具体使用可参照源址：
https://blog.csdn.net/a_zhon/article/details/66971369
1.BaseRecyclerViewAdapter.java
package com.lt.test_util.base;
import android.content.Context;
import android.support.annotation.LayoutRes;
import android.support.annotation.NonNull;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.Adapter;
import android.support.v7.widget.RecyclerView.ViewHolder;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup;
import java.util.ArrayList;
import java.util.List;
/**
* @作者: LinTan
* @日期: 2018/12/12 12:10
* @版本: 1.3
* @描述: //RecyclerView的封装类。注意引入依赖。
* 源址: https://blog.csdn.net/a_zhon/article/details/66971369
* 1.0: Initial Commit
* 1.1: 替换数据操作的视图更改方式，由notifyDataSetChanged()改为notifyItemXXXX()，提高性能
* *** 注意: notifyItemXXXX()修改视图不会重新执行onBindViewHolder()，
* *** 导致了position错乱，所以需要调用notifyItemRangeChanged()重新计算position
* 1.2: 修复addHeadView后，数据操作时position异常问题
* 1.3: 修复LayoutManager为网格或瀑布流时，HeadView与FootView不能占满一行的问题
* 1.4: 优化RecyclerView性能，将ItemView的findViewById和点击事件的初始化移至onCreateViewHolder()
* 1.5: 发现Bug，1.4版优化后会导致数据源随RecyclerView的ItemView复用，故Return
* <p>
* implementation 'com.android.support:recyclerview-v7:28.0.0'
*/
public abstract class BaseRecyclerViewAdapter<DS, VH extends ViewHolder> extends Adapter<VH>
implements OnClickListener, OnLongClickListener {//DS:DataSource，VH:ViewHolder
private final int VIEW_TYPE_ITEM = 1008601;
private final int VIEW_TYPE_HEAD = 1008602;
private final int VIEW_TYPE_FOOT = 1008603;
private int mItemViewId;
private int mHeadViewId = -1;
private int mFootViewId = -1;
private List<DS> mDataSourceList;
private OnItemClickListener mItemClickListener;
private OnItemLongClickListener mItemLongClickListener;
public BaseRecyclerViewAdapter(@LayoutRes int layoutResId, List<DS> DataSourceList) {
if (layoutResId == 0) {
throw new NullPointerException("请设置item资源id");
} else {
mItemViewId = layoutResId;
}
if (DataSourceList == null) {
mDataSourceList = new ArrayList<>();
} else {
mDataSourceList = DataSourceList;
}
}
@SuppressWarnings("unchecked")
@NonNull
@Override
public VH onCreateViewHolder(@NonNull ViewGroup viewGroup, int viewType) {
View view;
switch (viewType) {
case VIEW_TYPE_HEAD:
view = LayoutInflater.from(viewGroup.getContext())
.inflate(mHeadViewId, viewGroup, false);
break;
case VIEW_TYPE_FOOT:
view = LayoutInflater.from(viewGroup.getContext())
.inflate(mFootViewId, viewGroup, false);
break;
default:
view = LayoutInflater.from(viewGroup.getContext())
.inflate(mItemViewId, viewGroup, false);
view.setOnClickListener(this);
view.setOnLongClickListener(this);
break;
}
return (VH) new BaseViewHolder(view);
}//创建视图管理器
@Override
public void onBindViewHolder(@NonNull VH viewHolder, int position) {
switch (viewHolder.getItemViewType()) {
case VIEW_TYPE_HEAD:
break;
case VIEW_TYPE_FOOT:
break;
default:
if (mHeadViewId == -1) {
viewHolder.itemView.setTag(position);
bindView(viewHolder);
initView(viewHolder.itemView.getContext(), mDataSourceList.get(position),
position);
initListener(viewHolder);
}//无HeadView时的处理
else {
viewHolder.itemView.setTag(position - 1);
bindView(viewHolder);
initView(viewHolder.itemView.getContext(), mDataSourceList.get(position - 1),
(position - 1));
initListener(viewHolder);
}//有HeadView时的处理
break;
}
}//绑定数据到视图
@Override
public int getItemCount() {
if (mHeadViewId != -1 && mFootViewId != -1) {
return mDataSourceList.size() + 2;
}//若同时添加HeadView与FootView，数据源大小+2
if (mHeadViewId != -1 || mFootViewId != -1) {
return mDataSourceList.size() + 1;
}//若仅添加HeadView或FootView其一，数据源大小+1
return mDataSourceList.size();//仅有ItemView，数据源大小正常
}//获取数据源的大小
@Override
public int getItemViewType(int position) {
int viewType = VIEW_TYPE_ITEM;
if (position == 0 && mHeadViewId != -1) {
viewType = VIEW_TYPE_HEAD;
}//判断是否添加了HeadView
if (position == getItemCount() - 1 && mFootViewId != -1) {
viewType = VIEW_TYPE_FOOT;
}//判断是否添加了FootView
return viewType;
}//获取ItemView的类型
@Override
public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
RecyclerView.LayoutManager viewLayoutManager = recyclerView.getLayoutManager();
if (viewLayoutManager instanceof GridLayoutManager) {
final GridLayoutManager gridLayoutManager = (GridLayoutManager) viewLayoutManager;
gridLayoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
@Override
public int getSpanSize(int position) {
switch (getItemViewType(position)) {
case VIEW_TYPE_HEAD:
return gridLayoutManager.getSpanCount();
case VIEW_TYPE_FOOT:
return gridLayoutManager.getSpanCount();
default:
return 1;
}
}
});
}
}//当LayoutManager为GridLayoutManager时，让HeadView与FootView占满所在行
@Override
public void onViewAttachedToWindow(@NonNull VH viewHolder) {
super.onViewAttachedToWindow(viewHolder);
ViewGroup.LayoutParams viewGroupLayoutParams = viewHolder.itemView.getLayoutParams();
if (viewGroupLayoutParams instanceof StaggeredGridLayoutManager.LayoutParams) {
StaggeredGridLayoutManager.LayoutParams sglManagerLayoutParams
= (StaggeredGridLayoutManager.LayoutParams) viewGroupLayoutParams;
switch (getItemViewType(viewHolder.getLayoutPosition())) {
case VIEW_TYPE_HEAD:
sglManagerLayoutParams.setFullSpan(true);
case VIEW_TYPE_FOOT:
sglManagerLayoutParams.setFullSpan(true);
}
}
}//当LayoutManager为StaggeredGridLayoutManager时，让HeadView与FootView占满所在行
public void addHeadView(@LayoutRes int layoutResId) {
mHeadViewId = layoutResId;
}//添加HeadView
public void addFootView(@LayoutRes int layoutResId) {
mFootViewId = layoutResId;
}//添加FootView
public void addData(DS dataSource) {
int oldDataSourceListSize = mDataSourceList.size();
mDataSourceList.add(dataSource);
if (mHeadViewId == -1) {
notifyItemInserted(oldDataSourceListSize);
notifyItemRangeChanged(oldDataSourceListSize, 0);
} else {
notifyItemInserted(oldDataSourceListSize + 1);
notifyItemRangeChanged(oldDataSourceListSize + 1, 0);
}
}//添加数据
public void delData(int position) {
int oldDataSourceListSize = mDataSourceList.size();
mDataSourceList.remove(position);
if (mHeadViewId == -1) {
notifyItemRemoved(position);
notifyItemRangeChanged(position,
oldDataSourceListSize - position);
} else {
notifyItemRemoved(position + 1);
notifyItemRangeChanged(position + 1,
oldDataSourceListSize - position);
}
}//删除数据
public void clearData() {
int oldDataSourceListSize = mDataSourceList.size();
mDataSourceList.clear();
if (mHeadViewId == -1) {
notifyItemRangeRemoved(0, oldDataSourceListSize);
} else {
notifyItemRangeRemoved(1, oldDataSourceListSize);
}
}//清空数据
public void refreshData(List<DS> dataSourceList) {
int oldDataSourceListSize = mDataSourceList.size();
int newDataSourceListSize = dataSourceList.size();
if (mHeadViewId == -1) {
mDataSourceList.clear();
notifyItemRangeRemoved(0, oldDataSourceListSize);
mDataSourceList.addAll(dataSourceList);
notifyItemRangeInserted(0, newDataSourceListSize);
} else {
mDataSourceList.clear();
notifyItemRangeRemoved(1, oldDataSourceListSize);
mDataSourceList.addAll(dataSourceList);
notifyItemRangeInserted(1, newDataSourceListSize);
}
}//刷新数据
public void loadMoreData(List<DS> dataSourceList) {
int oldDataSourceListSize = mDataSourceList.size();
int newDataSourceListSize = dataSourceList.size();
mDataSourceList.addAll(dataSourceList);
if (mHeadViewId == -1) {
notifyItemRangeInserted(oldDataSourceListSize, newDataSourceListSize);
} else {
notifyItemRangeInserted(oldDataSourceListSize + 1, newDataSourceListSize);
}
}//加载更多数据
public void setItemClickListener(OnItemClickListener itemClickListener) {
mItemClickListener = itemClickListener;
}//item点击监听器
public void setItemLongClickListener(OnItemLongClickListener itemLongClickListener) {
mItemLongClickListener = itemLongClickListener;
}//item长点击监听器
@Override
public void onClick(View view) {
if (mItemClickListener != null) {
mItemClickListener.onItemClick(view, (Integer) view.getTag());
}
}//点击回调
@Override
public boolean onLongClick(View view) {
boolean b = false;
if (mItemLongClickListener != null) {
b = mItemLongClickListener.onItemLongClick(view, (Integer) view.getTag());
}
return b;
}//长点击回调
public interface OnItemClickListener {
void onItemClick(View view, int position);
}//item点击监听器的接口
public interface OnItemLongClickListener {
boolean onItemLongClick(View view, int position);
}//item长点击监听器的接口
protected abstract void bindView(VH viewHolder);
protected abstract void initView(Context context, DS dataSource, int position);
protected abstract void initListener(VH viewHolder);
}2.BaseViewHolder.java
package com.lt.test_util.base;
import android.support.annotation.DrawableRes;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView.ViewHolder;
import android.util.SparseArray;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
/**
* @作者: LinTan
* @日期: 2018/12/12 12:10
* @版本: 1.0
* @描述: //RecyclerView的封装类。注意引入依赖。
* 源址: https://blog.csdn.net/a_zhon/article/details/66971369
* 1.0: Initial Commit
* <p>
* implementation 'com.android.support:recyclerview-v7:28.0.0'
*/
public class BaseViewHolder extends ViewHolder {
private SparseArray<View> mViewSparseArray;//Key为View的Id，Value为View对象
public BaseViewHolder(@NonNull View itemView) {
super(itemView);
mViewSparseArray = new SparseArray<>();
}
@SuppressWarnings("unchecked")
public <T extends View> T findViewById(int viewId) {
View view = mViewSparseArray.get(viewId);
if (view == null) {
view = itemView.findViewById(viewId);
mViewSparseArray.put(viewId, view);
}
return (T) view;
}//findViewById，并存储到SparseArray中
public ImageView setImageResource(int viewId, @DrawableRes int imageResId) {
ImageView view = findViewById(viewId);
view.setImageResource(imageResId);
return view;
}//设置图片
public TextView setText(int viewId, CharSequence s) {
TextView view = findViewById(viewId);
view.setText(s);
return view;
}//设置文本
}
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