Top 15 Android Libraries ( Updated 2021) for Android App Development

Android app development has evolved rapidly, and leveraging the right libraries can dramatically improve productivity, code quality, and app performance. Whether you are working with an Android app development company or building solo, having the right set of libraries in your toolkit is essential. Here are the top 15 Android libraries that every developer should know about in 2021.

These libraries cover a wide range of functionalities from dependency injection to image loading, from analytics to crash reporting. If you are into mobile application development, these tools will help you build robust, scalable, and high-performing Android applications.

1. Dagger 2

Dagger 2 is a fully static, compile-time dependency injection framework for both Java and Android. It uses Java annotation processors to generate code for dependency injection, providing compile-time analysis of all dependencies. Unlike reflection-based frameworks, Dagger 2 generates plain Java source code that is easy to debug. It eliminates boilerplate code and helps create modular, testable application architectures. Dagger 2 is widely adopted in production apps for its performance benefits and strong type safety.

2. Retrofit

Retrofit is a type-safe HTTP client for Android and Java developed by Square. It turns your REST API into a Java interface using annotations to describe HTTP requests. Retrofit supports configurable serialization with converters for JSON, XML, and other formats. It handles network requests efficiently with built-in support for synchronous and asynchronous calls. Retrofit is the go-to solution for making network requests in Android applications, offering clean API definitions and powerful request/response handling.

3. Picasso

Picasso is a powerful image downloading and caching library for Android, also developed by Square. It simplifies the process of loading images from external URLs into ImageViews with just a single line of code. Picasso handles image transformations, automatic memory and disk caching, and adapter recycling. It manages complex image loading scenarios including placeholder images, error handling, and image resizing. The library is lightweight and integrates seamlessly into any Android project.

4. Glide

Glide is a fast and efficient open-source media management and image loading framework for Android, recommended by Google. It wraps media decoding, memory and disk caching, and resource pooling into a simple and easy-to-use interface. Glide supports fetching, decoding, and displaying video stills, images, and animated GIFs. It uses a smart memory management strategy that minimizes garbage collection overhead. Glide is particularly well-suited for scrolling lists where image loading performance is critical.

5. Zxing

Zxing (Zebra Crossing) is an open-source barcode image processing library implemented in Java. It supports reading and generating of barcodes in multiple formats including QR Code, Data Matrix, Aztec, PDF 417, and more. The library provides barcode scanning functionality that can be integrated into Android applications for various use cases such as product lookup, ticketing, and authentication. Zxing is widely used in retail, logistics, and inventory management applications.

6. CAMView

CAMView is an Android library that provides a simple way to integrate barcode scanning with QR code capabilities and live camera preview into your application. It offers real-time video processing and supports multiple barcode formats. CAMView simplifies the camera integration process with customizable scanner views and overlay options. The library handles camera permissions, preview management, and barcode detection in a unified API, making it ideal for applications that require live video processing and barcode scanning functionality.

7. Bubble Navigation

Bubble Navigation is a lightweight Android library that provides a beautiful and customizable bottom navigation bar with bubble animation effects. It offers smooth transition animations when users switch between navigation items. The library supports custom icons, colors, and fonts with flexible configuration options. Bubble Navigation is designed to enhance user experience with visually appealing navigation interactions while maintaining a small footprint. It follows Material Design guidelines and can be easily integrated into any Android application.

8. Espresso

Espresso is a testing framework for Android that provides APIs for writing UI tests to simulate user interactions. It automatically synchronizes test actions with the UI thread, ensuring reliable and deterministic test results. Espresso supports testing of activities, fragments, and intents with a fluent API that makes test code readable and maintainable. The framework is part of the Android Testing Support Library and integrates well with Android Studio and CI/CD pipelines. Espresso is essential for ensuring app quality through automated UI testing.

9. Mixpanel

Mixpanel is an advanced analytics platform that provides event-based tracking capabilities for Android applications. It enables developers to monitor user interactions, track specific events, and analyze user behavior patterns. Mixpanel offers features like funnel analysis, retention tracking, and A/B testing to help product teams make data-driven decisions. The Android SDK integrates seamlessly with minimal code and supports both automatic and manual event tracking. It provides real-time dashboards and detailed reports for understanding user engagement.

10. Gravity View

Gravity View is an Android library that enables motion sensor-based image tilting effects. It uses the device's accelerometer and gyroscope to create an interactive parallax effect on images, making them tilt and move based on the device orientation. Gravity View adds a dynamic visual layer to static images, enhancing the visual appeal of galleries, profile screens, and media-rich applications. The library is lightweight and easy to implement with customizable sensitivity and tilt range parameters.

11. MP Android Chart

MP Android Chart is a powerful and flexible charting library for Android. It supports multiple chart types including line charts, bar charts, pie charts, radar charts, bubble charts, and candlestick charts. The library offers extensive customization options for colors, labels, animations, and interactions. MP Android Chart handles large datasets efficiently with smooth scrolling and zooming capabilities. It is ideal for data visualization in business, financial, health, and analytics applications where presenting data in graphical format is essential.

12. ExoPlayer

ExoPlayer is an application-level media player developed by Google for Android. It provides an alternative to Android's MediaPlayer API with support for features not natively available, including DASH, SmoothStreaming, and HLS adaptive playback. ExoPlayer supports both audio and video playback with advanced features like DRM protection, side-loaded subtitles, and custom rendering. It is highly extensible and customizable, making it the preferred choice for media-heavy applications. Google uses ExoPlayer in many of its own apps including YouTube and Google Play Movies.

13. Timber

Timber is a small, extensible logging utility built on top of Android's native Log class. It automatically generates log tags from the calling class name, eliminating the need for manual tag management. Timber supports custom log trees that can route log output to different destinations such as crash reporting services, analytics platforms, or custom backends. The library provides a clean API for logging with automatic tag generation, making debugging more efficient. It is particularly useful in production environments where logging behavior needs to be different from development.

14. Crashlytics

Crashlytics is a powerful crash reporting tool that helps developers track, prioritize, and fix stability issues in real time. It provides detailed crash reports with device information, stack traces, and user actions leading up to the crash. Crashlytics uses intelligent grouping to cluster related crashes together, making it easier to identify the most impactful issues. The tool integrates with Firebase and provides alerts, trends, and velocity tracking. It is an essential tool for maintaining app quality and ensuring a smooth user experience in production.

15. Robolectric

Robolectric is a unit testing framework that allows Android tests to run on the JVM without the need for an emulator or physical device. It simulates the Android SDK, providing shadow objects that mimic the behavior of Android components. Robolectric enables fast test execution by eliminating the deployment step, making it ideal for test-driven development workflows. The framework supports testing of activities, services, content providers, and other Android components. Robolectric is widely used alongside Espresso for comprehensive test coverage in Android projects.

Conclusion

These 15 Android libraries represent the best tools available for modern Android app development. From dependency injection with Dagger 2 to crash reporting with Crashlytics, each library addresses a specific aspect of the development process and helps developers build better apps faster. Choosing the right combination of libraries depends on your project requirements, but having familiarity with all of them will make you a more effective Android developer.

At QSS Technosoft, our Android app development team leverages these libraries and many more to deliver high-quality, performant mobile applications. If you are looking for expert mobile application development services, feel free to explore our capabilities and read more on our blog.