Android : ค่าจาก ArrayList ไม่เข้าไปใน Listview รบกวนช่วยแนะนำผมที

package com.royle.project_end;

import java.util.ArrayList;
import java.util.HashMap;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Spinner;
import android.widget.Toast;

public class DialogSelectProvinceActivity extends Activity {
	
	private final String TAG = "internet";
	private ListView listview_province;
	private MyHttpPost poster;
	Context context;
	ArrayList<HashMap<String, String>> MyArrList = new ArrayList<HashMap<String, String>>();
	     HashMap<String, String> map;
	
	     
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.layout_select_province_dialog);
		
		 
		context = this;
		
		final String id = "aaa";
		
		poster = new MyHttpPost("http://192.168.1.3/test_projectEnd/province.php?when="+System.currentTimeMillis(),context);
		
		ArrayList<NameValuePair> data = new ArrayList<NameValuePair>();
		data.add(new BasicNameValuePair("id",id));
		
		poster.doPost(data, new Handler( ){
			
			public void handleMessage(android.os.Message msg){
				switch(msg.what){
				case MyHttpPost.HTTP_POST_ERROR:
				//respone_username.setText((String)msg.obj);
				break;
				case MyHttpPost.HTTP_POST_OK:
					String response = (String)msg.obj;
					//Toast.makeText(context, response, Toast.LENGTH_LONG).show();
					
					try {
						JSONArray object = new JSONArray(response);
						
						
						
						
						for(int i = 0; i < object.length(); i++){
					              JSONObject c = object.getJSONObject(i);
					              
					  			String Province_id = c.getString("PROVINCE_ID");
					  			String Province_name = c.getString("PROVINCE_NAME");
					  			//Toast.makeText(context, province_id + ":"+ province_name, Toast.LENGTH_LONG).show();
					  			
					              map = new HashMap<String, String>();
					              map.put("province_id", Province_id);
					              map.put("province_name", Province_name);
					              MyArrList.add(map);
					              Log.d(TAG,Province_name);
					           
						}
												
					} catch (JSONException e) {
						Toast.makeText(context, "Unable to convert to Json", Toast.LENGTH_SHORT).show();
						e.printStackTrace();
					}
					
				}
			}
			
		});	
		 
			 			listview_province = (ListView) findViewById(R.id.listView_province1);
						ListAdapter adapter = new SimpleAdapter(this, MyArrList, R.layout.row_layout_select_province, 
								new String[]{"province_id","province_name"},
								new int[]{R.id.textView_province_id,R.id.textView_province_name} );
						listview_province.setAdapter(adapter);	
		
			
						
		
		

	}
}