1.Android6.0运行时权限简介_2.Android6.0权限适配之WRITE_EXTERNAL_STORAGE（

Android6.0运行时权限简介：http://unclechen.github.io/2016/03/05/Android6.0运行时权限简介/

Android6.0权限适配之WRITE_EXTERNAL_STORAGE（SD卡写入）:https://blog.csdn.net/xiechengfa/article/details/52699233

Android 6.0 运行时权限理解:https://blog.csdn.net/hehe26/article/details/52804630