My HTC Sensation is rooted (I can see the SuperUser app; I can su using the Terminal Emulator app; I was able to install Android Stock ROM Cyanogenmod).
I'm not able to open the /data folder using either ADT or adb shell su (permission denied) or File Expert app.
What can I do to open the folder?
I found the answer and solution:
- As for access the
adb shell, I need to enable "Root access" for ADB in "Developer options" (this apply for stock Android 4.0.4 by Cyanogenmod but the same option could be present somewhere else in your phone) - As for File Expert, the "Root Explorer" functionality is
only available in their paid version
- I'm going to use ES File Explorer and the likes
- I haven't found a solution for access through ADT's Device Manager yet but I'm happy having 2 options above
If you have installed supersu like apk. When you do 'su' in the shell, there might be a notification on screen asking that if you agree the program to run 'su'.
You have to grant the permission.
Nothing if your mobile is root then u can't access anything without the SU permission just take the permission by @kiNGUSER (app) then u can give access to your file manager
来源：https://stackoverflow.com/questions/18226210/cannot-open-data-folder-in-a-rooted-android-device