android lint unused resources from library module are used in app

Question

My app is split up in a main app and different library modules. When I run

./gradlew lint  

each module is checked independently and for each module a lint.xml file is generated. In the lint.xml files there were tons of unused resources warnings, but that resources are used in the main app. How can I configure lint to check globally in the app if a resources is used or not?

Thanks :)

Answer 1

The trick is to only check your app component and the rest of the app recursively through there:

Enable recursive lint checks

android {     lintOptions {         checkDependencies true     } } 

Only check app

./gradlew :app:lintDebug 

This will not only fix the unused resources issues, but it's also faster since lint is only called once instead of once per module. This means that things like symbol resolution in the SDK are only done once.