Building
After building Clean.apk
run java -jar unsign.jar Clean.apk
From Eclipse
To build, use the export option in Eclipse.
From Command Line
$ cd into/this/repo
$ ant debug
You should now have a clean_apk-debug.apk
under the bin/
directory.
Notes
Clean APK uses Instrumentation which means the app process will be running when the data is cleared. Instrumentation runs from within the app process.
Some apps may have issues with data being removed when the app is running.