Manual Installation. Installing Xamarin.Android for Windows involves six steps: Download and install the Java 1.6 (Java 6) or Java 1.7 (Java 7) JDK.
The JRE is not sufficient. The Android SDK requires the 32 bit JDK, that is, select "Windows" for your platform, not "Windows x64". Download the Android SDK from Google: Download Windows SDK installer (e.g. installer_r10-windows.exe) from: Run the installer. Getting Started with Android. Welcome to Xamarin.Android!
Once the installation is complete, follow these simple instructions to write and test your first Android C# code in minutes! You can also visit our Developer Center. 1.1. Running the Sample Application First, let’s open the Tasky sample application, which can be done in either Xamarin Studio or Visual Studio. Xamarin: Build apps with C# and .NET for iOS, Android, Mac and Windows.