Manifest文件中的网络权限给了还是出现这样的问题

 D/HomePresenterImpl: result code is ---> 404
 I/HomePresenterImpl: 请求失败...

public class HomeFragment extends BaseFragment implements IHomeCallback {

    private IHomePresenter mHomePresenter;

    @Override
    protected int getRootViewResId() {
        return R.layout.fragment_home;
    }

    @Override
    protected void initPresenter() {
        //创建presenter
        mHomePresenter = new HomePresenterImpl();
        mHomePresenter.registerCallback(this);
    }

    @Override
    protected void loadData() {
        //加载数据
        mHomePresenter.getCategories();  //---------------这里会爆出空指针异常----------------
    }

    @Override
    public void onCategoriesLoded(Categories categories) {
        //加载的数据就会回到这里来
    }

    @Override
    protected void release() {
        //取消回调注册
        if (mHomePresenter !=null) {
            mHomePresenter.unregisterCallback(this);
        }
    }
}

空指针异常在将初始化放在定义成员变量时就解决了

这里和视频中不一样是为什么

emm 这很小白...