Libraries are essential tools for developers, significantly speeding up development by providing pre-built solutions. This tutorial guides users through creating and distributing an Android library, either publicly or privately. Starting with a sample Android app, it covers setting up an Android library module, creating classes for functionality, and integrating the library into an app for testing. Developers can choose between open-source and closed-source distribution, with steps for enabling Proguard to obfuscate and protect code in closed-source scenarios. The guide also explains how to configure a repository manager, such as Sonatype Nexus, for hosting the library, and provides detailed instructions for setting up deployment scripts within the library's project structure. After successful deployment, it shows how to integrate the released library into an app using the appropriate dependency configurations in the build.gradle file, and concludes with steps to ensure privacy for a private library by restricting anonymous access.