(+) Added ContextHelper to Android

(+) Implemented MessageService for Android

Author: GeertvanHorrik

src/Catel.Core/Catel.Core.NET40/Services/LanguageService.android.cs

@@ -9,7 +9,7 @@
 namespace Catel.Services
 {
     using System.Globalization;
-    using Android.Content.Res;
+    using global::Android.Content.Res;
 
     public partial class LanguageService
     {
@@ -41,7 +41,7 @@ protected override string GetString(ILanguageSource languageSource, string resou
             //var element = stringsXmlDocument.XPathSelectElement(xpath);
             //return element.Value;
 
-            var context = global::Android.App.Application.Context;
+            var context = Android.ContextHelper.CurrentContext;
             var packageName = context.PackageName;
 
             var id = context.Resources.GetIdentifier(resourceName, "string", packageName);

src/Catel.Core/Catel.Core.Xamarin.Android/Android/Helpers/ContextHelper.cs

@@ -0,0 +1,39 @@
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="ContextHelper.cs" company="Catel development team">
+//   Copyright (c) 2008 - 2014 Catel development team. All rights reserved.
+// </copyright>
+// --------------------------------------------------------------------------------------------------------------------
+
+
+namespace Catel.Android
+{
+    using global::Android.Content;
+
+    /// <summary>
+    /// The context helper.
+    /// </summary>
+    public static class ContextHelper
+    {
+        private static Context _context;
+
+        /// <summary>
+        /// Gets or sets the current context.
+        /// <para />
+        /// Note that the setter is made public to allow customization. It will be used primarily by Catel though.
+        /// </summary>
+        /// <value>The current context.</value>
+        public static Context CurrentContext
+        {
+            get
+            {
+                if (_context == null)
+                {
+                    _context = global::Android.App.Application.Context;
+                }
+
+                return _context;
+            }
+            set { _context = value; }
+        }
+    }
+}

src/Catel.Core/Catel.Core.Xamarin.Android/Catel.Core.Xamarin.Android.csproj

@@ -962,13 +962,15 @@
     <Compile Include="..\Catel.Core.NET40\WeakReferences\WeakEventListener.cs">
       <Link>WeakReferences\WeakEventListener.cs</Link>
     </Compile>
+    <Compile Include="Android\Helpers\ContextHelper.cs" />
   </ItemGroup>
   <ItemGroup>
     <Content Include="FodyWeavers.xml" />
   </ItemGroup>
   <ItemGroup>
     <None Include="packages.config" />
   </ItemGroup>
+  <ItemGroup />
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
   <Import Project="..\..\..\lib\Fody.1.22.1\build\Fody.targets" Condition="Exists('..\..\..\lib\Fody.1.22.1\build\Fody.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">

src/Catel.MVVM/Catel.MVVM.NET40/MVVM/Navigation/NavigationAdapter.phone.android.cs

@@ -8,6 +8,7 @@
 namespace Catel.MVVM.Navigation
 {
     using System;
+    using Android;
     using Logging;
     using global::Android.App;
     using global::Android.OS;
@@ -229,6 +230,8 @@ partial void Initialize()
                 var eventArgs = new NavigatedEventArgs(GetNavigationUri(activity), NavigationMode.New);
                 RaiseNavigatedTo(eventArgs);
             }
+
+            ContextHelper.CurrentContext = activity;
         }
 
         partial void Uninitialize()

src/Catel.MVVM/Catel.MVVM.NET40/Services/AccelerometerService.android.cs

@@ -97,7 +97,7 @@ public override IAccelerometerValue GetCurrentValue()
 
         partial void Initialize()
         {
-            var context = Application.Context;
+            var context = Catel.Android.ContextHelper.CurrentContext;
             _sensorManager = context.GetSystemService(Context.SensorService) as SensorManager;
             _sensor = _sensorManager.GetDefaultSensor(SensorType.Accelerometer);
 

src/Catel.MVVM/Catel.MVVM.NET40/Services/LocationService.android.cs

@@ -118,7 +118,7 @@ private void OnLocationChanged(object sender, EventArgs e)
         /// </summary>
         protected override void Initialize()
         {
-            var context = Application.Context;
+            var context = Catel.Android.ContextHelper.CurrentContext;
             _locationManager = context.GetSystemService(Context.LocationService) as LocationManager;
 
             _locationListener = new LocationListener();

src/Catel.MVVM/Catel.MVVM.NET40/Services/MessageService.android.cs

@@ -9,6 +9,7 @@
 namespace Catel.Services
 {
     using System;
+    using global::Android.App;
 
     public partial class MessageService
     {
@@ -23,7 +24,41 @@ public partial class MessageService
         /// <exception cref="ArgumentException">The <paramref name="message"/> is <c>null</c> or whitespace.</exception>
         protected virtual MessageResult ShowMessageBox(string message, string caption = "", MessageButton button = MessageButton.OK, MessageImage icon = MessageImage.None)
         {
-            throw new MustBeImplementedException();
+            var messageResult = MessageResult.Cancel;
+            var context = Catel.Android.ContextHelper.CurrentContext;
+            var builder = new AlertDialog.Builder(context);
+
+            switch (button)
+            {
+                case MessageButton.OK:
+                    builder.SetPositiveButton("OK", (sender, e) => { messageResult = MessageResult.OK; });
+                    break;
+
+                case MessageButton.OKCancel:
+                    builder.SetPositiveButton("OK", (sender, e) => { messageResult = MessageResult.OK; });
+                    builder.SetCancelable(true);
+                    break;
+
+                case MessageButton.YesNo:
+                    builder.SetPositiveButton("Yes", (sender, e) => { messageResult = MessageResult.Yes; });
+                    builder.SetNegativeButton("No", (sender, e) => { messageResult = MessageResult.No; });
+                    break;
+
+                case MessageButton.YesNoCancel:
+                    builder.SetPositiveButton("Yes", (sender, e) => { messageResult = MessageResult.Yes; });
+                    builder.SetNegativeButton("No", (sender, e) => { messageResult = MessageResult.No; });
+                    builder.SetCancelable(true);
+                    break;
+
+                default:
+                    throw new ArgumentOutOfRangeException("button");
+            }
+
+            builder.SetMessage(message).SetTitle(caption);
+
+            builder.Show();
+
+            return messageResult;
         }
     }
 }

src/Catel.MVVM/Catel.MVVM.NET40/Services/NavigationService.android.cs

@@ -105,7 +105,7 @@ partial void NavigateForward()
 
         partial void NavigateWithParameters(string uri, Dictionary<string, object> parameters)
         {
-            var context = Application.Context;
+            var context = Catel.Android.ContextHelper.CurrentContext;
 
             var navigationTargetType = TypeCache.GetType(uri);
             var intent = new Intent(context, navigationTargetType);

src/Catel.MVVM/Catel.MVVM.NET40/Services/NavigationService.ios.cs

@@ -101,7 +101,7 @@ partial void NavigateForward()
         partial void NavigateWithParameters(string uri, Dictionary<string, object> parameters)
         {
             throw new MustBeImplementedException();
-            //var context = Application.Context;
+            //var context = Catel.Android.ContextHelper.CurrentContext;
 
             //var navigationTargetType = TypeCache.GetType(uri);
             //var intent = new Intent(context, navigationTargetType);

src/Catel.MVVM/Catel.MVVM.NET40/Services/VibrateService.android.cs

@@ -9,7 +9,6 @@
 namespace Catel.Services
 {
     using System;
-    using global::Android.App;
     using global::Android.Content;
     using global::Android.OS;
 
@@ -19,7 +18,7 @@ public partial class VibrateService
 
         partial void Initialize()
         {
-            var context = Application.Context;
+            var context = Android.ContextHelper.CurrentContext;
             _vibrator = context.GetSystemService(Context.VibratorService) as Vibrator;
         }