recycel

////action_main

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context="com.example.com.recycletwo.MainActivity">
    <Button
        android:onClick="additem"
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:text="添加"
        />
    <Button
        android:onClick="removeitem"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="移除"/>width="wrap_content"
        android:layout_
    <android.support.v7.widget.RecyclerView
        android:id="@+id/clv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />

</LinearLayout>

///////MainAction

package com.example.com.recycletwo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.View;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private View clv;
    private List<String> ll;
    private Myabapter myabapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        RecyclerView rcv = findViewById(R.id.clv);
        //rcv.setLayoutManager(new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false));
        rcv.setLayoutManager(new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL));
        //添加，删除，增加动画
        rcv.setItemAnimator(new DefaultItemAnimator());
       itimdate();
        myabapter = new Myabapter(ll);
        rcv.setAdapter(myabapter);
    }

    private void itimdate() {
        ll = new ArrayList<>();
        for (int x=0;x<40;x++){
            ll.add("这是条目"+x);
        }
    }

    public void additem(View view) {
        myabapter.add();
    }

    public void removeitem(View view) {
        myabapter.remove();
    }
}

///////适配器

package com.example.com.recycletwo;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

/**
 * Created by 丶未央 on 2018/3/26.
 */

public class Myabapter extends RecyclerView.Adapter{

    List<String> ll;
    public Myabapter(List<String> ll) {

        this.ll=ll;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = View.inflate(parent.getContext(), R.layout.actone, null);
        Myviewholder myviewholder = new Myviewholder(view);
        return myviewholder;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
              final Myviewholder myviewholder= (Myviewholder) holder;
               myviewholder.textone.setText(ll.get(position));
    }

    @Override
    public int getItemCount() {
        return ll.size();
    }

    class Myviewholder extends RecyclerView.ViewHolder{

        private final TextView textone;

        public Myviewholder(View itemView) {

            super(itemView);
            textone = itemView.findViewById(R.id.textone);
        }
    }
    //添加方法
    public void add(){
        ll.add(0,"这是新加的条目");
        notifyItemInserted(0);
    }
    //删除方法
    public void remove(){
        if(ll==null){
            return;
        }else{
           ll.remove(0);
           notifyItemRemoved(0);
        }
    }
}

最后在bulid gradle中导一个依赖

compile 'com.android.support:recyclerview-v7:26.1.0'//注意版本