Android setup Script (#1086)

* Add Android setup script

Installs everything you need for development :)

* Update README.md

* Update README.md

Author: jamesmontemagno

README.md

@@ -60,6 +60,8 @@ A minimum version of Visual Studio 2019 16.3 or Visual Studio for Mac 2019 8.3 a
 * Android 10.0, 9.0, 8.1, 8.0, 7.1, 7.0, & 6.0 SDK Installed
 * UWP 10.0.16299 SDK Installed
 
+Your can run the included `android-setup.ps1` script in **Administrator Mode** and it will automatically setup your Android environment.
+
 ## FAQ
 
 Here are some frequently asked questions about Xamarin.Essentials, but be sure to read our full [FAQ on our Wiki](https://github.com/xamarin/Essentials/wiki#feature-faq).

android-setup.ps1

@@ -0,0 +1,53 @@
+$androidSdkHome = $ENV:ANDROID_HOME
+
+if ([string]::IsNullOrWhiteSpace($androidSdkHome))
+{
+    if ($ENV:OS -eq "Windows_NT")
+    {
+        $androidSdkHome = "C:\Program Files (x86)\Android\android-sdk\"
+    }
+    else
+    {
+        $androidSdkHome = Resolve-Path "~/Library/Developer/Xamarin/android-sdk-macosx"
+    }
+
+    Write-Host "Couldn't locate ANDROID_HOME, using: $androidSdkHome"
+}
+
+Write-Host "Using Android SDK Home: $androidSdkHome"
+
+Write-Host "Installing Global dotnet android tool..."
+dotnet tool install --global --add-source https://www.myget.org/F/xam-dotnet-tools/api/v3/index.json AndroidSdk.Tool
+
+Write-Host "Installing and/or Updating Android SDK..."
+Write-Host "This may take awhile..."
+android --home="$androidSdkHome" sdk download 
+
+Write-Host "Installing API 23..."
+android --home="$androidSdkHome" sdk --install="platforms;android-23"
+
+Write-Host "Installing API 24..."
+android --home="$androidSdkHome" sdk --install="platforms;android-24"
+
+Write-Host "Installing API 25..."
+android --home="$androidSdkHome" sdk --install="platforms;android-25"
+
+Write-Host "Installing API 26..."
+android --home="$androidSdkHome" sdk --install="platforms;android-26"
+
+Write-Host "Installing API 27..."
+android --home="$androidSdkHome" sdk --install="platforms;android-27"
+
+Write-Host "Installing API 28..."
+android --home="$androidSdkHome" sdk --install="platforms;android-28"
+
+Write-Host "Installing API 29..."
+android --home="$androidSdkHome" sdk --install="platforms;android-29"
+
+Write-Host "Installing API 29 Emulator Image (x86_64 - google_apis)..."
+android --home="$androidSdkHome" sdk --install="system-images;android-29;google_apis;x86_64"
+
+Write-Host "Creating XamarinEmulator virtual device..."
+android --home="$androidSdkHome" emulator create XamarinEmulator "system-images;android-29;google_apis;x86_64" --device=Pixel --force
+
+Write-Host "Done!"