MainActivity.java

package nofieanggraeni.blogspot.com.tugas_modul4;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Mendapatkan referensi objek
        Button button = (Button) findViewById(R.id.btnRegist);
        // Menambahkan event handler ketika tombol diklik
        button.setOnClickListener(new View.OnClickListener(){
            @Override
            public void onClick(View v){
                // Menampilkan pesan peringatan pada layar
                Toast.makeText(getApplicationContext(),"Selamat Anda Berhasil Registrasi", Toast.LENGTH_LONG).show();
            }
        });
    }
}