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Get Android's screen width and height

Inside your Activity:

override fun onStart() {
    val size = Point()
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.R) {
    } else {
        val windowManager = requireContext().getSystemService(Context.WINDOW_SERVICE) as WindowManager
    size.x // Width
    size.y // Height
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