Develop an android application to accept username and password from the end user using TextView and EditText

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center_vertical"
    android:orientation="vertical"
    tools:context=".MainActivity"
    android:padding="10dp">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Enter Username"
        style="@android:style/TextAppearance.Large"/>

    <EditText
        android:id="@+id/etUsername"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="text"
        style="@android:style/TextAppearance.Large" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Enter Password"
        android:layout_marginTop="10dp"
        style="@android:style/TextAppearance.Large" />

    <EditText
        android:id="@+id/etPassword"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPassword"
        style="@android:style/TextAppearance.Large" />

    <Button android:id="@+id/btnLogin"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Login"
        android:layout_gravity="right"
        android:layout_marginTop="20dp"
        style="@android:style/TextAppearance.Large"/>
</LinearLayout>

MainActivity.java

package com.example.userloginapp;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    EditText etUsername, etPassword;
    Button btnLogin;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        etUsername = findViewById(R.id.etUsername);
        etPassword = findViewById(R.id.etPassword);
        btnLogin = findViewById(R.id.btnLogin);

        btnLogin.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                String uname = etUsername.getText().toString();
                String pwd = etPassword.getText().toString();
                
                if(uname.equals("admin") && pwd.equals("123")) {
                    Toast.makeText(getApplicationContext(), "Login Successful", Toast.LENGTH_SHORT).show();
                }
                else {
                    Toast.makeText(getApplicationContext(), "Login Unsuccessful", Toast.LENGTH_SHORT).show();
                }
             }
        });
    }
}

OUTPUT