WRITE_EXTERNAL_STORAGE权限的必要性

但是今天写了一个简单的应用小工具，没有声明W ITE_EXTERNAL_STORAGE的权限，导致文件不能正常创建。

忘记在哪看到的，说是4.4以后不用写这个权限了。今天去google官网开了一下

Your app can not read shared files on the external storage when running on Android 4.4, unless your app has the

READ_EXTERNAL_STORAGE

permission.
That is, files within the directory returned by

getExternalStoragePublicDirectory()

are
no longer accessible without the permission. However, if you need to access only your app-specific directories, provided by

getExternalFilesDir()

,
then you do not need the

READ_EXTERNAL_STORAGE

permission.

4.4以后并没有降低权限的要求，反而是提升了。