问题
I'm trying to test the behavior of my application when it cannot access some files due to missing permissions.
Is it possible to change file/folder permissions on an android emulator using FileExplorer in DDMS perspective?
回答1:
To change permissions in the emulator you need to use the adb shell command from your adroid-sdk platform-tools. In the android shell you can enter the command su to get root access. Now you can see and change the permissions with the normal unix commands chmod
Note, that the system folder in Android is mounted read-only. You would have to remout it read-write after this tutorial:
http://android-tricks.blogspot.com/2009/01/mount-filesystem-read-write.html
Be careful in anyway to use only writable filesystems like /data or sdcardfor your application data since using restricted folders can have negative side effects in a productive environment!
来源：https://stackoverflow.com/questions/7473573/change-file-permissions-in-ddms-android