概述
RecycleView分页加载封装，简单方便，功能齐全
详细
一、场景：
在项目开发中经常使用到列表集合，而目前RecycleView已经取代ListView，但是RecycleView目前没有分页功能，这就需要我们自己实现，一下是我封装分页功能的使用方法。
二、分页实现：
RecycleView分页主要测量列表滚动到底部，根据不同场景返回不同的viewHolder，每个viewHolder中有不同的itemLayout
(position) {
(position + == getItemCount()) {
() {
}
} {
}
}
返回不同的viewHolder
RecyclerView.ViewHolder (ViewGroup parentviewType) {
(viewType == ) {
View view = LayoutInflater.().inflate(R.layout.)view.setLayoutParams(LinearLayout.LayoutParams(LinearLayout.LayoutParams.ScreenUtils.()))FooterViewHolder(view)} (viewType == ) {
View view = LayoutInflater.().inflate(R.layout.)view.setLayoutParams(LinearLayout.LayoutParams(LinearLayout.LayoutParams.ScreenUtils.()))FailedViewHolder(view)} {
View view = LayoutInflater.().inflate()BaseViewHolder holder = BaseViewHolder(view)holder}
}
在判断列表滚动到底部的时候，判断后面还有没有更多数据，如果有，调用加载更多的接口回调，如果没有将isHasMore设置成false即可。
(RecyclerView recyclerViewnewState) {
.onScrollStateChanged(recyclerViewnewState)(newState == RecyclerView.&& ((+ ) == getItemCount())) {
.onLoad()}
}
(RecyclerView recyclerViewdxdy) {
.onScrolled(recyclerViewdxdy)= ((LinearLayoutManager) recyclerView.getLayoutManager()).findLastCompletelyVisibleItemPosition()}
三、使用分页：
1、见demo中的BaseAdapter、BaseBean、BaseViewHolder和listener、utils、widget包中代码赋值到你的项目中；
2、创建自己的bean类，继承BaseBean
public class MyBean extends BaseBean {
private String content;
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
}
3、创建自己的adapter，集成BaseAdapter并实现setViewHolder方法
public class MyAdapter extends BaseAdapter {
public MyAdapter(Context context, List<MyBean> list) {
super(context, list);
//设置项布局
setItemLayout(R.layout.layout_item);
}
@Override
public void setViewHolder(RecyclerView.ViewHolder holder, int position) {
if (holder instanceof BaseViewHolder) {
MyBean bean = (MyBean) list.get(position);
BaseViewHolder baseViewHolder = (BaseViewHolder) holder;
//获取项布局中控件设置内容
TextView tv = baseViewHolder.itemView.findViewById(R.id.tv_item);
tv.setText(bean.getContent());
} else if (holder instanceof FooterViewHolder) {
if (isHasMore) {
((FooterViewHolder) holder).getTvFooter().setText("正在加载中...");
((FooterViewHolder) holder).getProgressBar().setVisibility(View.VISIBLE);
} else {
((FooterViewHolder) holder).getTvFooter().setText("没有更多了");
((FooterViewHolder) holder).getProgressBar().setVisibility(View.GONE);
}
} else {
((FailedViewHolder) holder).getTvFailed().setText("网络异常");
}
}
}
4、调用分页
1）初始化RecycleView
recyclerView.setHasFixedSize(true);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
recyclerView.addItemDecoration(new MyItemDecoration(this, DividerItemDecoration.VERTICAL_LIST, true, 30));
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
2）、设置adapter
private void initData() {
for (int i = 0; i < 20; i++) {
MyBean bean = new MyBean();
bean.setContent("第" + i + "条内容");
list.add(bean);
}
adapter = new MyAdapter(this, list);
recyclerView.setAdapter(adapter);
adapter.setOnItemClickListener(onItemClickListener);
adapter.setView(recyclerView);
adapter.setOnLoadMoreListener(onLoadMoreListener);
}
OnLoadMoreListener = OnLoadMoreListener() {
() {
(!.isHasMore()) {
}
(i = * i < * + i++) {
MyBean bean = MyBean()bean.setContent(+ i + ).add(bean)}
= + (== ) {
.setHasMore()}
.notifyDataSetChanged()}
}
以上完成调用，没有使用其他第三方代码
下面是效果图
