Add support for Android Activity/Fragments

Author: anaisbetts

ReactiveUI.Platforms/Android/ReactiveActivity.cs

@@ -18,14 +18,15 @@
 using System.Diagnostics.Contracts;
 using System.Runtime.CompilerServices;
 using Splat;
+using System.Reactive;
 
 namespace ReactiveUI.Android
 {
     /// <summary>
     /// This is an Activity that is both an Activity and has ReactiveObject powers 
     /// (i.e. you can call RaiseAndSetIfChanged)
     /// </summary>
-    public class ReactiveActivity<TViewModel> : ReactiveActivity, IViewFor<TViewModel>, IReactiveNotifyPropertyChanged, IHandleObservableErrors
+    public class ReactiveActivity<TViewModel> : ReactiveActivity, IViewFor<TViewModel>, ICanActivate
         where TViewModel : class, IReactiveNotifyPropertyChanged
     {
         protected ReactiveActivity() { }
@@ -235,6 +236,24 @@ public void RaisePropertyChanging([CallerMemberName] string propertyName = null)
         {
             raisePropertyChanging(propertyName);
         }
+
+        readonly Subject<Unit> activated = new Subject<Unit>();
+        public IObservable<Unit> Activated { get { return activated; } }
+
+        readonly Subject<Unit> deactivated = new Subject<Unit>();
+        public IObservable<Unit> Deactivated { get { return deactivated; } }
+
+        protected override void OnPause()
+        {
+            base.OnPause();
+            deactivated.OnNext(Unit.Default);
+        }
+                
+        protected override void OnResume()
+        {
+            base.OnResume();
+            activated.OnNext(Unit.Default);
+        }
     }
 }
 

ReactiveUI.Platforms/Android/ReactiveFragment.cs

@@ -19,14 +19,15 @@
 using System.Diagnostics.Contracts;
 using System.Runtime.CompilerServices;
 using Splat;
+using System.Reactive;
 
 namespace ReactiveUI.Android
 {
     /// <summary>
     /// This is a Fragment that is both an Activity and has ReactiveObject powers 
     /// (i.e. you can call RaiseAndSetIfChanged)
     /// </summary>
-    public class ReactiveFragment<TViewModel> : ReactiveFragment, IViewFor<TViewModel>, IReactiveNotifyPropertyChanged, IHandleObservableErrors
+    public class ReactiveFragment<TViewModel> : ReactiveFragment, IViewFor<TViewModel>, ICanActivate
         where TViewModel : class, IReactiveNotifyPropertyChanged
     {
         protected ReactiveFragment() { }
@@ -235,5 +236,23 @@ public void RaisePropertyChanging([CallerMemberName] string propertyName = null)
         {
             raisePropertyChanging(propertyName);
         }
+
+        readonly Subject<Unit> activated = new Subject<Unit>();
+        public IObservable<Unit> Activated { get { return activated; } }
+
+        readonly Subject<Unit> deactivated = new Subject<Unit>();
+        public IObservable<Unit> Deactivated { get { return deactivated; } }
+
+        public override void OnPause()
+        {
+            base.OnPause();
+            deactivated.OnNext(Unit.Default);
+        }
+                
+        public override void OnResume()
+        {
+            base.OnResume();
+            activated.OnNext(Unit.Default);
+        }
     }
 }

ReactiveUI/Interfaces.cs

@@ -446,8 +446,8 @@ public interface ISupportsActivation
 
     public interface ICanActivate
     {
-        public IObservable<Unit> Activated { get; }
-        public IObservable<Unit> Deactivated { get; }
+        IObservable<Unit> Activated { get; }
+        IObservable<Unit> Deactivated { get; }
     }
 
     /// <summary>