java,// MainActivity.java,package com.example.loginapp;,,import android.os.Bundle;,import android.view.View;,import android.widget.Button;,import android.widget.EditText;,import android.widget.Toast;,import androidx.appcompat.app.AppCompatActivity;,,public class MainActivity extends AppCompatActivity {, private EditText usernameEditText, passwordEditText;, private Button loginButton, registerButton;,, @Override, protected void onCreate(Bundle savedInstanceState) {, super.onCreate(savedInstanceState);, setContentView(R.layout.activity_main);,, usernameEditText = findViewById(R.id.username);, passwordEditText = findViewById(R.id.password);, loginButton = findViewById(R.id.login);, registerButton = findViewById(R.id.register);,, loginButton.setOnClickListener(new View.OnClickListener() {, @Override, public void onClick(View v) {, String username = usernameEditText.getText().toString();, String password = passwordEditText.getText().toString();, if (validateLogin(username, password)) {, Toast.makeText(MainActivity.this, "Login Successful", Toast.LENGTH_SHORT).show();, } else {, Toast.makeText(MainActivity.this, "Invalid Credentials", Toast.LENGTH_SHORT).show();, }, }, });,, registerButton.setOnClickListener(new View.OnClickListener() {, @Override, public void onClick(View v) {, String username = usernameEditText.getText().toString();, String password = passwordEditText.getText().toString();, if (registerUser(username, password)) {, Toast.makeText(MainActivity.this, "Registration Successful", Toast.LENGTH_SHORT).show();, } else {, Toast.makeText(MainActivity.this, "Registration Failed", Toast.LENGTH_SHORT).show();, }, }, });, },, private boolean validateLogin(String username, String password) {, // Add your validation logic here, return true; // Placeholder return value, },, private boolean registerUser(String username, String password) {, // Add your registration logic here, return true; // Placeholder return value, },},
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`xml,,,,,,,,,,,,
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