Error:Execution failed for task ':app:packageRelease'. > Unable to compute hash of /../AndroidStudioProjects/../classes.jar

Question

I\'m trying to do a \'release\' build on an Android app and I keep on getting this error of:

Unable to compute hash of /../AndroidStudioProjects/../cl

Answer 1

I know there's already an answer here, but my situation was a little different, and I wanted to share it.

For me, my project's proguard file, namely, proguard-rules.pro, was somehow renamed to proguard-android.txt.

The proguard-android.txt is reserved for Android's default proguard rules, so essentially, I was overriding Android's proguard file, which was causing havoc, and I would get the Unable to compute hash message.

Once I changed the filename in my project from proguard-android.txt to proguard-rules.pro I was able to get things working.