Unable to Call Wcf Service from Android ?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;

namespace RestfulService
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
    [ServiceContract]
    public interface IService1
    {
        [OperationContract]
        [XmlSerializerFormat(Style = OperationFormatStyle.Document, Use = OperationFormatUse.Literal)]
        [WebInvoke(BodyStyle = WebMessageBodyStyle.Bare, RequestFormat = WebMessageFormat.Xml,
        Method = "GET", ResponseFormat = WebMessageFormat.Xml, UriTemplate = "/GetDateTime")] 

        
        string GetDateTime();     
    }


    
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;

namespace RestfulService
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together.
    public class Service1 : IService1
    {

        #region IService1 Members

        public string GetDateTime()
        {
            return DateTime.Now.ToString();
        }

        #endregion
    }
}

<system.webServer>
		<validation validateIntegratedModeConfiguration="false"/>
		<modules>
			<remove name="ScriptModule"/>
			<add name="ScriptModule" preCondition="managedHandler" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
		</modules>
		<handlers>
			<remove name="WebServiceHandlerFactory-Integrated"/>
			<remove name="ScriptHandlerFactory"/>
			<remove name="ScriptHandlerFactoryAppServices"/>
			<remove name="ScriptResource"/>
			<add name="ScriptHandlerFactory" verb="*" path="*.asmx" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
			<add name="ScriptHandlerFactoryAppServices" verb="*" path="*_AppService.axd" preCondition="integratedMode" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
			<add name="ScriptResource" preCondition="integratedMode" verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
		</handlers>
	</system.webServer>
	<runtime>
		<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1" appliesTo="v2.0.50727"><dependentAssembly>
				<assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/>
				<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
			</dependentAssembly>
			<dependentAssembly>
				<assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/>
				<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
			</dependentAssembly>
		</assemblyBinding></runtime>
	<system.serviceModel>
		<services>
			<service name="RestfulService.Service1" behaviorConfiguration="RestfulService.Service1Behavior">
				<!-- Service Endpoints -->
				<endpoint address="GetDateTime" binding="webHttpBinding" contract="RestfulService.IService1" behaviorConfiguration="Web" bindingConfiguration="">
					<!-- 
              Upon deployment, the following identity element should be removed or replaced to reflect the 
              identity under which the deployed service runs.  If removed, WCF will infer an appropriate identity 
              automatically.
          -->
					<identity>
						<dns value="localhost"/>
					</identity>
				</endpoint>
				<host>
					<baseAddresses>
						<add baseAddress="http://223.30.26.198/mywcf"/>
					</baseAddresses>
				</host>
				<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
			</service>
		</services>
		<behaviors>
			<endpointBehaviors>
				<behavior name="Web">
					<webHttp/>
				</behavior>
			</endpointBehaviors>
			<serviceBehaviors>
				<behavior name="RestfulService.Service1Behavior">
					<!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
					<serviceMetadata httpGetEnabled="true"/>
					<!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
					<serviceDebug includeExceptionDetailInFaults="false"/>
				</behavior>
			</serviceBehaviors>
		</behaviors>
	</system.serviceModel>

package com.mkyong.android;


import java.io.IOException;
import java.net.URI;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;

import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import android.app.Activity;


import android.os.Bundle;
import android.widget.Button;
import android.widget.TextView;
import android.view.View;
import android.view.View.OnClickListener;

public class AppActivity extends Activity {

	Button button;
	TextView tctVw;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		addListenerOnButton();
	}

	public void addListenerOnButton() {

		 

		button = (Button) findViewById(R.id.button1);
		tctVw=(TextView) findViewById(R.id.textView1);

		button.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View arg0) {
				
				try
				{
				
					DefaultHttpClient httpClient = new DefaultHttpClient();
			        HttpGet request = new HttpGet("http://223.30.26.198/mywcf/Service1.svc/GetDateTime");
			        request.setHeader("Accept", "application/xml");
			        request.setHeader("Content-type", "application/xml");
			        HttpResponse response = httpClient.execute(request);
		        	HttpEntity entity = response.getEntity();
		        	String result = EntityUtils.toString(entity);
		        	tctVw.setText(result);
			        	
				}
				catch (Exception e)
				{
					e.printStackTrace();
					
                    					
				}

			}

		});

	}

}