Automaticly add module dependencies on gradle

Question

I've an weird behavior when using modules on gradle with Android Studio... it's kind complicated to explain so i think is better to give an example

Let say my application has two modules

:bar
:foo

foo uses play-services-location so I do import it on its build.gradle. foo compiles fine.

bar uses foo, so on build.gradle of bar's folder I do:
api project(path: ':foo')
bar also uses play-services-location but as bar imports foo i think it should transitivelly import play-services-location however if I don't explicit do
implementation "com.google.android.gms:play-services-location:$location_library_version"
bar doesn't compile

So am I missing something? Shouldn't it automaticly import all the dependency dependencies... so any transitive dependency be ready and I didn't need to re-import it?

Answer 1

You should use 'api' (not 'implemenatation') for 'google-play-location' in 'foo', so it can be depended by 'bar' which uses 'foo'. And if there is no other modules which depends on 'bar', it is better to specify 'implementation foo' in 'bar', not 'api'