[multitasking] update android min/target versions (#107)

* update android min/target versions

fixes #106

* update readme & screenshots

MultiThreading/AndroidMultiThreading/AndroidMultiThreading.csproj

@@ -16,8 +16,8 @@
     <AndroidResgenFile>Resources\Resource.designer.cs</AndroidResgenFile>
     <AssemblyName>AndroidMultiThreading</AssemblyName>
     <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
-    <TargetFrameworkVersion>v8.1</TargetFrameworkVersion>
-    <AndroidUseLatestPlatformSdk>false</AndroidUseLatestPlatformSdk>
+    <TargetFrameworkVersion>v9.0</TargetFrameworkVersion>
+    <AndroidUseLatestPlatformSdk>true</AndroidUseLatestPlatformSdk>
     <NuGetPackageImportStamp>
     </NuGetPackageImportStamp>
   </PropertyGroup>
@@ -77,7 +77,7 @@
     <AndroidResource Include="Resources\values\Strings.xml" />
     <AndroidResource Include="Resources\drawable\Icon.png" />
   </ItemGroup>
-  <Import Project="$(MSBuildExtensionsPath)\Novell\Novell.MonoDroid.CSharp.targets" />
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
   <ItemGroup>
     <AndroidResource Include="Resources\values\styles.xml" />
   </ItemGroup>

MultiThreading/AndroidMultiThreading/Properties/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="2" android:versionName="2.0" package="AndroidMultiThreading.AndroidMultiThreading" android:installLocation="auto">
-	<uses-sdk android:minSdkVersion="27" android:targetSdkVersion="23" />
+	<uses-sdk android:minSdkVersion="23" />
 	<application android:label="AndroidMultiThreading" android:theme="@style/MainTheme"></application>
 </manifest>

MultiThreading/README.md

@@ -3,11 +3,9 @@ MultiTasking
 
 Simple example of using a background thread to perform a long running task.
 
-Includes two examples: updating the UI thread on completion 	and starting tasks that run without a notification at the end.
-
+Includes two examples: updating the UI thread on completion and starting tasks that run without a notification at the end.
 
 Authors
 -------
 
-Bryan Costanich, 
-Craig Dunn
+Bryan Costanich, Craig Dunn