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There are three ways to display your app in full screen on Android. The system bars are hidden and your activity continues to receive touch events. There is a person

The user can make the system bars visible again.

The options are described in the following way. To see the sample code, you have to enable full screen mode.

The mode is intended for full-screen experiences where users don't interact much with the screen.

All users have to do is press anywhere on the screen when they want the system bars to reappear.

To enable simplified mode, call setSystemUiVisibility.

When the system bars come back, you may receive a call to make otherUI updates. See how to respond to visibility changes.

Immersive mode is for apps where the user will interact a lot. There is a For example, playing games, viewing images in a gallery, or reading a book with pages.

When users want the system bars to show up, they move from edge to edge. The user's interaction with your app won't be interrupted by accidental taps or swipes, because the required gesture is more deliberate.

To enable immersive mode, call setSystemUiVisibility and pass the systemUIFLAGIMMERSIVE flag along with the systemUIFLAG FULLSCREEN and systemUIFLAG HIDE_NAVIGATION.

If your app has its own controls that are not needed when a user is immersed in the content, make them disappear and reappear along with the system bars.

There is a person Any app-specific gestures you have to hide and show are also recommended. The same thing should happen with system bars if a toolbar or palette appears or disappears when you tap on them.

When the system bars come back, you can receive a call to make otherUI updates.

How to respond to visibility changes is shown.

In regular surround mode, the system takes care of displaying the system bars when a user is near an edge.

Your app won't know that a gesture was made. If the user really needs to use a drawing app or use a lot of swiping to play a game, then you should enable it instead.

In fixed immersive mode, if the user touches the edge with a system bar, the system bars are semi- transparent, and the touch gesture is passed to the app so the app can respond to the gesture.

In a drawing app that uses this approach, if the user wants to draw a line at the edge of the screen, they can use their fingers to move the system bars from the edge to the edge. The bars disappear after a few seconds without interaction or as soon as the user taps or gestures outside of the system bars.

To enable sticky surround mode, call setSystemUiVisibility and pass the SYSTEM_UI_FLAG_IMMERSIVE_STICKY flag along with the SYSTEM_UI_FLAG_FULLSCREEN and SYSTEM_UI_FLAG_HIDE_NAVIGATION.

When system visibility changes, you can't receive a callback in fixed surround mode.

If you want immersive mode to be auto-hidden, but want to know when the system UI reappears in order to show your own UI controls, use the IMMERSIVE flag and Handler.postDelayed() or something similar to re-enter the system. surround mode after a few seconds.

If you want to use a fullscreen mode, you need to call setSystemUiVisibility and pass it to SYSTEM_UI_FLAG_HIDE_NAVIGATION.

You can either include SYSTEM_UI_FLAG_IMMERSIVE or exclude both to allow slant mode.

It is recommended to include other systemUI flags to prevent the layout from resizing when the system bars are hidden. The action bar should be hidden at the same time as the rest of the controls.