LoginDatabase login.java

package com.example.logindatabase;

import java.util.ArrayList;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import Class.Connection;
import Class.CustomHttpClient;

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

public  class login extends Activity implements OnClickListener {

    EditText username, password;
    Button login, exit;

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

        username    = (EditText)findViewById(R.id.edittext_username);
        password    = (EditText)findViewById(R.id.edittext_password);

        login       = (Button)findViewById(R.id.button_login);
        login.setOnClickListener(this);

        exit        = (Button)findViewById(R.id.button_exit);
        exit.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        // Button Login
        if (v == login){

            //=======================================================================
            // Ini untuk kirim Parameter yang diinput username & password ke PHP
            //=======================================================================

            ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
            postParameters.add(new BasicNameValuePair("post_username", username.getText().toString()));
            postParameters.add(new BasicNameValuePair("post_password", password.getText().toString()));

            String response = null;

            //=======================================================================
            // Ini untuk koneksi ke Database MySQL
            //=======================================================================
            try {

                //===================================================================
                // IP       : dari Class Connection (IP localhost 10.0.2.2)
                // URL_login: dari Class Connection, untuk mengakses lokasi PHP
                //===================================================================
                response = CustomHttpClient.executeHttpPost(Connection.IP + Connection.URL_login, postParameters);
                String res = response.toString();
                res = res.trim();
                res = res.replaceAll("\\s+", "");

                // ini untuk notif jika koneksi tidak berhasil
                Toast.makeText(login.this, res, Toast.LENGTH_LONG).show();

                // String valid = "1";
                // Jika Berhasil data valid
                if (res.equals("1")) {

                    Intent i = new Intent(login.this, home.class);
                    startActivity(i);
                }
                else {
                    Toast.makeText(login.this, "Gagal Login Gan!", Toast.LENGTH_LONG).show();
                }

            } catch (Exception e) {
                Toast.makeText(login.this, "Kesalahan di Koneksinya Gan!", Toast.LENGTH_LONG).show();
            }
        }

        // Button Exit
        else if (v == exit) {
            finish();
            System.exit(0);
        }
    }
}