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Archive map circle custom renderer.
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‎Docs/Map Circle/Sample/Droid/Assets/AboutAssets.txt

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

‎Docs/Map Circle/Sample/Droid/CustomMapRenderer.cs

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using Android.Content;
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using Android.Gms.Maps.Model;
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using MapOverlay;
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using MapOverlay.Droid;
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using Xamarin.Forms;
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using Xamarin.Forms.Maps.Android;
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[assembly: ExportRenderer(typeof(CustomMap), typeof(CustomMapRenderer))]
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namespace MapOverlay.Droid
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{
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public class CustomMapRenderer : MapRenderer
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{
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CustomCircle circle;
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public CustomMapRenderer(Context context) : base(context)
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{
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}
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protected override void OnElementChanged(Xamarin.Forms.Platform.Android.ElementChangedEventArgs<Xamarin.Forms.Maps.Map> e)
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{
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base.OnElementChanged(e);
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if (e.OldElement != null)
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{
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// Unsubscribe
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}
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if (e.NewElement != null)
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{
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var formsMap = (CustomMap)e.NewElement;
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circle = formsMap.Circle;
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}
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}
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protected override void OnMapReady(Android.Gms.Maps.GoogleMap map)
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{
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base.OnMapReady(map);
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var circleOptions = new CircleOptions();
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circleOptions.InvokeCenter(new LatLng(circle.Position.Latitude, circle.Position.Longitude));
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circleOptions.InvokeRadius(circle.Radius);
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circleOptions.InvokeFillColor(0X66FF0000);
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circleOptions.InvokeStrokeColor(0X66FF0000);
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circleOptions.InvokeStrokeWidth(0);
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NativeMap.AddCircle(circleOptions);
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}
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}
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}

‎Docs/Map Circle/Sample/Droid/MainActivity.cs

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using System;
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using Android.App;
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using Android.Content.PM;
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using Android.OS;
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namespace MapOverlay.Droid
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{
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[Activity (Label = "MapOverlay.Droid", Icon = "@drawable/icon", Theme = "@style/MainTheme", MainLauncher = true, ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
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public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
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{
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protected override void OnCreate (Bundle bundle)
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{
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base.OnCreate (bundle);
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global::Xamarin.Forms.Forms.Init (this, bundle);
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Xamarin.FormsMaps.Init (this, bundle);
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var width = Resources.DisplayMetrics.WidthPixels;
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var height = Resources.DisplayMetrics.HeightPixels;
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var density = Resources.DisplayMetrics.Density;
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App.ScreenWidth = (width - 0.5f) / density;
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App.ScreenHeight = (height - 0.5f) / density;
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LoadApplication (new App ());
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}
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}
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}

‎Docs/Map Circle/Sample/Droid/MapOverlay.Droid.csproj

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<?xml version="1.0" encoding="utf-8"?>
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<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectTypeGuids>{EFBA0AD7-5A72-4C68-AF49-83D382785DCF};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
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<ProjectGuid>{DA7FB1AE-A0D7-40FB-B5A5-852E3A7B93F1}</ProjectGuid>
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<OutputType>Library</OutputType>
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<RootNamespace>MapOverlay.Droid</RootNamespace>
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<MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
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<MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
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<AndroidResgenClass>Resource</AndroidResgenClass>
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<AndroidResgenFile>Resources\Resource.designer.cs</AndroidResgenFile>
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<AndroidApplication>True</AndroidApplication>
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<AssemblyName>MapOverlay.Droid</AssemblyName>
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<AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
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<TargetFrameworkVersion>v9.0</TargetFrameworkVersion>
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<JavaMaximumHeapSize>1G</JavaMaximumHeapSize>
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<AndroidHttpClientHandlerType>Xamarin.Android.Net.AndroidClientHandler</AndroidHttpClientHandlerType>
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<NuGetPackageImportStamp />
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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<DebugSymbols>true</DebugSymbols>
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<DebugType>portable</DebugType>
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<Optimize>false</Optimize>
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<OutputPath>bin\Debug</OutputPath>
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<DefineConstants>DEBUG;</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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<AndroidLinkMode>None</AndroidLinkMode>
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<ConsolePause>false</ConsolePause>
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<AndroidEnableMultiDex>true</AndroidEnableMultiDex>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
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<DebugType>portable</DebugType>
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<Optimize>true</Optimize>
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<OutputPath>bin\Release</OutputPath>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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<AndroidUseSharedRuntime>false</AndroidUseSharedRuntime>
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<ConsolePause>false</ConsolePause>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Xamarin.Forms" Version="4.5.0.356" />
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<PackageReference Include="Xamarin.Forms.Maps" Version="4.5.0.356" />
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</ItemGroup>
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<ItemGroup>
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<Reference Include="System" />
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<Reference Include="System.Xml" />
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<Reference Include="System.Core" />
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<Reference Include="Mono.Android" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\MapOverlay\MapOverlay.csproj">
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<Project>{61E6D969-58D3-47D8-B653-410B26EE1FE6}</Project>
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<Name>MapOverlay</Name>
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</ProjectReference>
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</ItemGroup>
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<ItemGroup>
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<Compile Include="MainActivity.cs" />
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<Compile Include="Resources\Resource.designer.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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<Compile Include="CustomMapRenderer.cs" />
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</ItemGroup>
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<ItemGroup>
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<None Include="Resources\AboutResources.txt" />
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<None Include="Properties\AndroidManifest.xml" />
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<None Include="Assets\AboutAssets.txt" />
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</ItemGroup>
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<ItemGroup>
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<Folder Include="Resources\layout\" />
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<Folder Include="Resources\values\" />
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</ItemGroup>
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<ItemGroup>
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<AndroidResource Include="Resources\drawable\icon.png" />
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<AndroidResource Include="Resources\drawable-hdpi\icon.png" />
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<AndroidResource Include="Resources\drawable-xhdpi\icon.png" />
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<AndroidResource Include="Resources\drawable-xxhdpi\icon.png" />
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</ItemGroup>
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<ItemGroup>
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<AndroidResource Include="Resources\layout\Tabbar.axml" />
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<AndroidResource Include="Resources\layout\Toolbar.axml" />
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<AndroidResource Include="Resources\values\styles.xml" />
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<AndroidResource Include="Resources\values\colors.xml" />
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</ItemGroup>
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<Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
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</Project>

‎Docs/Map Circle/Sample/Droid/Properties/AndroidManifest.xml

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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.companyname.mapoverlay">
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<uses-sdk android:minSdkVersion="19" />
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<application android:label="MapOverlay">
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<meta-data android:name="com.google.android.geo.API_KEY" android:value="INSERT_MAP_API_KEY_HERE" />
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<!-- Necessary for apps that target Android 9.0 or higher -->
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<uses-library android:name="org.apache.http.legacy" android:required="false" />
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</application>
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<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
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<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
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<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
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<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
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<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
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<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
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<uses-permission android:name="android.permission.INTERNET" />
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</manifest>

‎Docs/Map Circle/Sample/Droid/Properties/AssemblyInfo.cs

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using System.Reflection;
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using System.Runtime.CompilerServices;
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using Android.App;
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// Information about this assembly is defined by the following attributes.
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// Change them to the values specific to your project.
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[assembly: AssemblyTitle ("MapOverlay.Droid")]
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[assembly: AssemblyDescription ("")]
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[assembly: AssemblyConfiguration ("")]
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[assembly: AssemblyCompany ("")]
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[assembly: AssemblyProduct ("")]
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[assembly: AssemblyCopyright ("davidbritch")]
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[assembly: AssemblyTrademark ("")]
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[assembly: AssemblyCulture ("")]
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// The assembly version has the format "{Major}.{Minor}.{Build}.{Revision}".
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// The form "{Major}.{Minor}.*" will automatically update the build and revision,
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// and "{Major}.{Minor}.{Build}.*" will update just the revision.
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[assembly: AssemblyVersion ("1.0.0")]
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// The following attributes are used to specify the signing key for the assembly,
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// if desired. See the Mono documentation for more information about signing.
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//[assembly: AssemblyDelaySign(false)]
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//[assembly: AssemblyKeyFile("")]
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‎Docs/Map Circle/Sample/Droid/Resources/AboutResources.txt

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

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