Extensive Open-Source Guides for Android Developers

Open-Source Android Apps

Example of loading contacts into a listview using Content Providers

SQLiteOpenHelper and Basic Networking Sample Android App

Demo of app exercises for Intro to Android

Floating Action Button for Android based on Material Design specification

A vCard parser library for Java

Android app for interacting with pixelfed.social platform. Viewing, interacting, uploading of images from a device.

Casual ability game

Flym News Reader is a light Android feed reader (RSS/Atom)

Loop Habit Tracker, a mobile app for creating and maintaining long-term positive habits

lichess.org mobile application

Track your favorite TV shows and movies on Android devices.

Official Android app for Mastodon

Easy and quick contact management with no ads, handles groups and favorites too.

An Android application for streaming music from YouTube Music.

Fully featured, open source, privacy friendly email app for Android

Official Todo.txt Android app for managing your todo.txt file stored in Dropbox.

Cryptomator for Android

A productivity app that combines pomodoro timers and flow techniques to boost focus and efficiency.

Privacy Friendly App for creating and managing notes on Android.

Privacy Friendly App to create and manage shoppings lists on Android devices.

Material Design file manager for Android

Android RSS reader app

Android mobile git client for syncing a repository between remote and a local directory

An Android application for Bookwyrm. Basically, it is just bookwyrm put into a 'webview' element.