Android使用的MQTT客户端

Android使用的MQTT客户端，支持订阅、发送消息；

支持创建连接到本地保存；

支持话题消息筛选；

使用视频：https://dwz.cn/undJFEnq
小米应用商店也有 【蘑菇IoT】~

核心代码贴一下，做个记录

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;

import androidx.annotation.Nullable;

import com.annimon.stream.Collectors;
import com.annimon.stream.Stream;
import com.freddon.android.snackkit.extension.regex.RegexHelper;
import com.freddon.android.snackkit.extension.tools.NetSuit;
import com.freddon.android.snackkit.log.Loger;
import com.qiniu.util.StringUtils;
import com.sagocloud.ntworker.agent.App;
import com.sagocloud.ntworker.agent.RxEventBus;
import com.sagocloud.ntworker.mqtt.ActionEventType;
import com.sagocloud.ntworker.mqtt.EventType;
import com.sagocloud.ntworker.mqtt.bean.MQTTConnectUserEntity;
import com.sagocloud.ntworker.mqtt.bean.MQTTMessage;
import com.sagocloud.ntworker.mqtt.bean.MqttConnectPoint;
import com.sagocloud.ntworker.mqtt.event.MQTTClientActionEvent;
import com.sagocloud.ntworker.mqtt.event.MQTTTransferEvent;
import com.sagocloud.ntworker.mqtt.event.MQTTMessageEvent;
import com.sagocloud.ntworker.mqtt.event.MQTTStateEvent;
import com.sagocloud.ntworker.mqtt.event.MQTTTraceEvent;

import org.eclipse.paho.android.service.MqttAndroidClient;
import org.eclipse.paho.android.service.MqttTraceHandler;
import org.eclipse.paho.client.mqttv3.DisconnectedBufferOptions;
import org.eclipse.paho.client.mqttv3.IMqttActionListener;
import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
import org.eclipse.paho.client.mqttv3.IMqttToken;
import org.eclipse.paho.client.mqttv3.MqttCallback;
import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
import org.eclipse.paho.client.mqttv3.MqttException;
import org.eclipse.paho.client.mqttv3.MqttMessage;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import java.util.concurrent.TimeUnit;

import io.reactivex.Observable;
import io.reactivex.disposables.CompositeDisposable;
import io.reactivex.disposables.Disposable;

public class MQTTService extends Service {

    public final static String CONN = "CON_MQTT_CF";
    private MqttAndroidClient mqttAndroidClient;
    private MQTTMessageEvent mQTTConnectEvent;
    private MQTTConnectUserEntity connectPoint;
    private MqttConnectOptions mMqttConnectOptions;

    private MqttCallback mqttCallback = new MqttCallback() {
        @Override
        public void connectionLost(Throwable cause) {
            mQTTConnectEvent = new MQTTMessageEvent();
            mQTTConnectEvent.setType(EventType.connectionLost);
            Loger.e("?connectionLost:", cause.getMessage());
            RxEventBus.post(mQTTConnectEvent);
            RxEventBus.post(new MQTTStateEvent(App.mqttIsConnected = false));
        }

        @Override
        public void messageArrived(String topic, MqttMessage message) throws Exception {
            mQTTConnectEvent = new MQTTMessageEvent();
            mQTTConnectEvent.setType(EventType.messageArrived);
            mQTTConnectEvent.setTopic(topic);
            mQTTConnectEvent.setMessage(message);
            Loger.e("✉️messageArrived:", topic);
            RxEventBus.post(mQTTConnectEvent);
        }

        @Override
        public void deliveryComplete(IMqttDeliveryToken token) {
            mQTTConnectEvent = new MQTTMessageEvent();
            mQTTConnectEvent.setType(EventType.deliveryComplete);
            try {
                mQTTConnectEvent.setTopic(StringUtils.join(token.getTopics(), ","));
                mQTTConnectEvent.setMessage(token.getMessage());
            } catch (MqttException e) {
                e.printStackTrace();
            }
            Loger.e("?deliveryComplete:", token.toString());
            RxEventBus.post(mQTTConnectEvent);
        }
    };

    private IMqttActionListener iMqttActionListener = new IMqttActionListener() {
        @Override
        public void onSuccess(IMqttToken asyncActionToken) {
            RxEventBus.post(new MQTTTransferEvent(asyncActionToken, null));
            Loger.e("?onSuccess:", "" + Arrays.toString(asyncActionToken.getTopics()));
            App.mqttIsConnected = true;
            RxEventBus.post(new MQTTStateEvent(true));
            DisconnectedBufferOptions disconnectedBufferOptions = new DisconnectedBufferOptions();
            disconnectedBufferOptions.setBufferEnabled(true);
            disconnectedBufferOptions.setBufferSize(100);
            disconnectedBufferOptions.setPersistBuffer(false);
            disconnectedBufferOptions.setDeleteOldestMessages(false);
            mqttAndroidClient.setBufferOpts(disconnectedBufferOptions);
        }

        @Override
        public void onFailure(IMqttToken asyncActionToken, Throwable exception) {
            RxEventBus.post(new MQTTTransferEvent(asyncActionToken, exception.getMessage()));
            Loger.e("?onFailure:", "" + exception.getMessage());
            App.mqttIsConnected = false;
            RxEventBus.post(new MQTTStateEvent(false));
        }
    };
    private CompositeDisposable subscription;
    private MqttTraceHandler traceCallback = new MqttTraceHandler() {
        @Override
        public void traceDebug(String tag, String message) {
            Loger.e("?traceDebug:" + tag, "" + message);
//            LiveDataBus.post(MQTTTraceEvent.class,new MQTTTraceEvent(MQTTTraceEvent.Type.DEBUG, tag, message));
            RxEventBus.post(new MQTTTraceEvent(MQTTTraceEvent.Type.DEBUG, tag, message));
        }

        @Override
        public void traceError(String tag, String message) {
            Loger.e("?traceError:" + tag, "" + message);
//            LiveDataBus.post(MQTTTraceEvent.class,new MQTTTraceEvent(MQTTTraceEvent.Type.ERROR, tag, message));
            RxEventBus.post(new MQTTTraceEvent(MQTTTraceEvent.Type.ERROR, tag, message));
        }

        @Override
        public void traceException(String tag, String message, Exception e) {
            Loger.e("?traceException:" + tag, "" + message + e.getMessage());
            RxEventBus.post(new MQTTTraceEvent(MQTTTraceEvent.Type.EXCEPTION, tag, message));
//            LiveDataBus.post(MQTTTraceEvent.class,new MQTTTraceEvent(MQTTTraceEvent.Type.EXCEPTION, tag, message));
        }
    };
    private Disposable actSubscription;
    private Disposable actTimerSubscription;


    public static void startService(Context context, MQTTConnectUserEntity point) {
        Intent service = new Intent();
        service.setClass(context, MQTTService.class);
        service.putExtra(CONN, point);
        context.startService(service);
    }

    private void $prepareActionHandler() {
        if (subscription == null) {
            subscription = new CompositeDisposable();
        }
        subscription.clear();
        if (actSubscription != null && actSubscription.isDisposed()) {
            actSubscription.dispose();
        }
        if (actTimerSubscription != null && actTimerSubscription.isDisposed()) {
            actTimerSubscription.dispose();
        }
        actSubscription = RxEventBus.subscribeIOEvent(
                MQTTClientActionEvent.class,
                event -> {
                    ActionEventType type = event.getEventType();
                    Object payload = event.getPayload();
                    switch (type) {
                        case connect:
                            connect();
                            break;
                        case publish:
                            if (payload instanceof MQTTMessage) {
                                publish((MQTTMessage) payload);
                            }
                            break;
                        case subscribe:
                            if (payload instanceof MQTTMessage) {
                                subscribe((MQTTMessage) payload);
                            }
                            break;
                        case unsubscribe:
                            if (payload instanceof MQTTMessage) {
                                unsubscribe((MQTTMessage) payload);
                            }
                            break;
                        case unsubscribe_all:
                            if (payload instanceof String[]) {
                                unsubscribeAll((String[]) payload);
                            }
                            break;
                        case close:
                            disconnect();
                            mqttAndroidClient = null;
                            App.mqttIsConnected = false;
                            RxEventBus.post(new MQTTStateEvent(false));
                            stopSelf();
                            break;
                    }
                },
                error -> {
                    Loger.d("error", error.getMessage());
                }
        );
        actTimerSubscription = Observable.interval(2000, TimeUnit.MILLISECONDS)
                .subscribe((i) -> {
                    App.mqttIsConnected = mqttAndroidClient != null && mqttAndroidClient.isConnected();
                    RxEventBus.post(new MQTTStateEvent(App.mqttIsConnected));
                });
        subscription.add(actSubscription);
        subscription.add(actTimerSubscription);
    }

    @Override
    public void onDestroy() {
        disconnect();
        RxEventBus.unsubscribeEvent(subscription);
        super.onDestroy();
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        if (intent != null) {
            connectPoint = intent.getParcelableExtra(CONN);
            if (connectPoint != null) {
                $prepareActionHandler();
                connect();
            } else {
                if (mqttAndroidClient != null && mqttAndroidClient.isConnected()) {
                    connect();
                }
            }
        }
        return super.onStartCommand(intent, flags, startId);
    }

    private void $prepared(MqttConnectPoint connectPoint) {
        String serverURI = String.format(Locale.ENGLISH, "%s://%s:%s", connectPoint.isUseSSL() ? "ssl" : "tcp", connectPoint.getHost(), connectPoint.getPort());
        if (mqttAndroidClient != null) {
            disconnect();
        }
        mqttAndroidClient = new MqttAndroidClient(this, serverURI, connectPoint.getClientId());
        mqttAndroidClient.setCallback(mqttCallback); //设置监听订阅消息的回调
        mqttAndroidClient.setTraceEnabled(true);
        mqttAndroidClient.setTraceCallback(traceCallback);
        mMqttConnectOptions = new MqttConnectOptions();
        mMqttConnectOptions.setMqttVersion(connectPoint.getVersion());
        mMqttConnectOptions.setMaxInflight(connectPoint.getMaxInflight());
        mMqttConnectOptions.setAutomaticReconnect(connectPoint.isAutoReconnect());
        mMqttConnectOptions.setCleanSession(connectPoint.isClearSession()); //设置是否清除缓存
        mMqttConnectOptions.setConnectionTimeout(connectPoint.getConnectTimeout()); //设置超时时间，单位：秒
        mMqttConnectOptions.setKeepAliveInterval(connectPoint.getTickTime()); //设置心跳包发送间隔，单位：秒
        if (RegexHelper.isAllNotEmpty(connectPoint.getUserName(), connectPoint.getUserPasswort())) {
            mMqttConnectOptions.setUserName(connectPoint.getUserName()); //设置用户名
            mMqttConnectOptions.setPassword(connectPoint.getUserPasswort().toCharArray()); //设置密码
        }
        if (connectPoint.isUseSSL() && connectPoint.getSslProperties() != null) {
            mMqttConnectOptions.setSSLProperties(connectPoint.getSslProperties());
        }
        if (RegexHelper.isNotEmpty(connectPoint.getLwt())) {
            mMqttConnectOptions.setWill(connectPoint.getLwt().getTopic(), connectPoint.getLwt().getMessage().getBytes(), connectPoint.getLwt().getQos(), connectPoint.getLwt().isRetained());
        }
    }

    private void connect() {
        if (mqttAndroidClient == null) {
            $prepared(connectPoint);
        }
        if (!mqttAndroidClient.isConnected() && NetSuit.checkEnable(this)) {
            try {
                mqttAndroidClient.connect(mMqttConnectOptions, null, iMqttActionListener);
            } catch (MqttException e) {
                e.printStackTrace();
            }
        }

    }

    private void disconnect() {
        try {
            if (mqttAndroidClient == null) return;
            mqttAndroidClient.unregisterResources();
            mqttAndroidClient.disconnect();
            mqttAndroidClient.close();
        } catch (MqttException e) {
            e.printStackTrace();
        } finally {
            mqttAndroidClient = null;
        }

    }

    private void subscribe(MQTTMessage subscribe) {
        try {
            if (mqttAndroidClient == null || subscribe == null || subscribe.getTopic() == null)
                return;
            MqttMessage.validateQos(subscribe.getQos());
            List sub = connectPoint.getSubTopics();
            if (sub == null) {
                sub = new ArrayList<>();
            }
            Long count = Stream.of(sub)
                    .filter(item -> subscribe.getTopic().equalsIgnoreCase(item.getTopic()))
                    .collect(Collectors.counting());
            if (count > 0) {
                return;
            }
            sub.add(subscribe);
            connectPoint.setSubTopics(sub);
            mqttAndroidClient.subscribe(subscribe.getTopic(), subscribe.getQos());
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }

    private void subscribeAll(String[] topics, int[] qos) {
        if (RegexHelper.isAnyEmpty(topics, qos)) return;
        if (mqttAndroidClient == null) return;
        if (topics.length != qos.length) return;
        try {
            mqttAndroidClient.subscribe(topics, qos);
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }

    private void unsubscribe(MQTTMessage subscribe) {
        try {
            if (mqttAndroidClient == null || connectPoint == null) return;
            List sub = connectPoint.getSubTopics();
            if (sub != null) {
                List filtered = Stream.of(sub)
                        .filter(item -> !subscribe.getTopic().equalsIgnoreCase(item.getTopic()))
                        .collect(Collectors.toList());
                connectPoint.setSubTopics(filtered);
            }
            mqttAndroidClient.unsubscribe(subscribe.getTopic());
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }

    private void unsubscribeAll(String[] topics) {
        try {
            if (mqttAndroidClient == null) return;
            if (topics == null) mqttAndroidClient.unsubscribe("#");
            else {
                mqttAndroidClient.unsubscribe(topics);
            }
            if (connectPoint != null) {
                connectPoint.setSubTopics(null);
            }
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }

    private void publish(MQTTMessage subscribe) {
        try {
            MqttMessage.validateQos(subscribe.getQos());
            mqttAndroidClient.publish(subscribe.getTopic(), subscribe.getMessage().getBytes(), subscribe.getQos(), subscribe.isRetained());
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (MqttException e) {
            e.printStackTrace();
        }
    }

}