Developing an application for Android platform is not only limited by using Java programming language anymore. C# also can be used for developing an Android application.
Book Description:
Xamarin Mobile Application Development is a hands-on Xamarin.Forms primer and a cross-platform reference for building native Android, iOS, and Windows Phone apps using C# and .NET. This book explains how to use Xamarin.Forms, Xamarin.Android, and Xamarin.iOS to build business apps for your customers and consumer apps for Google Play and the iTunes App Store.
Link:
https://mega.nz/#!N91FjBDI!SsZr_G4kX9GLVlI8oEMe7oovZqHYzAbozszCn9Huweo
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