error: duplicate value for resource 'attr/orientation' with config '' .aapt.v2.Aapt2Exception: Android resource compilation failed

Question

I've got this compile error! I checked similar problems on stackoverflow but all of them were about different errors & not " attr/orientation' with config '' ", but they didn't work for my problem! I'm using androidx library , kotlin ,Gradle 4.10.1 ,

I do these steps, but still no result:

1- Clean Project

2- Rebuild

3- Invalidate caches / Restart

4- made another attrs.xml file on the folder : res->values-v21

5-so many other ways...

but all of them just failed! Any solution?

Answer 1

I find the problem, it is a bug and I reported it to Google ( b.android.com ) & they answered

Yep, we are aware of this issue, it will be fixed in the next alpha release. this is the : issue link

.

So how to solve it: I faced the problem when updated to alpha3 version of library in build.gradle (Module) :

  implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha3' 

Just downgrade it to lower version:

  implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha2' 

and now it's ok.

The problem was the conflict between constraintlayout:2.0.0-alpha3 library and attrs.xml merging on compile time!

and for you it might be just conflicts between some other libraries ( just check last updated libraries )

Answer 2

It happens if you are you have migrate to Androidx and you add android.support library. Just try to find Androidx library for the android.support library you are using. For example. Change

implementation 'com.android.support:cardview-v7:28.0.0'

To

implementation 'androidx.cardview:cardview:1.0.0'