Portal/Newsletter

• Android Arsenal - Android developer portal with tools, libraries, and apps
• Android Weekly - Android Weekly is a free newsletter that helps you to stay cutting-edge with your Android Development.
• Android Dev Digest - A Handcrafted Weekly #AndroidDev Newsletter.
• Android Dev Reddit - News for Android developers with the who, what, where when and how of the Android community.
• Google Developer Experts - Medium - Articles, tips/tricks and best practices by Google Developers Experts. It has posts for different technologies but you have to look for android specifically!
• Android Best Practices - Repository which has listed best practices for Beginner Android Developer
• Import Java - Weekly Java & Android Newsletter
• CodePath - CodePath Android Cliffnotes
• Android Developer Blog - Keep updated yourself with Official Android Developer Blog.

Debug

• Stetho - A debug bridge for Android applications
• Hugo - Annotation-triggered method call logging for your debug builds.
• 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.
• LeakCanary - A memory leak detection library for Android and Java.

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 developed by Square Inc.

Development tools

• JSON viewer - View JSON not response
• JSON editor - Create and view JSON
• JSON Plugin - Plugin that help your response to view in Formated JSON
• Angry Tools - Tools like CSS,Gradient,Android Button,Code for Email,Android Pixel Calculator and many more
• Android Asset Studio - Icon generators, Theme generator
• Device metrics(Google) - Select a device to view detailed information, recommended material design measurements, and values for portrait and landscape orientations.
• Find any shared logins(bugmenot.com) - Enter a website below to see if the bugmenot community has shared any logins for it…
• Generate POJO - Generate Plain Old Java Objects from JSON or JSON-Schema.
• Implement Parcelable - Implements Parcelable for your JAVA class. You can even use POJO class.
• Material Color Generator - Select Main color for your app theme and rest will be generated accordingly.
• Sort Text Lines - Enter your text/list for sorting here.
• Performance Analysis of App - Get a detailed analysis about performance, security and functionality.
• Material Palette Generator - Choose your favorite colors and get your Material Design palette generated and downloadable.
• Gradle, Please - Super Easy search for dependencies
• Methods Count - Android libraries are great, but they come at a cost. Use this tool to avoid the dreaded 65K method limit of the DEX file format!
• Android 9-patch shadow generator - Android 9-patch shadow generator fully customizable shadows
• Google Material design icons - Material icons for both Light and Dark themes, downloaded as either SVGs or PNGs.
• feature-graphic-generator - The Android Feature Graphic Generator allows you to easily create a simple yet attractive feature graphic for your Android application. It will generate a PNG image file according to Google’s guidelines. Afterwards you can upload the image to the Google Play Developer Console to spice up the listing of your Android app.
• Genymotion - Genymotion is a fast and easy-to-use Android emulator to run and test your Android apps
• HTML Color Codes (tool) - HTML Color Codes website provides free color tools for finding HTML colors, you can find color from image too.

Android Studio Plugins

• adb-idea - A plugin for Android Studio and Intellij IDEA that speeds up your day to day android development.
• android-butterknife-zelezny - Android Studio plug-in for generating ButterKnife injections from selected layout XML.
• ParcelableGenerator - IntelliJ Plugin for Android Parcelable boilerplate code generation.
• gradle-android-javadoc-plugin - Gradle plugin to generate Javadoc
• findViewByMe - A plugin for android developer, with the plugin you can generate “findViewById” code quickly.
• RoboPOJOGenerator - POJO Generator plugin for Kotlin in Android Studio.

Android Studio Templates

• Material-Template - Android-studio-material-template
• BaseProject-Template - Template for Base Project includes volley lib ,Image loading libs ,basic utils classes

Dependency Injection

• Dagger - Dependency injection framework for Java and Android.
• Butter Knife - View “injection” library for Android.
• RoboGuice - Dependency injection framework for Android.
• AndroidAnnotations - Java annotations with dependency injection at compile time.
• SwissKnife - A multi-purpose library containing view injection and threading for Android using annotations.
• Transfuse - A Dependency Injection and Integration framework for Google Android.

Network

• OkHttp - An HTTP & HTTP/2 client for Android and Java applications by Square, Inc.
• Retrofit - Type-safe HTTP client for Android and Java by Square, Inc.
• Volley - Google’s HTTP library that makes networking for Android apps easier and most importantly, faster.
• Android Asynchronous Http Client - An asynchronous callback-based Http client for Android built on top of Apache’s HttpClient libraries.

Image loading

• Picasso - A powerful image downloading and caching library for Android by Square, Inc.
• Glide - A powerful image downloading and caching library for Androidhttps://github.com/bumptech/glide
• Fresco - An Android library for managing images and the memory they use by Facebook
• Android Universal Image Loader - Powerful and flexible library for loading, caching and displaying images on Android.
• Glide Transformations - An Android transformation library providing a variety of image transformations for Glide.
• Picasso Transformations - An Android transformation library providing a variety of image transformations for Picasso
• Most memory efficient way to resize bitmaps on android? - An SO post by Colt McAnlis on most efficient way to resize bitmaps.

Application crash reporting

• Crashlytics with Fabric kit - A powerful crash reporting solution with statistics by Twitter
• Crittercism - Crittercism aka Apteligent - A powerful tool for crash reporting, user flows and service monitoring
• ACRA - ACRA is a library enabling Android Application to automatically post their crash reports to a GoogleDoc form.
• Firebase Analytics - Firebase Analytics is a free app measurement solution that provides insight on app usage and user engagement.

Bluetooth

• RxAndroidBLE - RxAndroidBle is a powerful painkiller for Android’s Bluetooth Low Energy headaches. It is backed by RxJava, implementing complicated APIs as handy reactive observables.

ORM NoSQL

• Realm - Realm is NoSQL Mobile Database
• 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.
• CouchBase - The NoSQL database solution for mobile — everything you need to build always-available apps that work online & offline.
• SnappyDB - A fast and lightweight key/value database library for Android

ORM SQL

• ActiveAndroid - Active record style SQLite persistence for Android.
• GreenDao - greenDAO is an open source project to help Android developers working with data stored in SQLite.
• Sugar ORM - Insanely easy way to work with Android Databases.

Charts & Graphs Libraries

• HelloCharts - Charts/graphs library for Android with support for scaling, scrolling and animations.
• WilliamChart - Flexible charting library with useful motion capabilities.
• AndroidPlot - plotting library for Android
• AndroidGraphView - library to create flexible and nice-looking diagrams
• AndroidCharts - Easy to use charts
• EazeGraph - Another newer library with potential
• HoloGraphLibrary - Newer graphing library
• AChartEngine - This is a charting software library for Android applications
• MPAndroidChart - A powerful Android chart view / graph view library

Helpful Libraries

• RxAndroid - Android specific bindings Reactive Extensions to write easy event-based and asynchronous programs using observable sequences.
• RxJava - Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
• RetroLamda - This plugin will automatically build your java or android project with retrolambda, giving you lambda goodness on java 6 or 7.
• Guava - The Guava project contains several of Google’s core libraries that we rely on in our Java-based projects: collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and so forth.
• ReDex - Android bytecode (dex) optimizer, It provides a framework for reading, writing, and analyzing .dex files

Event Bus

• AndroidEventBus - A lightweight eventbus library for android, simplifies communication between Activities, Fragments, Threads, Services, etc.
• EventBus - Android optimized event bus that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.
• tinybus - A lightweight and simple event bus optimized for Android.
• Drekkar - An Android event bus for WebView and JS.

Awesome Android Tips

• Awesome Android Tips
• Awesome Android Complete Refrence - Awesome Android Complete Refrence

### Open Resources Android

• open resources - an openly available directories containing usefull resources for android