Can you detect whether an application is in immersive mode in Fragment.onCreateView?

Question

In a fragment I have implemented a GestureDetector.SimpleOnGestureListener so that I can enter/exit immersive mode when onSingleTapUp is detected.

A FragmentStatePagerAdapter is used to move between these fragments on swipe left/right. If you enter immersive mode then swipe to a new fragment the UI remains in immersive mode.

However, in the onCreateView method of the new fragment I need to detect whether the UI is in immersive mode to when creating my listener.

I have tried calling getSystemUiVisibility() on the new view but this returns SYSTEM_UI_FLAG_VISIBLE.

Is there a method for detecting whether the application is in immersive mode from any view or fragment regardless of whether that initiated the transition to immersive mode?

Answer 1

If anyone is looking for a more in-depth answer. To check if the window is in immersive vs non-immersive you can do something use:

(getWindow().getDecorView().getSystemUiVisibility() & View.SYSTEM_UI_FLAG_IMMERSIVE) == View.SYSTEM_UI_FLAG_IMMERSIVE

An example of it's usage for swapping between immersive and normal:

private void toggleImmersive() {
    if ((getWindow().getDecorView().getSystemUiVisibility() & View.SYSTEM_UI_FLAG_IMMERSIVE) == View.SYSTEM_UI_FLAG_IMMERSIVE) {
        getWindow().getDecorView().setSystemUiVisibility( // Go fullscreen
                View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
    } else {
        getWindow().getDecorView().setSystemUiVisibility( // Go immersive
                View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                        | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                        | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                        | View.SYSTEM_UI_FLAG_FULLSCREEN
                        | View.SYSTEM_UI_FLAG_IMMERSIVE);
    }
}

Answer 2

@Mark, it sounds like you may have gotten it resolved based on my previous comment: use a View owned by the Activity to call getSystemUiVisibility() rather than the Fragment.