open source graph plotting library for Android
http://www.android-graphview.org/
https://github.com/jjoe64/GraphView
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for Xamarin (unofficial) - info got by https://forums.xamarin.com/discussion/50719/binding-android-graph-view-missing-some-classes
https://github.com/nguyenngocdungcs/GraphViewBinding
http://www.android-graphview.org/
https://github.com/jjoe64/GraphView
--
for Xamarin (unofficial) - info got by https://forums.xamarin.com/discussion/50719/binding-android-graph-view-missing-some-classes
https://github.com/nguyenngocdungcs/GraphViewBinding