Android Tutorial - Android Development Guru

MainActivity.java(login Screen) package com.AndroidDevelopmentGuru.database_new; import java.util.List; import android.app.Activity; import android.content.Intent; import android.database.Cursor; import android.os.Bundle; import android.view.MenuItem; 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 {                                 EditText user, pass;                 Button login, not_reg;                 DatabaseHandler db;           ...