当电池电量不足时连接设备当我连接设备时自动从活动中关闭警报对话框

Question

这是我在 mainactivity.kt 文件中的广播接收器乐趣

私有 val mPlugInReceiver = 对象：BroadcastReceiver() { 覆盖 fun onReceive(context: Context, intent: Intent) {

        val bm = context.getSystemService(Application.BATTERY_SERVICE) as BatteryManager
        val batLevel:Int = bm.getIntProperty(BatteryManager.BATTERY_PROPERTY_CAPACITY)
        System.out.println("integerBatteryLevel ===="+batLevel)

        if(batLevel < 20){
            System.out.println("this is low battaroy below 20 % ===="+batLevel)
        }else
        {
            System.out.println("this is nice  battaroy more than 20 % ===="+batLevel)
        }
        when (intent.action) {

            Intent.ACTION_POWER_CONNECTED -> {

                Toast.makeText(context, "Power connected", Toast.LENGTH_SHORT).show()
                openDialogForBatteryStatus(false)
            }
            Intent.ACTION_POWER_DISCONNECTED -> {
                if(batLevel > 20){
                    openDialogForBatteryStatus(false)
                }else
                {
                    Toast.makeText(context, "Power disconnected", Toast.LENGTH_SHORT).show()
                    openDialogForBatteryStatus(true)

                }          
            }
        }
    }
}

Answer 1

打开类 BaseActivity : AppCompatActivity() {

fun openDialogForBatteryLevel(){

    val dialogView = layoutInflater.inflate(R.layout.dialog_battery_low, null)

    val dialog = AlertDialog.Builder(this@BaseActivity)
        .setView(dialogView).setCancelable(false)
        .show()

    dialogView.txtViewDescription.text = "Your Phone Battery is low"

    dialogView.txtViewOk.setOnClickListener{
        this.finishAffinity()
    }

    dialog.window!!.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
    dialogView.txtViewOk.setOnClickListener {
        dialog.dismiss()
    }
}

fun openDialogForBatteryStatus(){
    val dialogView = layoutInflater.inflate(R.layout.dialog_battery_low, null)

    val dialog = AlertDialog.Builder(this@BaseActivity)
            .setView(dialogView).setCancelable(false)
            .show()

    dialogView.txtViewDescription.text = "Please Remove charger"

    dialogView.txtViewOk.setOnClickListener{
        this.finishAffinity()

    }
    dialog.window!!.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
    dialogView.txtViewOk.setOnClickListener {
        dialog.dismiss()
    }

}

}

Answer 2

我再次更改了我的 BaseActivity，它在代码中显示了一些红线

fun openDialogForBatteryLevel(show: Boolean, message : String): AlertDialog{

val dialog
val dialogView


var d

if(alertD == null){
dialog = AlertDialog.Builder(this@BaseActivity)
dialogView = layoutInflater.inflate(R.layout.dialog_battery_low, null)
dialog.setView(dialogView).setCancelable(false)
d = dialog.create()
}else{
d = alertD
}

if(show){
if(d.isShowing)
d.show()
}else{
d.dismiss()
}

dialogView.txtViewDescription.text = message

dialogView.txtViewOk.setOnClickListener{
this.finishAffinity()
}

d.window!!.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))

return d
}

Answer 3

您所做的是每次调用 openDialogForBatteryLevel() 方法时创建新对话框，并且每次尝试关闭对话框时都会关闭对话框的新对象，而不是附加到窗口的对象。您应该全局持有对象（最好是对象的弱引用）并仅在未初始化时才对其进行初始化并对其进行操作。

Answer 4

这是我的 BaseActivity 调用警报对话框

open class BaseActivity : AppCompatActivity() {

    fun openDialogForBatteryLevel(show: Boolean){
        val dialogView = layoutInflater.inflate(R.layout.dialog_battery_low, null)

        val dialog = AlertDialog.Builder(this@BaseActivity)
        dialog.setView(dialogView).setCancelable(false)

        val d= dialog.create()

        if(show){
            if(d.isShowing)
                d.show()
        }else{
            d.dismiss()
        }

        dialogView.txtViewDescription.text = "Your Phone Battery is low"

        dialogView.txtViewOk.setOnClickListener{
            this.finishAffinity()
        }

        d.window!!.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
    }

    fun openDialogForBatteryStatus(show: Boolean) {
        val dialogView = layoutInflater.inflate(R.layout.dialog_battery_low, null)

        val dialog = AlertDialog.Builder(this@BaseActivity)
        dialog.setView(dialogView).setCancelable(false)
        val d= dialog.create()
        if(show){
            if(d.isShowing)
                d.show()
        }else{
            d.dismiss()
        }
        dialogView.txtViewDescription.text = "Please Remove charger"

        dialogView.txtViewOk.setOnClickListener{
            this.finishAffinity()

        }

        d.window!!.setBackgroundDrawable(ColorDrawable(Color.TRANSPARENT))
    }


}