PictureProgressBar.java 文件源码

public void setBarDrawableId(int id) throws Exception {
    Drawable drawable = getResources().getDrawable(id);
    if (drawable instanceof BitmapDrawable) {
        barDrawable = (BitmapDrawable) drawable;
        updateDrawableBounds(progressHeight);
    }else {
        throw new Exception("输入的id不是BitmapDrawable的id");
    }
}