Xamarin.Android - Messenger and Service
This solution is an example of IPC communication between an Android service and an Activity (using a Messenger and a Handler). It demonstrates how to perform one-way and two-way IPC calls between an Activity and a Service running in it's own process.
Ensure that the MessengerService project is installed on the device before the MessengerClient project. If the MessengerClient is inadvertently installed first, it will be necessary to uninstall it, install the MessengerService app, and then reinstall the MessengerClient project.
Note: Currently it is not possible to implement an IsolatedProcess in Xamarin.Android. Please see Bugzilla 51940 - Services with isolated processes and custom Application class fail to resolve overloads properly for more details.