RecyclerViewFragment.java 文件源码

public void setProgressBar(ProgressBar progressBar) {
    progressBar.getIndeterminateDrawable().setColorFilter(new LightingColorFilter(0xFF000000,
        ContextCompat.getColor(getActivity(), android.R.color.white)));
    ActionBar actionBar;
    if ((actionBar = getActionBar()) != null) {
        actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM, ActionBar.DISPLAY_SHOW_CUSTOM);
        actionBar.setCustomView(progressBar, new ActionBar.LayoutParams(ActionBar.LayoutParams.WRAP_CONTENT,
            ActionBar.LayoutParams.WRAP_CONTENT, Gravity.CENTER_VERTICAL | Gravity.END));
    }
}