DocumentsActivity.java 文件源码

private void changeActionBarColor() {

        int color = SettingsActivity.getPrimaryColor(this);
        Drawable colorDrawable = new ColorDrawable(color);

        if (oldBackground == null) {
            getSupportActionBar().setBackgroundDrawable(colorDrawable);
        } else {
            TransitionDrawable td = new TransitionDrawable(new Drawable[] { oldBackground, colorDrawable });
            getSupportActionBar().setBackgroundDrawable(td);
            td.startTransition(200);
        }

        oldBackground = colorDrawable;

        setUpStatusBar();
    }