สอบถาม Android Json แล้วจะตัดเอาเฉาะข้อความที่ใช้ได้อย่าไรครับ

    mysql_connect($host,$user,$pass);
    mysql_query("SET NAMES UTF8");
    mysql_query("USE $db");
 
    $compound = $_REQUEST['compound'];
	
    $sql = "SELECT effect FROM effect_db WHERE codename='$compound'";
    $result = mysql_query($sql);
	if(isset($_POST["compound"])){
    if($result){
        while($row = mysql_fetch_array($result))
            $data[] = $row;
 
        $json = array('status' => "OK",'result' => $data);
    }else{
        $json = array('status' => "ERROR");
    }
	}else{
		$json["result"]="error";
		
	}
 
    print(json_encode($json));
    mysql_close();
?>

package example.testjson;

import java.util.ArrayList;

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.os.Bundle;
import android.os.Handler;
import android.app.Activity;
import android.content.Context;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
	private TextView result;
	private Context context;
	private MyHTTP_Post poster;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		context = this;

		result = (TextView) findViewById(R.id.result);

		String compound_id = "D0001";
		poster = new MyHTTP_Post("http://192.168.1.8/myweb/jsondrugeffect.php");
		ArrayList<NameValuePair> data = new ArrayList<NameValuePair>();
		data.add(new BasicNameValuePair("compound", compound_id));
		poster.doPost(data, new Handler() {
			public void handleMessage(android.os.Message msg) {
				switch (msg.what) {
				case MyHTTP_Post.HTTP_POST_ERROR:
					result.setText((String) msg.obj);

					break;
				case MyHTTP_Post.HTTP_POST_OK:
					String jsonString = (String) msg.obj;
					try {
						JSONObject object = new JSONObject(jsonString);
						String name_effect = object.getString("result");

						MainActivity.this.result.setText(name_effect);

					} catch (JSONException e) {
						Toast.makeText(getApplicationContext(), "JSON ERROR!!",
								Toast.LENGTH_LONG).show();
						e.printStackTrace();
					}

					break;

				}
			};
		});

	}

}

package example.testjson;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
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.protocol.HTTP;
import org.apache.http.util.EntityUtils;

import android.os.Handler;
import android.os.Message;

public class MyHTTP_Post {
	private HttpClient client;
	private HttpPost post;
	private HttpResponse response;
	private Thread thread;

	public static final int HTTP_POST_OK = 1;
	public static final int HTTP_POST_ERROR = 2;

	public MyHTTP_Post(String link) {
		client = new DefaultHttpClient();
		post = new HttpPost(link);

	}

	public void doPost(final ArrayList<NameValuePair> data,
			final Handler handler) {
		thread = new Thread() {
			@Override
			public void run() {
				Message message = new Message();

				try {
					post.setEntity(new UrlEncodedFormEntity(data, HTTP.UTF_8));
					response = client.execute(post);
					message.what = HTTP_POST_OK;
					message.obj = EntityUtils.toString(response.getEntity());
				} catch (UnsupportedEncodingException e) {
					e.printStackTrace();
					message.what = HTTP_POST_ERROR;
				} catch (ClientProtocolException e) {
					e.printStackTrace();
					message.what = HTTP_POST_ERROR;
				} catch (Exception e) {
					e.printStackTrace();
					message.what = HTTP_POST_ERROR;
				} finally {
					handler.sendMessage(message);
				}
			}

		};
		thread.start();

	}
}