华为，荣誉手机电池优化，前台服务

Question

这个问题可能看起来很宽泛，但我会尽量简短地总结一下。

如何在ANDROID o中处理后台服务？

如何在华为设备上关闭电池优化

如何在华为设备上关闭电池优化

华为EMUI 4.0+上的电池优化（wakelocks）

当应用程序在华为设备上消失时，服务被扼杀

Oreo（8.1）无法在锁定屏幕上启动活动

package com.demo.forgroundservicedemo

import android.content.Intent
import android.os.IBinder
import androidx.core.app.NotificationCompat
import android.os.Build
import android.app.*
import android.app.NotificationManager
import android.app.NotificationChannel
import android.content.BroadcastReceiver
import android.content.Context
import android.content.IntentFilter
import android.graphics.Color
import android.util.Log
import androidx.annotation.RequiresApi
import android.os.SystemClock
import android.app.AlarmManager
import android.app.PendingIntent
import android.widget.Toast


class ForegroundService : Service() {

    override fun onCreate() {
        Log.e("ForegroundService", "onCreate called")
        super.onCreate()
    }

@RequiresApi(Build.VERSION_CODES.O)
private fun startMyOwnForeground() {
    val NOTIFICATION_CHANNEL_ID = CONST.CHANNELID
    val channelName = CONST.channelName
    val chan = NotificationChannel(
        NOTIFICATION_CHANNEL_ID,
        channelName,
        NotificationManager.IMPORTANCE_NONE
    )
    chan.lightColor = Color.BLUE
    chan.lockscreenVisibility = Notification.VISIBILITY_PRIVATE
    val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
    manager.createNotificationChannel(chan)

    val notificationIntent = Intent(this, MainActivity::class.java)

    notificationIntent.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_SINGLE_TOP

    val intent = PendingIntent.getActivity(
        this, 0,
        notificationIntent, 0
    )

    val notificationBuilder = NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
    notificationBuilder.setContentIntent(intent)
    val notification = notificationBuilder.setOngoing(true)
        .setSmallIcon(R.mipmap.ic_launcher)
        .setContentTitle(CONST.serviceTitle)
        .setPriority(NotificationManager.IMPORTANCE_MIN)
        .setCategory(Notification.CATEGORY_SERVICE)
        .setAutoCancel(false)
        .build()

    notification.flags = notification.flags or Notification.FLAG_AUTO_CANCEL
    startForeground(2, notification)
}

override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {

    Log.e("ForegroundService", "onStartCommand called")
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        Log.e("SDK_INT", ">= Build.VERSION_CODES.O")
        startMyOwnForeground()
    } else {
        startForeground(1, Notification())
    }

    registerBroadcastReceiver()
    return START_STICKY
}

override fun onDestroy() {
    Log.e("ForegroundService", "onDestroy called")
    super.onDestroy()
}

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

private var mPowerKeyReceiver: BroadcastReceiver? = null

private fun registerBroadcastReceiver() {

    Log.e("registerBroadcast", "called")
    val theFilter = IntentFilter()
    /** System Defined Broadcast  */
    theFilter.addAction(Intent.ACTION_SCREEN_ON)
    //theFilter.addAction(Intent.ACTION_SCREEN_OFF)

    mPowerKeyReceiver = object : BroadcastReceiver() {
        override fun onReceive(context: Context?, intent: Intent?) {

            Log.e("onReceive", "onReceive called")
            val strAction = intent!!.action

            if (strAction == Intent.ACTION_SCREEN_ON) {
                Toast.makeText(context, "SCREEN ON", Toast.LENGTH_LONG).show()
            }
        }
    }

    applicationContext.registerReceiver(mPowerKeyReceiver, theFilter)
}

private fun unregisterReceiver() {
    val apiLevel = Build.VERSION.SDK_INT

    if (apiLevel >= 7) {
        try {
            applicationContext.unregisterReceiver(mPowerKeyReceiver)
        } catch (e: IllegalArgumentException) {
            mPowerKeyReceiver = null
        }

    } else {
        applicationContext.unregisterReceiver(mPowerKeyReceiver)
        mPowerKeyReceiver = null
    }
}

override fun onTaskRemoved(rootIntent: Intent?) {
    super.onTaskRemoved(rootIntent)
    Log.e("onTaskRemoved", "onTaskRemoved called")
    unregisterReceiver()

    val restartService = Intent(
        applicationContext,
        this.javaClass
    )
    restartService.setPackage(packageName)
    val restartServicePI = PendingIntent.getService(
        applicationContext, 1, restartService,
        PendingIntent.FLAG_ONE_SHOT
    )
    val alarmService =
        applicationContext.getSystemService(Context.ALARM_SERVICE) as AlarmManager
    alarmService.setExactAndAllowWhileIdle(
        AlarmManager.ELAPSED_REALTIME,
        SystemClock.elapsedRealtime() + 500,
        restartServicePI
    )
}
}

Answer 1

也许问题是您在调度警报时没有setrepeating？

我基本上在做同样的事情（当屏幕打开时更新小部件），我是这样做的：

alarmManager.setRepeating(AlarmManager.RTC, System.currentTimeMillis() + 1000, interval, pendingIntent)