Android RecyclerView仿新闻头条的频道管理功能

2024-02-21 15:50:03 459

需要在build里添加依赖

compile'com.android.support:recyclerview-v7:25.3.1'

布局文件activity_main

在layout下定义一个message.xml布局文件,用来显示RecyclerView里的文字,跟listview的意义差不多

写一个MyItemOnClickListener接口用来监听点击事件,在里边传入两个参数,第一个是试图,第二是点击的下标

publicinterfaceMyItemOnClickListener{
voidonClick(Viewview,intposition);
}

RecyclerView的适配器类

//RecyclerView.Adapter里写的是优化继承ViewHolder的帮助类
publicclassViewAdapterextendsRecyclerView.Adapter{
privateContextmContext;
/**
*特别注意一下mList后面一定要默认赋值,不然运行的时候会报错,因为我们默认上面的RecyclerView是没有添加数据的
*/
privateListmList=newArrayList<>();
privateMyItemOnClickListenermyItemOnClickListener;
publicViewAdapter(Contextcontext){
this.mContext=context;
}
//传数组的方法
publicvoidsetMessage(Listlist){
this.mList=list;
}
//写个方法把接口传过来
publicvoidsetMyItemOnClickListener(MyItemOnClickListenermyItemOnClickListener)
{
this.myItemOnClickListener=myItemOnClickListener;
}
@Override
publicMyViewHolderonCreateViewHolder(ViewGroupparent,intviewType){
//打气筒填充我们自定义的message.xml的试图
Viewview=View.inflate(mContext,R.layout.messgae,null);
//优化
finalMyViewHolderholder=newMyViewHolder(view);
//监听
view.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
//调用我们自定义接口的方法
myItemOnClickListener.onClick(v,holder.getLayoutPosition());
}
});
returnholder;
}
@Override
publicvoidonBindViewHolder(MyViewHolderholder,intposition){
MyViewHolderviewHolder=holder;
viewHolder.textView.setText(mList.get(position));
}
@Override
publicintgetItemCount(){
returnmList.size();
}
//ViewHolder优化
staticclassMyViewHolderextendsRecyclerView.ViewHolder{
privateTextViewtextView;
publicMyViewHolder(ViewitemView){
super(itemView);
textView=(TextView)itemView.findViewById(R.id.textView);
}
}
}

在MainActivity的实现

publicclassMainActivityextendsAppCompatActivity{
privateRecyclerViewrecyclerView_up;
privateRecyclerViewrecyclerView_down;
privateListlistUp=newArrayList<>();
privateListlistDown=newArrayList<>();
privateViewAdapteradapterUp;
privateViewAdapteradapterDown;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//添加数据
initData();
initView();
}
//添加数据
for(inti=0;i<15;i++){
//默认的我们只给下面的RecyclerView添加了数据
listDown.add("频道管理"+i);
}
}
privatevoidinitView(){
recyclerView_up=(RecyclerView)findViewById(R.id.recyclerView_up);
recyclerView_down=(RecyclerView)findViewById(R.id.recyclerView_down);
initUp();
initDown();
}
privatevoidinitUp(){
//创建适配器
adapterUp=newViewAdapter(MainActivity.this);
//添加数据,我们默认创建的时候是空的
adapterUp.setMessage(listUp);
recyclerView_up.setAdapter(adapterUp);
//RecyclerView显示样式
GridLayoutManagergridLayoutManagerUp=newGridLayoutManager(this,3);
recyclerView_up.setLayoutManager(gridLayoutManagerUp);
//点击监听
adapterUp.setMyItemOnClickListener(newMyItemOnClickListener(){
@Override
publicvoidonClick(Viewview,intposition){
Log.e("Up","上"+position);
//下面的RecyclerView添加当前点击的条目信息并刷新数组
listDown.add(listUp.get(position));
adapterDown.setMessage(listDown);
adapterDown.notifyDataSetChanged();
//从当前数组移除数据并刷新数组
listUp.remove(position);
adapterUp.setMessage(listUp);
adapterUp.notifyDataSetChanged();
}
});
}
privatevoidinitDown(){
adapterDown=newViewAdapter(MainActivity.this);
adapterDown.setMessage(listDown);
recyclerView_down.setAdapter(adapterDown);
GridLayoutManagergridLayoutManagerDown=newGridLayoutManager(this,3);
recyclerView_down.setLayoutManager(gridLayoutManagerDown);
adapterDown.setMyItemOnClickListener(newMyItemOnClickListener(){
@Override
publicvoidonClick(Viewview,intposition){
Log.e("Down","下"+position);
//下面的RecyclerView添加当前点击的条目信息并刷新数组
listUp.add(listDown.get(position));
adapterUp.setMessage(listUp);
adapterUp.notifyDataSetChanged();
//从当前数组移除数据并刷新数组
listDown.remove(position);
adapterDown.setMessage(listDown);
adapterDown.notifyDataSetChanged();
}
});
}
}

以上所述是小编给大家介绍的AndroidRecyclerView仿新闻头条的频道管理功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持！

Android RecyclerView仿新闻头条的频道管理功能

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