feat: MQTT通信模块 - TCP连接+消息分发
新增： - MqttConfig MQTT连接配置（TCP:1883, 心跳120s, 自动重连） - MqttManager 连接管理器（连接/订阅3个Topic/消息解析/EventBus分发） - AppEvent 新增 MqttConnected/MqttDisconnected/MqttMessageReceived 修改： - build.gradle.kts MQTT_URL改为MQTT_HOST（TCP不需要路径） - EnvConfig 适配MQTT_HOST - HomeFragment 连接MQTT并显示连接状态 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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dongliang
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package com.xiaoqu.watch.service.manager
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/**
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* MQTT 连接配置常量
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*/
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object MqttConfig {
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/** TCP 端口（标准 MQTT 端口） */
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const val PORT = 1883
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/** 认证用户名（所有手表设备共用） */
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const val USERNAME = "watch"
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/** 认证密码 */
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const val PASSWORD = "xiaoquwatch"
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/** 心跳间隔（秒）— 满足 ≥60s 功耗红线，低于 4G NAT 超时 */
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const val KEEP_ALIVE_INTERVAL = 120
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/** 连接超时（秒） */
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const val CONNECTION_TIMEOUT = 15
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/** 是否自动重连（Paho 内置指数退避：1s→2s→4s→...→128s） */
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const val AUTO_RECONNECT = true
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/** 清除会话（每次连接重新订阅） */
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const val CLEAN_SESSION = true
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/** 订阅 QoS — 设备专属 Topic */
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const val QOS_DEVICE = 2
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/** 订阅 QoS — 广播 Topic */
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const val QOS_BROADCAST = 0
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/** 广播 Topic：手表参数变更 */
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const val TOPIC_WATCH_PARAMS = "WatchSetParamsInit"
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/** 广播 Topic：振动方案变更 */
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const val TOPIC_SHOCK_PARAMS = "WatchShockSetParamsInit"
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}
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package com.xiaoqu.watch.service.manager
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import com.xiaoqu.watch.data.prefs.DevicePrefs
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import com.xiaoqu.watch.event.AppEvent
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import com.xiaoqu.watch.event.EventBus
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import com.xiaoqu.watch.network.EnvConfig
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import kotlinx.coroutines.CoroutineScope
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import kotlinx.coroutines.Dispatchers
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import kotlinx.coroutines.SupervisorJob
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import kotlinx.coroutines.launch
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import org.eclipse.paho.client.mqttv3.*
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import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence
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import org.json.JSONObject
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import timber.log.Timber
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import javax.inject.Inject
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import javax.inject.Singleton
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/**
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* MQTT 连接管理器
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* 负责连接/断连/消息接收/EventBus 分发
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*
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* 使用方式：HomeFragment 中 initDevicePrefs() 之后调用 connect()
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*
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* 消息处理：
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* 收到消息 → 解析 messageType → EventBus.emit(MqttMessageReceived)
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* 各业务模块通过 EventBus 订阅自己关心的 messageType
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*/
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@Singleton
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class MqttManager @Inject constructor(
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private val devicePrefs: DevicePrefs,
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private val eventBus: EventBus
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) {
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/** 协程作用域（用于发送 EventBus 事件） */
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private val scope = CoroutineScope(Dispatchers.Main + SupervisorJob())
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/** MQTT 异步客户端 */
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private var client: MqttAsyncClient? = null
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/** 是否已连接 */
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val isConnected: Boolean get() = client?.isConnected == true
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/**
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* 连接 MQTT Broker
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* 使用 DevicePrefs.imei 作为 clientId，TCP 协议连接
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*/
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fun connect() {
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val imei = devicePrefs.imei
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if (imei.isEmpty()) {
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Timber.w("MQTT: IMEI 为空，无法连接")
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return
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}
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// 已连接则跳过
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if (isConnected) {
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Timber.d("MQTT: 已连接，跳过")
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return
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}
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try {
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// 构建 TCP 连接地址
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val serverUri = "tcp://${EnvConfig.mqttHost}:${MqttConfig.PORT}"
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Timber.d("MQTT: 连接 $serverUri, clientId=$imei")
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// 创建客户端（使用内存持久化）
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client = MqttAsyncClient(serverUri, imei, MemoryPersistence()).apply {
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// 设置回调
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setCallback(mqttCallback)
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}
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// 构建连接选项
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val options = MqttConnectOptions().apply {
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userName = MqttConfig.USERNAME
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password = MqttConfig.PASSWORD.toCharArray()
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keepAliveInterval = MqttConfig.KEEP_ALIVE_INTERVAL
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connectionTimeout = MqttConfig.CONNECTION_TIMEOUT
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isAutomaticReconnect = MqttConfig.AUTO_RECONNECT
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isCleanSession = MqttConfig.CLEAN_SESSION
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}
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// 发起连接
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client?.connect(options, null, connectCallback)
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} catch (e: Exception) {
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Timber.e(e, "MQTT: 连接异常")
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}
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}
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/** 断开 MQTT 连接 */
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fun disconnect() {
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try {
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client?.disconnect()
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Timber.d("MQTT: 已断开")
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} catch (e: Exception) {
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Timber.w(e, "MQTT: 断开异常")
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}
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}
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/** 连接回调：成功后订阅 3 个 Topic */
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private val connectCallback = object : IMqttActionListener {
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override fun onSuccess(asyncActionToken: IMqttToken?) {
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Timber.d("MQTT: 连接成功")
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emitEvent(AppEvent.MqttConnected)
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subscribeTopics()
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}
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override fun onFailure(asyncActionToken: IMqttToken?, exception: Throwable?) {
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Timber.e(exception, "MQTT: 连接失败")
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}
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}
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/** 订阅 3 个 Topic */
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private fun subscribeTopics() {
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val imei = devicePrefs.imei
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try {
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// 设备专属 Topic（绑定/解绑/任务/工作状态等）
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client?.subscribe(imei, MqttConfig.QOS_DEVICE)
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Timber.d("MQTT: 订阅 Topic=$imei, QoS=${MqttConfig.QOS_DEVICE}")
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// 手表参数广播 Topic
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client?.subscribe(MqttConfig.TOPIC_WATCH_PARAMS, MqttConfig.QOS_BROADCAST)
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Timber.d("MQTT: 订阅 Topic=${MqttConfig.TOPIC_WATCH_PARAMS}")
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// 振动方案广播 Topic
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client?.subscribe(MqttConfig.TOPIC_SHOCK_PARAMS, MqttConfig.QOS_BROADCAST)
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Timber.d("MQTT: 订阅 Topic=${MqttConfig.TOPIC_SHOCK_PARAMS}")
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} catch (e: Exception) {
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Timber.e(e, "MQTT: 订阅异常")
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}
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}
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/** MQTT 消息回调 */
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private val mqttCallback = object : MqttCallbackExtended {
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/** 连接完成（包括自动重连后） */
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override fun connectComplete(reconnect: Boolean, serverURI: String?) {
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if (reconnect) {
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Timber.d("MQTT: 重连成功，重新订阅")
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subscribeTopics()
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emitEvent(AppEvent.MqttConnected)
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}
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}
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/** 连接丢失 */
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override fun connectionLost(cause: Throwable?) {
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Timber.w(cause, "MQTT: 连接丢失，等待自动重连")
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emitEvent(AppEvent.MqttDisconnected)
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}
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/** 收到消息 */
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override fun messageArrived(topic: String?, message: MqttMessage?) {
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try {
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val payload = message?.payload ?: return
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val json = String(payload)
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Timber.d("MQTT: 收到消息 topic=$topic, payload=$json")
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// 解析 messageType
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val jsonObj = JSONObject(json)
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val messageType = jsonObj.optInt("messageType", -1)
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if (messageType >= 0) {
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// 通过 EventBus 分发，业务模块各自订阅处理
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emitEvent(AppEvent.MqttMessageReceived(messageType, json))
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}
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} catch (e: Exception) {
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Timber.w(e, "MQTT: 消息解析异常")
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}
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}
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/** 消息发送完成（本项目不发消息，空实现） */
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override fun deliveryComplete(token: IMqttDeliveryToken?) {}
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}
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/** 通过 EventBus 发送事件 */
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private fun emitEvent(event: AppEvent) {
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scope.launch {
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eventBus.emit(event)
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}
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}
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}
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