fix: 息屏后MQTT断连导致无法收到通知

添加前台服务+WakeLock保活MQTT连接，请求电池优化白名单绕过Doze限制， AlarmManager每5分钟健康检查断连自动重连。 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-05-09 13:10:04 +09:30
parent 966c9f9c0d
commit b867c33015
6 changed files with 301 additions and 5 deletions
--- a/app/src/main/java/com/xiaoqu/watch/service/MqttAlarmReceiver.kt
+++ b/app/src/main/java/com/xiaoqu/watch/service/MqttAlarmReceiver.kt
@@ -0,0 +1,85 @@
+package com.xiaoqu.watch.service
+
+import android.app.AlarmManager
+import android.app.PendingIntent
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.os.Build
+import android.os.SystemClock
+import com.xiaoqu.watch.service.manager.MqttManager
+import dagger.hilt.android.AndroidEntryPoint
+import timber.log.Timber
+import javax.inject.Inject
+
+/**
+ * MQTT 连接健康检查广播接收器
+ *
+ * 通过 AlarmManager.setExactAndAllowWhileIdle() 定期触发，
+ * 在 Doze 模式的维护窗口中检查 MQTT 连接状态，断连则重连。
+ * 同时确保 MqttService 前台服务存活。
+ */
+@AndroidEntryPoint
+class MqttAlarmReceiver : BroadcastReceiver() {
+
+    companion object {
+        /** 检查间隔：5 分钟（Doze 维护窗口至少 10 分钟，5 分钟能抓到窗口期） */
+        private const val CHECK_INTERVAL_MS = 5 * 60 * 1000L
+
+        /** 启动定时健康检查 */
+        fun schedule(context: Context) {
+            val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
+            val intent = Intent(context, MqttAlarmReceiver::class.java)
+            val pendingIntent = PendingIntent.getBroadcast(
+                context, 0, intent,
+                PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+            )
+
+            // setExactAndAllowWhileIdle: Doze 模式下也能触发
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                alarmManager.setExactAndAllowWhileIdle(
+                    AlarmManager.ELAPSED_REALTIME_WAKEUP,
+                    SystemClock.elapsedRealtime() + CHECK_INTERVAL_MS,
+                    pendingIntent
+                )
+            } else {
+                alarmManager.setExact(
+                    AlarmManager.ELAPSED_REALTIME_WAKEUP,
+                    SystemClock.elapsedRealtime() + CHECK_INTERVAL_MS,
+                    pendingIntent
+                )
+            }
+            Timber.d("MqttAlarm: 已设置 ${CHECK_INTERVAL_MS / 1000}s 后检查")
+        }
+
+        /** 取消定时检查 */
+        fun cancel(context: Context) {
+            val alarmManager = context.getSystemService(Context.ALARM_SERVICE) as AlarmManager
+            val intent = Intent(context, MqttAlarmReceiver::class.java)
+            val pendingIntent = PendingIntent.getBroadcast(
+                context, 0, intent,
+                PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
+            )
+            alarmManager.cancel(pendingIntent)
+            Timber.d("MqttAlarm: 已取消定时检查")
+        }
+    }
+
+    @Inject lateinit var mqttManager: MqttManager
+
+    override fun onReceive(context: Context, intent: Intent) {
+        Timber.d("MqttAlarm: 健康检查触发, isConnected=${mqttManager.isConnected}")
+
+        // 确保前台服务在运行
+        MqttService.start(context)
+
+        // MQTT 断连则重连
+        if (!mqttManager.isConnected) {
+            Timber.w("MqttAlarm: 连接已断开，触发重连")
+            mqttManager.connect()
+        }
+
+        // 重新设置下一次闹钟（setExactAndAllowWhileIdle 是一次性的）
+        schedule(context)
+    }
+}