电源信息监控

Posted 2022-05-06 rchao

定义接受电源信息的BroadCastReceiver

private val batteryBroadcastReceiver = object :BroadcastReceiver()
        override fun onReceive(p0: Context?, p1: Intent?) 
            when(p1?.getIntExtra(BatteryManager.EXTRA_STATUS,BatteryManager.BATTERY_HEALTH_UNKNOWN))
                BatteryManager.BATTERY_STATUS_CHARGING -> 
                    //充电中
                

                BatteryManager.BATTERY_STATUS_FULL -> 
                    //已充满
                

                else -> 
                    val level = p1?.getIntExtra(BatteryManager.EXTRA_LEVEL,0)//当前电量
                    val scale = p1?.getIntExtra(BatteryManager.EXTRA_SCALE,0)//总电量
                    val percentage = (level?.toFloat()!! * 100 / scale?.toFloat()!!).toInt()
                    
                
            
        
    

注册和销毁

context.registerReceiver(batteryBroadcastReceiver, IntentFilter(Intent.ACTION_BATTERY_CHANGED))


context.unregisterReceiver(batteryBroadcastReceiver)