问不确定的水平ProgressBar低于ActionBar使用AppCompat？

EN

final LayoutParams lp = new LayoutParams(LayoutParams.MATCH_PARENT, 20); //Use dp resources


mLoadingProgressBar = new ProgressBar(this, null, android.R.attr.progressBarStyleHorizontal);
mLoadingProgressBar.setIndeterminate(true);
mLoadingProgressBar.setLayoutParams(lp);

final ViewGroup decor = (ViewGroup) getWindow().getDecorView();
decor.addView(mLoadingProgressBar);

final ViewTreeObserver vto = decor.getViewTreeObserver();
    vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

        final View content = getView(android.R.id.content);

        @Override
        public void onGlobalLayout() {
            int top = content.getTop();

            //Dont do anything until getTop has a value above 0.
            if (top == 0)
                return;

            //I use ActionBar Overlay in some Activities, 
            //in those cases it's size has to be accounted for
            //Otherwise the progressbar will show up at the top of it
            //rather than under. 

            if (getSherlock().hasFeature((int) Window.FEATURE_ACTION_BAR_OVERLAY)) {
                top += getSupportActionBar().getHeight();
            }

            //Remove the listener, we dont need it anymore.
            Utils.removeOnGlobalLayoutListener(decor, this);

            //View.setY() if you're using API 11+, 
            //I use NineOldAndroids to support older 
            ViewHelper.setY(mLoadingProgressBar, top);
        }
    });