Open Source Android Libraries - Page 9
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Libraries for Android
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Mockito-Kotlin
Using Mockito with Kotlin
A small library that provides helper functions to work with Mockito in Kotlin. Mockito-Kotlin is available on Maven Central. For Gradle users, add the following to your build.gradle. -
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ModernStorage
Group of libraries that provide an abstraction layer over storage
ModernStorage is a group of libraries that provide an abstraction layer over storage on Android to simplify its interactions. -
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Mordant
Multiplatform text styling for Kotlin command-line applications
Mordant is a multiplatform library for rendering styled text in the terminal. You can use it to add color and style to text, create tables, draw animations, and more. -
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Motion Toast
A Beautiful Motion Toast Library for Kotlin Android
A Beautiful Motion Toast Library for Kotlin Android. -
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MyBatis Dynamic SQL
SQL DSL (Domain Specific Language) for Kotlin and Java
This library is a general-purpose SQL generator. Think of it as a typesafe and expressive SQL DSL (domain-specific language), with support for rendering SQL formatted properly for MyBatis3 and Spring's NamedParameterJDBCTemplate. The library also contains extensions for Kotlin that enable an idiomatic Kotlin DSL for SQL. The library will generate full DELETE, INSERT, SELECT, and UPDATE statements. The DSL implemented by the library is very similar to native SQL but it includes many functions that allow for very dynamic SQL statements. -
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NotyKT
Complete Kotlin-stack (Backend + Android) application
NotyKT is the complete Kotlin-stack note-taking application built to demonstrate a use of Kotlin programming language in server-side and Modern Android development tools. Dedicated to all Android Developers. -
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OK, Gradle!
IntelliJ/Android Studio plugin for searching artifacts ids
IntelliJ/Android Studio plugin for searching artifacts ids of popular Java libraries. This plugin is in JetBrains Plugins Repository! Use those for adding new dependencies easily to your build.gradle/build.gradle.kts files. -
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Okio
A modern I/O library for Android, Java, and Kotlin Multiplatform
Okio is a low-level I/O library created by Square for Java and Kotlin that simplifies and optimizes data access. It provides a modern alternative to Java’s InputStream and OutputStream, enabling efficient, buffered, and chainable data handling. Okio is used in many high-performance networking and serialization libraries, including OkHttp. -
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OpenSkyNet - Moving towards a comprehensive artificial intelligence solution for game developers under the LGPL. The goals are to implement action selection solvers, robust steering behaviors (including pathfinding algorithms), and machine learning.
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Picasso
A powerful image downloading and caching library for Android
Images add much-needed context and visual flair to Android applications. Picasso allows for hassle-free image loading in your application—often in one line of code! Many common pitfalls of image loading on Android are handled automatically by Picasso: Handling ImageView recycling and download cancelation in an adapter. Complex image transformations with minimal memory use. Automatic memory and disk caching. Adapter re-use is automatically detected and the previous download canceled. Transform images to better fit into layouts and to reduce memory size. You can also specify custom transformations for more advanced effects. Picasso supports both download and error placeholders as optional features. Resources, assets, files, content providers are all supported as image sources. For development you can enable the display of a colored ribbon which indicates the image source. -
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PieceOCake
A ridiculously simple Java save/load library
Do you ever curse Java for making it so ridiculously difficult just to save and load data? Do you ever say something like the following: "All I want to do is save the user's data! I don't want to deal with your BufferedWriters and HashMapThingies and stuff!" ...all in a remarkably incensed tone? Well, DON'T! There's a solution! It's a PIECE O' CAKE! Just use this handy dandy library and you can save/load like a champ. Forget about said BufferedWriters and HashMapThingies. What's so cakeriffic about this library: -Can store Strings, ints, and String arrays faithfully -Can completely ignore what goes on behind the scenes -Save() and load() methods to get your data. That's it. -So easy a subpar baker could use it How do you use it? Easy. -Tell PieceOCake what data you want to store. -Call the load() function. -Use get() and set() to, well, get and save your data. That's it. It's a Piece O Cake! -
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Pinview
A pinview library for Android
Pinview library for Android. -
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Provider
InheritedWidgets, but simple
provider is a lightweight state management approach for Flutter that wraps InheritedWidget to expose data down the widget tree in a clean, idiomatic way. It popularized simple patterns like ChangeNotifierProvider and Consumer to rebuild only the widgets that need updates. The library offers convenient providers for synchronous values, streams, and futures, plus utilities like MultiProvider and ProxyProvider to compose dependencies. Its appeal is minimal boilerplate, readability, and ease of onboarding for teams new to Flutter. Because it relies on Flutter’s core mechanisms, it integrates seamlessly with common architectural styles and existing widgets. Many apps use provider as a baseline pattern, and later evolve toward more advanced solutions as complexity grows—without discarding the conceptual model provider introduces. -
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QZXing
Qt wrapper library for the ZXing decoding library.
The project has been relocated at https://github.com/ftylitak/qzxing/ -
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React Native Vector Icons
Customizable Icons for React Native with full styling
Perfect for buttons, logos and nav/tab bars. Easy to extend, style and integrate into your project. If you want to use any of the bundled icons, you need to add the icon fonts to your Xcode project. For each platform (iOS/Android/Windows) you plan to use, follow one of the options for the corresponding platform. Upgrading this package often requires the font files linked to your projects to be updated as well. If the automatic linking works for you, running this again should update the fonts. You can either use one of the bundled icons supported or roll your own custom font. Since Icon builds on top of the Text component, most style properties will work as expected, you might find it useful to play around with background color, border width, border color, border radius, padding, margin, color, font size, etc. -
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React Native Voice
React Native Voice Recognition library for iOS and Android
A speech-to-text library for React Native. Manually or automatically link the NativeModule. Drag the Voice.xcodeproj from the @react-native-voice/voice/ios folder to the Libraries group on Xcode in your project. Click on your main project file (the one that represents the .xcodeproj) select Build Phases and drag the static library, lib.Voice.a, from the Libraries/Voice.xcodeproj/Products folder to Link Binary With Libraries. The plugin provides props for extra customization. Every time you change the props or plugins, you'll need to rebuild (and prebuild) the native app. If no extra properties are added, defaults will be used. While the included VoiceTest app works without explicit permissions checks and requests, it may be necessary to add a permission request for RECORD_AUDIO for some configurations. Since Android M (6.0), user need to grant permission at runtime (and not during app installation). -
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Refit
The automatic type-safe REST library for .NET Core, Xamarin and .NET.
Refit is a library heavily inspired by Square’s Retrofit library, and it turns your REST API into a live interface. Refit currently supports the following platforms and any .NET Standard 2.0 target. Every method must have an HTTP attribute that provides the request method and relative URL. There are six built-in annotations: Get, Post, Put, Delete, Patch and Head. The relative URL of the resource is specified in the annotation. A request URL can be updated dynamically using replacement blocks and parameters on the method. A replacement block is an alphanumeric string surrounded by { and }. Parameters that are not specified as a URL substitution will automatically be used as query parameters. This is different than Retrofit, where all parameters must be explicitly specified. Round-tripping route parameter syntax: Forward slashes aren't encoded when using a double-asterisk (**) catch-all parameter syntax. -
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Retrofit
Type-safe HTTP client for Android and Java by Square
Retrofit is a type-safe HTTP client for Android and Java developed by Square. It allows developers to define REST API calls using simple interface annotations, automatically converting responses into Java objects using converters like Gson or Moshi. Retrofit greatly simplifies network requests by abstracting away boilerplate code, making API integration in mobile and Java apps seamless and maintainable. -
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Ribble
Simple Dribbble Client using Dribbble API, fully written in Kotlin
Simple Dribbble Client using Dribbble API, work in progress. -
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Riverpod
A reactive caching and data-binding framework
Riverpod is a modern, framework-agnostic state management and dependency injection library for Dart and Flutter that emphasizes compile-time safety and explicit data flow. Instead of tying state to widget trees, it models state as providers that can be read anywhere, making logic more testable and decoupled from UI. It supports synchronous state, async data (futures/streams) with built-in loading/error handling, and advanced patterns like derived state and provider scopes. Riverpod’s design reduces rebuilds by letting widgets depend on fine-grained slices of state, which leads to predictable performance in complex apps. The ecosystem includes code generation and utilities that help catch invalid provider usage at compile time rather than at runtime. Overall, it encourages a clear separation of concerns and scales cleanly from small prototypes to large, multi-module applications. -
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RxJava
Reactive Extensions for the JVM
RxJava is a lightweight Java VM implementation of ReactiveX (Reactive Extensions). This is a library for the composition of asynchronous and event-based programs through observable sequences. It helps you write cleaner and simpler code by providing methods for solving problems quickly, and is easy to maintain and understand. RxJava works by extending the observer pattern in order to support sequences of data/events. It also allows you to compose sequences together declaratively through added operators, all while abstracting away concerns like low-level threading, thread-safety, concurrent data structures and synchronization. RxJava is commonly used for running simple background computations. It supports Java 6 or higher and languages that are based on JVM such as JRuby, Groovy and Clojure. -
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RxJavaSamples
Examples of some of the most common usages of RxJava 2 and Retrofit
Examples of some of the most common uses of RxJava 2 with Retrofit. For the interface that needs to request the token first, then use flatMap() to connect the token request and the actual data request coherently, without having to write a nested Callback structure. For non-disposable tokens (tokens that can be reused), after obtaining the token, save it for repeated use, and use retryWhen() to automatically re-acquire the token when it expires, making the process of token acquisition completely transparent and simplified. Convert the returned data into a more convenient format and give it to the Observer. -
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RxPermissions
Android runtime permissions powered by RxJava2
This library allows the usage of RxJava with the new Android M permission model. If you need to trigger the permission request from a specific event, you need to setup your event as an observable inside an initialization phase. You can use JakeWharton/RxBinding to turn your view to an observable (not included in the library). Because your app may be restarted during the permission request, the request must be done during an initialization phase. This may be Activity.onCreate, or View.onFinishInflate, but not pausing methods like onResume, because you'll potentially create an infinite request loop, as your requesting activity is paused by the framework during the permission request. If not, and if your app is restarted during the permission request (because of a configuration change for instance), the user's answer will never be emitted to the subscriber. -
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SFENCEShared
SFENCEShared library is set of help functions without links to SEM.
SFENCEShared library is set of help functions without links to SFENCE Extension Modules (SEM). It can be used with extern libraries which uses SFENCE but which isn't SEM. -
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Sandwich
Sandwich is an adaptable and lightweight sealed API library
Sandwich is an adaptable and lightweight sealed API library designed for handling API responses and exceptions in Android for Retrofit, and Kotlin Multiplatform for Ktor, and Ktorfit. Sandwich was conceived to streamline the creation of standardized interfaces to model responses from Retrofit, Ktor, and whatever. This library empowers you to handle body data, errors, and exceptional cases more succinctly, utilizing functional operators within a multi-layer architecture. With Sandwich, the need to create wrapper classes like Resource or Result is eliminated, allowing you to concentrate on your core business logic. Sandwich boasts features such as global response handling, Mapper, Operator, and exceptional compatibility, including ApiResponse With Coroutines.