addFlooat.kt

    private fun addFloatingMenu() {
        if (floatingControlView?.parent == null) {
        //Set layout params to display the controls over any screen.
        val params = WindowManager.LayoutParams(
            WindowManager.LayoutParams.WRAP_CONTENT,
            WindowManager.LayoutParams.WRAP_CONTENT,
            if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) WindowManager.LayoutParams.TYPE_PHONE else WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
            PixelFormat.TRANSLUCENT
        )
        params.height = dpToPx(50)
        params.width =  dpToPx(50)
        iconWidth = params.width
        iconHeight = params.height
        screenHeight = windowManager?.defaultDisplay?.height?:0
        screenWidth = windowManager?.defaultDisplay?.width?:0
        //Initial position of the floating controls. We can customize things here
        params.gravity = Gravity.TOP or Gravity.START
        params.x = 0
        params.y = 100

        //Add the view to window manager
        windowManager?.addView(floatingControlView, params)
     }
  }