In order to improve my skills on android development I always search for sample code and valueable apps from which learning new things. Here is my list of android apps I found with source code available. This post has been inspired from this article about great android apps that are also open source.
wall:splash
wall:splash is a free open source android client for the awesome Unsplash service (Free (do whatever you want) high-resolution photos) developed by Mike Penz.
Philm
Philm is a movie collection and information app created for Android by Chris Banes. It uses the Trakt and TMDB APIs.
Materialistic
Materialistic is an open-source Hacker News reader with material design look and feel developed by Ha Duy Trung using Hacker News API.
Omni-Notes
Very nice and usefull note taking application developed by Federico Iosue.
InstaMaterial
Implementation of Instagram with Material Design (based on Emmanuel Pacamalan’s concept).
Screeshots
Google I/O App
The Google I/O App is the official app intended to help you navigate the conference, whether you’re attending in-person or remotely. The other primary goal of the app is to serve as a practical example of best practices for Android app design and development.
Wordpress for Android
The power of WordPress.com and self-hosted WordPress.org sites on your hands.