Android中封装RecyclerView实现添加头部和底部示例代码

前言

我们大家都知道ListView具有添加头部和添加底部的方法，但是RecyclerView并没有这样子的方法。所以RecyclerView是不能添加底部和头部的，但是能不能仿造ListView来实现RecyclerView添加头部和底部呢？答案当然是可行的。本文就来给大家介绍了关于Android封装RecyclerView添加头部和底部的相关内容，分享出来供大家参考学习，下面话不多说了，来一起看看详细的介绍吧。

首先看下实现的效果：

代码如下：

public class WrapMyRecyclerView extends RecyclerView { private Adapter mAdapter; private ArrayList<View> mHeaderViewInfos = new ArrayList<>();//保存headerView private ArrayList<View> mFooterViewInfos = new ArrayList<>();//保存footerView public WrapMyRecyclerView(Context context) {  super(context); } public WrapMyRecyclerView(Context context, @Nullable AttributeSet attrs) {  super(context, attrs); } public WrapMyRecyclerView(Context context, @Nullable AttributeSet attrs, int defStyle) {  super(context, attrs, defStyle); }  public void addHeaderView(View v) {  mHeaderViewInfos.add(v);  // Wrap the adapter if it wasn't already wrapped.  if (mAdapter != null) {   if (!(mAdapter instanceof RecyclerHeaderViewListAdapter)) {    wrapHeaderListAdapterInternal();   }  } }  public void addFooterView(View v) {  mFooterViewInfos.add(v);  // Wrap the adapter if it wasn't already wrapped.  if (mAdapter != null) {   if (!(mAdapter instanceof RecyclerHeaderViewListAdapter)) {    wrapHeaderListAdapterInternal();   }  } }  @Override public void setAdapter(Adapter adapter) {  if (mHeaderViewInfos.size() > 0 || mFooterViewInfos.size() > 0) {   mAdapter = wrapHeaderListAdapterInternal(mHeaderViewInfos, mFooterViewInfos, adapter);  } else {   mAdapter = adapter;  }  super.setAdapter(mAdapter); } private void wrapHeaderListAdapterInternal() {  mAdapter = wrapHeaderListAdapterInternal(mHeaderViewInfos, mFooterViewInfos, mAdapter); }  protected RecyclerHeaderViewListAdapter wrapHeaderListAdapterInternal(   ArrayList<View> headerViewInfos,   ArrayList<View> footerViewInfos,   Adapter adapter) {  return new RecyclerHeaderViewListAdapter(headerViewInfos, footerViewInfos, adapter); }}