"Context.startForegroundService() did not then call Service.startForeground()" 服务崩溃

Question

朋友们大家好。我在计步器服务的服务中使用这段代码，我会 遇到如下错误。感谢您的帮助。

*error android.app.RemoteServiceException: Context.startForegroundService() did not then call Service.startForeground() at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2220) at android.os.Handler.dispatchMessage(Handler.java:109) at android.os.Looper.loop(Looper.java:166) at android.app.ActivityThread.main(ActivityThread.java:7555) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:469) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:963)

class MyService : Service(), SensorEventListener {
private var sensorManager: SensorManager? = null
private var running = false
private var totalStep = 0f
private var previousTotalStep = 0f

override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
    try {
        running = true
        val stepSensor = sensorManager?.getDefaultSensor(Sensor.TYPE_STEP_COUNTER)
        sensorManager?.registerListener(this, stepSensor, SensorManager.SENSOR_DELAY_UI)
    } catch (e: Exception) {

    }
    return START_STICKY

}

override fun onBind(p0: Intent?): IBinder? {
    return null
}

override fun onSensorChanged(event: SensorEvent?) {
    if (running) {
        totalStep = event!!.values[0]
        val currentSteps = totalStep.toInt() - previousTotalStep.toInt()
        Constant.editor(this).putFloat(STEPNUMBER, previousTotalStep).apply()
    }
}

override fun onAccuracyChanged(p0: Sensor?, p1: Int) {

}

override fun stopService(name: Intent?): Boolean {
    return super.stopService(name)
}

override fun onDestroy() {
    val intent = Intent(this, MyPhoneReciver::class.java)
    sendBroadcast(intent)
    super.onDestroy()
}

}

Answer 1

这次崩溃的原因是：

-> 来自 Android 9 Pie 如果您的服务在使用命令 startForegroundService 启动后 5 秒内未调用 startForeground ... 那么它会产生 ANR + 崩溃。

解决方案：用startForegroundService启动服务后，在服务的onCreate方法中调用startForeground()

Answer 2

Android O你可以设置背景限制如下;

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        context!!.startForegroundService(Intent(context, MyService::class.java))
    } else {
        context!!.startService(Intent(context, MyService::class.java))
    }