仿微信图片预览的封装，继承AlertDialog，简单易用
Imitate WeChat picture preview, inherit AlertDialog, and it is easy to use
The example of picture:
Install：
导入除开README.md的上面的文件到项目中即可
Import the above files except README.md into the project
How to use：
法一：
one：
new CustomPreview(QualificationActivity.this, imgArr).show();imgArr是图片链接集合List< String >，效果是渐进渐出
imgArr is List< String >，the effect is fade in or out
法二：
two：
new CustomPreview(QualificationActivity.this, imgArr, simpleDraweeViewList).show();simpleDraweeViewList是图片对象集合List< SimpleDraweeView >，效果是仿微信从图片位置放大效果和缩小到恢复位置
simpleDraweeViewList is List< SimpleDraweeView >，the effect is of imitating WeChat preview zoom in or out from the initial postion
Other methods：
设置图片描述
Set picture title
setTitleList(List<String> titleList)设置当前第几个图片
Set picture current position
setCurrentPosition(Integer currentPosition)一分钱也是源源不断技术的推动力
Chinese friends welcome to reward, and foreign friends welcome to give me a star
