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My Android app is larger than the 50 MB limit Google Play imposes so I have to generate a .obb file for it. However, I have come to find that the JOBB tool Google provides is incredibly buggy. I'm trying to create an encrypted .obb file, but depending on the content of the folder I'm packing into the .obb, sometimes the output file is corrupted and can't be be mounted, or it can be mounted but some files inside the obb are corrupted.

Is there an alternative to Google's JOBB tool? This one seems to have been developed by a 5 year old.

AxiomaticNexus
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2 Answers2

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I think there are no alternative to JOBB tool. But you can try to get the latest sources of this tool from Android Git and build. May be they fixed some bugs but haven't released yet.

Ilya Tretyakov
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Turns out there aren't any options that would allow you to mount the file like Google's buggy JOBB tool. If mounting is not a requirement, thankfully there's still salvation. The best option I could find that allows encryption is:

  • Use a tool that supports compression in the zip format and encryption using AES 128, AES 256, or standard zip encryption. Be aware that some encryption algorithms are not very secure; AES 256 is one of the strongest you can use. One of the best tools to do the job is 7-Zip.
  • Use Zip4j, a Java library that among many other features, allows you to read straight from the zip file and supports the encryption methods mentioned above.
AxiomaticNexus
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