未调用OnClickListener for Button

Question

我正在使用RetroFit 2.1.0将设备对象发布到我的MongoDB数据库：

public class Device extends Fragment {
    EditText deviceName;
    EditText numDevices;
    Button submitButton;
    private API api;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        final View rootView = inflater.inflate(R.layout.master_view, container, false);

        deviceName = (EditText) rootView.findViewById(R.id.device_name);
        numDevices = (EditText)
                rootView.findViewById(R.num_devices);
        submitButton = (Button) rootView.findViewById(R.id.submit_button);

        Retrofit retroFit = new Retrofit.Builder()
                .baseUrl(getString(R.string.base_url))
                .addConverterFactory(GsonConverterFactory.create())
                .build();

        api = retroFit.create(API.class);

        submitButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                saveDevice();
            }
        });

        return rootView;
    }

    public void saveDevice() {
        //THIS LINE OF CODE IS NOT RUNNING NOT SURE WHY?
        System.out.println("GOT INTO SAVE MASTER");
        DeviceModel device = new DeviceModel();
        device.setDeviceName(deviceName.getText().toString());
        device.numOfDevices(Integer.parseInt(numDevices.getText().toString()));

        Call<DeviceModel> deviceModel = api.createDevice(device);

        deviceModel.enqueue(new Callback<DeviceModel>() {
            @Override
            public void onResponse(Call<DeviceModel> call, Response<DeviceModel> response) {
                System.out.print("Success" + response.code());
            }

            @Override
            public void onFailure(Call<DeviceModel> call, Throwable t) {
                System.out.print(t.getLocalizedMessage());
            }
        });
    }
}

这是我的API.java：

public interface API {
    //Device endpoint
    @POST("device/insert")
    Call<DeviceModel> createDevice(@Body DeviceModel master);
}

我使用RetroFit 2.1.0将设备对象保存到http://localhost:3000上运行的MongoDB实例。当我在邮递员上点击端点http://localhost:3000/device/insert时，它会将设备JSON对象保存到数据库。

但是当我使用RetroFit通过应用程序执行此操作时，它似乎根本不起作用。我在saveDevice方法中做错了吗？