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
