/**
* 根据Drawable Id生成对应的MImage
*
* @param drawableId
* @param width
* @param height
* @param angle
* @return
*/
private MImage generateMImage(int drawableId, int width, int height, float angle) {
BitmapDrawable drawable = (BitmapDrawable) mPicManager.getViewDrawable(drawableId);
MImage img = new MImage(drawable);
scaleImage(img, width, height);
img.setRotation(angle);
return img.getDrawingCache();
}
