sprockets/src/main/java/net/sf/sprockets/content/res/Themes.java
@Nullable
    public static Drawable getActionBarBackground(Context context) {
        int[] attrs = {android.R.attr.actionBarStyle};
        TypedArray a = context.obtainStyledAttributes(attrs);
        int id = a.getResourceId(0, 0);
        a.recycle();
        if (id > 0) {
            attrs[0] = android.R.attr.background;
            a = context.obtainStyledAttributes(id, attrs);
            Drawable background = a.getDrawable(0);
            a.recycle();
            return background;
        }
        return null;
    }
@Nullable
    public static Drawable getActionBarBackground(Context context) {
        int[] attrs = {android.R.attr.actionBarStyle};
        TypedArray a = context.obtainStyledAttributes(attrs);
        int id = a.getResourceId(0, 0);
        a.recycle();
        if (id > 0) {
            attrs[0] = android.R.attr.background;
            a = context.obtainStyledAttributes(id, attrs);
            Drawable background = a.getDrawable(0);
            a.recycle();
            return background;
        }
        return null;
    }
Get the ActionBar background in the Context's theme.

@return null if a background is not defined