Android - ค้นหาภาษาไทยไม่ได้ ฐานข้อมูล mysql โดยใช้ Json ดึงข้อมูล

package com.example.last;

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.JSONObject;

import android.os.Bundle;
import android.os.StrictMode;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

public class Search_th extends Activity {
	
	ArrayList<HashMap<String, String>> MyArrList;
	    
    @SuppressLint("NewApi")
	@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.search_th);
        setTitle("Medicinal plants and herbs");

        // Permission StrictMode
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }
        
        ShowData();
        
        
        // btnSearch
        final Button btnSearch = (Button) findViewById(R.id.btnSearch);
        //btnSearch.setBackgroundColor(Color.TRANSPARENT);
        // Perform action on click
        btnSearch.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	//btnSearch.setText(strKeySearch.getText());
            	ShowData();
            }
        });
        
    }
    
    public void ShowData()
    {
    	 // listView1
        final ListView lisView1 = (ListView)findViewById(R.id.listView1); 	
        
        // keySearch
        EditText strKeySearch = (EditText)findViewById(R.id.txtKeySearch); 
        
        // Disbled Keyboard auto focus
        InputMethodManager imm = (InputMethodManager)getSystemService(
      	      Context.INPUT_METHOD_SERVICE);
      	imm.hideSoftInputFromWindow(strKeySearch.getWindowToken(), 0);
        
		
      	String ip = "nap21.fulba.com";
		String url = "http://"+ip+"/json/showAllDatapy.php";
		// Paste Parameters
		List<NameValuePair> params = new ArrayList<NameValuePair>();
		try {
		String txtKeyword = strKeySearch.getText().toString();
		
        params.add(new BasicNameValuePair("txtKeyword", txtKeyword));
		
			JSONArray data = new JSONArray(getJSONUrl(url, params));
			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("herb_id", c.getString("herb_id"));
    			map.put("herb_name", c.getString("herb_name"));
    			map.put("name_sci", c.getString("name_sci"));
    			map.put("herb_gene", c.getString("herb_gene"));
    			map.put("herb_fix", c.getString("herb_fix"));
    			map.put("herb_pic", c.getString("herb_pic"));
    			MyArrList.add(map);
    			
			}
			
			lisView1.setAdapter(new ImageAdapter(this));
			
			lisView1.setOnItemClickListener(new OnItemClickListener() {
				public void onItemClick(AdapterView<?> myAdapter, View myView,
						int position, long mylng) {
	
					String herb_id = MyArrList.get(position).get("herb_id")
							.toString();
					Intent newActivity = new Intent(Search_th.this,DetailActivity_th.class);
					newActivity.putExtra("herb_id", herb_id);
					startActivity(newActivity);

				}
			});
	        
		} catch (Exception e) {
			// TODO Auto-generated catch block
			Log.e("Json", e.toString());
			//e.printStackTrace();
		}
    }
    
    
    public class ImageAdapter extends BaseAdapter 
    {
        private Context context;

        public ImageAdapter(Context c) 
        {
        	// TODO Auto-generated method stub
            context = c;
        }
 
        public int getCount() {
        	// TODO Auto-generated method stub
            return MyArrList.size();
        }
 
        public Object getItem(int position) {
        	// TODO Auto-generated method stub
            return position;
        }
 
        public long getItemId(int position) {
        	// TODO Auto-generated method stub
            return position;
        }
		public View getView(final int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			
			LayoutInflater inflater = (LayoutInflater) context
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
			
				if (convertView == null) {
					convertView = inflater.inflate(R.layout.activity_column_th, null); 
				}

				// ColMemberID
				TextView txtMemberID = (TextView) convertView.findViewById(R.id.ColMemberID);
				txtMemberID.setPadding(10, 0, 0, 0);
				txtMemberID.setText(MyArrList.get(position).get("herb_id") +".");
				
				// R.id.ColName
				TextView txtName = (TextView) convertView.findViewById(R.id.ColName);
				txtName.setPadding(5, 0, 0, 0);
				txtName.setText(MyArrList.get(position).get("herb_name"));
				
				// R.id.ColTel
				
	 
				return convertView;
				
		}

    } 
    

	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 result..");
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return str.toString();
	}
	
    
    
}

<?php
		$objConnect=mysql_connect("localhost","root", "abc1234");
		$objDB = mysql_select_db("test");
		mysql_query("SET character_set_results=utf8");
		mysql_query("SET character_set_client=utf8");
		mysql_query("SET character_set_connection=utf8");
	
	// $_POST["txtKeyword"] = "a"; // for Sample
	
	$strKeyword = $_POST["txtKeyword"];
	
	$strSQL = "SELECT * FROM herb_data_th WHERE herb_name LIKE '%".$strKeyword."%' ";

	$objQuery = mysql_query($strSQL);
	$intNumField = mysql_num_fields($objQuery);
	$resultArray = array();
	while($obResult = mysql_fetch_array($objQuery))
	{
		$arrCol = array();
		for($i=0;$i<$intNumField;$i++)
		{
			$arrCol[mysql_field_name($objQuery,$i)] = $obResult[$i];
		}
		array_push($resultArray,$arrCol);
	}
	
	mysql_close($objConnect);
	//echo $strKeyword."";
	echo json_encode($resultArray);
?>

httpPost.setEntity(new UrlEncodedFormEntity(params,"UTF-8"));