前台服务被奥利奥杀死 [英] Foreground service getting killed from Oreo

查看：40 发布时间：2021/11/27 21:32:45 android android-service android-source

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问题描述

我编写了一个前台服务，该服务适用于低于 Oreo 的所有操作系统版本.从 Oreo 应用程序关闭并从最近的应用程序中删除 5 分钟后被终止.

I have written a foreground service which is working properly for all OS version lower than Oreo. From Oreo application process is getting killed after 5 minutes of closing and removing the application from recents.

根据后台执行限制的 android 开发者文档，操作系统不应终止正在运行前台服务且通知显示在通知窗口中的应用程序.

As per android developer documentation for background execution limitations OS should not kill application for which a foreground service is running and notification is shown in notification window.

根据开发者文档指南.我按照以下步骤启动前台服务.

As per guidelines on developer documentation. I followed below steps to start foreground-service.

前台服务通过startForegroundService()方法启动
在启动服务后 5 秒内，使用 startForeground()
从service

onStartCommand()

START_STICKY

我在以下手机上遇到了这个问题:

I am facing this issue on following phones:

一加 5T
体内
OPPO
米

我试图防止前台服务被破坏的方法是什么?

What I tried to prevent foreground-service from being destroyed?

禁用电池优化通过展示申请系统对话框给用户以禁用打盹模式.

Disable the battery optimization for the application by showing system dialog to user to disable doze mode.

我试图重新启动前台服务?

What I tried to restart the foreground-service?

使用 AlarmManager 从 onTaskRemoved() 重新启动服务.请查看此链接了解详情.

Used AlarmManager to restart the service from onTaskRemoved(). Please check this link for details.

据我了解，这些制造商定制了 AOSP，并且不遵守允许前台服务运行的操作系统准则.可能这些制造商这样做是因为为用户提供了较长的电池寿命.

As per my understanding these manufacturers have customized the AOSP and are not respecting the OS guidelines for allowing foreground service to run. May be these manufacturers have done this because of giving long battery life time to users.

前台服务类

    class DataCaptureService : Service() {

        private var isServiceStarted = false

        override fun onBind(intent: Intent?): IBinder? {
            return null
        }

override fun onCreate() {
        super.onCreate()
        wakeLock = (getSystemService(Context.POWER_SERVICE) as PowerManager).run {
                    newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "WakelockTag123").apply {
                        acquire()
                    }
                }
    }


        override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
            val serviceAction = intent?.action
            LogUtils.logD("OnStartCommand(). Action=$serviceAction")
            if (Constants.INTENT.ACTION_STOP_SERVICE == serviceAction) {
                LogUtils.logD("Stopping data capture service")
                stopForeground(true)
                stopSelf()
            } else if (Constants.INTENT.ACTION_START_SERVICE == serviceAction && !isServiceStarted) {
                LogUtils.logD("Starting data capture service")
                isServiceStarted = true
                // Here showing notification using a utility method (startForeground(id, notification))
                createNotification(this)
                // Doing some stuff here
                ----------------------
                //
            }
            return START_STICKY
        }

        override fun onDestroy() {
            super.onDestroy()
            if (isServiceStarted) {
                LogUtils.logD("onDestroy of DataCaptureService method is invoked")
                // Doing some stuff here
                ----------------------
                //
                isServiceStarted = false
                if (wakeLock.isHeld) {
                    wakeLock.release()
                }
            }
        }

        override fun onTaskRemoved(rootIntent: Intent?) {
            LogUtils.logD("onTaskRemoved of DataCaptureService method is invoked")
            ensureServiceStaysRunning()
            super.onTaskRemoved(rootIntent)
        }

        private fun ensureServiceStaysRunning() {
            val restartAlarmInterval = 60 * 1000
            val resetAlarmTimer = 30 * 1000L
            // From this broadcast I am restarting the service
            val restartIntent = Intent(this, ServiceRestartBroadcast::class.java)
            restartIntent.action = "RestartedViaAlarm"
            restartIntent.flags = Intent.FLAG_RECEIVER_FOREGROUND
            val alarmMgr = getSystemService(Context.ALARM_SERVICE) as AlarmManager
            val restartServiceHandler = @SuppressLint("HandlerLeak")
            object : Handler() {
                override fun handleMessage(msg: Message) {
                    val pendingIntent = PendingIntent.getBroadcast(applicationContext, 87, restartIntent, PendingIntent.FLAG_CANCEL_CURRENT)
                    val timer = System.currentTimeMillis() + restartAlarmInterval
                    val sdkInt = Build.VERSION.SDK_INT
                    if (sdkInt < Build.VERSION_CODES.KITKAT)
                        alarmMgr.set(AlarmManager.RTC_WAKEUP, timer, pendingIntent)
                    else if (Build.VERSION_CODES.KITKAT <= sdkInt && sdkInt < Build.VERSION_CODES.M)
                        alarmMgr.setExact(AlarmManager.RTC_WAKEUP, timer, pendingIntent)
                    else if (sdkInt >= Build.VERSION_CODES.M) {
                        alarmMgr.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, timer, pendingIntent)
                    }
                    sendEmptyMessageDelayed(0, resetAlarmTimer)
                    stopSelf()
                }
            }
            restartServiceHandler.sendEmptyMessageDelayed(0, 0)
        }

    }

如果您遇到过类似的问题并设法找到解决方案，请分享您的建议.

Please share your suggestion if you have faced similar type of issue and managed to find a solution for this.

前台服务被奥利奥杀死 [英] Foreground service getting killed from Oreo

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前台服务被奥利奥杀死 [英] Foreground service getting killed from Oreo

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