The Duktape embeddable Javascript engine packaged for Android.
This library is a simple interface to facilitate the way to graph points in a Cartesian plane, additionally you can create simple polygons, it was done with the native app of Canvas.
The Android Decompile is a script that combines different tools for successfully decompiling any Android package (APK) to it's Java source-code and resources (including the AndroidManifest.xml, 9-patches, layout files, etc.).