package com.example.family.fooddelivery;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
    private String username = "admin";
    private String userpassword = "123123";

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

    public void btnLogin(View view) {
        EditText user = (EditText) findViewById(R.id.editText);
        EditText pass = (EditText) findViewById((R.id.editText2));

        String userN = user.getText().toString();
        String userP = pass.getText().toString();

        if (userN.equals(username) && userP.equals(userpassword)) {
            Intent intent = new Intent(this, MainActivity.class);
            startActivity(intent);
            Toast.makeText(this, "login success", Toast.LENGTH_LONG).show();

        } else {
            Toast.makeText(this, "login again", Toast.LENGTH_LONG).show();
        }
    }

    public void btnRegister(View view) {
        setContentView(R.layout.activity_main2);
        Intent intent = new Intent(this, Main2Activity.class);
    }
}

package com.example.family.fooddelivery;

import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class Main2Activity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        Intent intent = getIntent();
    }

    public void btnRegister2(View view){
        Intent intent = new Intent(this, Main2Activity.class);
        startActivity(intent);
    }
}