Android

Multi-language framework for making typical encryption schemes easy to use: data at rest, authenticated data exchange, transport protection, authentication, and so on.

GUI

Pull to refresh

A swipe refresh layout is available in the v4 support library.

Cardslib

Android Library to build a UI Card.

AndroidStaggeredGrid

Grid view which supports multiple columns with rows of varying sizes.

Flow

Library that helps with describing an app as a collection of moderately independent screens.

SortableTableView

An Android library containing a simple TableView and an advanced SortableTableView providing a lot of customisation possibilities to fit all needs.

MaterialProgressBar

Material design ProgressBar with consistent appearance.

AndroidFillableLoaders

Fillable progress view working with SVG paths. Nice option too for creating interesting app logos.

NexusDialog

Allows you to easily and quickly create forms in Android with little code.

Snap RecyclerView Utils

Populate Single or multiple Layout RecyclerView without creating an Adapter.

MultiSnapRecyclerView

Android library for multiple snapping of RecyclerView

SwipeableCard

Implementation of swipe card like StreetView!!

ElasticProgressBar

Beautiful loading bar.

EntryScreenManager

Intro/Entry/Walkthrough/Starting Screens.

EasyIntro

The flexible, easy to use, all in one app intro library for your Android project.

Material-Calendar-View

Material Design Calendar compatible with API 8+

CrunchyCalendar

A material calendar widget with infinite scrolling, date range selection and color customization.

SmoothOverscrollableScrollView

Small custom view with smooth overscroll. You can add header with scale background

SectionedRecyclerViewAdapter

An Adapter that allows a RecyclerView to be split into Sections with headers and/or footers.

DragListView

Drag and drop to reorder items in a list, grid or board.

Animated Expanding ListView

Animated Expanding ListView provides a fancy animation on expanding or collapsing the content of a listview item.

TastyToast

Toasts with icons and color.

DotLoader

A customizable loading animation with Dots.

PodSlider

A customizable slider widget adhering to material design specs.

TapTargetView

An implementation of tap targets from the Material Design guidelines for feature discovery.

ShowCaseView

The ShowcaseView library is designed to highlight and showcase specific parts of apps to the user with a attractive and flat overlay.

MaterialIntroScreen

Material Intro Screen implementation with easily extensible API.

FloatingView

FloatingView can make the target view floating above the anchor view with cool animation.

Timecon

Easy-to-use animated clock icon

Audiogram

Lightweight audiowave progressbar

Bubbles for Android

Facebook like chat bubble library

Litho (By Facebook)

A declarative framework for building efficient UIs on Android.

MultiViewAdapter

Recyclerview Adapter library to create composable view holders.

LGSnackbar

An easy to use and customisable wrapper of the native Android Snackbar which stays visible across multiple activities.

ShimmerLayout

Memory efficient shimmering effect for Android applications.

CircleProgressBar

A simple library for creating circular progressbars for Android.

Easy-Signature-Android

An simple ui library that provides a plugable signature view.

Flashbar

A highly customizable, powerful and easy-to-use alerting library for Android.

YuanaItemSettingView

Customizable Item Setting View for Android.

Gradients

A curated collection of splendid gradients.

OneAdapter

RecyclerView Adapter with multiple modules and hooks to simplify and enhance the use while preventing common mistakes.

NoPaginate

Simple Android pagination library

ActionBarSherlock

ActionBar for older Android versions.

FadingActionBar

Fading action bar effect that can be seen in the new Play Music app.

SlidingMenu

Library to create applications with slide-in menus.

SlidingTutorial

Simple library that helps to create awesome sliding android app tutorials.

PagerSlidingTabStrip

An interactive indicator to navigate between the different pages of a ViewPager.

Page View indicator

Support for horizontally scrolling ViewPager.

RecyclerTabLayout

An efficient TabLayout library implemented with RecyclerView.

MaterialDrawer

Simple take on a material design navigation drawer.

Debug-Artist

Debug menu to enable leakcanary, scalpel and others easy.

Floating-Navigation-View

A simple Floating Action Button that shows an anchored Navigation View.

SmoothMotion

Kotlin library for simplifying animations and transitions in Jetpack Compose.

Rebound

Rebound is a Java library that models spring dynamics.

Android View Animations

Cute view animation collection.

Android-Transition

Allows the easy creation of view transitions that react to user inputs.

Android-View-Actions

Makes creating complex animations for views easy.

Swipper

Android library for swipeable gestures to control volume , brightness and seek .

Spotlight

Android Library that lights items for tutorials or walk-throughs etc...

Crescento

Explore new style in material design by adding curve below image view.

android-crop

Library project for cropping images.

CircularImageView

Custom view for circular images while maintaining the best draw performance.

Android-Image-Filter

Library project for applying image filters easily.

Compressor

Compressor is a lightweight and powerful android image compression library.

ShapeImageView

Library to display images in different shapes.

FloatingLabel

FloatingLabel Allows you to create a blow kind of EditText. *Doesn't have Gradle or Maven Support.*

MaterialEditText

Supporting Floating Labels, Single Line Ellipsis, Max/Min Characters, Helper Text and Error Text with Custom Colors.

EmojiCompat

Adds emoticons to your app

MaterialSearchBar

Material Design Search Bar for Android

InputMask

Pattern-based user input formatter, parser and validator.

SweetPassword

Password EditText that allows to custom toggle button

VoiceOverlay

An overlay that gets your user’s voice permission and input as text in a customizable UI.

Material Dots Indicators

Three Material Dots Indicators styles for View Pagers.

Picasso

A powerful image downloading and caching library for Android.

Universal Image Loader

Asynchronous, out of the box loading and caching of images.

Glide

An image loading and caching library for Android focused on smooth scrolling, Recommended by Google.

Fresco

An Android library for managing images and the memory they use.

Glide Bitmap Pool

Glide Bitmap Pool is a memory management library for reusing the bitmap memory.

Coil

Image loading for Android backed by Kotlin Coroutines.

MediaPicker

Android Library that lets you to select multiple images, video or voice for Android

Android Image Picker

A library that makes images and videos selection from gallery feels easy. It also support GIF and simple camera action

ijkplayer

Android/iOS video player based on FFmpeg n3.2, with MediaCodec, VideoToolbox support.

Exoplayer

ExoPlayer is an application level media player for Android, allow playing audio and video both locally and over the Internet.

VideoPlayView

Custom Android view with video player, play/stop, loader and placeholder image.

MagicalCamera

Simple way to take or select photos of your gallery, with other features for manage pictures.

Camera

Use Android camera to take pictures and videos, based on camera2 api.

Convalida

A simple and annotation-based way to validate your input fields.

Paginate

ActionBar

Animations

Images

Inputs

View Pagers

Loading Images

Media Picker

Video

Supports features like Dynamic adaptive streaming over HTTP (DASH), SmoothStreaming and Common Encryption

Camera

Field Validation

JSON

Gson

Gson is a Java library used for serializing and deserializing Java objects from and into JSON.

Jackson JSON Processor

High-performance JSON processor.

Moshi

A modern JSON library for Android and Java.

Crash monitoring

Fabric Crashlytics

Easy crash reporting solution.

HockeyApp

Distribution, Crash Reports, Feedback and Analytics

Splunk MINT

Monitoring, Crash Reports, Real time data, Statistic.

Bugsnag

Cross platform error monitoring. Free tier. Support for SDK & NDK. Error reports include data on device, release, user, and allows arbitrary data.

Catcho

No Force Close any more.

Apteligent

Cross platform crash reporting/analytics solution. Supports NDK log.

Instabug

Bug reporting, Crash Reporting, In-app Feedback.

Networking

Ion

Good networking library for android.

OkHttp

An HTTP+SPDY client for Android and Java applications.

RoboSpice

Library that makes writing asynchronous network requests easy.

IceNet

Fast, Simple and Easy Networking for Android

Android Volley

Official Android HTTP library that makes networking for easier and faster.

IceSoap

Easy, asynchronous, annotation-based SOAP for Android.

node-android

Run Node.js on Android.

HappyDns

A Dns library, user can use custom dns server, dnspod httpdns. Only support A record.

RESTMock

HTTP Web server for mocking API responses in Android Instrumentation tests.

Fast-Android-Networking

A Complete Fast Android Networking Library that also support HTTP/2.

Logger

logger

Simple, pretty and powerful logger for android

timber

A logger with a small, extensible API which provides utility on top of Android's normal Log class.

LoggingInterceptor

An OkHttp interceptor which pretty logs request and response data.

Bugfender

Upload your logs and check them online, specially made for mobile

EzyLogger

Simple Lightweight logger

Logback Android

Logback port to Android which provides a highly configurable logging framework for Android apps.

LogDog

LogDog is a remote debugging/logging sdk (iOS and Android) with a web ui. Captures all logs and requests in real-time and allows to intercept them.

Notifications

android-remote-notifications

Pulls notifications from a remote JSON file and shows them in your app.

Android HeartBeat Fixer

Way to set heartbeat interval and users receive PushNotifications from GCM.

Database

Cupboard

Access the sqlite easily via direct database access or through the ContentProvider framework.

DbInspector

Provides a simple way to view the contents of the in-app database for debugging purposes.

SQLite Asset Helper

manage database creation and version management using an application's raw asset files.

Realm

The alternative to SQLite and ORMs: Simple, modern and fast! Object oriented API and multi platform support.

Realm Asset Helper

Copies a realm database from the apk assets folder. Efficiently handles versioning of read-only realm databases.

RestorableSQLiteDatabase

A wrapper to replicate android's SQLiteDatabase with restoring capability.

Nitrite Database

A NoSQL embedded document store for Android with MongoDb like API.

requery

Compile time ORM and SQL query library for Java & Android.

GreenDAO

Light & fast ORM solution.

ORMLite

Lightweight ORM Java package for JDBC and Android.

ActiveAndroid

Active record style ORM.

Sugar ORM

Insanely easy way to work with Android Databases.

DBFlow

Fast and powerful ORM with compile-time annotation processing.

NexusData

Object graph and persistence framework for Android.

SimpleNoSQL

A simple NoSQL client for Android. Meant as a document store using key/value pairs and some rudimentary querying. Useful for avoiding the hassle of SQL code.

RxSimpleNoSQL

Reactive extensions for SimpleNoSQL. Manipulate entities using Observables.

ORM

REST

Retrofit

Retrofit turns your REST API into a Java interface.

Spring for Android - Rest Template

A Rest Client for Android.

Testing

Robotium

Test automation framework for black-box UI tests.

Roboletric

Unit test framework to run tests inside the JVM on your workstation, not in the emulator.

AssertJ Android

AssertJ assertions geared towards Android.

Green Coffee

Run your Cucumber tests in your Android instrumentation tests.

Tracking

MobileAppTracking

Tracking your marketing campaigns across multiple ad networks.

Mixpanel

Analytics platform to analyze the users.

Countly

Open source mobile & web analytics, push notifications and crash reporting platform, based on Node.js, MongoDB and Linux.

CleverTap

Analytics platform and user-engagement platform with 1 million free events

Maps

Google-Directions-Android

Allows you to calculate the direction between two locations and display the route on a Google Map using the Google Directions API.

Android Maps Extensions

Extending capabilities of Google Maps Android API v2, adding marker clustering among other things

MapScaleView

Scale bar for Google Maps Android API

GLMap

Crossplatform offline vector map with MapCSS styling. Offline search and offline navigation are included.

Utility

Conceal SharedPreferences

Secured Preferences using Facebook Secure Encryption called Conceal.

EventBus

EventBus is a library that simplifies communication between different parts of your application.

Otto

Event Bus for Android.

Weak handler

Memory safer implementation of android.os.Handler.

Byte Buddy

Runtime code generation library with support for Android.

Secure Preference Manager

Secure Preference Manager for android. It uses various Encryption to protect your application's Shared Preferences.

LeakCanary

Catch memory leaks as they occur.

Drekkar

An Android event bus for WebView and JS.

Androl4b

A vm for assessing android applications.

DroidMVP

Android library to help you incorporate MVP along with Passive View and Presentation Model patterns into your app.

EasyDeviceInfo

Get device information in a super easy way.

Shutter-Android

Capture photos/videos from device camera or get photos/video from gallery app with no runtime permissions needed.

Validator

An utilities class to validate text inside TextInputLayout.

Keyboard Visibility Event

A DSL to handle soft keyboard visibility change event.

TimeIt

A stopwatch library for android which makes it easy to start, pause, display and maintain multiple stopwatches in an app.

Reactor

Reactor is a fast and secure key-value library for Android.

Debugging Tools

Linx

Show logcat inside the device for debug builds

Scalpel

View the entire hierarchy in 3d in the phone.

Stetho

Debug hierarchy and network from chrome.

Android Debug Database

Android Debug Database is a powerful library for debugging databases and shared preferences in Android applications.

Android Debug Bridge - ADB

a command-line tool to assist in debugging Android-powered devices

ADB Enhanced

a command-line wrapper around ADB for developers, so that, developers don't have to remember esoteric version-dependent commands

Pidcat

a colored command-line ADB wrapper that only shows log entries for a specific application package

AppSpector

Remote Android and iOS debugging and data collection service. You can debug networking, logs, SQLite and mock device's geo location.

Wireless

SmartGattLib

Simplifies the work with Bluetooth SMART devices (a.k.a. Bluetooth Low Energy in Bluetooth 4.0).

Chat & Messaging

Applozic Android Chat SDK

Android Chat and Messaging SDK for adding real time chat and in-app messaging into your android application.

Qiscus SDK

Qiscus SDK is a lightweight and powerful android chat library. Qiscus SDK will allow you to easily integrating Qiscus engine with your apps to make cool chatting application.

Kommunicate Live Chat SDK

Kommunicate provides open source live chat sdk in android. Kommunicate lets you add real time live chat and in-app messaging in your mobile (android, iOS) applications and website for customer support.

CometChat Voice, Video and Text Chat SDK with UI

Add voice, video and text chat to your app (and website) in minutes using CometChat. CometChat's SDK includes a complete ready UI so that you don't have to spend any time building one! That's not all, CometChat has out-of-the-box support for real-time translation, whiteboards, screen sharing, friends sync, role based access control, credits deduction and more.

Build a one-on-one Android chat app using Kotlin

Build a one-one-one Android chat app in Kotlin within few minutes using CometChat Pro. This tutorial discusses the features such as login, getting list of contacts, user presence indicators, sending/receiving messages etc.

Stream Chat

Comprehensive SDK & Components for real-time chat, powered by [Stream](https://getstream.io/chat/).

Add Push Notifications to Your Android Chat App Using Kotlin

Add push notifications in your Android chat apps in Kotlin with the help of CometChat Pro and Firebase Cloud Messaging (FCM).

MediaRecorderDialog

Custom Dialog to record audio, store it and play it in your phone.

HijriDatePicker

offers a hijri (Islamic Calendar) Date Picker designed on Google's Material Design Principals For Pickers.

Noty

A simple library for creating animated alerts/dialogs/warnings.

Custom Dialog

Version Checking

AppUpdater - comprehensive and feature rich library, including support for checks at Amazon and FDroid.
Gandalf - comprehensive features and a "companion" iOS solution.
Siren - focused feature set that mimicks the popular iOS library of the same name. Supports Play and Amazon.
Fit - version checking callback framework with no UI.

Date & Time

ThreeTen Android Backport

An adaptation of the JSR-310 backport for Android.

Joda-Time Android

Joda-Time library with Android specialization.

True Time

Android NTP time library. Get the true current time impervious to device clock time changes.

Runtime Permissions

Permission Dispatcher

Simple annotation-based API to handle runtime permissions.

RxPermissions

Android runtime permissions powered by RxJava.

NoPermission

Simple Android library for permissions request. Consists of only one class.

Ask-Permission

Simple RunTime permission manager.

Gota

Simplifying Android Permissions.

EasyPermissions

EasyPermissions is a wrapper library to simplify basic system permissions logic when targeting Android M or higher.

Payments

Square In-App Payments for Android

Integrate Square payments into your mobile app with Digital wallet and stored card support for quick checkout.

Other

Licensee

Licensee is a Gradle plugin which validates the licenses of your dependency graph match what you expect, or it fails your build!

Android Support library

The Android Support Library package is a set of code libraries that provide backward-compatible versions of Android framework API.

Google Play Services

Library to access Google services, such as account syncing, Google+ (sharing, single sign-on), Google Maps, Location APIs, Google Play Games, Cloud Messaging, Android Device Manager, and others.

Tape

A lightning fast, transactional, file-based FIFO for Android and Java.

Guava: Google Core Libraries for Java

Collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and so forth.

Android Scripting

Allows to run scripting languages on Android.

Android Priority Job Queue

Implementation of a Job Queue to easily schedule jobs (tasks) that run in the background, improving UX and application stability.

RateMeMaybe

Asks the user if (s)he wants to open the Play Store to rate your application.

Easy Rating Dialog

Lib provides a simple way to display an alert dialog for rating app.

ZXing Android-Integration

Integration with Barcode Scanner via Intent.

Gradle Retrolambda Plugin

Java 8 Lambdas on Android!

RxAndroid

Adds minimum RxJava bindings for easy writing of reactive Android java code.

Caffeine

A collection of utility classes that help make Android development faster.

AboutLibraries

Automatically generates an About this app section, with a list of used libraries.

AudioPlayerView

A view that loads audio from an url and have basic playback tools.

andle

command line tool help you sync dependencies, sdk or build tool version.

Typography

An Android library that makes it easy to use custom fonts in views.

Calligraphy

Custom fonts in Android an OK way.

transai

command line tool help you manage localization string files.

Android-Link-Preview

It makes a preview from an url, grabbing all the information such as title, relevant texts and images.

Sensey

Detecting gestures in a snap.

UserAwareVideoView

A customized video view that will automatically pause video is user is not looking at device screen!

Flexbox Layout

FlexboxLayout is a library which brings the similar capabilities of CSS Flexible Box Layout Module to Android.

Agile Boiler Plate

The boiler plate is based on MVP architecture and it is fully based on Dependency Injection design pattern using Dagger2.

Gradle buildSrcVersions

A kotlin dsl to simplify dependencies management

Teller

Teller facilitates the downloading, saving, and reading of the cached data of your app. Keep your user's data fresh and remove those annoying loading screens!

RxJava- RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
RxBinding- RxBinding – RxJava binding APIs for Android UI widgets from the platform and support libraries.

Resources

Programming Community Curated Resources for Learning Android Development

Android Tutorials & Courses submitted and voted by the programming community.

Vogella Tutorials

Very good tutorials by Lars Vogel.

Android DevBytes Video Series

It is the technical counterpart of Android Design in Action series.

Developing for Android

A series of articles from Googler Chet Hasae and others, answering most commonly asked question: "What are some of the important rules to keep in mind when developing Android applications?".

Android Hive Tutorials

Very good tutorials for beginners.

Android Weekly

Newsletter with weekly information about android.

Android Asset Studio

Generator for icons and other assets.

Device Art Generator

Wraps app screenshots in real device artwork.

Android UI design resources

Gives you wide variety of design resources form a Google Developer Expert in UI/UX.

Pencil Project

An open source prototyping software.

How to Make Android Apps

Video tutorials by Derek Banas.

android-blogs

List with blogs about Android.

Future Studio

Extensive Android tutorials on Retrofit, Picasso, Glide & Gson.

Android Tips & Tricks

Cheatsheet about tips and tricks for Android Development.

Associate Android Developer Certification Materials

A collection of materials for getting ready for the test.

Google Developers Training

Google Developers Official Training page has list of various useful learning resources for beginner as well seasoned developer.

Mindorks

Become a complete and happy Android developer.

AndroidVille

Become a better Android Engineer. A website dedicated to Android Development covering advanced topics such as RxJava, Android Zygote and much more.

Android Stack Weekly

A weekly newsletter on new development and updates of Android universe.

Android Design in Action Video series The video series by Android Design Team of Google.
Android Action Bar Style Generator.

Code examples

Android Architecture Blueprints

The Android Architecture Blueprints project demonstrates strategies to help solve or avoid common android problems.

Kotlin MVVM example

Example about MVVM (Model View ViewModel) Pattern.

Kotlin VIPER example

Example about VIPER (View Interactor Presenter Entity Router) Pattern.

Complete-Google-Map-API-Tutorial

Learn How to use Google Map API for Android from Basic to Advance with complete examples.

Android Modular Architecture

Android Sample App using modular, clean, scalable, testable Architecture written in Kotlin following the best practices with Jetpack.

Podcasts

Talking Kotlin

A Podcast on Kotlin and more.

Android Central

is a weekly Android podcast hosted by the Android Central team.

Fragmented is the Android developer podcast where Donn Felker and Kaushik Gopal talk about building good software and becoming better Android developers.
Android Developers Backstage is a podcast by and for Android developers. Hosted by developers from the Android engineering team, this show covers topics of interest to Android programmers, with in-depth discussions and interviews with engineers on the Android team at Google.
Android Dialogs is a video based podcast, where they have bite-sized conversations with people from the Android community.
The Context a podcast about Android Development with Hannes Dorfmann, Artem Zinnatullin and wonderful guests!
Android Authority is a weekly Android podcast hosted by Adam Doud, Joe Hindy, and Jonathan Feist from the Android Authority team.

More lists of libraries

The Android Arsenal

Large list of android libraries

Square libraries

Multiple high quality libraries by square.

Awesome Android @LibHunt

Your go-to Android Toolbox.

Android Store

Search Android Libraries, Projects, and Tools.

Development Alternatives

My personal recommendation is (for now) to use the android api to build a native app. Scala can help to build this native apps with cleaner code but it adds to many methods (Multidex required). Kotlin is a modern language with 100% interoperatibility with java projects without multidex. But there are also use cases where alternatives like cross-platform development can be useful.