问题：我想在Dialog上显示此进度条,但Dialog始终显示在上面.这种情况可以做些什么？

public static void showProgressBar(@NonNull final Activity activity) {
    try {
        if (activity == null) {
            LogManager.printStackTrace(new NullActivityException());
            return;
        }
        View view = activity.findViewById(android.R.id.content);
        if (view == null) {
            LogManager.printStackTrace(new NullPointerException("content view is null"));
            return;
        }
        View rootView = activity.findViewById(android.R.id.content).getRootView();
        if (rootView == null || !(rootView instanceof ViewGroup)) {
            LogManager.printStackTrace(new NullPointerException("rootView is null or not an instance of ViewGroup"));
            return;
        }
        final ViewGroup layout = (ViewGroup) rootView;
 
        final ProgressBar progressBar = new ProgressBar(activity);
        progressBar.setIndeterminate(true);
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            Drawable wrapDrawable = DrawableCompat.wrap(progressBar.getIndeterminateDrawable());
            DrawableCompat.setTint(wrapDrawable,ContextCompat.getColor(activity,R.color.colorAccent));
            progressBar.setIndeterminateDrawable(DrawableCompat.unwrap(wrapDrawable));
        }
        RelativeLayout.LayoutParams params = new
                RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,RelativeLayout.LayoutParams.MATCH_PARENT);
        final RelativeLayout rl = new RelativeLayout(activity);
        rl.setBackgroundColor(ActivityCompat.getColor(activity,R.color.tc_hint_grey_alpha));
        rl.setClickable(true);
        rl.setTag("#$UniqueProgressBar");
        ViewGroup.LayoutParams params2 = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,120);
        rl.setGravity(Gravity.CENTER);
        rl.addView(progressBar,params2);
        LogManager.i("ProgressBar","ProgressUtils.showProgressBar->called");
        layout.addView(rl,params);
 
        mRunnable = new Runnable() {
            @Override
            public void run() {
                LogManager.i("ProgressBar","ProgressUtils.showProgressBar->120 secs timeout");
                hideProgressBar(activity);
            }
        };
        mHandler = new Handler();
        mHandler.postDelayed(mRunnable,120000);
 
        LogManager.i("ProgressBar","Added");
    } catch (Exception e) {
        LogManager.printStackTrace(e);
    }
 
}