RecyclerView

xiaoxiao2021-02-28 93

那么有了ListView、GridView为什么还需要RecyclerView这样的控件呢？整体上看RecyclerView架构，提供了一种插拔式的体验，高度的解耦，异常的灵活，通过设置它提供的不同LayoutManager，ItemDecoration , ItemAnimator实现令人瞠目的效果。

你想要控制其显示的方式，请通过布局管理器LayoutManager你想要控制Item间的间隔（可绘制），请通过ItemDecoration你想要控制Item增删的动画，请通过ItemAnimator你想要控制点击、长按事件，请自己写（擦，这点尼玛。）鉴于我们对于ListView的使用特别的熟悉，对比下RecyclerView的使用代码：

code中需要

//设置布局管理器，必须 mRecyclerView.setLayoutManager(layout); //设置RecycleView的Adapter，必须 mRecyclerView.setAdapter(adapter) //设置分割线，非必须 mRecyclerView.addItemDecoration(ItemDecoration); //设置item的增删动画，非必须 mRecyclerView.setItemAnimator(animator);

现在先最简单创建一个列表

新建Item的布局recycleview_item，以TextView为根节点

新建一个RecyclerView.Adapter适配器TestRecycleViewAdapter

public class TestRecycleViewAdapter extends RecyclerView.Adapter<TestRecycleViewAdapter.ViewHolderA> { private Context mContext; private List<String> mList; public TestRecycleViewAdapter(Context context, List<String> list) { mContext = context; mList = list; } @Override public ViewHolderA onCreateViewHolder(ViewGroup parent, int viewType) { //此处动态加载ViewHolder的布局文件并返回holder View view = LayoutInflater.from(mContext).inflate(R.layout.recycleview_item, parent, false); ViewHolderA holderA = new ViewHolderA(view); return holderA; } @Override public void onBindViewHolder(ViewHolderA holder, int position) { //此处设置Item中view的数据 holder.mTextView.setText(mList.get(position)); } @Override public int getItemCount() { //生成的item的数量 return mList.size(); } //Item的ViewHolder以及item内部布局控件的id绑定 class ViewHolderA extends RecyclerView.ViewHolder{ TextView mTextView; public ViewHolderA(View itemView) { super(itemView); mTextView = (TextView) itemView.findViewById(R.id.recycle_textview); } } }

用Android Studio生成Adapter结构技巧

先新建一个类TestRecycleViewAdapter继承自RecyclerView.Adapter<这里填ViewHolder名字的>，现在出现红线，先不管它然后在TestRecycleViewAdapter 内部写内部类ViewHolderA 继承自 RecyclerView.ViewHolder，这个时候会自动生成构造函数接着将ViewHolder的名字ViewHolderA填入第2步粗体处，注意这里是内部类所以正确填入是TestRecycleViewAdapter.ViewHolderA接着点红线，然后IDE会自己生成所需的3个方法

Activity中代码是这样

public class MainActivity extends AppCompatActivity { private List<String> list; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); RecyclerView mRecyclerView = (RecyclerView) findViewById(R.id.activity_main_recycle_view); mRecyclerView.setLayoutManager(new LinearLayoutManager(this)); initData(); //实例化并传输数据给adapter TestRecycleViewAdapter adapter = new TestRecycleViewAdapter(getApplicationContext(), list); mRecyclerView.setAdapter(adapter); } /** * 添加数据 * */ private void initData() { list = new ArrayList<>(); for (int i = 0; i < 50; i++) { list.add("item" + i); } } }

这样子一个最基本的RecycleView就写好了，效果图

最基本的RecycleView

可以看到默认没有Scrollbars，没有item之间的间隔线，没有item点击效果，实际上这些我们需要自定义（虽然有点麻烦）

ItemDecoration

该方法的参数为RecyclerView.ItemDecoration，该类为抽象类，官方目前并没有提供默认的实现类

该类的源码：

public static abstract class ItemDecoration { public void onDraw(Canvas c, RecyclerView parent, State state) { onDraw(c, parent); } public void onDrawOver(Canvas c, RecyclerView parent, State state) { onDrawOver(c, parent); } public void getItemOffsets(Rect outRect, View view, RecyclerView parent, State state) { getItemOffsets(outRect, ((LayoutParams) view.getLayoutParams()).getViewLayoutPosition(), parent); } @Deprecated public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) { outRect.set(0, 0, 0, 0); } 123456789101112131415161718192021 123456789101112131415161718192021

当我们调用mRecyclerView.addItemDecoration()方法添加decoration的时候，RecyclerView在绘制的时候，去会绘制decorator，即调用该类的onDraw和onDrawOver方法，

onDraw方法先于drawChildrenonDrawOver在drawChildren之后，一般我们选择复写其中一个即可。getItemOffsets 可以通过outRect.set()为每个Item设置一定的偏移量，主要用于绘制Decorator。

该类参考自：DividerItemDecoration

package com.zhy.sample.demo_recyclerview; /* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * limitations under the License. */ import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.support.v7.widget.LinearLayoutManager; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.RecyclerView.State; import android.util.Log; import android.view.View; /** * This class is from the v7 samples of the Android SDK. It's not by me! * <p/> * See the license above for details. */ public class DividerItemDecoration extends RecyclerView.ItemDecoration { private static final int[] ATTRS = new int[]{ android.R.attr.listDivider }; public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL; public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL; private Drawable mDivider; private int mOrientation; public DividerItemDecoration(Context context, int orientation) { final TypedArray a = context.obtainStyledAttributes(ATTRS); mDivider = a.getDrawable(0); a.recycle(); setOrientation(orientation); } public void setOrientation(int orientation) { if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) { throw new IllegalArgumentException("invalid orientation"); } mOrientation = orientation; } @Override public void onDraw(Canvas c, RecyclerView parent) { Log.v("recyclerview - itemdecoration", "onDraw()"); if (mOrientation == VERTICAL_LIST) { drawVertical(c, parent); } else { drawHorizontal(c, parent); } } public void drawVertical(Canvas c, RecyclerView parent) { final int left = parent.getPaddingLeft(); final int right = parent.getWidth() - parent.getPaddingRight(); final int childCount = parent.getChildCount(); for (int i = 0; i < childCount; i++) { final View child = parent.getChildAt(i); android.support.v7.widget.RecyclerView v = new android.support.v7.widget.RecyclerView(parent.getContext()); final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child .getLayoutParams(); final int top = child.getBottom() + params.bottomMargin; final int bottom = top + mDivider.getIntrinsicHeight(); mDivider.setBounds(left, top, right, bottom); mDivider.draw(c); } } public void drawHorizontal(Canvas c, RecyclerView parent) { final int top = parent.getPaddingTop(); final int bottom = parent.getHeight() - parent.getPaddingBottom(); final int childCount = parent.getChildCount(); for (int i = 0; i < childCount; i++) { final View child = parent.getChildAt(i); final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child .getLayoutParams(); final int left = child.getRight() + params.rightMargin; final int right = left + mDivider.getIntrinsicHeight(); mDivider.setBounds(left, top, right, bottom); mDivider.draw(c); } } @Override public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) { if (mOrientation == VERTICAL_LIST) { outRect.set(0, 0, 0, mDivider.getIntrinsicHeight()); } else { outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0); } } } 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110

所以，自定义间隔线步骤如下：

在Style文件里加上name="android:listDivider"的item

<item name="android:listDivider">@drawable/divider_backgroud</item>

书写divider_bg.xml文件，shape文件为渐变xml

这样一个自定义间隔线样式就好了

LayoutManager

好了，上面实现了类似ListView样子的Demo，通过使用其默认的LinearLayoutManager。

RecyclerView.LayoutManager吧，这是一个抽象类，好在系统提供了3个实现类：

LinearLayoutManager 现行管理器，支持横向、纵向。GridLayoutManager 网格布局管理器StaggeredGridLayoutManager 瀑布就式布局管理器

我们尝试去实现类似GridView，秒秒钟的事情：

//mRecyclerView.setLayoutManager(new LinearLayoutManager(this)); mRecyclerView.setLayoutManager(new GridLayoutManager(this,4)); 12 12

只需要修改LayoutManager即可，还是很nice的。

瀑布流式的布局，其实他可以实现GridLayoutManager一样的功能，仅仅按照下列代码：

// mRecyclerView.setLayoutManager(new GridLayoutManager(this,4)); mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(4,StaggeredGridLayoutManager.VERTICAL)); 12 12

这两种写法显示的效果是一致的，但是注意StaggeredGridLayoutManager构造的第二个参数传一个orientation，如果传入的是StaggeredGridLayoutManager.VERTICAL代表有多少列；那么传入的如果是StaggeredGridLayoutManager.HORIZONTAL就代表有多少行，比如本例如果改为：

mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(4, StaggeredGridLayoutManager.HORIZONTAL)); 12 12

那么效果为：

感觉上和网格布局没啥差别，因为这上面的item我们使用了固定的高度，我们可以在适配器的onBindViewHolder方法中随机设置item高度

先在adapter的里声明 private List<Integer> mHeight; 在构造方法里随机生成高度值 mHeight = new ArrayList<Integer>(); for (int i = 0; i < mList.size(); i++) { mHeight.add((int) (80 + Math.random() * 300)); } 接着在onBindViewHolder方法里 ViewGroup.LayoutParams lp = holder.mTextView.getLayoutParams(); lp.height = mHeight.get(position); 瀑布流

ItemAnimator

ItemAnimator也是一个抽象类，好在系统为我们提供了一种默认的实现类，期待系统多添加些默认的实现。

借助默认的实现，当Item添加和移除的时候，添加动画效果很简单:

// 设置item动画 mRecyclerView.setItemAnimator(new DefaultItemAnimator()); 12 12

系统为我们提供了一个默认的实现，我们为我们的瀑布流添加以上一行代码，效果为：

注意，这里更新数据集不是用adapter.notifyDataSetChanged()而是 notifyItemInserted(position)与notifyItemRemoved(position) 否则没有动画效果。上述为adapter中添加了两个方法：

public void addData(int position) { mDatas.add(position, "Insert One"); notifyItemInserted(position); } public void removeData(int position) { mDatas.remove(position); notifyItemRemoved(position); } 123456789 123456789

Activity中点击MenuItem触发：

@Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.id_action_add: mAdapter.addData(1); break; case R.id.id_action_delete: mAdapter.removeData(1); break; } return true; } 123456789101112131415161718192021 123456789101112131415161718192021

好了，到这我对这个控件已经不是一般的喜欢了~~~

当然了只提供了一种动画，那么我们肯定可以去自定义各种nice的动画效果。高兴的是，github上已经有很多类似的项目了，这里我们直接引用下： RecyclerViewItemAnimators ，大家自己下载查看。提供了 SlideInOutLeftItemAnimator , SlideInOutRightItemAnimator , SlideInOutTopItemAnimator , SlideInOutBottomItemAnimator 等动画效果。

点击事件：

Click and LongClick

不过一个挺郁闷的地方就是，系统没有提供ClickListener和LongClickListener。不过我们也可以自己去添加，只是会多了些代码而已。实现的方式比较多，你可以通过mRecyclerView.addOnItemTouchListener去监听然后去判断手势，当然你也可以通过adapter中自己去提供回调，这里我们选择后者，前者的方式，大家有兴趣自己去实现。

那么代码也比较简单：

class HomeAdapter extends RecyclerView.Adapter<HomeAdapter.MyViewHolder> { //... public interface OnItemClickLitener { void onItemClick(View view, int position); void onItemLongClick(View view , int position); } private OnItemClickLitener mOnItemClickLitener; public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener) { this.mOnItemClickLitener = mOnItemClickLitener; } @Override public void onBindViewHolder(final MyViewHolder holder, final int position) { holder.tv.setText(mDatas.get(position)); // 如果设置了回调，则设置点击事件 if (mOnItemClickLitener != null) { holder.itemView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { int pos = holder.getLayoutPosition(); mOnItemClickLitener.onItemClick(holder.itemView, pos); } }); holder.itemView.setOnLongClickListener(new OnLongClickListener() { @Override public boolean onLongClick(View v) { int pos = holder.getLayoutPosition(); mOnItemClickLitener.onItemLongClick(holder.itemView, pos); return false; } }); } } //... } 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950

adapter中自己定义了个接口，然后在onBindViewHolder中去为holder.itemView去设置相应的监听最后回调我们设置的监听。

最后别忘了给item添加一个drawable:

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android" > <item android:state_pressed="true" android:drawable="@color/color_item_press"></item> <item android:drawable="@color/color_item_normal"></item> </selector> 123456 123456

Activity中去设置监听：

mAdapter.setOnItemClickLitener(new OnItemClickLitener() { @Override public void onItemClick(View view, int position) { Toast.makeText(HomeActivity.this, position + " click", Toast.LENGTH_SHORT).show(); } @Override public void onItemLongClick(View view, int position) { Toast.makeText(HomeActivity.this, position + " long click", Toast.LENGTH_SHORT).show(); mAdapter.removeData(position); } }); 1234567891011121314151617181920 1234567891011121314151617181920

测试效果：

这里不需要暴露点击事件的话，直接在里面设置点击就可以了 public void onBindViewHolder(ViewHolderA holder, final int position) { ..... ..... holder.mTextView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Toast.makeText(mContext, "item"+position,Toast.LENGTH_SHORT).show(); } }); ..... }

与某些View结合使用

可以被SwipeRefreshLayout实现Android原生下拉刷新，也可以实现第三方下拉刷新item可以使用CardView，恩，超漂亮

滑动监听addOnScrollListener 可实现下拉刷新等

实现这个借口的俩个方法

onScrollStateChangedonScrolled mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() { //标记当前是否向最后一项滑动 boolean isSlidingToLast = false; @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { super.onScrollStateChanged(recyclerView, newState); //获取当前的LayoutManager LinearLayoutManager manager = (LinearLayoutManager) recyclerView.getLayoutManager(); //当不滚动的时候 if (newState == RecyclerView.SCROLL_STATE_IDLE) { //得到最后一个完全显示的item的position int lastViusalItem = manager.findLastCompletelyVisibleItemPosition(); //总的ITemPosition int totalItemCount = manager.getItemCount(); //当前是否向下滑，是否滚动到LastItem if (lastViusalItem == (totalItemCount - 1) && isSlidingToLast) { // 这里就是下拉加载更多功能的逻辑 //往item的List里添加数据，并通知适配器更新 adapter.addListData(lastViusalItem); } } } @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); //如果dy>0则当前向下滑state if (dy > 0) { isSlidingToLast = true; } else if (dy < 0) { isSlidingToLast = false; } } });

case RecyclerView.SCROLL_STATE_IDLE: //当停止滚动时,当前的recycleView不滑动(滑动已经停止时) break; case RecyclerView.SCROLL_STATE_DRAGGING: //滚动时,当前的recycleView被拖动滑动 //没错，下面这一坨就是隐藏软键盘的代码 //((InputMethodManager)getSystemService(INPUT_METHOD_SERVICE)).hideSoftInputFromWindow(CustomClaimTargetListDetailActivity.this.getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS); break; case RecyclerView.SCROLL_STATE_SETTLING: //手指抬起，但是屏幕还在滚动状态,当前的recycleView在滚动到某个位置的动画过程,但没有被触摸滚动.调用 scrollToPosition(int) 应该会触发这个状态 break;

adapter里添加

public void addListData(int position){ for (int i = 0; i <6; i++) { mList.add("底部添加" + i); } //通知适配器item内容删除 notifyItemChanged(position); }

这里的LayoutManager对象manager还可以获取到很多参数，比如

可以用tm来实现更多逻辑功能

自动加载

ItemTouchHelper实现item删除，互相拉动

一个大神写的

Android实现RecyclerView侧滑删除和长按拖拽-ItemTouchHelper ，讲的很清楚，这里不再详解，贴上测试的代码，仅做记录

在setAdapter后面添加

ItemTouchHelper.Callback mCallback = new ItemTouchHelper.SimpleCallback(ItemTouchHelper.DOWN|ItemTouchHelper.UP, ItemTouchHelper.RIGHT) { @Override public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) { int fromPosition = viewHolder.getAdapterPosition();//得到拖动ViewHolder的position int toPosition = target.getAdapterPosition();//得到目标ViewHolder的position if (fromPosition < toPosition){ // 向下 for (int i = fromPosition; i < toPosition; i++) { Collections.swap(list, i, i+1); } }else { for (int i = fromPosition; i < toPosition; i++) { // 向上 Collections.swap(list, i, i-1); } } mTestRecycleViewAdapterMulType.notifyItemMoved(fromPosition, toPosition); //返回true表示执行拖动 return true; } @Override public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) { int position = viewHolder.getAdapterPosition(); list.remove(position); mTestRecycleViewAdapterMulType.notifyItemRemoved(position); } }; ItemTouchHelper mItemTouchHelper = new ItemTouchHelper(mCallback); mItemTouchHelper.attachToRecyclerView(mRecyclerView);

效果

1.gif

RecycleView多种布局显示

先看效果

多布局

RecycleView.Adapter也提供了getItemViewType方法，此方法和ListView加载多布局一样。

这里需要注意的是这里的范型不再是自己写的ViewHolder

public class TestRecycleViewAdapterMulType extends RecyclerView.Adapter<RecyclerView.ViewHolder>

重写adapter的getItemViewType

public int getItemViewType(int position) { if (position == 0) { //111代表顶部item return 111; } else if (position == getItemCount() - 1) { //111代表di部item return 112; } //111代表中间item return 110; }

自定义3个ViewHolder，分别表示top ，bottom 和中间的item布局

/** * 代表顶部item */ class ViewHolderA extends RecyclerView.ViewHolder { ImageView mImageViewA; public ViewHolderA(View itemView) { super(itemView); mImageViewA = (ImageView) itemView.findViewById(R.id.top_imageview); } } /** * 代表di部item */ class ViewHolderB extends RecyclerView.ViewHolder { ImageView mImageViewB; public ViewHolderB(View itemView) { super(itemView); mImageViewB = (ImageView) itemView.findViewById(R.id.bottom_imageview); } } /** * 代表中间item */ class ViewHolderC extends RecyclerView.ViewHolder { TextView mTextView; public ViewHolderC(View itemView) { super(itemView); mTextView = (TextView) itemView.findViewById(R.id.recycle_textview); } }

在onCreateViewHolder方法里

@Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = null; RecyclerView.ViewHolder holder = null; //此处动态加载ViewHolder的布局文件并返回holder switch (viewType) { case 111: //111代表顶部item view = LayoutInflater.from(mContext).inflate(R.layout.top, parent, false); holder = new ViewHolderA(view); break; case 112: //112代表顶部item view = LayoutInflater.from(mContext).inflate(R.layout.bottom, parent, false); holder = new ViewHolderB(view); break; case 110: //112代表中间item view = LayoutInflater.from(mContext).inflate(R.layout.recycleview_item, parent, false); holder = new ViewHolderC(view); break; } return holder; }

最后是onBindViewHolder，在这里分别设置不同布局item数据

@Override public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) { // //这样写也行 // if(holder instanceof ViewHolderA){ // ViewHolderA holderA = (ViewHolderA) holder; // holderA.mImageViewA.setImageResource(R.mipmap.ic_launcher); // }else if(holder instanceof ViewHolderB)..... // ..... switch (getItemViewType(position)) { case 111: ViewHolderA holderA = (ViewHolderA) holder; holderA.mImageViewA.setImageResource(R.mipmap.ic_launcher); break; case 112: ViewHolderB holderB = (ViewHolderB) holder; holderB.mImageViewB.setImageResource(R.mipmap.ic_launcher); break; case 110: ViewHolderC holderC = (ViewHolderC) holder; holderC.mTextView.setText(mList.get(position)); break; } }

贴一下完整Adapter代码

** * Created by NIWA on 2017/3/9. */ public class TestRecycleViewAdapterMulType extends RecyclerView.Adapter<RecyclerView.ViewHolder> { private Context mContext; private List<String> mList; public TestRecycleViewAdapterMulType(Context context, List<String> list) { mContext = context; mList = list; } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = null; RecyclerView.ViewHolder holder = null; //此处动态加载ViewHolder的布局文件并返回holder switch (viewType) { case 111: //111代表顶部item view = LayoutInflater.from(mContext).inflate(R.layout.top, parent, false); holder = new ViewHolderA(view); break; case 112: //112代表顶部item view = LayoutInflater.from(mContext).inflate(R.layout.bottom, parent, false); holder = new ViewHolderB(view); break; case 110: //112代表中间item view = LayoutInflater.from(mContext).inflate(R.layout.recycleview_item, parent, false); holder = new ViewHolderC(view); break; } return holder; } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) { // //这样写也行 // if(holder instanceof ViewHolderA){ // ViewHolderA holderA = (ViewHolderA) holder; // holderA.mImageViewA.setImageResource(R.mipmap.ic_launcher); // }else if(holder instanceof ViewHolderB)..... // ..... switch (getItemViewType(position)) { case 111: ViewHolderA holderA = (ViewHolderA) holder; holderA.mImageViewA.setImageResource(R.mipmap.ic_launcher); break; case 112: ViewHolderB holderB = (ViewHolderB) holder; holderB.mImageViewB.setImageResource(R.mipmap.ic_launcher); break; case 110: ViewHolderC holderC = (ViewHolderC) holder; holderC.mTextView.setText(mList.get(position)); break; } } @Override public int getItemCount() { //生成的item的数量 return mList.size(); } /** * 代表顶部item */ class ViewHolderA extends RecyclerView.ViewHolder { ImageView mImageViewA; public ViewHolderA(View itemView) { super(itemView); mImageViewA = (ImageView) itemView.findViewById(R.id.top_imageview); } } /** * 代表di部item */ class ViewHolderB extends RecyclerView.ViewHolder { ImageView mImageViewB; public ViewHolderB(View itemView) { super(itemView); mImageViewB = (ImageView) itemView.findViewById(R.id.bottom_imageview); } } /** * 代表中间item */ class ViewHolderC extends RecyclerView.ViewHolder { TextView mTextView; public ViewHolderC(View itemView) { super(itemView); mTextView = (TextView) itemView.findViewById(R.id.recycle_textview); } } @Override public int getItemViewType(int position) { if (position == 0) { //111代表顶部item return 111; } else if (position == getItemCount() - 1) { //因为item是从0开始，所以最后一项应该是getItemCount() - 1 //111代表di部item return 112; } //111代表中间item return 110; } }

最后在Activity里

mTestRecycleViewAdapterMulType = new TestRecycleViewAdapterMulType(getApplicationContext(), list); mRecyclerView.setAdapter(mTestRecycleViewAdapterMulType);

heiheihei

注意

刷新数据的几个方法 notifyItemInserted(); notifyItemRangeInserted(); notifyItemChanged(); notifyItemRangeChanged(); notifyItemRemoved(); notifyItemRangeRemoved();

稍作记录，待测试中

开源库XRecycleView

据我所知，支付宝用了这个库

XRecyclerView

用法和原生RecycleView一样封装好了下拉刷新，上拉加载，刷新动画增加头部，甚至增加俩个headerView

本篇完

参考文章：

http://www.jianshu.com/p/c35ca003654d

http://blog.csdn.net/lmj623565791/article/details/45059587 RecycleView万能适配器：http://www.jianshu.com/p/b343fcff51b0

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