Swiperefreshlayout与Recyclerview下拉刷新和上拉加载
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布局文件
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main2" android:layout_width="match_parent" android:layout_height="match_parent" > <android.support.v4.widget.SwipeRefreshLayout android:id="@+id/SwipeRefreshLayout" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.v7.widget.RecyclerView android:id="@+id/recyclerView" android:layout_width="match_parent" android:layout_height="match_parent"> </android.support.v7.widget.RecyclerView> </android.support.v4.widget.SwipeRefreshLayout></RelativeLayout>MainActivity代码
package com.example.putorefresh;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 android.widget.Toast;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;public class Main2Activity extends AppCompatActivity { boolean isLoading; private List<Map<String, Object>> data = new ArrayList<>(); private MyAdapter adapter = new MyAdapter(this, data); private Handler handler = new Handler(); private SwipeRefreshLayout swipeRefreshLayout; private RecyclerView recyclerView; private int index; private int lastVisibleItemPosition; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); initView(); initData(); } private void initView() { swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.SwipeRefreshLayout); recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
//这里设置刷新控件的样式颜色
swipeRefreshLayout.setColorSchemeResources(R.color.blueStatus);
//设置第一次进入界面显示刷新控件 swipeRefreshLayout.post(new Runnable() { @Override public void run() { swipeRefreshLayout.setRefreshing(true); } });//设置下拉刷新监听 swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() {
//模拟请求网络 handler.postDelayed(new Runnable() { @Override public void run() { data.clear(); index=0; getData(); } }, 2000); } }); final LinearLayoutManager layoutManager = new LinearLayoutManager(this); recyclerView.setLayoutManager(layoutManager); recyclerView.setAdapter(adapter);
//设置滑动监听 recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
//滑动状态监听 @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { super.onScrollStateChanged(recyclerView, newState); Log.d("test", "StateChanged = " + newState); if (newState == RecyclerView.SCROLL_STATE_IDLE && lastVisibleItemPosition + 1 == adapter.getItemCount()) { Log.d("test", "loading executed"); boolean isRefreshing = swipeRefreshLayout.isRefreshing(); if (isRefreshing) { adapter.notifyItemRemoved(adapter.getItemCount()); return; } if (!isLoading) { isLoading = true; handler.postDelayed(new Runnable() { @Override public void run() { isLoading = false; getData(); Log.d("test", "load more completed"); } }, 1000); }else{ adapter.notifyItemRemoved(adapter.getItemCount()); return; } } }//滑动监听 @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); Log.d("test", "onScrolled");//最后可见的item的位置(0,1....adapter.getCount()-1) lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition(); /*if (lastVisibleItemPosition + 1 == adapter.getItemCount()) { Log.d("test", "loading executed"); boolean isRefreshing = swipeRefreshLayout.isRefreshing(); if (isRefreshing) { adapter.notifyItemRemoved(adapter.getItemCount()); return; } if (!isLoading) { isLoading = true; handler.postDelayed(new Runnable() { @Override public void run() { getData(); Log.d("test", "load more completed"); isLoading = false; } }, 1000); } }*/ } }); //添加点击事件 adapter.setOnItemClickListener(new MyAdapter.OnItemClickListener() { @Override public void onItemClick(View view, int position) { Log.d("test", "item position = " + position); } @Override public void onItemLongClick(View view, int position) { } }); } public void initData() { handler.postDelayed(new Runnable() { @Override public void run() { getData(); } }, 1500); } /** * 获取测试数据 */ private void getData() { index++; if(index>3){ Toast.makeText(Main2Activity.this,"没有更多数据!",Toast.LENGTH_SHORT).show();// adapter.notifyDataSetChanged();// recyclerView.smoothScrollToPosition(adapter.getItemCount()); swipeRefreshLayout.setRefreshing(false); adapter.notifyItemRemoved(adapter.getItemCount()); isLoading = true; return; }else{ for (int i = 0; i < 6; i++) { Map<String, Object> map = new HashMap<>(); data.add(map); } } adapter.notifyDataSetChanged(); swipeRefreshLayout.setRefreshing(false); adapter.notifyItemRemoved(adapter.getItemCount()); }}
Adapter代码
package com.example.putorefresh;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import java.util.List;/** * Created by Dell on 2017/2/8. */public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { private static final int TYPE_ITEM = 0; private static final int TYPE_FOOTER = 1; private Context context; private List data; public interface OnItemClickListener { void onItemClick(View view, int position); void onItemLongClick(View view, int position); } private OnItemClickListener onItemClickListener; public void setOnItemClickListener(OnItemClickListener onItemClickListener) { this.onItemClickListener = onItemClickListener; } @Override public int getItemCount() { return data.size() == 0 ? 0 : data.size() + 1; } @Override public int getItemViewType(int position) { if (position + 1 == getItemCount()) { return TYPE_FOOTER; } else { return TYPE_ITEM; } } public MyAdapter(Context context, List data) { this.context = context; this.data = data; } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { if (viewType == TYPE_ITEM) { View view = LayoutInflater.from(context).inflate(R.layout.item_notice, parent, false); return new ItemViewHolder(view); } else if (viewType == TYPE_FOOTER) { View view = LayoutInflater.from(context).inflate(R.layout.item_foot, parent, false); return new FootViewHolder(view); } return null; } @Override public void onBindViewHolder(final RecyclerView.ViewHolder holder, int position) { if (holder instanceof ItemViewHolder) { //holder.tv.setText(data.get(position)); if (onItemClickListener != null) { holder.itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { int position = holder.getLayoutPosition(); onItemClickListener.onItemClick(holder.itemView, position); } }); holder.itemView.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { int position = holder.getLayoutPosition(); onItemClickListener.onItemLongClick(holder.itemView, position); return false; } }); } } } static class ItemViewHolder extends RecyclerView.ViewHolder { TextView tv; public ItemViewHolder(View view) { super(view); tv = (TextView) view.findViewById(R.id.tv_date); } } static class FootViewHolder extends RecyclerView.ViewHolder { public FootViewHolder(View view) { super(view); } }}脚布局
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="40dp" android:gravity="center" android:orientation="horizontal" > <ProgressBar android:layout_marginRight="6dp" android:id="@+id/progressBar" style="?android:attr/progressBarStyleSmall" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:text="加载中" /></LinearLayout>
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