A collection of low level libraries to help make mobile app development easier.

A software library that allows for simple usage of custom fonts in Android applications.

Build Realtime Apps. A powerful API to store and sync data in realtime.

Google Sign-In is a secure authentication system that reduces the burden of login for your users, by enabling them to sign in with their Google Account—the same account they already use with Gmail, Play, Google+, and other Google services. Google Sign-In is also your gateway to connecting with Google’s users and services in a secure manner. You can give your users the opportunity to pay with Google Pay, share with their Google-wide contacts, save a file to Drive, add an event to Calendar, and more. Integrate Google’s user-centric APIs and services inside your app to help your users take action and convert.

Google Tag Manager enables developers to change configuration values in their mobile applications using the Google Tag Manager interface without having to rebuild and resubmit application binaries to app marketplaces. This is useful for managing any configuration values or flags in your application that you may need to change in the future, including: * Various UI settings and display strings * Sizes, locations, or types of ads served in your application * Game settings Configuration values may also be evaluated at runtime using rules, enabling dynamic configurations such as: * Using screen size to determine ad banner size * Using language and location to configure UI flags Google TagManager also enables the dynamic implementation of tracking tags and pixels in applications. Developers can push important events into a data layer and decide later which tracking tags or pixels should be fired. TagManager currently supports the following tags: * Google Mobile App Analytics * Custom Function Call tag

Okio is a new library that complements java.io and java.nio to make it much easier to access, store, and process your data.

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All APIs for communicating with the Android system.

The Android framework provides MediaPlayer as a quick solution for playing media with minimal code, and the MediaCodec and MediaExtractor classes are provided for building custom media players. ExoPlayer is an open source project that provides a solution falling somewhere between these two options. It is a player that you can modify and extend. ExoPlayer supports features not currently provided by MediaPlayer, including Dynamic adaptive streaming over HTTP (DASH), SmoothStreaming and Common Encryption. It's designed to be easy to customize and extend, allowing many components to be replaced with custom implementations. Because ExoPlayer is a library that you include in your application, it can be easily updated along with your app.

The Google Analytics SDK for Android makes it easy for native Android developers to collect user engagement data from their applications. Developers can then use the Google Analytics reports to measure: The number of active users are using their applications. From where in the world the application is being used. Adoption and usage of specific features. Crashes and exceptions. In-app purchases and transactions. And many other useful metrics... The Google Analytics SDK also gives you the tools to monitor the success of mobile marketing campaigns. Connect user interactions with paid ads, Google Play downloads, and subsequent in-app usage and Ecommerce transactions. Google Analytics provides a powerful platform to measure and optimize all of your application marketing efforts.