Get started with <code>GraphLib</code>, an open source library for graphing mathematical functions, plotting points, and drawing line graphs in Android.

Learn to code a simple Android widget that can be updated automatically (after a time period), or in response to user action. Full source code included.

If you followed along in Part 2, you’ve already loaded your source code and resource files into your Android Studio project. Now you’re ready to build the app for the first time.