How to disable statusbar and navigationbar animation when activating/deactivating full-screen mode in Android

Question

Problem

Activating and Deactivating (immersive) full-screen mode causes that the statusbar but also navigation bar "fades" in and out. The animation seem to differ across different devices and I would like to disable the animation completely. My minimum target SDK is 19; however, I would also be happy with a solution that requires a higher API level. Please see below for further details.

Running demo

I implemented a (minimal) demo so that people can test things easily. Everything is available on GitHub:

• https://github.com/sztyler/android-fullscreendemo

For clarification, I am using setSystemUiVisibility(FLAGS) to activate/deactivate the full screen mode. Further, I am using the following flags:

Activating full-screen mode:

int visibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                   | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                   | View.SYSTEM_UI_FLAG_FULLSCREEN
                   | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
mainView.setSystemUiVisibility(visibility);

Deactivating full-screen mode:

int visibility = View.SYSTEM_UI_FLAG_VISIBLE;
mainView.setSystemUiVisibility(visibility);

What I tried

I already tried many different things and did a lot of research. In the following, I want summaries the main approaches which I already tried.

1. Instead of using setSystemUiVisibility (which seems to be recommended) a lot of people recommend to use getWindow().setFlags to change flags. However, setting the Flags in a different way does not seem to have an effect. I also assume that this is outdated.

• how to remove statusbar animation when changing to fullscreen in Android
• Hide and show statusBar with Toolbar at the same time in android
• Android: Disable and enable to pulling the status bar programmatically for API 19
• hide and show statusbar without any effect to layout in android
• Android: show/hide status bar/power bar

2. It seems to be possible to exclude the status bar and navigation bar from the exit/enter fade transition when switching between activities. However, this does not seem to have any effect on activating/deactivating full-screen mode.

• How do I prevent the status bar and navigation bar from animating during an activity scene animation transition?

3. Some people just recommend different flags (just in general to hide the bars) -but the animation stays the same.

   View.setSystemUiVisibility(View.STATUS_BAR_HIDDEN);

• Android: Ability to Auto-Hide the Title/Status Bars?

4. Some people highlight that it is possible to override the subsequent animation with overridePendingTransition(0, 0) but this does not seem so work in this case.

• Is there any way to remove notification/status bar, but not in onCreate?

How the animation can look like

Just to clarify what I mean. In the following, there are gif animations which show the status/navigation bar animation (Sorry I don't have the permission to embed images)

Android 8.0 / Huawei / There is no fade out animation (both bars just vanish as required but there is a fade in animation). Both statusbar and navigationbar "flash in".

• Statusbar Animation
• Navigationbar Animation

Android 5.0 / Samsung / There is a fade in and fade out animation (There is no navigationbar).

• Statusbar Animation

(The behavior of the actionbar is as expected.)