In our sample project, the first two items in the list are your project’s top-level and module-level build files. To take a look at these adle files, open Android Studio’s Project panel (by selecting the Project tab) and expand the Gradle Scripts folder.

You’ll spend most of your time editing module-level build file(s) rather than your project’s top-level build file. Module-Level Build File: Each module has its own Gradle build file that contains module-specific build settings.Top-Level Build File: This is where you’ll find the configuration options that are common to all the modules that make up your project.Each module has its own build file, so every Android Studio project contains two kinds of Gradle build files: Android Studio projects consist of one or more modules, which are components that you can build, test, and debug independently.Gradle build files use a Domain Specific Language or DSL to define custom build logic and to interact with the Android-specific elements of the Android plugin for Gradle.Offer Different Versions of an App like Demo or Pro This feature is particularly handy for Android developers, for several reasons: Generate Multiple APKs from a Single Module: Gradle can generate multiple APKs with different package and build configurations from a single module.Generate Signed APKs: If you add all the necessary information, such as keyPassword and keyAlias, to your Gradle build file, you can use Gradle to generate signed APKs.T est Your Project: Gradle automatically generates a test directory and a test APK from your project’s test sources and can run your tests during the build process.Declare Project Dependencies: Dependencies can be modules, JAR files or libraries, and they can be located either on the local file system or a remote server.If you’re developing a project that doesn’t adhere to these default configuration rules, Gradle is easy to customize. Minimize Configuration Required for New Projects: Gradle has a set of default configuration settings that are automatically applied to every project you create in Android Studio.

Gradle is an automated build toolkit that can integrate into lots of different environments, via plugins.

Testcompile gradle android studio 3.0