Android RecycleView添加head配置封装的实例

2023-09-25 13:56:07 150

AndroidRecycleView添加head配置封装的实例

这个是把RecycleView的适配器给封装了，直接调用就可以了，还添加了可以添加head头部功能，很赞的，今天记下来，下次直接用

实例代码：

packagecom.wwl.android;

importandroid.support.v7.widget.GridLayoutManager;
importandroid.support.v7.widget.RecyclerView;
importandroid.support.v7.widget.StaggeredGridLayoutManager;
importandroid.view.View;
importandroid.view.ViewGroup;

importjava.util.ArrayList;


publicabstractclassBaseRecyclerAdapterextendsRecyclerView.Adapter{

publicstaticfinalintTYPE_HEADER=0;
publicstaticfinalintTYPE_NORMAL=1;

privateArrayListmDatas=newArrayList<>();

privateViewmHeaderView;

privateOnItemClickListenermListener;

publicvoidsetOnItemClickListener(OnItemClickListenerli){
mListener=li;
}

publicvoidsetHeaderView(ViewheaderView){
mHeaderView=headerView;
notifyItemInserted(0);
}

publicViewgetHeaderView(){
returnmHeaderView;
}

publicvoidaddDatas(ArrayListdatas){
mDatas.addAll(datas);
notifyDataSetChanged();
}

@Override
publicintgetItemViewType(intposition){
if(mHeaderView==null)returnTYPE_NORMAL;
if(position==0)returnTYPE_HEADER;
returnTYPE_NORMAL;
}

@Override
publicRecyclerView.ViewHolderonCreateViewHolder(ViewGroupparent,finalintviewType){
if(mHeaderView!=null&&viewType==TYPE_HEADER)returnnewHolder(mHeaderView);
returnonCreate(parent,viewType);
}


@Override
publicvoidonBindViewHolder(RecyclerView.ViewHolderviewHolder,intposition){
if(getItemViewType(position)==TYPE_HEADER)return;

finalintpos=getRealPosition(viewHolder);
finalTdata=mDatas.get(pos);
onBind(viewHolder,pos,data);

if(mListener!=null){
viewHolder.itemView.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
mListener.onItemClick(pos,data);
}
});
}
}

@Override
publicvoidonAttachedToRecyclerView(RecyclerViewrecyclerView){
super.onAttachedToRecyclerView(recyclerView);

RecyclerView.LayoutManagermanager=recyclerView.getLayoutManager();
if(managerinstanceofGridLayoutManager){
finalGridLayoutManagergridManager=((GridLayoutManager)manager);
gridManager.setSpanSizeLookup(newGridLayoutManager.SpanSizeLookup(){
@Override
publicintgetSpanSize(intposition){
returngetItemViewType(position)==TYPE_HEADER
?gridManager.getSpanCount():1;
}
});
}
}

@Override
publicvoidonViewAttachedToWindow(RecyclerView.ViewHolderholder){
super.onViewAttachedToWindow(holder);
ViewGroup.LayoutParamslp=holder.itemView.getLayoutParams();
if(lp!=null
&&lpinstanceofStaggeredGridLayoutManager.LayoutParams
&&holder.getLayoutPosition()==0){
StaggeredGridLayoutManager.LayoutParamsp=(StaggeredGridLayoutManager.LayoutParams)lp;
p.setFullSpan(true);
}
}

publicintgetRealPosition(RecyclerView.ViewHolderholder){
intposition=holder.getLayoutPosition();
returnmHeaderView==null?position:position-1;
}

@Override
publicintgetItemCount(){
returnmHeaderView==null?mDatas.size():mDatas.size()+1;
}

publicabstractRecyclerView.ViewHolderonCreate(ViewGroupparent,finalintviewType);
publicabstractvoidonBind(RecyclerView.ViewHolderviewHolder,intRealPosition,Tdata);

publicclassHolderextendsRecyclerView.ViewHolder{
publicHolder(ViewitemView){
super(itemView);
}
}

publicinterfaceOnItemClickListener{
voidonItemClick(intposition,Tdata);
}
}

然后在外面自己的适配器中直接继承就可以了

packagecom.wwl.android;

importandroid.support.v7.widget.RecyclerView;
importandroid.view.LayoutInflater;
importandroid.view.View;
importandroid.view.ViewGroup;
importandroid.widget.TextView;

/**
*wwl
*/
publicclassMyAdapterextendsBaseRecyclerAdapter{

@Override
publicRecyclerView.ViewHolderonCreate(ViewGroupparent,intviewType){
Viewlayout=LayoutInflater.from(parent.getContext()).inflate(R.layout.item,parent,false);
returnnewMyHolder(layout);
}

@Override
publicvoidonBind(RecyclerView.ViewHolderviewHolder,intRealPosition,Stringdata){
if(viewHolderinstanceofMyHolder){
((MyHolder)viewHolder).text.setText(data);
}
}

classMyHolderextendsBaseRecyclerAdapter.Holder{
TextViewtext;
publicMyHolder(ViewitemView){
super(itemView);
text=(TextView)itemView.findViewById(R.id.text);
}
}
}

然后在类中调用，

publicclassMainActivityextendsAppCompatActivity{

privateRecyclerViewmRecyclerView;
privateRecyclerView.LayoutManagermLayoutManager;
privateMyAdaptermAdapter;

@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

mRecyclerView=(RecyclerView)findViewById(R.id.list);
//mLayoutManager=newLinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
mLayoutManager=newGridLayoutManager(this,2);
//mLayoutManager=newStaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL);
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.setItemAnimator(newDefaultItemAnimator());
mRecyclerView.addItemDecoration(newGridItemDecoration(this,true));

mAdapter=newMyAdapter();
mRecyclerView.setAdapter(mAdapter);
mAdapter.addDatas(generateData());
setHeader(mRecyclerView);
mAdapter.setOnItemClickListener(newBaseRecyclerAdapter.OnItemClickListener(){
@Override
publicvoidonItemClick(intposition,Stringdata){
Toast.makeText(MainActivity.this,position+","+data,Toast.LENGTH_SHORT).show();
}
});
}

privatevoidsetHeader(RecyclerViewview){
Viewheader=LayoutInflater.from(this).inflate(R.layout.header,view,false);

mAdapter.setHeaderView(header);
}

privateArrayListgenerateData(){
ArrayListdata=newArrayList(){
{
for(inti=0;i<21;i++)add("数据"+i);
}
};
returndata;
}

}

这样就OK啦。

布局文件：

R.layout.activity_main

header.xml

item.xml

以上就是AndroidRecycleView添加head配置封装的实例，如有疑问请留言或者到本站社区交流讨论，感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！

Android RecycleView添加head配置封装的实例

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