How to integrate a Presenter to an empty Activity?

I am implementing a Presenter at a Activity empty, that is, my Activity_main is completely empty without any element or widget, it asks me: How do I integrate this Presenter in my Activity so that I throw a JSON in that Activity empty using a menu:

  @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            return super.onCreateOptionsMenu(menu);
            setContentView(R.layout.activity_main2);

this is my GetDetentionActivity code

 public class GetDetentionActivity extends BaseActivity implements GetDetentionPresenter.Callback {


    private GetDetentionPresenter getmGetDetentionPresenter;
    private static final String EXTRA_FIRST = "extraFirst";

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        return super.onCreateOptionsMenu(menu);
        setContentView(R.layout.activity_main2);


        public static void launch (AppCompatActivity GetDetentionActivity,boolean first){
            Intent intent = new Intent(GetDetentionActivity, MainActivity.class);
            intent.putExtra(EXTRA_FIRST, first);
            GetDetentionActivity.startActivity(intent);

        }


    }

    @Override
    protected BasePresenter getPresenter() {
        return getmGetDetentionPresenter = new GetDetentionPresenter(this, this) {
            @Override
            protected void implementWS() {

            }
        };
    }

    @Override
    public void onSuccessGetDetention(List<GetDetentionResponse.Motive> detentionList) {

    }

}

My presenter GetDetentionPresenter

public  class GetDetentionPresenter extends BaseDemoPresenter implements WSCallback  {

public static String result;
/// Callback
public Callback mCallback;

public interface Callback {
    void onSuccessGetDetention(List<GetDetentionResponse.Motive> detentionList);
}

public GetDetentionPresenter(AppCompatActivity appCompatActivity) {
    super(appCompatActivity);
}

@Override
protected void implementWS() {

}

public GetDetentionPresenter(AppCompatActivity appCompatActivity, GetDetentionActivity callback) {
    super(appCompatActivity);
    mCallback = callback;
}



public void getDetention() {
    mWSManager.requestWs(GetDetentionResponse.class, WSManager.WS.GET_DETENTION,
            WebServices.services().getDetention(new GetDetentionRequest("1")));
}

private void onSuccessLoadGetDetention(String requestUrl, GetDetentionResponse getDetentionResponse) {
    if (getDetentionResponse.result.equals("0")) {
        mCallback.onSuccessGetDetention(getDetentionResponse.groundsList);
    } else {
        onErrorLoadResponse(requestUrl, getDetentionResponse.resultDescription != null
                ? getDetentionResponse.resultDescription : "");
    }
}

@Override
public void onRequestWS(String requestUrl) {
    if (requestUrl.equals(WSManager.WS.GET_DETENTION)) {
        MessageUtils.progress(mAppCompatActivity, "Cargando motivos de detencion...");
    } else {
        MessageUtils.toast(mAppCompatActivity, "Cargando...");
    }
}

@Override
public void onSuccessLoadResponse(String requestUrl, WSBaseResponseInterface baseResponse) {
    MessageUtils.stopProgress();
    if (requestUrl.equals(WSManager.WS.GET_DETENTION)) {
        onSuccessLoadGetDetention(requestUrl, (GetDetentionResponse) baseResponse);
    }
}
@Override
public void onErrorLoadResponse(String requestUrl, String messageError) {
    MessageUtils.stopProgress();
    if (messageError.isEmpty()) {
        MessageUtils.toast(mAppCompatActivity, "Fallo");
    } else {
        MessageUtils.toast(mAppCompatActivity, messageError);
    }
}
@Override
public void onErrorConnection() {
    MessageUtils.toast(mAppCompatActivity, "Sin internet");
}

}