How to call local host WCF service in Xamarin Android - Step by Step

1. Create WCF service. Sample 
    WCF service can be read from this link

2. Create solution from Xamarin.
3. Add the WCF service as  Web reference in the solution.
    My WCF service reference name is n192_168_50_233
4. Create one activity and place the controls in the below format,
 
      <TextView>       <EditText>
                                  <Button>
      <ListView>

   Sample UI code:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView
        android:text="Search"
        android:id="@+id/txtView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp" />
    <EditText
        android:id="@+id/txtPatentType"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="#ffe4e9f0"
        android:layout_toRightOf="@+id/txtView"
        android:layout_margin="10dp" />
    <Button
        android:id="@+id/btnSearch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/btnText"
        android:layout_below="@+id/txtView"
        android:layout_alignParentRight="true"
        android:layout_marginRight="10dp" />
    <ListView
        android:minWidth="25px"
        android:minHeight="25px"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/FeedsCollection"
        android:layout_below="@+id/btnSearch"
        android:layout_margin="10dp" />
    <TextView
        android:text=""
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/textView1"
        android:layout_below="@+id/txtView"
        android:layout_toLeftOf="@+id/btnSearch"
        android:layout_alignParentLeft="true"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="10dp" />
</RelativeLayout>

5. Write the below code in Activity.cs file.


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;

using System.ServiceModel;
using System.Threading;

namespace PatentDetails
{
[Activity (Label = "Patent Feeds", MainLauncher=true, Icon = "@drawable/icon")]
public class GetPatentFeedActivity : Activity
{

private Button search;
private EditText patentType;
private ListView feedsCollection;
protected override void OnCreate (Bundle bundle)
{

base.OnCreate (bundle);
SetContentView (Resource.Layout.GetPatentFeed);

search = FindViewById<Button> (Resource.Id.btnSearch);
patentType = FindViewById<EditText> (Resource.Id.txtPatentType);
feedsCollection = FindViewById<ListView> (Resource.Id.FeedsCollection);
search.Click += SearchPatentType;

}

public void SearchPatentType(object sender, EventArgs args){

feedsCollection.Adapter = null;
var feedProgress = ProgressDialog.Show (this, "", "Contacting server. Please wait..", true);
n192_168_50_233.Service1 service = new  PatentDetails.n192_168_50_233.Service1 ();
new Thread (new ThreadStart (delegate {
RunOnUiThread(()=>{
feedProgress.Show();
IAsyncResult asyncResult=service.BeginGetPatentList (patentType.Text, patentFeeds => { },null);
var patent = service.EndGetPatentList (asyncResult);

Toast.MakeText (this,"Feeds count " + patent.Length,ToastLength.Long).Show();

//Load Feeds in CustomFeedsLayout
feedsCollection.Adapter =new FeedsAdapter(this,patent);} );
RunOnUiThread(()=>feedProgress.Hide());
})).Start ();







}
  }

}

6. Write the below code in FeedsAdapter.cs

using System;

using Android.Widget;

using PatentDetails.n192_168_50_233;

using Android.App;

using Android.Views;

namespace PatentDetails

{

public class FeedsAdapter : BaseAdapter<PatentModel>

{

PatentModel[] patentList;

Activity activity;

 

public FeedsAdapter(Activity _activity, PatentModel[] _patentList):base(){

activity = _activity;

patentList = _patentList;

}

#region implemented abstract members of BaseAdapter

public override PatentModel this [int index] {

get {

return patentList [index];

}

}

public override long GetItemId (int position)

{

return position;

}

public override Android.Views.View GetView (int position, Android.Views.View convertView, Android.Views.ViewGroup parent)

{

var patentItem = patentList [position];

View view = convertView;

if (view == null)

view = activity.LayoutInflater.Inflate (Resource.Layout.CustomFeedsLayout, null);

view.FindViewById<TextView> (Resource.Id.textViewTitle).Text = patentItem.Title;

view.FindViewById<TextView> (Resource.Id.textViewLink).Text = patentItem.Link;

view.FindViewById<TextView> (Resource.Id.textViewDescription).Text = patentItem.Description;

view.FindViewById<TextView> (Resource.Id.textViewPublishedDate).Text = patentItem.PublishedDate;

return view;

}

public override int Count {

get {

return patentList.Length;

}

}

#endregion

}

}

7. Create One Layout file in  the name of CustomFeedsLayout.XAML

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent">

    <TextView

        android:text="Text"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/textViewTitle"

        android:textColor="#ffec9f10" />

    <TextView

        android:text="Text"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/textViewLink"

        android:textColor="#ff577ae8" />

    <TextView

        android:text="Text"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/textViewDescription"

        android:textColor="#ffe20ddf" />

    <TextView

        android:text="Text"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:id="@+id/textViewPublishedDate"

        android:textColor="#ff38d6d6" />

</LinearLayout>

8. Xamarin with WCF service consume project is ready..

9. Happy coding.