Detect Soft Keyboard

DetectSoftKeyboardExample.kt

fun Activity.handleKeyboardVisibility(isInitialKeyboardVisible: Boolean = true, onOpen: () -> Unit, onClose: () -> Unit) {
    var isKeyboardVisible = isInitialKeyboardVisible
    val listener = OnGlobalLayoutListener {
        window.decorView.apply {
            val r = Rect()
            getWindowVisibleDisplayFrame(r)
            val isKeyboardCurrentlyVisible = height - r.bottom > height * 0.1399

            if (!isKeyboardVisible && isKeyboardCurrentlyVisible) {
                // Keyboard is open
                isKeyboardVisible = true
                onOpen()
            } else if (isKeyboardVisible && !isKeyboardCurrentlyVisible) {
                // Keyboard is closed
                isKeyboardVisible = false
                onClose()
            }
        }
    }

    (this as LifecycleOwner).lifecycle.addObserver(object : DefaultLifecycleObserver {
        override fun onStart(owner: LifecycleOwner) {
            super.onStart(owner)
            this@handleKeyboardVisibility.window.decorView.viewTreeObserver.addOnGlobalLayoutListener(listener)
        }

        override fun onStop(owner: LifecycleOwner) {
            super.onStop(owner)
            this@handleKeyboardVisibility.window.decorView.viewTreeObserver.removeOnGlobalLayoutListener(listener)
        }
    })
}