直接在onCreate方法里面调用如下方法即可
protected void hideBottomUI() {int uiFlags = 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;if (android.os.Build.VERSION.SDK_INT >= 19) {uiFlags |= View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY;} else {uiFlags |= View.SYSTEM_UI_FLAG_LOW_PROFILE;}getWindow().getDecorView().setSystemUiVisibility(uiFlags);//解决虚拟按键弹出,无法再次隐藏的问题getWindow().getDecorView().setOnSystemUiVisibilityChangeListener((i) -> hideBottomUI());}