1. Create Option menu 2. Create Menu Item test_menu.xml MainActivity.java onCreate OptionsMenu method 생성 ( 직접 작성해도 됨 ) ackage com.example.project7_optionmenu; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.Menu; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedI..