SwipeRefreshLayout结合RecyclerView实现下拉刷新和滑动加载更多

package com.izhuazhua.swiperecyclerviewmy; import android.graphics.Color; import android.os.Handler; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.util.Log; import android.view.View; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; /** * Created by andy on 2016/6/18. */ public class MainActivity extends AppCompatActivity { private String[] names = new String[] { "小虎", "小玉", "小清", "小李"}; private String[] descs = new String[] { "游戏高手", "一个具有音乐天赋的女孩,弹得一手好钢琴" , "C++女高手,十五年C++编程经验", "android开发牛人,微信客户端核心成员之一"}; private int[] imageIds = new int[] { R.drawable.tiger , R.drawable.nongyu , R.drawable.qingzhao , R.drawable.libai}; private List<Map<String, Object>> originalData = new ArrayList<>(); private RecyclerViewAdapter adapter = new RecyclerViewAdapter(this); SwipeRefreshLayout swipeRefreshLayout; private Handler handler = new Handler(); RecyclerView recyclerView; boolean isLoading; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Log.d("==MainActivity==", "setContentViewLog"); swipeRefreshLayout = (SwipeRefreshLayout) this.findViewById(R.id.SwipeRefreshLayout); swipeRefreshLayout.setColorSchemeColors(Color.BLUE, Color.RED, Color.YELLOW, Color.GREEN); swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { //下拉刷新是触发该回调函数。 @Override public void onRefresh() { Log.d("==MainActivity==", "onRefresh"); handler.postDelayed(new Runnable() { @Override public void run() { //添加刷新内容 Log.d("==MainActivity==", "handler.Onrefrshes"); addData(); swipeRefreshLayout.setRefreshing(false); } }, 2000); } }); final LinearLayoutManager layoutManager = new LinearLayoutManager(this); recyclerView = (RecyclerView) findViewById(R.id.recyclerView); recyclerView.setLayoutManager(layoutManager); recyclerView.setAdapter(adapter); recyclerView.setHasFixedSize(true); recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { super.onScrollStateChanged(recyclerView, newState); } @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { Log.d("==MainActivity==", "onScrolledStart"); super.onScrolled(recyclerView, dx, dy); int lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition(); int count = adapter.getItemCount(); //下面的判断比较列表项是否和可见列表最后一项一致，程序刚启动时，条件满足，自动加载，当加载到列表项多到一页展示不完时，停止自动加载 //当手指在屏幕上向上滑动时，该条件又满足，然后就加载更多了 if (lastVisibleItemPosition + 1 == count ) { Log.d("==MainActivity==", "loading excute"); boolean isRefreshing = swipeRefreshLayout.isRefreshing(); if (isRefreshing) { return; } if (!isLoading) { isLoading = true; handler.postDelayed(new Runnable() { @Override public void run() { isLoading = false; Log.d("==MainActivity==", "load data complete"); int count = adapter.getItemCount(); //加载更多数据 addData(); int count1 = adapter.getItemCount(); swipeRefreshLayout.setRefreshing(false); } }, 2000); } }//*/ } }); setClickListener(); addData(); } public void setClickListener() { adapter.setOnItemClickListener(new RecyclerViewAdapter.OnItemClickListener() { @Override public void onItemClicked(View view, int positon) { } @Override public void onItemLongClicked(View view, int position) { } }); } private void createOriginalData() { for (int i = 0; i < names.length; i++) { Map<String, Object> listItem = new HashMap<String, Object>(); listItem.put("header", imageIds[i]); listItem.put("personName", names[i]); listItem.put("desc", descs[i]); originalData.add(listItem); } } public void addData() { Log.d("=MainActivity=", "addData data size:" + originalData.size()); if(originalData.size()<1) { createOriginalData(); } adapter.addData(originalData); } }