android 導航鍵和導航欄的顯示隱藏

//導航鍵和導航欄的隱藏 
private void hideSystemUI() {
    getWindow().getDecorView()
            .setSystemUiVisibility(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 | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);

}

//導航鍵和導航欄的隱藏 
private void showSystemUI() {
    getWindow().getDecorView()
            .setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
                    | View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION)

}