在全屏DialogFragment中设置自定义主题

<style name="FullScreenDialogTheme" parent="Theme.AppCompat.Light.Dialog">
    <item name="android:windowIsFloating">false</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowFullscreen">true</item>
    <item name="android:windowContentOverlay">@null</item>
</style>

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setStyle(DialogFragment.STYLE_NORMAL, R.style.FullScreenDialogTheme);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_full_screen_dialog, container, false);
    // 在这里可以对布局进行进一步的操作和设置
    return view;
}

FullScreenDialogFragment dialogFragment = new FullScreenDialogFragment();
dialogFragment.show(getSupportFragmentManager(), "FullScreenDialogFragment");