RecyclerView的基本用法 （一个控件实现ListView， GridView等效果）+接口回调点击事件

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="bawe.com.day_recyclerview_lianxi.MainActivity">

<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/recyclerview"
></android.support.v7.widget.RecyclerView>

<

</android.support.constraint.ConstraintLayout>

package bawe.com.day_recyclerview_lianxi;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.widget.Toast;

import java.util.ArrayList;

import static android.widget.LinearLayout.VERTICAL;

public class MainActivity extends AppCompatActivity {

private ArrayList<User> list;
private RecyclerView idrecy;
private RecyclerViewDataAdpater dataAdpater;
private int itemLong;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

idrecy = (RecyclerView) findViewById(R.id.recyclerview);

list = new ArrayList<User>();
//添加数据
for(int i=0 ; i< 20; i++){

User user = new User();

user.setImg(R.mipmap.ic_launcher);
user.setName("第"+i+"条数据");
list.add(user);
}

//list集合的数量
itemLong = list.size();
//线性布局管理器     VERTICAL垂直 条目
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this,VERTICAL,false );

//HORIZONTAL    横向 条目
//        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this,HORIZONTAL,false );

//表格布局管理器    一行3列   VERTICAL垂直
//        GridLayoutManager gridLayoutManager = new GridLayoutManager(this,3 ,VERTICAL,false);
//        GridLayoutManager gridLayoutManager = new GridLayoutManager(this,3 , LinearLayoutManager.HORIZONTAL,false);

//流式布局
//        StaggeredGridLayoutManager staggeredGridLayoutManager = new StaggeredGridLayoutManager(2,VERTICAL );
idrecy.setLayoutManager(linearLayoutManager);

idrecy.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
//适配器
dataAdpater = new RecyclerViewDataAdpater(t
4000
his, list);
//点击事件     调用接口方法
dataAdpater.setOnRecyclerViewItemClickLintemet(new RecyclerViewDataAdpater.OnRecyclerViewItemClickLintemet() {
@Override
public void onItemClick(int position) {

Toast.makeText(MainActivity.this,"这是第"+position+"条数据",Toast.LENGTH_SHORT).show();
}
});
//长按事件    调用接口方法
dataAdpater.setOnRecyclerViewLongClickLintement(new RecyclerViewDataAdpater.OnRecyclerViewLongClickLintement() {
@Override
public void onLongClick(int position) {
Toast.makeText(MainActivity.this,"这是第"+position+"条数据",Toast.LENGTH_SHORT).show();
list.remove(position);
//list集合数量减减
itemLong--;
dataAdpater.notifyItemRemoved(position- itemLong);

}
});

//设置适配器
idrecy.setAdapter(dataAdpater);

}
}

RecyclerViewDataAdpater：

package bawe.com.day_recyclerview_lianxi;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.TextView;import java.util.ArrayList;import java.util.List;/*** Created by 迷人的脚毛！！ on 2017/11/9.*/public class RecyclerViewDataAdpater extends RecyclerView.Adapter<RecyclerViewDataAdpater.ViewHolder>{//定义一个接口点击事件public interface OnRecyclerViewItemClickLintemet{void onItemClick(int position);}//定义接口对象         单击事件private OnRecyclerViewItemClickLintemet listener;//定义接口方法         单击事件public void setOnRecyclerViewItemClickLintemet(OnRecyclerViewItemClickLintemet listener){this.listener=listener;};//================================================================================================//定义一个接口的长按事件public interface OnRecyclerViewLongClickLintement{void onLongClick(int position);}//定义接口方法  长按事件private OnRecyclerViewLongClickLintement longistener;//定义接口方法    长按事件public void setOnRecyclerViewLongClickLintement(OnRecyclerViewLongClickLintement longistener){this.longistener=longistener;}//===================================================================================================//上下文对象private Context context;// List集合private List<User> list=new ArrayList<User>();public RecyclerViewDataAdpater(Context context, List<User> list) {this.context = context;this.list = list;}//创建ViewHolder的时候@Overridepublic ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {//查找布局xmlView view = View.inflate(context, R.layout.recyclerview_layout, null);ViewHolder viewHolder = new ViewHolder(view);return viewHolder;}//绑定ViewHolder，实际上是把视图和数据进行绑定@Overridepublic void onBindViewHolder(ViewHolder holder, final int position) {//条目单击事件holder.itemView.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View view) {listener.onItemClick(position);}});//条目长按事件holder.itemView.setOnLongClickListener(new View.OnLongClickListener() {@Overridepublic boolean onLongClick(View view) {longistener.onLongClick(position);return false;}});//给控件赋值数据holder.img.setImageResource(list.get(position).getImg());holder.text.setText(list.get(position).getName());}@Overridepublic int getItemCount() {return list.size();}//定义ViewHolderclass ViewHolder extends RecyclerView.ViewHolder{private ImageView img;private TextView text;public ViewHolder(View itemView) {super(itemView);//查找控件img= (ImageView)itemView.findViewById(R.id.img_tu);text=(TextView)itemView.findViewById(R.id.tv_text);}}}

compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'

  用接口回调的方法写了 Item的长按和短按的点击事件。