App bundle not working on release mode

[Kharis Alvarado Riveros]

Hi,

I published the first version of my app to the app store with an app bundle that I created using the "flutter build app bundle" command but when I try to download it and run it on my phone it crashes on the google sign in as if it wasn't on release mode. The curious thing is that if I just do "flutter build apk --release" an upload it as a version of my app to the play console it works perfectly but there are a bunch of devices that aren't compatible with that version.

So my question is, I am doing something wrong when I build the app bundle? because for the looks of it is like it's creating an app bundle on debug mode somehow. I have tried to use also "flutter build app bundle --release" and it gets me the same result.

If any one could help me it would be appreciated. 

[Suzuki Tomohiro]

>  it crashes on the google sign in as if it wasn't on release mode

Google sign-in works in debug mode. Would you elaborate a bit more?

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[Kharis Alvarado Riveros]

I had a problem before an it was that google sign in only worked on debug mode when connected to my computer because when I built the apk it would build it on debug mode and not release mode, I corrected it to the "flutter build apk --release" and it built the apk perfectly. That was the reason why google sign in was only working, so I have the suspicion that it's doing the same thing with the app bundle because it crashes at the same point, I can download the app from the google play store it opens an shows every screen until it gets to the sign with google and at that point crashes and never opens again.

[Suzuki Tomohiro]

> it crashes at the same point,

What was the error message?

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[Souvik Dutta]

I guess it might be because of code obfuscation incompatiblity. Probably app bundle does some kind of obfuscation that is not supported by firebase.

Souvik flutter dev

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[selan.d...@gmail.com]

Hi, I faced the same issue. Google and Facebook sign in is working on emulator, but when I build the release APK, it's not working in an actual device.If you find out a solution, please let me know. 
thanks