How to Package an Android Library Project into a JAR File?

How to Package an Android Library Project into a JAR File

When developing Android applications with multiple modules, sharing libraries between projects can enhance code reusability and modularity. To achieve this, it is essential to distribute the library as a JAR file. This article provides a step-by-step guide to create a JAR file from an Android Studio library project.

Step 1: Configure the build.gradle

In the library project's build.gradle file, add two tasks: deleteJar and createJar. Make sure to include a dependency rule to execute createJar after deleteJar and build.

task deleteJar(type: Delete) {
    delete 'libs/jars/logmanagementlib.jar'
}

task createJar(type: Copy) {
    from('build/intermediates/bundles/release/')
    into('libs/jars/')
    include('classes.jar')
    rename('classes.jar', 'logmanagementlib.jar')
}

createJar.dependsOn(deleteJar, build)

Step 2: Execute the createJar Task

Expand the Gradle panel in Android Studio and locate the "All tasks" section under the library project. Double-click on the "createJar" task to execute it.

Step 3: Retrieve the JAR File

After successful execution of the createJar task, locate the generated JAR file in the specified path ('libs/jars/logmanagementlib.jar').

Step 4: Integrate into Other Projects

Copy the generated JAR file into the 'libs' folder of the project where you want to use the library. Right-click on the JAR file and select "Add as Library" to incorporate it into your project.

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