Android FileProvider

1 Android7.0须知--应用间共享文件（FileProvider）

http://www.jianshu.com/p/3f9e3fc38eae

2 android.support.v4.content.FileProvider

https://developer.android.com/reference/android/support/v4/content/FileProvider.html

3 解决 Android N 上 报错：android.os.FileUriExposedException

4 http://stackoverflow.com/questions/38200282/android-os-fileuriexposedexception-file-storage-emulated-0-test-txt-exposed

5 http://stackoverflow.com/questions/38200282/android-os-fileuriexposedexception-file-storage-emulated-0-test-txt-exposed

6 Taking Photos Simply
https://developer.android.com/training/camera/photobasics.html

7 FileProvider共享文件、缓存
http://www.jianshu.com/p/cb61847acb38

8 存储选项（谷歌官方文档，中文）
https://developer.android.com/guide/topics/data/data-storage.html?hl=zh-cn#AccessingExtFiles