RecycyleView SwipeRefrshLayout 使用
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1.布局文件
<?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:orientation="vertical"> <!--下拉刷新控件--> <android.support.v4.widget.SwipeRefreshLayout android:id="@+id/swipe_refresh" android:layout_width="match_parent" android:layout_height="match_parent"> <android.support.v7.widget.RecyclerView android:id="@+id/recyclerview_list" android:layout_width="match_parent" android:layout_height="match_parent" /> </android.support.v4.widget.SwipeRefreshLayout></LinearLayout>
2.Adapter
package com.example.liyn.foryou.recylerview;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.LinearLayout;import android.widget.ProgressBar;import android.widget.TextView;import android.widget.Toast;import com.example.liyn.foryou.R;import java.util.List;import butterknife.BindView;import butterknife.ButterKnife;/** * Recylerview 适配器 * Created by liyn on 2017/3/16. */public class RecylerviewRefreshAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { Context mContext; LayoutInflater mInflater; List<String> mDatas; private static final int TYPE_ITEM = 0; private static final int TYPE_FOOTER = 1; //上拉加载更多 public static final int PULLUP_LOAD_MORE = 0; //正在加载中 public static final int LOADING_MORE = 1; //没有加载更多 隐藏 public static final int NO_LOAD_MORE = 2; //上拉加载更多状态-默认为0 private int mLoadMoreStatus = 0; public RecylerviewRefreshAdapter(Context context, List<String> datas) { mContext = context; mInflater = LayoutInflater.from(context); mDatas = datas; } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { if (viewType == TYPE_ITEM) { View itemView = mInflater.inflate(R.layout.recylerview_item, parent, false); return new ItemViewHolder(itemView); } else if (viewType == TYPE_FOOTER) { View itemView = mInflater.inflate(R.layout.load_more, parent, false); return new FooterViewHolder(itemView); } return null; } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { if (holder instanceof ItemViewHolder) { ItemViewHolder itemViewHolder = (ItemViewHolder) holder; String str = mDatas.get(position); itemViewHolder.mTvContent.setText(str); } else if (holder instanceof FooterViewHolder) { FooterViewHolder footerViewHolder = (FooterViewHolder) holder; switch (mLoadMoreStatus) { case PULLUP_LOAD_MORE: footerViewHolder.mTvLoadText.setText("上拉加载更多..."); break; case LOADING_MORE: footerViewHolder.mTvLoadText.setText("正加载更多..."); break; case NO_LOAD_MORE: //隐藏加载更多 footerViewHolder.mLoadLayout.setVisibility(View.GONE); break; } } } @Override public int getItemCount() { //RecyclerView的count设置为数据总条数+ 1(footerView) return mDatas.size() + 1; } @Override public int getItemViewType(int position) { if (position + 1 == getItemCount()) { //最后一个item设置为footerView return TYPE_FOOTER; } else { return TYPE_ITEM; } } public class ItemViewHolder extends RecyclerView.ViewHolder { @BindView(R.id.tv_text) TextView mTvContent; public ItemViewHolder(View itemView) { super(itemView); ButterKnife.bind(this, itemView); initListener(itemView); } private void initListener(View itemView) { itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(mContext, "poistion " + getAdapterPosition(), Toast.LENGTH_SHORT).show(); } }); } } public class FooterViewHolder extends RecyclerView.ViewHolder { @BindView(R.id.pbLoad) ProgressBar mPbLoad; @BindView(R.id.tvLoadText) TextView mTvLoadText; @BindView(R.id.loadLayout) LinearLayout mLoadLayout; public FooterViewHolder(View itemView) { super(itemView); ButterKnife.bind(this, itemView); } } /** * 更新加载更多状态 * * @param status */ public void changeMoreStatus(int status) { mLoadMoreStatus = status; notifyDataSetChanged(); } //刷新数据 public void refresh(List<String> list) { mDatas.clear(); mDatas.addAll(list); notifyDataSetChanged(); } //加载方法 public void loadmore(List<String> list) { mDatas.addAll(list); notifyDataSetChanged(); }}
3.Activity
package com.example.liyn.foryou.recylerview;import android.app.Activity;import android.os.Bundle;import android.os.Handler;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.liyn.foryou.R;import java.util.ArrayList;import java.util.List;import butterknife.BindView;import butterknife.ButterKnife;/** * Recyclerview 可以刷新 加载 使用 * Created by liyn on 2017/3/16. */public class RecyclerviewRefeshActivity extends Activity { @BindView(R.id.swipe_refresh) SwipeRefreshLayout swipeRefreshLayout;//刷新控件 @BindView(R.id.recyclerview_list) RecyclerView recyclerView;//RecyclerView 列表 RecylerviewRefreshAdapter adapter;//适配器 List<String> stringList;//数据 LinearLayoutManager linearLayoutManager;//布局管理器 @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_recylerview); ButterKnife.bind(this); initRecylerview(); initSwipeRefreshLayout(); } //初始化Recylerview void initRecylerview() { initData(); //设置布局管理器 linearLayoutManager = new LinearLayoutManager(this); //默认是垂直的 recyclerView.setLayoutManager(linearLayoutManager); adapter = new RecylerviewRefreshAdapter(this, stringList); //设置Adapter recyclerView.setAdapter(adapter); //RecyclerView滑动监听 recyclerView.setOnScrollListener(new RecyclerView.OnScrollListener() { int lastVisibleItem ; @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { super.onScrollStateChanged(recyclerView, newState); //判断RecyclerView的状态 是空闲时,同时,是最后一个可见的ITEM时才加载 if (newState == RecyclerView.SCROLL_STATE_IDLE && lastVisibleItem + 1 == adapter.getItemCount()) { //设置正在加载更多 adapter.changeMoreStatus(adapter.LOADING_MORE); new Handler().postDelayed(new Runnable() { @Override public void run() { List<String> newDatas = new ArrayList<>(); for (int i = 0; i < 5; i++) { int index = i + 1; newDatas.add("more item" + index); } adapter.loadmore(newDatas); //设置回到上拉加载更多 adapter.changeMoreStatus(adapter.PULLUP_LOAD_MORE); } }, 1000); } } @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); //最后一个可见的ITEM lastVisibleItem = linearLayoutManager.findLastVisibleItemPosition(); } }); } //初始化SwipeRefreshLayout void initSwipeRefreshLayout(){ swipeRefreshLayout.setColorSchemeResources(R.color.colorPrimary); swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { new Handler().postDelayed(new Runnable() { @Override public void run() { List<String> newDatas = new ArrayList<>(); for (int i = 0; i < 20; i++) { int index = i + 1; newDatas.add("refresh item" + index); } adapter.refresh(newDatas); swipeRefreshLayout.setRefreshing(false); } }, 1000); } }); } //添加数据 private void initData() { stringList = new ArrayList<>(); for (int i = 0; i < 40; i++) { stringList.add("item " + i); } }}
4.item 布局文件
(recylerview_item.xml )
<?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="wrap_content" android:orientation="vertical"> <TextView android:layout_width="match_parent" android:id="@+id/tv_text" android:gravity="center" android:text="我的世界" android:layout_height="30dp" /></LinearLayout>
5.加载布局
(load_more.xml)
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/loadLayout" android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:orientation="vertical" android:padding="10dp"> <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginBottom="5dip" android:layout_marginTop="5dip" android:gravity="center"> <ProgressBar android:id="@+id/pbLoad" android:layout_width="20dp" android:layout_height="20dp" android:layout_centerVertical="true" android:indeterminate="false" /> <TextView android:id="@+id/tvLoadText" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:layout_centerVertical="true" android:layout_marginLeft="4dip" android:layout_toRightOf="@id/pbLoad" android:clickable="true" android:text="魂牵梦萦 魂牵梦萦 " android:textColor="#000000" android:textSize="16sp" /> </RelativeLayout></LinearLayout>
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