to use the mpos on android you have to first make the hybrid app.
follow the below steps
Pre-requisites
ï‚· Recommended: a physical Windows computer (not a VM) running Windows 8 or later
 You can use a computer with Windows 7 or earlier, in which case you’ll use the Xamarin Player
for Android as the emulator
Steps--
Open Control Panel > Programs and Features, choose the Visual Studio 2015 item, and click Change.
When the installer opens, click Modify
1. Cross-Platform Mobile Development > C#/.NET (Xamarin). This will also automatically
select various Android tools under Common Tools and Software Development Kits. This
option should also update any existing Xamarin installation. Select all Common Tools
and Software Development Kits
Click the Install button and let the process run. Again, this will take some time to
complete
2. Once installation is complete, launch Visual Studio and sign in with your Microsoft account if
prompted (this is the same account you use with Windows). Then check for Xamarin updates
through Tools > Options > Xamarin or Tools > Options > Xamarin > Other, where you’ll find a
Check Now link:
If you do not see an option for Xamarin in Tools > Options, double-check your installation, or try
restarting Visual Studio. You can also search for Xamarin in the Options dialog. Download and
install latest version.
3. From the Build Take Retail SDK folder and Open SampleExtensions\HybridApp\Android\ solution
and build/deploy on emulator and verify.
4. On Emulator, please enter Retail Server URL and save.
5. You should be able to login and activate the device.
