Chapter 8. Customizing the User Interface

In the previous chapter, we learned how to incorporate platform-specific features into the TrackMyWalks application, depending on the mobile platform that is being run, as well as how to incorporate the NuGet package into the shared-core project solution.

You learned how to create a LocationService Interface and Class, which included a number of class instance methods used by our iOS and Android platforms to handle location-based features and obtain current GPS coordinates, as well as handling location updates in the background on the mobile device. You learned how to make relevant changes to both WalkEntryPageViewModel and WalkDistancePageViewModel to allow for location-based features to work, before moving on to creating a CustomMapOverlay class that will be used to display a native Map control, based on the current platform.

Lastly, you updated WalkDistancePage.xaml and the code-behind file to handle location updates so that it will automatically...