Android .... สอบถามการดึงข้อมูลจาก mySql เพื่อแสดงผล

package com.example.zero.myapplication;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import android.os.Bundle;
import android.os.StrictMode;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Permission StrictMode
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }

        // Button1
        Button btnGet = (Button)findViewById(R.id.button1);
        btnGet.setOnClickListener(new OnClickListener(){
            public void onClick(View v) {
                // TODO Auto-generated stub
                HttpURLConnection conn = null;
                try {
                    String url = "http://192.168.1.111/show.php?";
                    conn = (HttpURLConnection)new URL(url).openConnection();
                    conn.setRequestMethod("GET");
                    conn.setInstanceFollowRedirects(true);
                    conn.setUseCaches(false);

                    int resultServer = conn.getResponseCode();
                    if (resultServer == HttpURLConnection.HTTP_OK) {
                        InputStream is = conn.getInputStream();
                        ByteArrayOutputStream bos = new ByteArrayOutputStream();

                        int read = 0;
                        while ((read = is.read()) != -1) {
                            bos.write(read);
                        }
                        byte[] result = bos.toByteArray();
                        bos.close();

                        String data = new String(result);

                        Toast.makeText(MainActivity.this,data,Toast.LENGTH_SHORT).show();

                    }
                    else {

                        Toast.makeText(MainActivity.this,"Error Code : " + resultServer,
                                    Toast.LENGTH_SHORT).show();
                    }

                    conn.disconnect();

                } catch (MalformedURLException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        });

    }
}

<uses-permission android:name="android.permission.INTERNET" />