如何在Android中处理来自Fragement的自定义方案？

public interface CustomHandler {
    void handleCustomData(String data);
}

public class MyFragment extends Fragment {
    private CustomHandler customHandler;

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof CustomHandler) {
            customHandler = (CustomHandler) context;
        } else {
            throw new RuntimeException(context.toString()
                    + " must implement CustomHandler");
        }
    }

    // 在适当的时机调用接口方法，传递自定义数据
    private void sendDataToActivity(String data) {
        customHandler.handleCustomData(data);
    }
}

public class MainActivity extends AppCompatActivity implements CustomHandler {
    // ...

    @Override
    public void handleCustomData(String data) {
        // 处理来自Fragment的自定义数据
        // ...
    }
}