * @param secretKey 阿里云MQ secretKey     * @return 加密后的字符串     * @throws InvalidKeyException     * @throws NoSuchAlgorithmException     */    public static String macSignature(String text, String secretKey) throws InvalidKeyException, NoSuchAlgorithmException {        Charset charset = Charset.forName("UTF-8");        String algorithm = "HmacSHA1";        Mac mac = Mac.getInstance(algorithm);        mac.init(new SecretKeySpec(secretKey.getBytes(charset), algorithm));        byte[] bytes = mac.doFinal(text.getBytes(charset));        return new String(Base64.encodeBase64(bytes), charset);    }    /**     * 发送方签名方法     *     * @param clientId  Mqtt ClientId     * @param secretKey 阿里云MQ secretKey     * @return 加密后的字符串     * @throws NoSuchAlgorithmException     * @throws InvalidKeyException     */    public static String publishSignature(String clientId, String secretKey) throws NoSuchAlgorithmException, InvalidKeyException {        return macSignature(clientId, secretKey);    }    /**     * 订阅方签名方法     *     * @param topics    要订阅的Topic集合     * @param clientId  Mqtt ClientId     * @param secretKey 阿里云MQ secretKey     * @return 加密后的字符串     * @throws NoSuchAlgorithmException     * @throws InvalidKeyException     */    public static String subSignature(List<String> topics, String clientId, String secretKey) throws NoSuchAlgorithmException, InvalidKeyException {        Collections.sort(topics); //以字典顺序排序        String topicText = "";        for (String topic : topics) {            topicText += topic + "\n";        }        String text = topicText + clientId;        return macSignature(text, secretKey);    }    /**     * 订阅方签名方法     *     * @param topic     要订阅的Topic     * @param clientId  Mqtt ClientId     * @param secretKey 阿里云MQ secretKey     * @return 加密后的字符串     * @throws NoSuchAlgorithmException     * @throws InvalidKeyException     */    public static String subSignature(String topic, String clientId, String secretKey) throws NoSuchAlgorithmException, InvalidKeyException {        List<String> topics = new ArrayList<String>();        topics.add(topic);        return subSignature(topics, clientId, secretKey);    }}

MQTTService.java类

import org.eclipse.paho.client.mqttv3.MqttMessage;public class MQTTService extends Service {    public MQTTService() {    }    @Override    public void onCreate() {        super.onCreate();        MqttRecvClient.create(new MqttRecvClient.MessageListener() {            @Override            public void onMessageArrived(String topic, MqttMessage mqttMessage) {                if(BuildConfig.DEBUG) {                    Log.d("MQTTService ", "收到消息，topic=" + topic + ",message=" + new String(mqttMessage.getPayload()));                }            }        });    }    @Override    public IBinder onBind(Intent intent) {       return new MyBinder();    }    class MyBinder extends Binder{        public MQTTService getService(){            return MQTTService.this;        }    }}

在AndroidManifest.xml中添加一个service:

 <application        android:name=".App"        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <!--mqttservice-->          <service android:name=".mqtt.MQTTService">            android:enabled="true"            android:exported="true"        </service>    </application>

使用方法：在mainActivity.java中调用：

MqttRecvClient.init(context);