friends caching

small improvements

main/Libs/WPImageCaching/ImageCache.cs

@@ -13,6 +13,7 @@ using System.Windows.Media.Imaging;
 using System.IO;
 using System.IO.IsolatedStorage;
 using System.Runtime.Serialization;
+using Microsoft.Phone;
 
 namespace WPImageCaching
 {
@@ -20,8 +21,66 @@ namespace WPImageCaching
     {
         private const string IMAGECACHEFILE = "imagecachefile.nfo";
         internal static Dictionary<string, ImageCacheItem> imageCache;
+        internal static object _lock = new object();
 
 
+        public static BitmapImage GetImage(string url)
+        {
+            BitmapImage image = new BitmapImage();
+            if (Environment.OSVersion.Platform == PlatformID.Win32NT)
+            {
+                //Wenn im Designmodus von Blend oder Visual Studio
+                image.UriSource = new Uri(url);
+                return image;
+            }
+
+            if (imageCache == null)
+            {
+                LoadCachedImageInfo();
+            }
+
+            //Prüfen auf ein vorhandenes gespeichertes Bild
+            if (imageCache.ContainsKey(url))
+            {
+                //Prüfen auf Gültigkeit des Bildes
+                if (DateTime.Compare(DateTime.Now, imageCache[url].Expiration) >= 0)
+                {
+                    ImageDownloadHelper.DownloadImage(url, image, imageCache[url]);
+                }
+                else
+                {
+                    if (IsolatedStorageFile.GetUserStoreForApplication().FileExists(imageCache[url].LocalFilename))
+                    {
+                        //Bild ist noch gültig
+                        using (IsolatedStorageFile isf =  IsolatedStorageFile.GetUserStoreForApplication())
+                        {
+                            lock (_lock)
+                            {
+                                using (
+                                    IsolatedStorageFileStream fs = isf.OpenFile(imageCache[url].LocalFilename,
+                                                                                FileMode.Open))
+                                {
+                                    image.SetSource(fs);
+                                    return image;
+                                }
+                            }
+                        }
+                    }
+                    else
+                    {
+                        ImageDownloadHelper.DownloadImage(url, image, imageCache[url]);
+                    }
+                }
+            }
+            else
+            {
+                //Bild noch nicht gespeichert
+                ImageCacheItem item = new ImageCacheItem();
+                ImageDownloadHelper.DownloadImage(url, image, item);
+            }
+            return image;
+        }
+
         public static BitmapImage GetImage(BitmapImage image)
         {
             string url = image.UriSource.ToString();
@@ -65,31 +124,49 @@ namespace WPImageCaching
         //Laden der Bildinformationen
         private static void LoadCachedImageInfo()
         {
-            if (IsolatedStorageFile.GetUserStoreForApplication().FileExists(IMAGECACHEFILE))
+            using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
             {
-                IsolatedStorageFileStream fs =
-                    IsolatedStorageFile.GetUserStoreForApplication().OpenFile(IMAGECACHEFILE,FileMode.Open);
+                lock (_lock)
+                {
+                    if (isf.FileExists(IMAGECACHEFILE))
+                    {
+                        using (IsolatedStorageFileStream fs = isf.OpenFile(IMAGECACHEFILE, FileMode.Open))
+                        {
+                            using (StreamReader sr = new StreamReader(fs))
+                            {
+                                string serObj = sr.ReadToEnd();
+                                imageCache = SerializationHelper.Deserialize<Dictionary<string, ImageCacheItem>>(serObj);
+                            }
 
-                DataContractSerializer dcs = new DataContractSerializer(typeof(Dictionary<string, ImageCacheItem>));
-                imageCache = (Dictionary<string, ImageCacheItem>)dcs.ReadObject(fs);
-                fs.Close();
-            }
-            else
-            {
-                imageCache = new Dictionary<string, ImageCacheItem>();
+                        }
+                    }
+                }
+                if (imageCache == null)
+                {
+                    imageCache = new Dictionary<string, ImageCacheItem>();
+                }
             }
         }
 
         //Speichern der Bildinformationen
         internal static void SaveCachedImageInfo()
         {
-            IsolatedStorageFileStream fs =
-                IsolatedStorageFile.GetUserStoreForApplication().CreateFile(IMAGECACHEFILE);
-
-            DataContractSerializer dcs = new DataContractSerializer(typeof(Dictionary<string, ImageCacheItem>));
-            dcs.WriteObject(fs, imageCache);
-            fs.Flush();
-            fs.Close();
+            using (IsolatedStorageFile sf = IsolatedStorageFile.GetUserStoreForApplication())
+            {
+                lock (_lock)
+                {
+                    if (sf.FileExists(IMAGECACHEFILE))
+                        sf.DeleteFile(IMAGECACHEFILE);
+                    using (IsolatedStorageFileStream fs = sf.CreateFile(IMAGECACHEFILE))
+                    {
+                        using (StreamWriter sw = new StreamWriter(fs))
+                        {
+                            string serObj = SerializationHelper.Serialize(imageCache);
+                            sw.Write(serObj);
+                        }
+                    }
+                }
+            }
         }
     }
 }

main/Libs/WPImageCaching/ImageCacheConverter.cs

@@ -23,6 +23,10 @@ namespace WPImageCaching
             {
                 return ImageCache.GetImage((BitmapImage)value);    
             }
+            if (value is string && !string.IsNullOrEmpty(value as string))
+            {
+                return ImageCache.GetImage((string)value);
+            }
             else
             {
                 return value;

main/Libs/WPImageCaching/ImageCacheItem.cs

@@ -8,14 +8,23 @@ using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Media.Animation;
 using System.Windows.Shapes;
+using System.Runtime.Serialization;
 
 namespace WPImageCaching
 {
     //Beinhaltet die Informationen eines Bildes
-    internal class ImageCacheItem
+    [DataContract]
+    public class ImageCacheItem
     {
+        public ImageCacheItem()
+        {
+        }
+
+        [DataMember]
         public string LocalFilename { get; set; }
+        [DataMember]
         public string ImageID { get; set; }
+        [DataMember]
         public DateTime Expiration { get; set; }
     }
 }

main/Libs/WPImageCaching/ImageDownloadHelper.cs

@@ -15,6 +15,7 @@ using System.Collections.Generic;
 using System.IO.IsolatedStorage;
 using System.IO;
 using System.Windows.Media.Imaging;
+using System.Diagnostics;
 
 namespace WPImageCaching
 {
@@ -35,7 +36,7 @@ namespace WPImageCaching
 
             //Erstellen der Abfrage
             var wc = (HttpWebRequest)HttpWebRequest.Create(url);
-            if (item.ImageID!=null)
+            if (item.ImageID != null)
             {
                 //Prüfen, ob das Bild im Web immer noch aktuell ist
                 wc.Headers["If-None-Match"] = item.ImageID;
@@ -62,53 +63,103 @@ namespace WPImageCaching
                 //Bild wurde nicht geändert seit dem letzten Aufruf
                 if (response.StatusCode == HttpStatusCode.NotModified)
                 {
-                    Deployment.Current.Dispatcher.BeginInvoke(() => transfer.Image.SetSource(IsolatedStorageFile.GetUserStoreForApplication().OpenFile(transfer.Item.LocalFilename, FileMode.Open)));
+                    Deployment.Current.Dispatcher.BeginInvoke(() =>
+                                                                  {
+                                                                      using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
+                                                                      {
+                                                                          lock (ImageCache._lock)
+                                                                          {
+                                                                              using (IsolatedStorageFileStream fs =isf.OpenFile(transfer.Item.LocalFilename,FileMode.Open))
+                                                                              {
+                                                                                  transfer.Image.SetSource(fs);
+                                                                              }
+                                                                          }
+                                                                      }
+                                                                  });
                     return;
                 }
-                //Hat das Bild eine neue ID?
-                if (response.Headers["ETag"] != null)
+                lock (ImageCache._lock)
                 {
-                    transfer.Item.ImageID = response.Headers["ETag"];
-                }
-                else
-                {
-                    transfer.Item.ImageID = null;
-                }
-                //Gibt es ein Ablaufdatum?
-                if (response.Headers["Expires"] != null)
-                {
-                    transfer.Item.Expiration = DateTime.Parse(response.Headers["Expires"]);
-                }
-                else
-                {
-                    transfer.Item.Expiration = DateTime.Now.AddDays(EXPIRATIONDAYS);
-                }
-
-                var responseStream = response.GetResponseStream();
-
-                //Schreiben der Bilddatei
-                using (var bw = new BinaryWriter(IsolatedStorageFile.GetUserStoreForApplication().CreateFile(transfer.Item.LocalFilename)))
-                {
-                    byte[] b = new byte[4096];
-                    int read = 0;
-                    while ((read = responseStream.Read(b, 0, b.Length)) > 0)
+                    string newKey = transfer.WebRequest.RequestUri.ToString();
+                    if (ImageCache.imageCache.ContainsKey(newKey))
                     {
-                        bw.Write(b, 0, read);
+                        //Setzen des Bildes
+                        Deployment.Current.Dispatcher.BeginInvoke(
+                            () =>
+                            {
+                                using (IsolatedStorageFile ifs = IsolatedStorageFile.GetUserStoreForApplication())
+                                {
+                                    using (IsolatedStorageFileStream fs = ifs.OpenFile(transfer.Item.LocalFilename, FileMode.Open))
+                                    {
+                                        transfer.Image.SetSource(fs);
+                                    }
+                                }
+                            });
+                        return;
+                    }
+                    //Hat das Bild eine neue ID?
+                    if (response.Headers["ETag"] != null)
+                    {
+                        transfer.Item.ImageID = response.Headers["ETag"];
+                    }
+                    else
+                    {
+                        transfer.Item.ImageID = null;
+                    }
+                    //Gibt es ein Ablaufdatum?
+                    if (response.Headers["Expires"] != null)
+                    {
+                        transfer.Item.Expiration = DateTime.Parse(response.Headers["Expires"]);
+                    }
+                    else
+                    {
+                        transfer.Item.Expiration = DateTime.Now.AddDays(EXPIRATIONDAYS);
+                    }
+
+                    var responseStream = response.GetResponseStream();
+
+                    //Schreiben der Bilddatei
+                    using ( var bw = new BinaryWriter( IsolatedStorageFile.GetUserStoreForApplication().CreateFile(transfer.Item.LocalFilename)) )
+                    {
+                        byte[] b = new byte[4096];
+                        int read = 0;
+                        while ((read = responseStream.Read(b, 0, b.Length)) > 0)
+                        {
+                            bw.Write(b, 0, read);
+                        }
+                        bw.Flush();
+                        bw.Close();
+                    }
+                    //Setzen des Bildes
+                    Deployment.Current.Dispatcher.BeginInvoke(
+                        () =>
+                            {
+                                using (IsolatedStorageFile ifs = IsolatedStorageFile.GetUserStoreForApplication())
+                                {
+                                    using (IsolatedStorageFileStream fs = ifs.OpenFile( transfer.Item.LocalFilename,FileMode.Open))
+                                    {
+                                        transfer.Image.SetSource(fs);
+                                    }
+                                }
+                            });
+                    //Hinzufügen der Bildinformationen
+                    if (!ImageCache.imageCache.ContainsKey(newKey))
+                    {
+                        ImageCache.imageCache.Add(newKey, transfer.Item);
+                        //Speichern der Bildinformationen
+                        ImageCache.SaveCachedImageInfo();
                     }
-                    bw.Flush();
-                    bw.Close();
                 }
-                //Setzen des Bildes
-                Deployment.Current.Dispatcher.BeginInvoke(() => transfer.Image.SetSource(IsolatedStorageFile.GetUserStoreForApplication().OpenFile(transfer.Item.LocalFilename, FileMode.Open)));
-                //Hinzufügen der Bildinformationen
-                ImageCache.imageCache.Add(transfer.WebRequest.RequestUri.ToString(), transfer.Item);
-                //Speichern der Bildinformationen
-                ImageCache.SaveCachedImageInfo();
             }
-            catch
+            catch (WebException webException)
+            {
+            }
+            catch (Exception ex)
             {
                 //Nichts machen, da Bild nicht heruntergeladen werden konnte
+                Debug.WriteLine(ex.ToString());
             }
+
         }
 
         //Erstellt einen eindeutigen Namen für das zu ladende Bild
@@ -118,7 +169,7 @@ namespace WPImageCaching
             byte[] textToHash = Encoding.UTF8.GetBytes(url);
             SHA1Managed sa = new SHA1Managed();
             byte[] hash = sa.ComputeHash(textToHash);
-            return BitConverter.ToString(hash)+extension;
+            return BitConverter.ToString(hash) + extension;
         }
     }
     //Hilfsklasse für den asynchronen Aufruf

main/Libs/WPImageCaching/SerializationHelper.cs

@@ -0,0 +1,21 @@
+using Newtonsoft.Json;
+
+namespace WPImageCaching
+{
+    public static class SerializationHelper
+    {
+        public static T Deserialize<T>(string serialized)
+        {
+            if (string.IsNullOrEmpty(serialized))
+                return default(T);
+
+            return JsonConvert.DeserializeObject<T>(serialized);
+        }
+
+        public static string Serialize<T>(T obj)
+        {
+            return JsonConvert.SerializeObject(obj);
+        }
+
+    }
+}

main/Libs/WPImageCaching/WPImageCaching.csproj

@@ -40,8 +40,29 @@
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'GPS_EMULATOR|AnyCPU'">
+    <DebugSymbols>true</DebugSymbols>
+    <OutputPath>bin\GPS_EMULATOR\</OutputPath>
+    <DefineConstants>DEBUG;TRACE;SILVERLIGHT;WINDOWS_PHONE</DefineConstants>
+    <NoStdLib>true</NoStdLib>
+    <DebugType>full</DebugType>
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <CodeAnalysisLogFile>Bin\Debug\WPImageCaching.dll.CodeAnalysisLog.xml</CodeAnalysisLogFile>
+    <CodeAnalysisUseTypeNameInSuppression>true</CodeAnalysisUseTypeNameInSuppression>
+    <CodeAnalysisModuleSuppressionsFile>GlobalSuppressions.cs</CodeAnalysisModuleSuppressionsFile>
+    <ErrorReport>prompt</ErrorReport>
+    <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
+    <CodeAnalysisRuleSetDirectories>;C:\Program Files (x86)\Microsoft Visual Studio 10.0\Team Tools\Static Analysis Tools\\Rule Sets</CodeAnalysisRuleSetDirectories>
+    <CodeAnalysisRuleDirectories>;C:\Program Files (x86)\Microsoft Visual Studio 10.0\Team Tools\Static Analysis Tools\FxCop\\Rules</CodeAnalysisRuleDirectories>
+    <CodeAnalysisIgnoreBuiltInRules>true</CodeAnalysisIgnoreBuiltInRules>
+    <CodeAnalysisFailOnMissingRules>false</CodeAnalysisFailOnMissingRules>
+  </PropertyGroup>
   <ItemGroup>
+    <Reference Include="Microsoft.Phone" />
     <Reference Include="mscorlib" />
+    <Reference Include="Newtonsoft.Json.WindowsPhone">
+      <HintPath>..\Json40r1\WindowsPhone\Newtonsoft.Json.WindowsPhone.dll</HintPath>
+    </Reference>
     <Reference Include="System.Runtime.Serialization" />
     <Reference Include="System.Windows" />
     <Reference Include="system" />
@@ -55,6 +76,7 @@
     <Compile Include="ImageCacheItem.cs" />
     <Compile Include="ImageDownloadHelper.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="SerializationHelper.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Microsoft\Silverlight for Phone\$(TargetFrameworkVersion)\Microsoft.Silverlight.$(TargetFrameworkProfile).Overrides.targets" />
   <Import Project="$(MSBuildExtensionsPath)\Microsoft\Silverlight for Phone\$(TargetFrameworkVersion)\Microsoft.Silverlight.CSharp.targets" />

main/MyFriendsAround.WP7/App.xaml.cs

@@ -52,13 +52,14 @@ namespace MyFriendsAround.WP7
 
             //register ViewModelLocator
             Container.Instance.RegisterInstance(typeof(ViewModelLocator), "ViewModelLocator");
-            Container.Instance.RegisterInstance<ILocationService>( new LocationService(), "LocationService");
+            Container.Instance.RegisterInstance<ILocationService>(new LocationService(), "LocationService");
         }
 
 
         public static ILocationService LocationService
         {
-            get {
+            get
+            {
                 return Container.Instance.Resolve<ILocationService>("LocationService");
             }
         }
@@ -137,12 +138,7 @@ namespace MyFriendsAround.WP7
         void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
         {
             //LittleWatson.ReportException(e.Exception, string.Empty);
-            DispatcherHelper.CheckBeginInvokeOnUI(() =>
-                {
-                    var exception = new ExceptionPrompt();
-                    exception.Show(e.Exception);
-                }
-            );
+            ShowException(e.Exception);
 
             if (System.Diagnostics.Debugger.IsAttached)
             {
@@ -155,13 +151,7 @@ namespace MyFriendsAround.WP7
         private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
         {
             //LittleWatson.ReportException(e.ExceptionObject, string.Empty);
-
-            DispatcherHelper.CheckBeginInvokeOnUI(() =>
-                {
-                    var exception = new ExceptionPrompt();
-                    exception.Show(e.ExceptionObject);
-                }
-            );
+            ShowException(e.ExceptionObject);
 
             if (System.Diagnostics.Debugger.IsAttached)
             {
@@ -172,6 +162,16 @@ namespace MyFriendsAround.WP7
             e.Handled = true;
         }
 
+        private void ShowException(Exception ex)
+        {
+            DispatcherHelper.CheckBeginInvokeOnUI(() =>
+            {
+                Container.Instance.Resolve<ViewModelLocator>("ViewModelLocator").Main.IsBusy = false;
+                var exception = new ExceptionPrompt();
+                exception.Show(ex);
+            }
+            );
+        }
 
         #region Phone application initialization
 

main/MyFriendsAround.WP7/Service/ServiceAgent.cs

@@ -16,9 +16,14 @@ namespace MyFriendsAround.WP7.Service
 
         static ServiceAgent()
         {
-            baseUrl = "http://myfriendsaround.cloudapp.net/myfriends";//live azure
-            //baseUrl = "http://127.0.0.1:80/myfriends";//running in local azure emulator
+#if GPS_EMULATOR
+            baseUrl = "http://127.0.0.1:80/myfriends";//running in local azure emulator
             //baseUrl = "http://localhost.:55672/myfriends";//for local asp.net mvc use 
+#else
+            baseUrl = "http://myfriendsaround.cloudapp.net/myfriends";//live azure
+            //baseUrl = "http://localhost:80/myfriends";
+#endif      
+            
         }
 
         #region GetFriends

main/MyFriendsAround.WP7/ViewModel/MainViewModel.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.ComponentModel;
 using System.Device.Location;
 using System.IO;
 using System.Net;
@@ -57,8 +58,18 @@ namespace MyFriendsAround.WP7.ViewModel
         public MainViewModel()
         {
             GpsLocation = Location.Unknown;
+            _SelectedFriend = null;
+
             //
             MainLoadCommand = new RelayCommand(() => MainLoad());
+            BackKeyPressCommand = new RelayCommand<CancelEventArgs>((args) =>
+                                                                        {
+                                                                            if (IsSelectFriend)
+                                                                            {
+                                                                                IsSelectFriend = !IsSelectFriend;
+                                                                                args.Cancel = true;
+                                                                            }
+                                                                        });
             PublishLocationCommand = new RelayCommand(() => PublishLocationAction());
             NavigateToSettingsCommand = new RelayCommand(() => NavigateToSettings());
             RefreshFriendsCommand = new RelayCommand(() => RefreshFriends());
@@ -194,12 +205,8 @@ namespace MyFriendsAround.WP7.ViewModel
         /// </summary>
         public const string SelectedFriendPropertyName = "SelectedFriend";
 
-        private PushPinModel _SelectedFriend = new PushPinModel()
-                                                   {
-                                                       Location = GeoCoordinate.Unknown,
-                                                       PinUserName = "Guest",
-                                                       PinImageUrl = string.Empty
-                                                   };
+        private PushPinModel _SelectedFriend;
+
 
         /// <summary>
         /// Gets the SelectedFriend property.
@@ -562,12 +569,6 @@ namespace MyFriendsAround.WP7.ViewModel
 
             set
             {
-                if (_isBusy == value)
-                {
-                    return;
-                }
-
-                var oldValue = _isBusy;
                 _isBusy = value;
 
                 // Update bindings, no broadcast
@@ -616,6 +617,7 @@ namespace MyFriendsAround.WP7.ViewModel
         #region Commands
 
         public ICommand MainLoadCommand { get; set; }
+        public ICommand BackKeyPressCommand { get; set; }
         public ICommand PublishLocationCommand { get; set; }
         public ICommand NavigateToSettingsCommand { get; set; }
         public ICommand ShowMyLocationCommand { get; set; }
@@ -876,7 +878,7 @@ namespace MyFriendsAround.WP7.ViewModel
                 result.Add(new PushPinModel()
                                {
                                    PinSource = "/ApplicationIcon.png",
-                                   Location = new GeoCoordinate(f.Latitude, f.Longitude),
+                                   Location = new GeoCoordinate(f.Latitude, f.Longitude, 0),
                                    PinUserName = f.FriendName,
                                    PinImageUrl =
                                        string.Format(
@@ -923,21 +925,21 @@ namespace MyFriendsAround.WP7.ViewModel
             {
                 List<Friend> list = args.Friends;
                 DispatcherHelper.CheckBeginInvokeOnUI(() =>
-                {
-                    PopulatePushPins(list);
-                    IsBusy = false;
-                }
-                    );
+                    {
+                        IsBusy = false;
+                        PopulatePushPins(list);
+                    }
+                );
             }
             else
             {
                 DispatcherHelper.CheckBeginInvokeOnUI(() =>
-                {
-                    IsBusy = false;
-                    var exception = new ExceptionPrompt();
-                    exception.Show(args.Error);
-                }
-                    );
+                    {
+                        IsBusy = false;
+                        var exception = new ExceptionPrompt();
+                        exception.Show(args.Error);
+                    }
+                );
             }
         }
 
@@ -958,6 +960,7 @@ namespace MyFriendsAround.WP7.ViewModel
                 {
                     DispatcherHelper.CheckBeginInvokeOnUI(() =>
                     {
+                        IsBusy = false;
                         var message = new DialogMessage(
                             "Communication error!", DialogMessageCallback)
                         {
@@ -1004,6 +1007,7 @@ namespace MyFriendsAround.WP7.ViewModel
                 {
                     DispatcherHelper.CheckBeginInvokeOnUI(() =>
                     {
+                        IsBusy = false;
                         var message = new DialogMessage(
                             "Communication error!", DialogMessageCallback)
                         {

main/MyFriendsAround.WP7/Views/MainPage.xaml

@@ -74,7 +74,11 @@
         <i:EventTrigger EventName="Loaded">
             <cmd:EventToCommand Command="{Binding MainLoadCommand}" />
         </i:EventTrigger>
+        <i:EventTrigger EventName="BackKeyPress">
+            <cmd:EventToCommand Command="{Binding BackKeyPressCommand}" PassEventArgsToCommand="True" />
+        </i:EventTrigger>
     </i:Interaction.Triggers>
+    
 
     <Grid x:Name="LayoutRoot"
           Background="Transparent">
@@ -252,6 +256,31 @@
 
         </Grid>
 
+
+        <Preview:BindableApplicationBar x:Name="AppBar"
+                                        BarOpacity="0.8">
+            <Preview:BindableApplicationBarIconButton Command="{Binding ShowMyLocationCommand}"
+                                                      IconUri="/icons/appbar.location.png"
+                                                      Text="{Binding AppBarTextMyLocation}" />
+            <Preview:BindableApplicationBarIconButton Command="{Binding RefreshFriendsCommand}"
+                                                      IconUri="/icons/appbar.sync.rest.png"
+                                                      Text="{Binding AppBarTextRefresh}"
+                                                      IsEnabled="{Binding Path=IsBusy, Converter={StaticResource InvertValueConverter1}}" />
+            <Preview:BindableApplicationBarIconButton Command="{Binding PublishLocationCommand}"
+                                                      IconUri="/icons/appbar.publish.png"
+                                                      Text="{Binding AppBarTextPublish}"
+                                                      IsEnabled="{Binding Path=IsBusy, Converter={StaticResource InvertValueConverter1}}" />
+            <Preview:BindableApplicationBarIconButton Command="{Binding NavigateToSettingsCommand}"
+                                                      IconUri="/icons/appbar.feature.settings.rest.png"
+                                                      Text="{Binding AppBarTextSettings}" />
+
+            <Preview:BindableApplicationBar.MenuItems>
+                <Preview:BindableApplicationBarMenuItem  Text="{Binding AppBarTextAbout}"
+                                                         Command="{Binding ShowAboutCommand}" />
+            </Preview:BindableApplicationBar.MenuItems>
+        </Preview:BindableApplicationBar>
+        
+        
         <Grid Background="Transparent"
               VerticalAlignment="Stretch"
               Grid.RowSpan="2"
@@ -320,28 +349,7 @@
             </StackPanel>
         </Grid>
 
-        <Preview:BindableApplicationBar x:Name="AppBar"
-                                        BarOpacity="0.8">
-            <Preview:BindableApplicationBarIconButton Command="{Binding ShowMyLocationCommand}"
-                                                      IconUri="/icons/appbar.location.png"
-                                                      Text="{Binding AppBarTextMyLocation}" />
-            <Preview:BindableApplicationBarIconButton Command="{Binding RefreshFriendsCommand}"
-                                                      IconUri="/icons/appbar.sync.rest.png"
-                                                      Text="{Binding AppBarTextRefresh}"
-                                                      IsEnabled="{Binding Path=IsBusy, Converter={StaticResource InvertValueConverter1}}" />
-            <Preview:BindableApplicationBarIconButton Command="{Binding PublishLocationCommand}"
-                                                      IconUri="/icons/appbar.publish.png"
-                                                      Text="{Binding AppBarTextPublish}"
-                                                      IsEnabled="{Binding Path=IsBusy, Converter={StaticResource InvertValueConverter1}}" />
-            <Preview:BindableApplicationBarIconButton Command="{Binding NavigateToSettingsCommand}"
-                                                      IconUri="/icons/appbar.feature.settings.rest.png"
-                                                      Text="{Binding AppBarTextSettings}" />
-
-            <Preview:BindableApplicationBar.MenuItems>
-                <Preview:BindableApplicationBarMenuItem  Text="{Binding AppBarTextAbout}"
-                                                         Command="{Binding ShowAboutCommand}" />
-            </Preview:BindableApplicationBar.MenuItems>
-        </Preview:BindableApplicationBar>
+        
     </Grid>
 
 </phone:PhoneApplicationPage>

main/MyFriendsAround.sln

@@ -316,8 +316,8 @@ Global
 		{17158FD9-80FD-49C1-9E3F-C5633602A4D9}.Debug|x86.ActiveCfg = Debug|Any CPU
 		{17158FD9-80FD-49C1-9E3F-C5633602A4D9}.GPS_EMULATOR|Any CPU.ActiveCfg = Release|Any CPU
 		{17158FD9-80FD-49C1-9E3F-C5633602A4D9}.GPS_EMULATOR|Any CPU.Build.0 = Release|Any CPU
-		{17158FD9-80FD-49C1-9E3F-C5633602A4D9}.GPS_EMULATOR|Mixed Platforms.ActiveCfg = Release|Any CPU
-		{17158FD9-80FD-49C1-9E3F-C5633602A4D9}.GPS_EMULATOR|Mixed Platforms.Build.0 = Release|Any CPU
+		{17158FD9-80FD-49C1-9E3F-C5633602A4D9}.GPS_EMULATOR|Mixed Platforms.ActiveCfg = GPS_EMULATOR|Any CPU
+		{17158FD9-80FD-49C1-9E3F-C5633602A4D9}.GPS_EMULATOR|Mixed Platforms.Build.0 = GPS_EMULATOR|Any CPU
 		{17158FD9-80FD-49C1-9E3F-C5633602A4D9}.GPS_EMULATOR|x86.ActiveCfg = Release|Any CPU
 		{17158FD9-80FD-49C1-9E3F-C5633602A4D9}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{17158FD9-80FD-49C1-9E3F-C5633602A4D9}.Release|Any CPU.Build.0 = Release|Any CPU