1.安装jdk
Download the Java JDK v1.7.0 installer to any directory on your disk, double-click the downloaded file and follow the on-screen instructions.
It is very important to install the 32-bit version of Java JDK even if you're using 64-bit Windows. It is also important that Java JDK v1.6 is installed (although it is fine to have Java JDK 1.7 or newer installed at the same time)
2.安装sdk manager 然后下载sdk版本，必须安装三个工具，以及sdk api15 19 21三个版本
Download the Android SDK for Windows version 24.4.1 to any directory on your disk and double-click it to start main SDK installation process. You can install the SDK either system wide or only for your account. You will need to point your IDE to that location after the installation is completed.
Click here in order to start the Android SDK Manager application. In the GUI make sure the following components are installed or selected for installation:
- Android SDK Tools
- Android SDK Platform-tools
- Android SDK Build-tools
- Android API 15
- Android API 19
- Android API 21
3.安装NDK 下载了直接解压就可以了
Download the Android NDK for Windows version r10e to any directory on your disk and double-click it to start the NDK installation.
When the Android SDK installation is finished you might want to start the Android Emulator Manager and create as many emulator images as you might need for your development. This step can be performed at any time, on an as-needed basis.
4.安装Xamarin
Download the Xamarin v4.1.0 installer to any directory on your disk, double-click it and follow the on-screen instructions.
After installation, restart your Windows workstation to make sure all of the installed system services are running.
5.安装完毕后，检查vs2015 xamarin设置的路径是否正确
6.最后新建安卓项目 貌似没有发生什么问题
