Immersive Mode showing blank space

Question

I\'m trying to implement a fullscreen mode, but for Android 4.4 and up, it shows a blank space there:

BEFORE immersive mode(fullscreen)

Answer 1

Try this:

override fun onActivityCreated(savedInstanceState: Bundle?) {
    super.onActivityCreated(savedInstanceState)
    var viewParent = view
    while (viewParent is View) {
        viewParent.fitsSystemWindows = false
        viewParent.setOnApplyWindowInsetsListener { _, insets -> insets }
        viewParent = viewParent.parent as View?
    }
}

What does this do? DialogFragment#onActivityCreated() calls Dialog#setContentView(), which wraps the Dialog's view in a private 'wrapInBottomSheet'. In order to set the proper flags of those wrapper views, we want to set the flags after they are wrapped, e.g. after super.onActivityCreated()

Also watch this talk for info on fitsSystemWindows and window insets.