Android สอบถามการเก็บค่าจาก Spinner ที่เลือกลง Database (PHP/MySQL)

package com.example.hello_oppa;

import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONObject;

import twitter4j.Twitter;
import twitter4j.auth.AccessToken;
import twitter4j.auth.RequestToken;

import com.example.hello_oppa.adapter.CategoryArtistAdapter;
import com.example.hello_oppa.model.Artist_Model;
import com.example.hello_oppa.service.JSONParser;
import com.example.hello_oppa.twitter.ConstantValues;
import com.example.hello_oppa.twitter.TwitterUtil;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

public class ChooseArtistActivity extends Activity {
	
	Spinner category_artist;
	TextView ArtistName;
	
	private ArrayList<Artist_Model> artist_data;
	private Artist_Model model = null;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.layout_chooseartist);

		// custom my action bar
		ActionBar actionbar = getActionBar();
		actionbar .setTitle("ADD NEW ARTIST");
		// back navigation
		actionbar.setDisplayHomeAsUpEnabled(true);
		// hide icon app
		getActionBar().setDisplayShowHomeEnabled(false);
		
		ArtistName = (TextView) findViewById(R.id.ArtistName);
		
		Button BTNchoose = (Button) findViewById(R.id.BTNchooseArtist);
		BTNchoose.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				Intent intent = new Intent(ChooseArtistActivity.this, MainActivity.class);
				startActivity(intent);
			}
		});
		
//		//login twitter
//		Uri uri = getIntent().getData();
//	    String verifier = uri.getQueryParameter(ConstantValues.URL_PARAMETER_TWITTER_OAUTH_VERIFIER); 
// 
//	    TwitterGet get=new TwitterGet();
//	    get.execute(verifier);
		
		//
		artist_data = new ArrayList<Artist_Model>();
//		String url = "http://www.leveltistweb09.com/Hello_Oppa/get_artist.php";
		String url = "http://su13540254.2th.asia/Hello_Oppa/get_artist.php";
		JSONParser json = new JSONParser();
		String dataJSON = json.makeHttpRequest(url, JSONParser.methodGet, null);

		JSONArray jsArr;
		JSONObject jsOBJ;
		JSONObject jsOBJ2;
		try {

			jsOBJ = new JSONObject(dataJSON);
			jsArr = jsOBJ.getJSONArray("artist");
			for (int i = 0; i < jsArr.length(); i++) 
			{

				jsOBJ2 = jsArr.getJSONObject(i);
				int artist_id = jsOBJ2.getInt("artist_id");
				String artist_name = jsOBJ2.getString("artist_name");
				String artist_tag = jsOBJ2.getString("artist_tag");
				String artist_img = jsOBJ2.getString("artist_img");
				model = new Artist_Model(artist_id, artist_name, artist_tag, artist_img);
				artist_data.add(model);

			}

		} catch (Exception e) {
			e.printStackTrace();
		}

		
		// spinner
		category_artist = (Spinner) findViewById(R.id.Spinartist);
		CategoryArtistAdapter myAdapter = new CategoryArtistAdapter(this, R.layout.item_dropdown, artist_data);
		category_artist.setAdapter(myAdapter);
		
		//setOnItemSelectedListener
		category_artist.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() 
		{	    
			@Override
		    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
				String artist_name = artist_data.get(position).getArtist_name().toString();
			    ArtistName.setText(artist_name);
		    }

			@Override
			public void onNothingSelected(AdapterView<?> arg0) {
				// TODO Auto-generated method stub
			}	
		});
	
	}//end onCreate
}