Called after Activity.OnStop when the current activity is being re-displayed to the user (the user has navigated back to it). It will be followed by Activity.OnStart and then Activity.OnResume.
For activities that are using raw Android.Database.ICursor objects (instead of creating them through Activity.ManagedQuery(Android.Net.Uri, System.String[], System.String[], System.String[], System.String[]), this is usually the place where the cursor should be requeried (because you had deactivated it in Activity.OnStop.
Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown.