主要模仿腾讯创意截屏功能，添加自定义标签，可单双手随意旋转、拖动、放大，修改标签内容等，非常流畅。感兴趣的同学可以下载库中novcapture_demo.apk试试。 详细介绍：http://www.xycoding.com/articles/2015/10/27/android-novcapture/
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