Detecting if the Android keyboard is visible or hidden without @composable

isSoftInputVisible.kt

// copy and change from https://github.com/Blankj/AndroidUtilCode/blob/master/lib/utilcode/src/main/java/com/blankj/utilcode/util/KeyboardUtils.java#L185C1-L207C6
private var sDecorViewDelta = 0
fun isSoftInputVisible(activity: Activity): Boolean {
	val window = activity.window
	val decorView = window.decorView
	val outRect = Rect()
	decorView.getWindowVisibleDisplayFrame(outRect)
	val delta = Math.abs(decorView.bottom - outRect.bottom)
	var NavBarHeight = 0
	val res = activity.application.resources
	val resId1 = res.getIdentifier("navigation_bar_height", "dimen", "android")
	if (resId1!=0){
		NavBarHeight = res.getDimensionPixelSize(resId1)
	}
	var StatusBarHeight = 0
	val resId2 = res.getIdentifier("status_bar_height", "dimen", "android")
	if (resId2!=0){
		StatusBarHeight = res.getDimensionPixelSize(resId2)
	}
	if (delta <= NavBarHeight + StatusBarHeight) {
		sDecorViewDelta = delta
		return false
	}
	return (delta - sDecorViewDelta)>0
}