After Android Studio is upgraded, it indirectly depends on the implementation project and the api project

 

Component-based development using AndroidStudio3.0 and above versions found that indirectly dependent libraries reported an error and the corresponding Library could not be found

My project looks like this

|--moduleA

|--moduleB

|--moduleC

 

1 Depend on moduleA in the build.gradle file of moduleB:

implementation project(path: ':moduleA')

2 Depend on moduleB in the build.gradle file of moduleC:

implementation project(path: ':moduleB')

 So moduleC indirectly depends on moduleA

But the class that uses moduleA in moduleC is directly compiled and error is not found

import also cannot import moduleA

Solution: Replace moduleB's dependency on moduleA with:

api project(path: ':moduleA')

The reason is that:

implementation: the dependency only acts on the current Module and is not publicly disclosed;

api: Depends on public disclosure, not only on the current module.