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Chameleon is a CSS like framework for Android. Chameleon can read styles in JSON format and apply them on views in Android. Not only can you choose from the variety of styles provided by the library but also add your own styles by changing just one file.

The icing on the cake is, once set up, themes can be updated without pushing a new version of your app to the playstore. So, your users can see your changes on the fly.

An extended ViewPager that has the below features:

• allows its Fragment pages to get notified when they are actually visible/invisible to the user
• supports multiple levels of FragmentViewPagers
• provides methods to control its paging

A material Date Range Picker.