Jdk properties are required for external clients to make environment …

src/Xamarin.Android.Tools.AndroidSdk/JdkProperties.cs

@@ -0,0 +1,92 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Xamarin.Android.Tools
+{
+	public class JdkProperties
+	{
+		public string Vendor { get; set; }
+
+		public string Version { get; set; }
+
+		public static JdkProperties Get(string jsdkPath=null)
+		{
+			var props = new JdkProperties();
+
+			var javaPath = GetJavaPath(jsdkPath);
+
+			var processStartInfo = new ProcessStartInfo(javaPath, "-XshowSettings:properties -version");
+			processStartInfo.CreateNoWindow = true;
+			processStartInfo.RedirectStandardError = true;
+			processStartInfo.RedirectStandardOutput = true;
+			processStartInfo.UseShellExecute = false;
+
+			var process = new Process();
+			process.StartInfo = processStartInfo;
+
+			process.OutputDataReceived += (sender, e) =>
+			{
+				ProcessData (props, e.Data);
+			};
+
+			process.ErrorDataReceived += (sender, e) =>
+			{
+				ProcessData (props, e.Data);
+			};
+
+			process.Start();
+
+			process.BeginOutputReadLine();
+			process.BeginErrorReadLine();
+
+			process.WaitForExit(50);
+			while (!process.HasExited)
+				process.WaitForExit(50);
+
+			return props;
+		}
+
+		static void ProcessData(JdkProperties props, string data)
+		{
+			try
+			{
+				if (data != null && data.Contains("java.vm.vendor"))
+					props.Vendor = GetValue(data);
+				else if (data != null && data.Contains("java.version"))
+					props.Version = GetValue(data);
+
+			} catch {
+				// data was discarded
+			}
+		}
+
+		static string GetValue(string data)
+		{
+			var start = data.IndexOf("= ") + 2;
+			var end = data.Length;
+			return data.Substring(start, end - start).Trim();
+		}
+
+		static string GetJavaPath(string javaSdkPath)
+		{
+			string java = "java";
+
+			if (!string.IsNullOrEmpty(javaSdkPath))
+			{
+				java = Path.Combine(javaSdkPath, "bin");
+				java = Path.Combine(java, "java");
+				if (!File.Exists(java))
+					java += ".exe";
+				if (!File.Exists(java))
+					java = "java";
+			}
+
+			return java;
+		}
+	}
+}

src/Xamarin.Android.Tools.AndroidSdk/Xamarin.Android.Tools.AndroidSdk.csproj

@@ -49,6 +49,7 @@
     <Compile Include="ProcessUtils.cs" />
     <Compile Include="AndroidAppManifest.cs" />
     <Compile Include="FileUtil.cs" />
+    <Compile Include="JdkProperties.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>