Java模块没有`api`，必须使用`compile`？

Question

As stated in https://developer.android.com/studio/build/gradle-plugin-3-0-0-migration.html#new_configurations , we now have api and implementation .

In Android Module ie apply plugin: 'com.android.application' , we do have both.

However in a plain Java Module ie apply plugin: 'java' (Used by my Android App Module), I could only find implementation , but not api .

Hence in one of the dependent, I need to use compile , and can't use api .
Is api inaccessible at Java Module?

Answer 1

You have to use:

apply plugin: 'java-library'

The key difference between the standard Java plugin and the Java Library plugin is that the latter introduces the concept of an API exposed to consumers .

The plugin exposes two configurations that can be used to declare dependencies: api and implementation .

More info here.