Android Spinner / DropDownList from PHP and MySQL (Web Server)

package com.myapp;

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 org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.os.Bundle;
import android.os.StrictMode;
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.OnItemSelectedListener;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends Activity {
	
    
    @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);
        }
              
        // spinner1
        final Spinner spin = (Spinner)findViewById(R.id.spinner1); 
		
		/** JSON return
		 *  [{"MemberID":"1","Name":"Weerachai","Tel":"0819876107"},
		 * {"MemberID":"2","Name":"Win","Tel":"021978032"},
		 * {"MemberID":"3","Name":"Eak","Tel":"0876543210"}]
		 */
		
		String url = "https://www.thaicreate.com/android/getJSON.php";

		try {
			
			JSONArray data = new JSONArray(getJSONUrl(url));
			
			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("MemberID", c.getString("MemberID"));
    			map.put("Name", c.getString("Name"));
    			map.put("Tel", c.getString("Tel"));
    			MyArrList.add(map);
    			
			}


	        SimpleAdapter sAdap;
	        sAdap = new SimpleAdapter(MainActivity.this, MyArrList, R.layout.activity_column,
	                new String[] {"MemberID", "Name", "Tel"}, new int[] {R.id.ColMemberID, R.id.ColName, R.id.ColTel});      
	        spin.setAdapter(sAdap);
	        
	        final AlertDialog.Builder viewDetail = new AlertDialog.Builder(this);
	        
	        spin.setOnItemSelectedListener(new OnItemSelectedListener() {

				public void onItemSelected(AdapterView<?> arg0, View selectedItemView,
						int position, long id) {


					String sMemberID = MyArrList.get(position).get("MemberID")
							.toString();
					String sName = MyArrList.get(position).get("Name")
							.toString();
					String sTel = MyArrList.get(position).get("Tel")
							.toString();
					
	                //String sMemberID = ((TextView) myView.findViewById(R.id.ColMemberID)).getText().toString();
	                // String sName = ((TextView) myView.findViewById(R.id.ColName)).getText().toString();
	                // String sTel = ((TextView) myView.findViewById(R.id.ColTel)).getText().toString();
	                
					viewDetail.setIcon(android.R.drawable.btn_star_big_on);
					viewDetail.setTitle("Member Detail");
					viewDetail.setMessage("MemberID : " + sMemberID + "\n"
							+ "Name : " + sName + "\n" + "Tel : " + sTel);
					viewDetail.setPositiveButton("OK",
							new DialogInterface.OnClickListener() {
								public void onClick(DialogInterface dialog,
										int which) {
									// TODO Auto-generated method stub
									dialog.dismiss();
								}
							});
					viewDetail.show();
					
				}

				public void onNothingSelected(AdapterView<?> arg0) {
					// TODO Auto-generated method stub
		      	    Toast.makeText(MainActivity.this,
	        	    		"Your Selected : Nothing",
	        	    			Toast.LENGTH_SHORT).show();	
				}


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

    }
    

	public String getJSONUrl(String url) {
		StringBuilder str = new StringBuilder();
		HttpClient client = new DefaultHttpClient();
		HttpGet httpGet = new HttpGet(url);
		try {
			HttpResponse response = client.execute(httpGet);
			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 result..");
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		return str.toString();
	}
	
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
}