Android 获取资源id

//添加帧动画
AnimationDrawable animationDrawable = new AnimationDrawable();
for (int i = 1; i < 8; i++) {
//获取res drawable 下run+i的图片资源
                int id = getResources().getIdentifier("run" + i, "drawable", getPackageName());
                Drawable drawable = getDrawable(id);
                if (null != drawable) {
                    animationDrawable.addFrame(drawable, 100);
                }
            }
imageView.setImageDrawable(animationDrawable);