Android RecyclerView上拉加载和下拉刷新

概述之前写过一篇刷新加载《RecyclerView上拉加载和下拉刷新（基础版）》，这次是进行改装完善。

之前写过一篇刷新加载《RecyclerView上拉加载和下拉刷新（基础版）》 ，这次是进行改装完善。

代码中注释的很详细，所以就直接上代码了。

核心实现

package com.example.fly.recyclervIEwrefresh.base;import androID.os.Bundle;import androID.support.annotation.Nullable;import androID.support.v4.Widget.SwipeRefreshLayout;import androID.support.v7.Widget.linearlayoutmanager;import androID.support.v7.Widget.RecyclerVIEw;import com.example.fly.recyclervIEwrefresh.R;import java.util.ArrayList;import java.util.List;/** * 类名： * 类描述：下拉刷新和上拉加载 * 创建人：fly * 创建日期： 2017/2/2. * 版本：V1.0 */public abstract class RefreshActivity<T extends Object,A extends RecyclerVIEw.Adapter> extends BaseActivity implements SwipeRefreshLayout.OnRefreshListener { protected SwipeRefreshLayout swipeRefreshLayout; protected RecyclerVIEw recyclerVIEw; protected linearlayoutmanager linearlayoutmanager; protected A adapter; protected List<T> Lists = new ArrayList<>(); protected T dataBeanLoadMore = createBean(); protected boolean isLoadDataIng; // 默认为false 是否正在加载数据， false 不在加载， true 正在加载 protected boolean isScrollY; // 是否在Y轴（垂直方向）上滑动， false 没滑动， true 滑动 @OverrIDe protected voID onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVIEw(setLayout()); swipeRefreshLayout = (SwipeRefreshLayout) findVIEwByID(R.ID.swipeRefreshLayout); swipeRefreshLayout.setonRefreshListener(this); swipeRefreshLayout.setcolorSchemeResources(Refresh.colors); // 设置变化的颜色 recyclerVIEw = (RecyclerVIEw) findVIEwByID(R.ID.recyclerVIEw); linearlayoutmanager = new linearlayoutmanager(this); recyclerVIEw.setLayoutManager(linearlayoutmanager); loadMore(); } /**作用就是能在父类中初始化公共的控件如上面的onCreate(@Nullable Bundle savedInstanceState)初始化的控件*/ protected abstract int setLayout(); public abstract T createBean();// public abstract A createAdapter(); /**上拉加载*/ protected voID loadMore() { recyclerVIEw.addOnScrollListener(new RecyclerVIEw.OnScrollListener() { /** * * @param recyclerVIEw 当前在滚动的RecyclerVIEw * @param newState 当前滚动状态 *  newState有三种值: //静止,没有滚动 public static final int SCRolL_STATE_IDLE = 0; //正在被外部拖拽,一般为用户正在用手指滚动 public static final int SCRolL_STATE_DRAGGING = 1; //自动滚动开始 public static final int SCRolL_STATE_SETTliNG = 2; */ @OverrIDe public voID onScrollStateChanged(RecyclerVIEw recyclerVIEw,int newState) { super.onScrollStateChanged(recyclerVIEw,newState); if (newState == RecyclerVIEw.SCRolL_STATE_IDLE && isLoadDataIng == false ) {  int lastVisibleItem = linearlayoutmanager.findLastCompletelyVisibleItemposition(); // 获取最后一个item的角标  int totalitemCount = linearlayoutmanager.getItemCount(); // 获取item的总数  if (lastVisibleItem == (totalitemCount - 1)) { // 判断滑到最后一个item  if (!swipeRefreshLayout.isRefreshing()) { //不再下拉刷新状态  if (isScrollY) { // 在Y轴（垂直方向）上有滑动  // Todo 执行上拉加载  onShowRefresh();  loadMoreData();  }  }  } } } /** * * @param recyclerVIEw 当前滚动的vIEw * @param dx 水平滚动距离 * @param dy 垂直滚动距离 */ @OverrIDe public voID onScrolled(RecyclerVIEw recyclerVIEw,int dx,int dy) { super.onScrolled(recyclerVIEw,dx,dy); if (dy > 0) {  isScrollY = true; }else{  isScrollY = false; } } }); } /**加载数据*/ public abstract voID loadMoreData(); /**显示加在更多的VIEw*/ protected voID onShowRefresh() { isLoadDataIng = true; // 正在加载数据 Lists.add(dataBeanLoadMore); adapter.notifyDataSetChanged(); } /**隐藏加在更多的VIEw*/ protected voID onHintLoadMore() { Lists.remove(dataBeanLoadMore); isLoadDataIng = false; // 不在加载数据 adapter.notifyDataSetChanged(); }}

package com.example.fly.recyclervIEwrefresh;import androID.os.Handler;import androID.os.Bundle;import com.example.fly.recyclervIEwrefresh.adapter.RecyclerAdapter;import com.example.fly.recyclervIEwrefresh.base.Refresh;import com.example.fly.recyclervIEwrefresh.base.RefreshActivity;import com.example.fly.recyclervIEwrefresh.bean.DataBean;/** * 类名： * 类描述：RecyclerVIEw刷新 方法二 * 创建人：fly * 创建日期： 2017/2/2. * 版本：V1.0 */public class MainActivity extends RefreshActivity<DataBean,RecyclerAdapter>{ @OverrIDe protected voID onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); for (int i = 0; i < 20; i++) { DataBean dataBean = new DataBean(Refresh.COMMON); dataBean.number = String.valueOf(i); Lists.add(dataBean); } adapter = new RecyclerAdapter(Lists,this); recyclerVIEw.setAdapter(adapter); } @OverrIDe public voID onRefresh() { new Handler().postDelayed(new Runnable() { @OverrIDe public voID run() { Lists.clear(); adapter.notifyDataSetChanged(); swipeRefreshLayout.setRefreshing(false); } },1000); } @OverrIDe protected int setLayout() {return R.layout.activity_main;} @OverrIDe public DataBean createBean() {return new DataBean(Refresh.LOAD_MORE);} @OverrIDe public voID loadMoreData() { for (int i = 0; i < 5; i++) { DataBean dataBean = new DataBean(Refresh.COMMON); dataBean.number = String.valueOf(i) + "fly"; Lists.add(dataBean); } adapter.notifyDataSetChanged(); onHintLoadMore(); }}

源码下载：RecyclerViewRefresh刷新加载

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