Android อยากจะเพิ่มฟังชั่นให้ส่งค่าไป Select Database ก่อน แล้วดึงค่าที่ Select ออกมาแสดงครับ

package com.androidtutorialpoint.androidlogin;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.widget.SwipeRefreshLayout;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import org.apache.http.HttpEntity;
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.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

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


public class TopicActivity extends Activity {
    String GetUser;
	private SwipeRefreshLayout refresh;
	private TextView userTextView;
	private TextView idTextView;
	ListView listCollege;
	ProgressBar proCollageList;

	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_topic);

		refresh = (SwipeRefreshLayout)
				findViewById(R.id.swipe_refresh_layout);

		refresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
			@Override
			public void onRefresh() {
				Intent intent = getIntent();
				finish();
				overridePendingTransition( 0, 0);
				startActivity(intent);
				overridePendingTransition( 0, 0);
			}
		});

		Bundle bundle = getIntent().getExtras();

		listCollege = (ListView)findViewById(R.id.listCollege);
		proCollageList = (ProgressBar)findViewById(R.id.proCollageList);

		final String user = bundle.getString("username");
		final String id = bundle.getString("userid");

		userTextView = (TextView) findViewById(R.id.username_text);
		userTextView.setText(user);
		idTextView = (TextView) findViewById(R.id.userid_text);
		idTextView.setText(id);

		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
		SharedPreferences.Editor editor = prefs.edit();
		editor.putString("username", user);
		editor.putString("userid", id);
		editor.commit();

	new GetHttpResponse(this).execute();

	}


	private class GetHttpResponse extends AsyncTask<Void, Void, Void>
	{
		private Context context;
		String result;
		List<cources> collegeList;
		public GetHttpResponse(Context context)
		{
			this.context = context;
		}

		@Override
		protected void onPreExecute()
		{
			super.onPreExecute();
		}

		@Override
		protected Void doInBackground(Void... arg0)
		{
			HttpService httpService = new HttpService("https://thongkumdee.000webhostapp.com/courses.php");
			try
			{
				httpService.ExecutePostRequest();

				if(httpService.getResponseCode() == 200)
				{
					result = httpService.getResponse();
					Log.d("Result", result);
					if(result != null)
					{
						JSONArray jsonArray = null;
						try {
							jsonArray = new JSONArray(result);

							JSONObject object;
							JSONArray array;
							cources college;
							collegeList = new ArrayList<cources>();
							for(int i=0; i<jsonArray.length(); i++)
							{
								college = new cources();
								object = jsonArray.getJSONObject(i);

								college.product_id = object.getString("sc_poker_product");
								college.cources_description = object.getString("sc_product_story");
								collegeList.add(college);
							}
						}
						catch (JSONException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
					}
				}
				else
				{
					Toast.makeText(context, httpService.getErrorMessage(), Toast.LENGTH_SHORT).show();
				}
			}
			catch (Exception e)
			{
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			return null;
		}

		@Override
		protected void onPostExecute(Void result)

		{
			proCollageList.setVisibility(View.GONE);
			listCollege.setVisibility(View.VISIBLE);
			if(collegeList != null)
			{
			ListAdapter adapter = new ListAdapter(collegeList, context);
			listCollege.setAdapter(adapter);
			}
		}
	}

	public class HttpService
	{
		private ArrayList<NameValuePair> params;
		private ArrayList<NameValuePair> headers;

		private String url;
		private int responseCode;
		private String message;
		private String response;

		public String getResponse()
		{
			return response;
		}

		public String getErrorMessage()
		{
			return message;
		}

		public int getResponseCode() 
		{
			return responseCode;
		}

		public HttpService(String url)
		{
			this.url = url;
			params = new ArrayList<NameValuePair>();
			headers = new ArrayList<NameValuePair>();
		}

		public void AddParam(String name, String value)
		{
			params.add(new BasicNameValuePair(name, value));
		}

		public void AddHeader(String name, String value)
		{
			headers.add(new BasicNameValuePair(name, value));
		}

		public void ExecuteGetRequest() throws Exception
		{
			String combinedParams = "";
			if(!params.isEmpty())
			{
				combinedParams += "?";
				for(NameValuePair p : params)
				{
					String paramString = p.getName() + "=" + URLEncoder.encode(p.getValue(),"UTF-8");
					if(combinedParams.length() > 1)
					{
						combinedParams  +=  "&" + paramString;
					}
					else
					{
						combinedParams += paramString;
					}
				}
			}

			HttpGet request = new HttpGet(url + combinedParams);
			for(NameValuePair h : headers)
			{
				request.addHeader(h.getName(), h.getValue());
			}

			executeRequest(request, url);
		}

		public void ExecutePostRequest() throws Exception
		{
			HttpPost request = new HttpPost(url);
			for(NameValuePair h : headers)
			{
				request.addHeader(h.getName(), h.getValue());
			}

			if(!params.isEmpty())
			{
				request.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
			}

			executeRequest(request, url);
		}

		private void executeRequest(HttpUriRequest request, String url)
		{
			HttpParams httpParameters = new BasicHttpParams();
			int timeoutConnection = 10000;
			HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
			int timeoutSocket = 10000;
			HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
			
			HttpClient client = new DefaultHttpClient(httpParameters);
			HttpResponse httpResponse;
			try
			{
				httpResponse = client.execute(request);
				responseCode = httpResponse.getStatusLine().getStatusCode();
				message = httpResponse.getStatusLine().getReasonPhrase();

				HttpEntity entity = httpResponse.getEntity();
				if (entity != null) 
				{
					InputStream instream = entity.getContent();
					response = convertStreamToString(instream);
					instream.close();
				}
			} 
			catch (ClientProtocolException e)
			{
				client.getConnectionManager().shutdown();
				e.printStackTrace();
			} 
			catch (IOException e)
			{
				client.getConnectionManager().shutdown();
				e.printStackTrace();
			}
		}

		private String convertStreamToString(InputStream is)
		{
			BufferedReader reader = new BufferedReader(new InputStreamReader(is));
			StringBuilder sb = new StringBuilder();

			String line = null;
			try 
			{
				while ((line = reader.readLine()) != null) 
				{
					sb.append(line + "\n");
				}
			} 
			catch (IOException e)
			{
				e.printStackTrace();
			}
			finally 
			{
				try 
				{
					is.close();
				} 
				catch (IOException e)
				{
					e.printStackTrace();
				}
			}
			return sb.toString();
		}
	}

}

<?php
$hostname = "localhost";
$username = "id1479268_staporn";
$password = "054324696t";
$dbname = "id1479268_sc_db";

// Create connection
$conn = new mysqli($hostname, $username, $password, $dbname);

if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 

$id_user = 'us0005';

$sql = "SELECT * FROM sc_poker,sc_productbacklog WHERE sc_productbacklog.sc_product_id = sc_poker.sc_poker_product AND sc_poker_product NOT IN (SELECT sc_vote_product FROM sc_vote WHERE sc_vote_user = '$id_user')";
$result = $conn->query($sql);

if ($result->num_rows >0) {
    // output data of each row
    while($row[] = $result->fetch_assoc()) {	
	$tem = $row;	
	$json = json_encode($tem);
    }
	
} else {
    echo "0 results";
}
 echo $json;
$conn->close();
?>