Decompile an APK, modify it and then recompile it

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Thanks to Chris Jester-Young I managed to make it work!

I think the way I managed to do it will work only on really simple projects:

  • With Dex2jar I obtained the Jar.
  • With jd-gui I convert my Jar back to Java files.

  • With apktool i got the android manifest and the resources files.

  • In Eclipse I create a new project with the same settings as the old one (checking all the information in the manifest file)

  • When the project is created I’m replacing all the resources and the manifest with the ones I obtained with apktool
  • I paste the java files I extracted from the Jar in the src folder (respecting the packages)
  • I modify those files with what I need
  • Everything is compiling!

/!\ be sure you removed the old apk from the device an error will be thrown stating that the apk signature is not the same as the old one!

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