[Update v3] LoginActivity.java

package notes.bapakkau;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class LoginActivity extends Activity {
    Button login, batal, keluar;
    Cursor cursor;
    SQLiteDatabase db;
    EditText user, pass;
    Database sqlite, sqlite2;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);
        SQLiteDatabase writableDatabase = new Database(this).getWritableDatabase();
        sqlite2 = new Database(this);
        cursor = sqlite2.getReadableDatabase().rawQuery("Select*from login where status='masuk'", (String[]) null);
        cursor.moveToFirst();
        if (cursor.getCount() > 0) {
            startActivity(new Intent(getBaseContext(), MenuActivity.class));
            finish();
        }
        user = (EditText) findViewById(R.id.edusername);
        pass = (EditText) findViewById(R.id.edpassword);
        login = (Button) findViewById(R.id.btnlogin);
        keluar = (Button) findViewById(R.id.btnkeluar);
        batal = (Button) findViewById(R.id.btnbatal);
        login.setOnClickListener(new View.OnClickListener() {
            public void onClick(View arg0) {
                SQLiteDatabase db = sqlite2.getReadableDatabase();
                cursor = db.rawQuery("Select*from login where username='" + user.getText().toString() + "' and password='" + pass.getText().toString() + "'", (String[]) null);
                cursor.moveToFirst();
                if (LoginActivity.this.cursor.getCount() > 0) {
                    Toast.makeText(getBaseContext(), "Login Berhasil", 0).show();
                    sqlite2.getWritableDatabase().execSQL("update login set status='masuk'");
                    startActivity(new Intent(getBaseContext(), MenuActivity.class));
                    finish();
                    return;
                }
                Toast.makeText(getBaseContext(), "Login Gagal", 0).show();
            }
        });
        batal.setOnClickListener(new View.OnClickListener() {
            public void onClick(View arg0) {
                user.setText("");
                pass.setText("");
                user.requestFocus();
            }
        });

        keluar.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				finish();
				moveTaskToBack(true);
			}
		});
    }
}