当应用程序在Android Pie上受到后台限制时启动前台服务

RemoteserviceException: Context.startForegroundservice() did not then call service.startForeground()

我们在启动的服务中调用startForeground(),但尝试启动服务时的系统日志显示：

system_process W/Activitymanager: service.startForeground() not allowed due to bg reStriction

当你跟踪the documented steps的前台服务时,看起来很奇怪,并且当你的应用程序也在前台时,系统拒绝启动前台服务的应用程序.我还没有找到与此相关的大量文档,但这是记录在案的行为吗？您的应用程序是否至少有一种方法可以知道它是否受到后台限制,因此不会尝试在前台启动服务？

我的服务代码基本上如下所示.我们的目标api是27.

class Myservice : service() {

    override fun onCreate() {
        super.onCreate()
        // create notification
        startForeground(NOTIFICATION_ID,notification)
    }

    override fun onStartCommand(intent: Intent?,flags: Int,startId: int): Int {
        if (intent == null || intent.action == null || intent.action == ACTION_STOp) {
            quit()
        }
        doWork()
        return START_NOT_STICKY
    }

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

    override fun onTaskRemoved(rooTintent: Intent?) {
        super.onTaskRemoved(rooTintent)
        quit()
    }

    private fun quit() {
        stopForeground(true)
        stopSelf()
    }

    companion object {

        fun start(context: Context) {
            val intent = Intent(context,Myservice::class.java)
            intent.action = ACTION_START
            ContextCompat.startForegroundservice(context,intent)
        }

        fun stop(context: Context) {
            val intent = Intent(context,Myservice::class.java)
            intent.action = ACTION_STOP
            ContextCompat.startForegroundservice(context,intent)
        }
    }
}