A simple lib to create a ring-like progress view with corner edges.
The simplest way to add reactive validation to your app.
Problem
in your application, there are fields that must be validated. When the number of validation rules becomes greater than 1, to control the display of errors in the fields becomes difficult.
Solve
Separate your validation logic by S in SOLID, into own classes. After that, attach validation rules to your fields and combine validation results for change some ui states (ex. change visibility of button)
Droidcon 2013 Gradle workshop is an example project. It shows how to write Unit and Integration tests.