Release version doesn't see Application class after installing the app

Question

In a debug version app works fine. But when I generate sign apk and install this, after open app - it immediately crashes due to a logcat error:

 Caused by: java.lang.ClassNotFoundException: Didn't find class "com.mypackage.AppClass" on path: DexPathList[[zip file "/data/app/com.mypackage-1/base.apk"],nativeLibraryDirectories=[/vendor/lib64, /system/lib64]].

I use AppClass to extends MultiDexApplication and I've got there some functions also. I have declared this class correctly in a manifest.

The most complicated is that it works in a debug version but only in release version this problem occurs.

I would be really grateful if someone could help me to resolve this situation.

Regards

Answer 1

Finally, I found a solution which helped me to resolve this problem. I had to add this part of code in a gradle:

  dexOptions {
      preDexLibraries = false
   }

And the following to the general part of your apps build.gradle

afterEvaluate {
   tasks.matching {
      it.name.startsWith('dex')
   }.each { dx ->
      if (dx.additionalParameters == null) {
         dx.additionalParameters = ['--multi-dex']
      } else {
         dx.additionalParameters += '--multi-dex'
      }
   }
}

For the others who can have similar issue I'm referring to a post in which I obtained a solution: https://stackoverflow.com/a/26627133/5736917