How to set dialog on the top screen without activity or call from service - dialog

Question

For this question i want to share my task, very burnout task and new experiment for me,
I have more task And finnally code for test :
fun showAlertTest(){
val builder = AlertDialog.Builder(this)
builder.setTitle("This is Alert Dialog")
builder.setMessage("Bottom Alert dialog")
// set the neutral button to do some actions
// set the neutral button to do some actions
builder.setNeutralButton(
"DISMISS"
) { dialog, which ->
Toast.makeText(this, "Alert Dialog Dismissed", Toast.LENGTH_SHORT).show()
}
// set the positive button to do some actions
// set the positive button to do some actions
builder.setPositiveButton(
"OKAY"
) { dialog, which -> Toast.makeText(this, "OKAY", Toast.LENGTH_SHORT).show() }
// set the negative button to do some actions
// set the negative button to do some actions
builder.setNegativeButton(
"CANCEL"
) { dialog, which ->
Toast.makeText(this, "CANCEL", Toast.LENGTH_SHORT).show()
}
// show the alert dialog
// show the alert dialog
val alertDialog = builder.create()
// Set to TYPE_SYSTEM_ALERT so that the Service can display it
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
alertDialog.window!!.setType(WindowManager.LayoutParams.TYPE_TOAST);
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
alertDialog.window!!.setType(WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY);
}
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M)
{
alertDialog.window!!.setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
}
alertDialog.show()
}
NB : thanks a lot for this answer https://stackoverflow.com/a/48181241/8636506