[Android]Keybard Show/Hide 감지하기

activity root View에 대해 리스너를 겁니다.

 

 rootView.viewTreeObserver.addOnGlobalLayoutListener {
            val rec = Rect()
            rootView.getWindowVisibleDisplayFrame(rec)

            //finding screen height
            val screenHeight = rootView.rootView.height

            //finding keyboard height
            val keypadHeight = screenHeight - rec.bottom

            keymode = if (keypadHeight > screenHeight * 0.15) {
                Toast.makeText(this@MemoActivity, "VISIBLE KEYBOARD", Toast.LENGTH_LONG).show()
                KeyboardMode.SHOW
            } else {
                Toast.makeText(this@MemoActivity, "NO KEYBOARD", Toast.LENGTH_LONG).show()
                KeyboardMode.HIDE
            }
        }