如何在android中获取object中字段的值

public class MainActivity extends AppCompatActivity {
    private String name = "John";
    private int age = 25;

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

        try {
            Class<?> clazz = this.getClass();
            Field nameField = clazz.getDeclaredField("name");
            Field ageField = clazz.getDeclaredField("age");

            nameField.setAccessible(true);
            ageField.setAccessible(true);

            String nameValue = (String) nameField.get(this);
            int ageValue = (int) ageField.get(this);

            Log.d("MainActivity", "Name: " + nameValue);
            Log.d("MainActivity", "Age: " + ageValue);
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
}