Simple-Calendar - A simple calendar with events, customizable widget and no ads.

•    Kotlin

A simple calendar with events and a customizable widget.An offline calendar without any other calendar integration. You can easily create recurring events and setup reminders, it can also display week numbers.

scaloid - Scaloid makes your Android code easy to understand and maintain.

•    Scala

Scaloid is a library that simplifies your Android code. It makes your code easy to understand and maintain by leveraging Scala language."Being practically simple" is number one principle of Scaloid. Most frequently used things should be written shorter, like Huffman coding. To do this, I first observed Android programs I wrote, and thought that which part of the code is more fundamental than others. For example, what is the most essential part of buttons? Buttons should have some visible things on it, such as title or image, so the buttons are created like this: SButton("Hello"). The second essential part is doing something when it is pressed: SImageButton(R.drawable.hello, toast("World!")). What should be the third one? The answer might not the same for every people, but I think that repetition frequency of press-and-hold action is nice: SButton("Add", n += 1, 500) increases n for every 500 milliseconds when the user holds the button.

dev-setup - Mac OS X development environment setup: Easy-to-understand instructions with automated setup scripts for developer tools like Vim, Sublime Text, Bash, iTerm, Python data analysis, Spark, Hadoop MapReduce, AWS, Heroku, JavaScript web development, Android development, common data stores, and dev-based OS X defaults

•    Python

dev-setup is geared to be more of an organized reference of various developer tools.You're not meant to install everything.

android-best-practices - Do's and Don'ts for Android development, by Futurice developers

Avoid reinventing the wheel by following these guidelines. Lessons learned from Android developers in Futurice. If you are interested in iOS or Windows Phone development, be sure to check also our iOS Good Practices and Windows App Development Best Practices documents. Place your Android SDK somewhere in your home directory or some other application-independent location. Some distributions of IDEs include the SDK when installed, and may place it under the same directory as the IDE. This can be bad when you need to upgrade (or reinstall) the IDE, as you may lose your SDK installation, forcing a long and tedious redownload.

Android-Next - Android Next 公共组件库

•    Java

Android Next 公共组件库

awesome-kotlin - A curated list of awesome Kotlin frameworks, libraries, documents and other resources

A curated list of awesome Kotlin frameworks, libraries, documents and other resources.

android-clean-architecture-boilerplate - An android boilerplate project using clean architecture

•    Kotlin

Note: The use of clean architecture may seem over-complicated for this sample project. However, this allows us to keep the amount of boilerplate code to a minimum and also demonstrate the approach in a simpler form. The sample app when run will show you a simple list of all the Bufferoos (Buffer team members!).

AndroidTraining - Training course repository for android app development

•    Java

Code released under the Apache License, Version2.0. Docs released under Creative Commons Attribution 4.0 International License.

AboutLibraries - AboutLibraries is a library to offer some information of libraries.

•    Java

The AboutLibraries library allows you to easily create an used open source libraries fragment/activity within your app. As an extra feature you can also add an about this app section. Most modern apps feature a "Used Library"-section, which requires information about those respective libs. As it gets annoying to always copy those strings to your app, I've developed this small helper library to provide the required information.

Android-Iconics - Android-Iconics - Use any icon font, or vector (

•    Java

If you are an app developer you will know the problem. You start an app but require many different icons, in different sizes (ldpi, mdpi, hdpi, xhdpi, xxhdpi, xxxhdpi), different colors, and different variants. If you get the icons as vector (.svg) or there are many changes over the time, you will always have to get the correct drawables again. Now there's an easy, fast, and small solution for this! The Android-Iconics library.

FastAdapter - The bullet proof, fast and easy to use adapter library, which minimizes developing time to a fraction

•    Java

The RecyclerView is one of the most used widgets in the Android world, and with it you have to implement an Adapter which provides the items for the view. Most use cases require the same base logic, but require you to write everything again and again. The FastAdapter is here to simplify this process. You don't have to worry about the adapter anymore. Just write the logic for how your view/item should look like, and you are done. This library has a fast and highly optimized core which provides core functionality, most apps require. It also prevents common mistakes by taking away those steps from the devs. Beside being blazing fast, minimizing the code you need to write, it is also really easy to extend. Just provide another adapter implementation, hook into the adapter chain, custom select / deselection behaviors. Everything is possible.

MaterialDrawer - The flexible, easy to use, all in one drawer library for your Android project.

•    Java

If any (or all) of these questions seem familiar, the MaterialDrawer is the perfect library for you all. Never waste your time again. It provides you with the easiest possible implementation of a navigation drawer for your application. There is a Header with profiles (AccountHeader), a MiniDrawer for Tablets (like Gmail), provide custom DrawerItems, custom colors, custom themes, ... No limits for customizations.

android-tips-tricks - :ballot_box_with_check: [Cheatsheet] Tips and tricks for Android Development

•    Java

This is a simple set of tips and tricks regarding Android Development which I have gathered from various sources. It helps me direct other android devs in my community regarding stuff each android dev should know about. It is also there for me to keep track of anything I either learn on my own or from other sources now and then when browsing the internet. Contributions are always welcome, hoping people will help me in growing this. To contribute, simply open up a PR with the changes.

awesome-android - A curated list of awesome Android packages and resources.

A curated list of awesome Android libraries and resources. For general Java libraries have a look at awesome-java. 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.

awesome-android-complete-reference - Awesome Android references for everything like best practices, performance optimization, etc

•    Java

A curated list of Android Complete References at one place. A complete reference for android developers. Here you can find references about everything you use while Android Development. To the extent possible under law, Amit Shekhar has waived all copyright and related or neighboring rights to this work.

android-oss - Kickstarter for Android. Bring new ideas to life, anywhere.

•    Java

Welcome to Kickstarter's open source Android app! Come on in, take your shoes off, stay a while—explore how Kickstarter's native squad has built and continues to build the app, discover our implementation of RxJava in logic- filled view models, and maybe even create an issue or two. We've also open sourced our iOS app, written in Swift: check it out here. Read more about our journey to open source here.

Alerter - An Android Alerting Library

•    Kotlin

This library aims to overcome the limitations of Toasts and Snackbars, while reducing the complexity of your layouts. With simplicity in mind, the Alerter employs the builder pattern to facilitate easy integration into any app. A customisable Alert view is dynamically added to the Decor View of the Window, overlaying all content.

FancyShowCaseView - An easy-to-use customisable show case view with circular reveal animation.

•    Java

An easy-to-use customizable show case view with circular reveal animation. Please see wiki for more samples.

AndroidStandardDevelop - :star2: Best practices in Android develop(final).

:star2: Best practices in Android develop(final).

Kotlin-for-Android-Developers - Companion App for the book

•    Kotlin

This is the code you can use to follow the book. Are you tired of using an ancient, inexpressive and unsafe language to develop your Android apps? Do you cry out loud every time you see a Null Pointer Exception in your bug tracker? Then Kotlin is your solution! A language specifically created for Java developers, easy to learn, expressive, null safe and really intuitive. Your productivity will boost and your apps will become more robust. Learn Kotlin the easy way by example and discover the tricks that will make coding easier.