Android pull refresh and load more helper.
一个android下拉刷新和上拉加载的框架。
使用方式：
The layout xml with SwipeRefreshLayout and RecyclerView
布局文件里使用普通的SwipeRefreshLayout和RecyclerView即可
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/refresh"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
Set data loader and data swapper into loadMoreHelper, and start to pull data
设置数据加载及数据填充方式，并开始下拉刷新
final MyAdapter2 adapter = new MyAdapter2();
loadHelper = LoadHelper.create(swipeRefreshLayout)
.setDataSwapper(adapter)
.setAsyncLoader((page, lastPageData) -> doLoadData(page))
.startPullData(true);
======
说明
RecyclerView.Adapter could implements the interface IDataSwapper
Adapter 可以 继承IDataSwapper ，也可以单独实现
public interface IDataSwapper {
/**
* Swap all datas
*/
void swapData(List list);
/**
* Append data to the end of current list
*/
void appendData(List list);
}
private class MyAdapter2 extends RecyclerView.Adapter implements IDataSwapper
AsyncLoader return the PageData inculde data list, pagemore, load result success or false. Call LoadHelper.onLoadEnd to pass the load result data.
数据加载接口返回PageData 数据，主要包含数据List, 是否有更多pageMore,以及当前加载是否成功. 数据加载完毕时调用LoadHelper.onLoadEnd传入数据加载结果
public final class PageData<DT> {
private boolean success = true;
private List<DT> data;
private boolean pageMore;
private int pageIndex;
AsyncLoader implements without lambda
AsyncLoader 使用非lambda表达式实现
.setAsyncLoader(new LoadMoreHelper.AsyncDataLoader<Item>() {
@Override
public void startLoadData(int pageIndex, PageData<Item> lastPageData) {
DataLoader.loadData(pageIndex, null)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(result -> {
PageData<Item> pageData = PageData.createSuccess(pageIndex, result.getData(), result.isPageMore());
loadHelper.onLoadEnd(pageData);
}, e -> {
PageData<Item> pageData = PageData.createFailed(pageIndex);
loadHelper.onLoadEnd(pageData);
});
}
})