How to extract or unpack an ab file Android Backup file

Question

I am running an android 4 0 3 device  and I want to extract the back up file created by    adb backup -f   data ab -noapk app package name   The above line works inside the CMD  windows  and I am able to get the data ab file inside the     directory    What I can t do is extact that file using CMD   I tried the below two methods   dd if data ab bs 1 skip 24   openssl zlib -d   tar -xvf -  dd if data ab bs 1 skip 24   python -c  import zlib sys sys stdout write zlib decompress sys stdin read        tar -xvf -   I get the below error    I tried extracting it via CYGWIN  however  I failed too     Where should I do the extraction   In which directory should my command prompt be   Any insights

User · Answer

I have had to unpack a  ab-file  too and found this post while looking for an answer  My suggested solution is Android Backup Extractor  a free Java tool for Windows  Linux and Mac OS   Make sure to take a look at the README  if you encounter a problem  You might have to download further files  if your  ab-file is password-protected   Usage  java -jar abe jar  -debug   -useenv yourenv  unpack  lt backup ab gt   lt backup tar gt   password   Example   Let s say  you ve got a file test ab  which is not password-protected  you re using Windows and want the resulting  tar-Archive to be called test tar  Then your command should be   java exe -jar abe jar unpack test ab test tar

User · Answer

As per https   android stackexchange com a 78183 239063 you can run a one line command in Linux to add in an appropriate tar header to extract it        printf   x1f x8b x08 x00 x00 x00 x00 x00    tail -c  25 backup ab      tar xfvz -   Replace backup ab with the path to your file

[android] How to extract or unpack an .ab file (Android Backup file)

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