Android - แสดงข้อมูลบนลิสได้แล้ว แต่พอคลิกมันไม่ยอมแสดง Dialog Popup แล้วก็ค้างไปเลย

MainActivity.java

package com.example.listviewjson;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.os.Bundle;
import android.os.StrictMode;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {
	
    
    @SuppressLint("NewApi")
	@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Permission StrictMode
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }
        
        final Button btn1 = (Button) findViewById(R.id.button1);
        // Perform action on click
        btn1.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	SearchData();
            }
        });
        
    }
    
    public void SearchData()
    {
    	 // listView1
        final ListView lisView1 = (ListView)findViewById(R.id.listView1); 	
        
   	 	// editText1
        final EditText inputText = (EditText)findViewById(R.id.editText1); 
        
		/**
		 * [{"CustomerID":"C001","Name":"Win Weerachai","Email":"[email protected]" ,"CountryCode":"TH","Budget":"1000000","Used":"600000"},
		 * {"CustomerID":"C002","Name":"John Smith","Email":"[email protected]" ,"CountryCode":"EN","Budget":"2000000","Used":"800000"},
		 * {"CustomerID":"C003","Name":"Jame Born","Email":"[email protected]" ,"CountryCode":"US","Budget":"3000000","Used":"600000"},
		 * {"CustomerID":"C004","Name":"Chalee Angel","Email":"[email protected]" ,"CountryCode":"US","Budget":"4000000","Used":"100000"}]
		 */
		
		String url = "http://www.likehistory.com/getJSON.php";
		
		// Paste Parameters
		List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("txtKeyword", inputText.getText().toString()));

		try {
			JSONArray data = new JSONArray(getJSONUrl(url,params));
			
			final ArrayList<HashMap<String, String>> MyArrList = new ArrayList<HashMap<String, String>>();
			HashMap<String, String> map;
			
			for(int i = 0; i < data.length(); i++){
                JSONObject c = data.getJSONObject(i);
                
    			map = new HashMap<String, String>();
    			map.put("CustomerID", c.getString("CustomerID"));
    			map.put("Name", c.getString("Name"));
    			map.put("Email", c.getString("Email"));
    			map.put("CountryCode", c.getString("CountryCode"));
    			map.put("Budget", c.getString("Budget"));
    			map.put("Used", c.getString("Used"));
    			MyArrList.add(map);
    			
			}


	        SimpleAdapter sAdap;
	        sAdap = new SimpleAdapter(MainActivity.this, MyArrList, R.layout.activity_column,
	                new String[] {"CustomerID", "Name", "Email"}, new int[] {R.id.ColCustomerID, R.id.ColName, R.id.ColEmail});      
	        lisView1.setAdapter(sAdap);
	        
	        final AlertDialog.Builder viewDetail = new AlertDialog.Builder(this);
			// OnClick Item
			lisView1.setOnItemClickListener(new OnItemClickListener() {
				public void onItemClick(AdapterView<?> myAdapter, View myView,
						int position, long mylng) {
	
					String strCustomerID = MyArrList.get(position).get("CustomerID")
							.toString();
					String sName = MyArrList.get(position).get("Name")
							.toString();
					String strEmail = MyArrList.get(position).get("Email")
							.toString();
					String strCounryCode = MyArrList.get(position).get("CounryCode")
							.toString();
					String strBudget = MyArrList.get(position).get("Budget")
							.toString();
					String strUsed = MyArrList.get(position).get("Used")
							.toString();

					viewDetail.setIcon(android.R.drawable.btn_star_big_on);
					viewDetail.setTitle("Member Detail");
					viewDetail.setMessage("MemberID : " + strCustomerID + "\n"
							+ "Name : " + sName + "\n" 
							+ "strEmail : " + strEmail + "\n" 
							+ "strCounryCode : " + strCounryCode + "\n" 
							+ "strBudget : " + strBudget + "\n"
							+ "Used : " + strUsed);
					viewDetail.setPositiveButton("OK",
							new DialogInterface.OnClickListener() {
								public void onClick(DialogInterface dialog,
										int which) {
									// TODO Auto-generated method stub
									dialog.dismiss();
								}
							});
					viewDetail.show();

				}
			});
			
	        
		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }
    

	public String getJSONUrl(String url,List<NameValuePair> params) {
		StringBuilder str = new StringBuilder();
		HttpClient client = new DefaultHttpClient();
		HttpPost httpPost = new HttpPost(url);
		
		try {
			httpPost.setEntity(new UrlEncodedFormEntity(params));
			HttpResponse response = client.execute(httpPost);
			StatusLine statusLine = response.getStatusLine();
			int statusCode = statusLine.getStatusCode();
			if (statusCode == 200) { // Download OK
				HttpEntity entity = response.getEntity();
				InputStream content = entity.getContent();
				BufferedReader reader = new BufferedReader(new InputStreamReader(content));
				String line;
				while ((line = reader.readLine()) != null) {
					str.append(line);
				}
			} else {
				Log.e("Log", "Failed to download file..");
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return str.toString();
	}
	
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
}