New sample for Android local notifications (#651)

LocalNotifications/Metadata.xml

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+<?xml version="1.0" encoding="utf-8" ?>
+<SampleMetadata>
+	<ID>51B3A4D9-5D1A-4D9C-8E36-CA09A4D3A050</ID>
+	<IsFullApplication>false</IsFullApplication>
+	<Level>Intermediate</Level>
+	<Tags>Notifications</Tags>
+    <SupportedPlatforms>Android</SupportedPlatforms>
+	<Gallery>false</Gallery>
+	<LicenseRequirement>Indie</LicenseRequirement>
+</SampleMetadata>

LocalNotifications/Notifications.Android/Assets/AboutAssets.txt

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+Any raw assets you want to be deployed with your application can be placed in
+this directory (and child directories) and given a Build Action of "AndroidAsset".
+
+These files will be deployed with you package and will be accessible using Android's
+AssetManager, like this:
+
+public class ReadAsset : Activity
+{
+	protected override void OnCreate (Bundle bundle)
+	{
+		base.OnCreate (bundle);
+
+		InputStream input = Assets.Open ("my_asset.txt");
+	}
+}
+
+Additionally, some Android functions will automatically load asset files:
+
+Typeface tf = Typeface.CreateFromAsset (Context.Assets, "fonts/samplefont.ttf");

LocalNotifications/Notifications.Android/MainActivity.cs

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+using System;
+using Android.App;
+using Android.Content;
+using Android.OS;
+using Android.Widget;
+using Java.Lang;
+using String = System.String;
+using NotificationCompat = Android.Support.V4.App.NotificationCompat;
+using TaskStackBuilder = Android.Support.V4.App.TaskStackBuilder;
+
+namespace Notifications
+{
+    [Activity(Label = "Notifications", MainLauncher = true, Icon = "@drawable/Icon")]
+    public class MainActivity : Activity
+    {
+        // Unique ID for our notification: 
+        private static readonly int ButtonClickNotificationId = 1000;
+
+        // Number of times the button is tapped (starts with first tap):
+        private int count = 1;
+
+        protected override void OnCreate(Bundle bundle)
+        {
+            base.OnCreate(bundle);
+            SetContentView(Resource.Layout.Main);
+
+            // Display the "Hello World, Click Me!" button and register its event handler:
+            Button button = FindViewById<Button>(Resource.Id.MyButton);
+            button.Click += ButtonOnClick;
+        }
+
+        // Handler for button click events.
+        private void ButtonOnClick(object sender, EventArgs eventArgs)
+        {
+            // Pass the current button press count value to the next activity:
+            Bundle valuesForActivity = new Bundle();
+            valuesForActivity.PutInt("count", count);
+
+            // When the user clicks the notification, SecondActivity will start up.
+            Intent resultIntent = new Intent(this, typeof(SecondActivity));
+
+            // Pass some values to SecondActivity:
+            resultIntent.PutExtras(valuesForActivity); 
+
+            // Construct a back stack for cross-task navigation:
+            TaskStackBuilder stackBuilder = TaskStackBuilder.Create(this);
+            stackBuilder.AddParentStack(Class.FromType(typeof(SecondActivity)));
+            stackBuilder.AddNextIntent(resultIntent);
+
+            // Create the PendingIntent with the back stack:            
+            PendingIntent resultPendingIntent = stackBuilder.GetPendingIntent(0, (int)PendingIntentFlags.UpdateCurrent);
+
+            // Build the notification:
+            NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
+                .SetAutoCancel(true)                    // Dismiss the notification from the notification area when the user clicks on it
+                .SetContentIntent(resultPendingIntent)  // Start up this activity when the user clicks the intent.
+                .SetContentTitle("Button Clicked")      // Set the title
+                .SetNumber(count)                       // Display the count in the Content Info
+                .SetSmallIcon(Resource.Drawable.ic_stat_button_click) // This is the icon to display
+                .SetContentText(String.Format("The button has been clicked {0} times.", count)); // the message to display.
+
+            // Finally, publish the notification:
+            NotificationManager notificationManager = (NotificationManager)GetSystemService(Context.NotificationService);
+            notificationManager.Notify(ButtonClickNotificationId, builder.Build());
+
+            // Increment the button press count:
+            count++;
+        }
+    }
+}

LocalNotifications/Notifications.Android/Notifications.Android.csproj

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{EC6A0616-67F3-46DC-817B-01B9866D283C}</ProjectGuid>
+    <ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <OutputType>Library</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <RootNamespace>Notifications</RootNamespace>
+    <AssemblyName>Notifications</AssemblyName>
+    <FileAlignment>512</FileAlignment>
+    <AndroidApplication>true</AndroidApplication>
+    <AndroidResgenFile>Resources\Resource.Designer.cs</AndroidResgenFile>
+    <GenerateSerializationAssemblies>Off</GenerateSerializationAssemblies>
+    <TargetFrameworkVersion>v4.4</TargetFrameworkVersion>
+    <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
+    <AndroidUseLatestPlatformSdk>False</AndroidUseLatestPlatformSdk>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>True</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>False</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidLinkMode>None</AndroidLinkMode>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>True</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <AndroidUseSharedRuntime>False</AndroidUseSharedRuntime>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="Mono.Android" />
+    <Reference Include="mscorlib" />
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Xml" />
+    <Reference Include="Xamarin.Android.Support.v4">
+      <HintPath>..\packages\Xamarin.Android.Support.v4.22.2.0.0\lib\MonoAndroid403\Xamarin.Android.Support.v4.dll</HintPath>
+    </Reference>
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="MainActivity.cs" />
+    <Compile Include="Resources\Resource.Designer.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="SecondActivity.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+    <None Include="Resources\AboutResources.txt" />
+    <None Include="Assets\AboutAssets.txt" />
+    <AndroidResource Include="Resources\Layout\Second.axml">
+      <SubType>AndroidResource</SubType>
+    </AndroidResource>
+    <AndroidResource Include="Resources\drawable-xxhdpi\Icon.png" />
+    <AndroidResource Include="Resources\drawable-hdpi\Icon.png" />
+    <AndroidResource Include="Resources\drawable-mdpi\Icon.png" />
+    <AndroidResource Include="Resources\drawable-xhdpi\Icon.png" />
+    <AndroidResource Include="Resources\Drawable\Icon.png" />
+    <None Include="Properties\AndroidManifest.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\Layout\Main.axml" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\Values\Strings.xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\drawable-hdpi\ic_stat_button_click.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\drawable-mdpi\ic_stat_button_click.png" />
+  </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\drawable-xhdpi\ic_stat_button_click.png" />
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
+  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+     Other similar extension points exist, see Microsoft.Common.targets.
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+  -->
+  <ItemGroup />
+</Project>

LocalNotifications/Notifications.Android/Properties/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="Notifications.Android">
+	<uses-sdk />
+	<application android:label="Notifications.Android"></application>
+</manifest>

LocalNotifications/Notifications.Android/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using Android.App;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("Notifications")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Notifications")]
+[assembly: AssemblyCopyright("Copyright ©  2013")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+[assembly: ComVisible(false)]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
+
+[assembly: Application(Icon="@drawable/Icon")]

LocalNotifications/Notifications.Android/Resources/AboutResources.txt

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+Images, layout descriptions, binary blobs and string dictionaries can be included 
+in your application as resource files.  Various Android APIs are designed to 
+operate on the resource IDs instead of dealing with images, strings or binary blobs 
+directly.
+
+For example, a sample Android app that contains a user interface layout (main.xml),
+an internationalization string table (strings.xml) and some icons (drawable-XXX/icon.png) 
+would keep its resources in the "Resources" directory of the application:
+
+Resources/
+    drawable-hdpi/
+        icon.png
+
+    drawable-ldpi/
+        icon.png
+
+    drawable-mdpi/
+        icon.png
+
+    layout/
+        main.xml
+
+    values/
+        strings.xml
+
+In order to get the build system to recognize Android resources, set the build action to
+"AndroidResource".  The native Android APIs do not operate directly with filenames, but 
+instead operate on resource IDs.  When you compile an Android application that uses resources, 
+the build system will package the resources for distribution and generate a class called
+"Resource" that contains the tokens for each one of the resources included. For example, 
+for the above Resources layout, this is what the Resource class would expose:
+
+public class Resource {
+    public class drawable {
+        public const int icon = 0x123;
+    }
+
+    public class layout {
+        public const int main = 0x456;
+    }
+
+    public class strings {
+        public const int first_string = 0xabc;
+        public const int second_string = 0xbcd;
+    }
+}
+
+You would then use R.drawable.icon to reference the drawable/icon.png file, or Resource.layout.main 
+to reference the layout/main.xml file, or Resource.strings.first_string to reference the first 
+string in the dictionary file values/strings.xml.

LocalNotifications/Notifications.Android/Resources/Layout/Main.axml

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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    >
+<Button  
+    android:id="@+id/MyButton"
+    android:layout_width="fill_parent" 
+    android:layout_height="wrap_content" 
+    android:text="@string/Hello"
+    />
+</LinearLayout>

LocalNotifications/Notifications.Android/Resources/Layout/Second.axml

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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:minWidth="25px"
+    android:minHeight="25px">
+    <TextView
+        android:text=""
+        android:textAppearance="?android:attr/textAppearanceLarge"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:id="@+id/textView1" />
+</LinearLayout>

LocalNotifications/Notifications.Android/Resources/Layout/layout1.axml

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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent"
+    android:minWidth="25px"
+    android:minHeight="25px">
+    <TextView
+        android:text="Button clicked!"
+        android:textAppearance="?android:attr/textAppearanceLarge"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:id="@+id/textView1" />
+</LinearLayout>

LocalNotifications/Notifications.Android/Resources/Values/Strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="Hello">Hello World, Click Me!</string>
+    <string name="ApplicationName">Notifications</string>
+</resources>

LocalNotifications/Notifications.Android/SecondActivity.cs

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+using System;
+using Android.App;
+using Android.OS;
+using Android.Widget;
+
+namespace Notifications
+{
+    [Activity(Label = "Second Activity")]
+    public class SecondActivity : Activity
+    {
+        protected override void OnCreate(Bundle bundle)
+        {
+            base.OnCreate(bundle);
+
+            // Get the count value passed to us from MainActivity:
+            int count = Intent.Extras.GetInt("count", -1);
+
+            // No count was passed? Then just return.
+            if (count <= 0)
+            {
+                return;
+            }
+
+            // Display the count sent from the first activity:
+            SetContentView(Resource.Layout.Second);
+            TextView txtView = FindViewById<TextView>(Resource.Id.textView1);
+            txtView.Text = String.Format("You clicked the button {0} times in the previous activity.", count);
+        }
+    }
+}

LocalNotifications/Notifications.Android/packages.config

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+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Xamarin.Android.Support.v4" version="22.2.0.0" targetFramework="MonoAndroid44" />
+</packages>

LocalNotifications/Notifications.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 2012
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Notifications.Android", "Notifications.Android\Notifications.Android.csproj", "{EC6A0616-67F3-46DC-817B-01B9866D283C}"
+EndProject
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Ad-Hoc|Any CPU = Ad-Hoc|Any CPU
+		Ad-Hoc|Mixed Platforms = Ad-Hoc|Mixed Platforms
+		AppStore|Any CPU = AppStore|Any CPU
+		AppStore|Mixed Platforms = AppStore|Mixed Platforms
+		Debug|Any CPU = Debug|Any CPU
+		Debug|Mixed Platforms = Debug|Mixed Platforms
+		Release|Any CPU = Release|Any CPU
+		Release|Mixed Platforms = Release|Mixed Platforms
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Ad-Hoc|Any CPU.ActiveCfg = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Ad-Hoc|Any CPU.Build.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Ad-Hoc|Any CPU.Deploy.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Ad-Hoc|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Ad-Hoc|Mixed Platforms.Build.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Ad-Hoc|Mixed Platforms.Deploy.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.AppStore|Any CPU.ActiveCfg = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.AppStore|Any CPU.Build.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.AppStore|Any CPU.Deploy.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.AppStore|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.AppStore|Mixed Platforms.Build.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.AppStore|Mixed Platforms.Deploy.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Debug|Mixed Platforms.Deploy.0 = Debug|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Release|Any CPU.Build.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Release|Any CPU.Deploy.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Release|Mixed Platforms.Build.0 = Release|Any CPU
+		{EC6A0616-67F3-46DC-817B-01B9866D283C}.Release|Mixed Platforms.Deploy.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(MonoDevelopProperties) = preSolution
+		StartupItem = Notifications.Android\Notifications.Android.csproj
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

LocalNotifications/README.md

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+Android Local Notifications Sample
+==================================
+
+This sample app accompanies the article, 
+[Walkthrough - Using Local Notifications in Xamarin.Android](http://developer.xamarin.com/guides/cross-platform/application_fundamentals/notifications/android/local_notifications_in_android_walkthrough/).
+
+![](Screenshots/screenshots.png)
+
+When you tap the button displayed in the MainActivity screen, a 
+notification is created. When you tap the notification, it 
+takes you to a SecondActivity screen. 
+