Android Studio 3.5 Cause: buildOutput.apkData must not be null Clean & Rebuild already tried

Question

After I\'ve updated Android Studio 3.4 to 3.5 and wanted to build a Signed APK, however I get the error :

Cause: buildOutput.apkData must not be null Erro

Answer 1

option 1 - change the destination folder of the apk generated and generate apk again.

option 2 - delete the output.json file under release folder and generate apk again.

It solved my problem. I hope it will help you too.

Answer 2

I dont know why the issue was occurring but changing the

destination folder of output apk

fixed the issue.

Answer 3

Manually delete the build directory and rebuild, That worked for me

Answer 4

It's working on AS 3.4.2 version. I've tried everything (Clean & Make the Project and to Clean & Rebuild) and downgraded to 3.4.2 at last.

This issue might be fixed in the 3.6 release. https://androidstudio.googleblog.com/2019/07/android-studio-36-canary-5-available.html

Answer 5

Delete the contents of the build folders (existing *.apk and output.json):-

1. AndroidProject\app\build\outputs\apk\androidTest\debug\
2. AndroidProject\app\build\outputs\apk\debug\
3. AndroidProject\app\release\

And then rebuild the system by:-

File -> Sync Project with Gradle Files

Answer 6

This issue happens after update my Android studio v3.4 to v3.5 Now, it is working fine

I fixed this issue by deleting debug/output.json and release/output.json files
otherwise change your apk destination folder path.

Android Studio 3.5
compilesdkVersion 28

apk generating working