/**
 * Clear focus on touch outside for all EditText inputs.
 */
override fun dispatchTouchEvent(event: MotionEvent): Boolean {
    if (event.action == MotionEvent.ACTION_DOWN) {
        val v = currentFocus
        if (v is EditText) {
            val outRect = Rect()
            v.getGlobalVisibleRect(outRect)
            if (!outRect.contains(event.rawX.toInt(), event.rawY.toInt())) {
                v.clearFocus()
                val imm: InputMethodManager =
                    getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
                imm.hideSoftInputFromWindow(v.getWindowToken(), 0)
                // hide your button
            }
        }
    }
    return super.dispatchTouchEvent(event)
}