分析

该项目最关健的地方在于缓存系统，架构图如下

缓存架构

基本思路

1.View层（比如fragment）中需要数据，然后请求presenter
2.presenter向Data Module请求数据
3.Data Module先判断本地缓存中有没有所需要的数据
4.如果本地缓存中有数据，则返回给presenter
5.如果本地缓存无数据，则请求网络下载，并通知presenter
6.presenter得到数据后控制View层显示数据

有个关键的地方，这里是有EventBus来进行Data Module和presenter的通信的

例子

1 HotFragment

public class HotFragment extends BaseFragment implements MvpView {
 @Override
    public void bind() {
        .....
    //向presenter请求数据  
    hotFragmentPresenter.getEventBusEvent(C.EventBusString.HOT_CACHE_ITEM_DOWNLOAD_SUCCESSFUL);


    }
}

2 HotFragmentPresenter

public class HotFragmentPresenter extends BasePresenter<HotFragment> {

  ....
    /**1 可以被view调用请求数据
     * 2 接收来自HttpManager端EventBus的通知，然后重新读取本地数据，通知RecyclerView更新数据
     */
    @Subscribe(threadMode = ThreadMode.MAIN, priority = 1)
    public void getEventBusEvent(Integer eventIndex) {
        switch (eventIndex) {
            case C.EventBusString.HOT_CACHE_ITEM_DOWNLOAD_SUCCESSFUL:
                Logger.e("ZhihuContentManager", "getEventBusEvent");
                //向本地缓存管理器请求数据
                hotModel = (HotModel) ZhihuContentManager.getInstance().getHotData(DateUtils.getBeforeDayTime(dateIndex));
                if (hotModel != null) {
                    Logger.e("ZhihuContentManager", "getEventBusEvent：" + hotModel.getRecent().get(0).getTitle());
                    //通知view（这里是HotFragment）更新view数据
                    getMvpView().notifyRecyvlerViewAdapter();

                } else {
                    Logger.e("ZhihuContentManager", "hotModel为空");
                }
                break;
        }
    }

....
}

3 ZhihuContentManager

public class ZhihuContentManager {
     private static final ZhihuContentManager mZhihuContentManager = new ZhihuContentManager();
     
     public Object getHotData(String date) {
        //首先读取缓存中的数据
        Object object = CacheAtFileManage.getObjectAtFile(C.CacheFileString.HOT_CACHE_FILE_NAME_DATE_IS + date);
        //如果不为空，则使用，为空，则重新访问网络下载到缓存
        if (object != null) {
            Logger.e("ZhihuContentManager", "object不为空");
            return object;
        } else {
            //请求网络
            HttpManager.getInstance().loadHotModel(date);
        }
        return null;
    }
}

4 HttpManager


    private static final HttpManager httpManager = new HttpManager();
    /**
     * 连接网络获取HotModel数据
     */
     public void loadHotModel(String date) {
        this.hotModelDate = date;
        NetWorkForRestApi.getZhihuApi()
                .loadHotModel()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(hotModelObserver);
    }

按顺序1234，注释很清楚了，34俩个Manager设计成static final的，利于访问

基于知乎日报API的NiDaily--（1）