Android - ไม่สามารถเชื่อมต่อเข้ากับ database ได้ แต่เวลารันแล้วไม่ error ต้องทำยังไงครับ

package com.ammaew.project;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
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.JSONObject;

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {
	EditText etUser, etPass;
	Button bLogin;
	String username,password;
	HttpClient httpclient;
	HttpPost httppost;
	ArrayList<NameValuePair> nameValuePairs;
	HttpResponse response;
	HttpEntity entity;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initialise();
	}
	
	
	
	private void initialise() {
		// TODO Auto-generated method stub
		etUser = (EditText) findViewById(R.id.etUser);
		etPass = (EditText) findViewById(R.id.etPass);
		bLogin = (Button) findViewById(R.id.btnLogin);
		bLogin.setOnClickListener(this);
	}



	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}



	@Override
	public void onClick(View v) {
		
		httpclient = new DefaultHttpClient();
		httppost = new HttpPost("http://192.168.1.34/dw-db/project.php");
		username = etUser.getText().toString();
		password = etPass.getText().toString();

		try{
			
			nameValuePairs = new ArrayList<NameValuePair>();
			
			
			nameValuePairs.add(new BasicNameValuePair("username", username));
			nameValuePairs.add(new BasicNameValuePair("password", password));
			
			httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
			response = httpclient.execute(httppost);
			
			if(response.getStatusLine().getStatusCode() == 200){
				
				entity = response.getEntity();
				if(entity != null){
					
					InputStream instream = entity.getContent();
					JSONObject jsonResponse = new JSONObject(convertStreamToString(instream));
					String retUser = jsonResponse.getString("user");
					String retPass = jsonResponse.getString("pass");
					
					if(username.equals(retUser)&& password.equals(retPass)){
						
						SharedPreferences sp = getSharedPreferences("logindetails", 0);
						SharedPreferences.Editor spedit = sp.edit();
						spedit.putString("user", username);
						spedit.putString("pass", password);
						spedit.commit();
						
						Toast.makeText(getBaseContext(), "Login Success!", Toast.LENGTH_SHORT).show();
						
					}else{
						
						Toast.makeText(getBaseContext(),"Invalid Login Details", Toast.LENGTH_SHORT).show();
						
					}
				}
			}
			
		}catch(Exception e){
			e.printStackTrace();
			
			Toast.makeText(getBaseContext(),"Incorrect Username or Password", Toast.LENGTH_LONG).show();
		}
		
	}
	
	private static String convertStreamToString(InputStream is) {
        /*
         * To convert the InputStream to String we use the BufferedReader.readLine()
         * method. We iterate until the BufferedReader return null which means
         * there's no more data to read. Each line will appended to a StringBuilder
         * and returned as String.
         */
        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
error_reporting(E_ALL ^ E_NOTICE ^ E_WARNING);
$dbhost = "localhost";
$dbuser = "root";
$dbpass = "ammaew";
$dbdb = "project";
$connect = mysql_connect($dbhost,$dbuser,$dbpass) or die("connection erreor...");
mysql_select_db($dbdb)or die("database selection errer");
echo("Complete");
$username = $_POST['username'];
$password = $_POST['password'];
$query = mysql_query("SELECT * FROM project1 WHERE user='$username' AND pass ='$password'");
$num = mysql_num_rows($query);
if($num == 1){
	while($list=mysql_fetch_assoc($query)){
		
		$output = $list;
		echo json_encode($output);
	}
	
	mysql_close();
}

?>