The multiproject directory layout
A multiproject (or multimodule, as some prefer to call it) is a group of projects that are logically related to each other and often have the same develop-build-release cycles. The directory structure is important for laying out the strategy for building such projects. Typically, a top-level root project contains one or more subprojects. The root project may contain source sets of its own, may contain only the integration tests that test the integration of the subprojects, or may even act just as a master build without any source and tests. Gradle supports every such configuration.
The arrangement of subprojects relative to the root project may be flat, that is, all the subprojects are the direct children of the root project (as shown in sample 1) or are hierarchical, such that the subproject may also have nested child projects (as shown in sample 2) or any hybrid directory structure.
Let's refer to the following directory structure as sample 1:
sample1...
