为什么我的DialogFragment在安卓11中没有全屏显示？

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_fullscreen_dialog, container, false);
    
    // 设置全屏窗口属性
    if (getDialog() != null && getDialog().getWindow() != null) {
        Window window = getDialog().getWindow();
        window.setLayout(ViewGroup.LayoutParams.MATCH_PARENT,
                         ViewGroup.LayoutParams.MATCH_PARENT);
        window.setFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
                        WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
    }
    
    return view;
}

<style name="FullScreenDialog" parent="Theme.MaterialComponents.Light.Dialog.Alert">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowIsFloating">false</item>
</style>

setStyle(DialogFragment.STYLE_NORMAL, R.style.FullScreenDialog);

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@android:color/white">

    <!-- 你的布局内容 -->

</LinearLayout>

if (getDialog() != null && getDialog().getWindow() != null) {
    Window window = getDialog().getWindow();
    window.setFlags(
        WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
        WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
    );
}

@Override
public void onStart() {
    super.onStart();
    if (getDialog() != null && getDialog().getWindow() != null) {
        Window window = getDialog().getWindow();
        window.setLayout(ViewGroup.LayoutParams.MATCH_PARENT,
                         ViewGroup.LayoutParams.MATCH_PARENT);
        window.setGravity(Gravity.CENTER);
    }
}