RecyclerView多个item布局的写法（头布局+脚布局）

上图

github

下载源码

Initial commit第一次提交的代码，为本文内容

以下的为主要代码，看注释即可，比较简单

MainActivity

含上拉加载更多

package com.anew.recyclerviewall;import android.os.Bundle;import android.os.Handler;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.DefaultItemAnimator;import android.support.v7.widget.DividerItemDecoration;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.support.v7.widget.Toolbar;import android.util.Log;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity { private RecyclerView mRecyclerView; private List<String> mHeadList; private List<String> mBodyList; private List<String> mFootList; private MyAdapter mAdapter; private LinearLayoutManager mLayoutManager; Handler mHandler = new Handler(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); mHeadList = new ArrayList<>(); for (int i = 0; i < 1; i++) { mHeadList.add("head" + i); } mBodyList = new ArrayList<>(); for (int i = 'A'; i < 'L'; i++) { mBodyList.add("" + (char) i); } mFootList = new ArrayList<>(); for (int i = 0; i < 1; i++) { mFootList.add("foot" + i); } mRecyclerView = (RecyclerView) findViewById(R.id.rv);// 使用默认的api绘制分割线 mRecyclerView.addItemDecoration (new DividerItemDecoration(this, DividerItemDecoration.HORIZONTAL));// 设置增加删除item的动画效果 mRecyclerView.setItemAnimator(new DefaultItemAnimator());// 瀑布流// mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(4,StaggeredGridLayoutManager.VERTICAL)); mLayoutManager = new LinearLayoutManager(this); mRecyclerView.setLayoutManager(mLayoutManager); mAdapter = new MyAdapter(this, mHeadList, mBodyList, mFootList); mRecyclerView.setAdapter(mAdapter); // 当目前的可见条目是所有数据的最后一个时，开始加载新的数据 mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); int lastCompletelyVisibleItemPosition = mLayoutManager.findLastCompletelyVisibleItemPosition(); if (lastCompletelyVisibleItemPosition + 1 == mAdapter.getItemCount()) { mHandler.postDelayed(new Runnable() { @Override public void run() { List<String> mMoreList = new ArrayList<>(); for (int i = 0; i < 3; i++) { mMoreList.add("more" + i); } mBodyList.addAll(mMoreList); mAdapter.notifyItemInserted(mAdapter.getItemCount() - 2); } }, 1500); Log.e("qqq", "到底了" + lastCompletelyVisibleItemPosition); } int firstCompletelyVisibleItemPosition = mLayoutManager.findFirstCompletelyVisibleItemPosition(); if (firstCompletelyVisibleItemPosition == 0&&dy<0) { Log.e("eeeee", "开始刷新呀呀呀"); } } }); }}

MyAdapter

对外部：头布局list、身体布局list、脚布局list，所有的list单独计数

内部：对position进行调整，这里需要耐心调整position

package com.anew.recyclerviewall;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 android.widget.Toast;import java.util.List;/** * Created by a on 2017/1/7. */public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { private Context context; private List<String> mHeadList; private List<String> mBodyList; private List<String> mFootList; private static final int HEAD_TYPE = 1; private static final int BODY_TYPE = 2; private static final int FOOT_TYPE = 3; public MyAdapter(Context context, List<String> headList, List<String> bodyList, List<String> footList) { this.context = context; this.mHeadList = headList; this.mBodyList = bodyList; this.mFootList = footList; } // ★ 1. 定义规则，什么情况，是哪一种ViewType @Override public int getItemViewType(int position) { int viewType = -1; if (position < getHeadCount()) { viewType = HEAD_TYPE; } else if (position > getHeadCount() + getBodyCount() - 1) { //这里最后要减去1，慢慢地去数 viewType = FOOT_TYPE; } else { viewType = BODY_TYPE; } return viewType; } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { LayoutInflater inflater = LayoutInflater.from(context); View view = null; // ★ 2. 根据viewType来确定加载那个布局，返回哪一个ViewHolder switch (viewType) { case HEAD_TYPE: view = inflater.inflate(R.layout.item_head, parent, false); return new HeadHolder(view); case BODY_TYPE: view = inflater.inflate(R.layout.item_body, parent, false); return new BodyHolder(view); case FOOT_TYPE: view = inflater.inflate(R.layout.item_foot, parent, false); return new FootHolder(view); } return null; } @Override public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {// ★ 3. 根据holder是哪一个ViewHolder的实例，来确定操作哪一个布局的UI if (holder instanceof HeadHolder) { HeadHolder headHolder = (HeadHolder) holder; headHolder.mTvHead.setText(mHeadList.get(position) + ""); headHolder.mTvHead.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { addData(); } }); } if (holder instanceof BodyHolder) { final BodyHolder bodyHolder = (BodyHolder) holder; bodyHolder.mTvBody.setText(mBodyList.get(position - getHeadCount()) + ""); bodyHolder.mTvBody.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { removeData(bodyHolder.getAdapterPosition()); } }); } if (holder instanceof FootHolder) { final FootHolder footHolder = (FootHolder) holder; footHolder.mTvFoot.setText(mFootList.get(position - getHeadCount() - getBodyCount()) + ""); footHolder.mTvFoot.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(context, footHolder.getAdapterPosition() + "", Toast.LENGTH_SHORT).show(); } }); } } @Override public int getItemCount() { return getHeadCount() + getBodyCount() + getFootCount(); } private int getFootCount() { return mFootList.size(); } private int getBodyCount() { return mBodyList.size(); } private int getHeadCount() { return mHeadList.size(); } public void addData(int position) { mBodyList.add(position, "Insert One");// ★★★★ 使用notifyItemInserted去更新数据，否则没有动画效果 notifyItemInserted(position); } /** * 增加bodyList条目 */ public void addData() { mBodyList.add("1"); mBodyList.add("2"); mBodyList.add("3");// ★★★★ 使用notifyItemInserted去更新数据，否则没有动画效果 notifyItemRangeInserted(0, 3); } /** * 删除bodyList条目 */ public void removeData(int position) {// 经测试疯狂点击删除条目，会产生负数，导致越界异常 if (!(position - getHeadCount() < 0)) {// ★★★★ 防止角标越界异常，要减去头布局数量，总之去数数吧 mBodyList.remove(position - getHeadCount()); notifyItemRemoved(position); } } /** * 头布局Holder */ static class HeadHolder extends RecyclerView.ViewHolder { private TextView mTvHead; public HeadHolder(View itemView) { super(itemView); mTvHead = (TextView) itemView.findViewById(R.id.tv_head); } } /** * 身体布局Holder */ static class BodyHolder extends RecyclerView.ViewHolder { private TextView mTvBody; public BodyHolder(View itemView) { super(itemView); mTvBody = (TextView) itemView.findViewById(R.id.tv_body); } } /** * 脚布局Holder */ static class FootHolder extends RecyclerView.ViewHolder { private TextView mTvFoot; public FootHolder(View itemView) { super(itemView); mTvFoot = (TextView) itemView.findViewById(R.id.tv_foot); } }}

item_body

item_head和item_foot类似就不粘贴了

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/ll" android:layout_width="match_parent" android:layout_height="40dp" android:layout_marginRight="11px" android:layout_marginBottom="11px" android:background="@color/colorPrimary" android:orientation="vertical"> <TextView android:id="@+id/tv_body" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:textSize="17sp" android:layout_gravity="center" android:text="Hello World!"/></LinearLayout>

以上所述是小编给大家介绍的Android 中RecyclerView多种item布局的写法（头布局+脚布局），希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！