回想一下我的问题，我想添加我正在使用的解决方案，自那以后我一直没有失败，我不记得是否我在其他地方看到了它，或者我亲自来到了它，但我很高兴它能起作用.

Looking back on my question, I'd like to add the solution I'm using now which hasn't failed me since, I don't remember if I saw it somewhere else or came to it myself but I'm glad it works.

public static void activiateFullscreen(Activity activity){
    View decorView = activity.getWindow().getDecorView();
    int uiOptions = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
    if (Build.VERSION.SDK_INT >= 17) {
        uiOptions ^= View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                | View.SYSTEM_UI_FLAG_FULLSCREEN
                |View.SYSTEM_UI_FLAG_LOW_PROFILE;
    }
    if (Build.VERSION.SDK_INT >= 19) {
        uiOptions ^= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;
    }
    decorView.setSystemUiVisibility(uiOptions);
}

希望这对某人有帮助！