RecyclerView删除动画

package com.example.rapp1016;

import android.os.Handler;
import android.os.Message;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity {

    private RecyclerView recycler;
    private List<String>list= new ArrayList<>();
    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            if (msg.what == 0){
                adapterTwo.notifyDataSetChanged();
            }
        }
    };
    private MyAdapterTwo adapterTwo;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recycler = (RecyclerView) findViewById(R.id.recycler);
        //设置布局管理器
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);

        GridLayoutManager gridLayoutManager = new GridLayoutManager(this,2);

        StaggeredGridLayoutManager staggeredGridLayoutManager
                = new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL);

        recycler.setLayoutManager(staggeredGridLayoutManager);

        adapterTwo = new MyAdapterTwo(this,list);
        adapter = new MyAdapter();
        recycler.setAdapter(adapterTwo);


        //添加动画
        recycler.setItemAnimator(new DefaultItemAnimator());

        adapterTwo.setListener(new MyAdapterTwo.onClickItemListener() {
            @Override
            public void onItem(int position) {
                Toast.makeText(MainActivity.this,position+"===",Toast.LENGTH_SHORT).show();
                adapterTwo.removeData(position);
                handler.sendEmptyMessageDelayed(0,1000);
            }
        });

        for (int i = 0; i <100 ; i++) {
            list.add(i+"嘻嘻");
            list.add(i+"哈哈");
            list.add(i+"吼吼");
        }

    }

    private MyAdapter adapter;
    private class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder>{
        @NonNull
        @Override
        public MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

            View view = View.inflate(MainActivity.this, R.layout.item_layout, null);
            MyViewHolder holder =new MyViewHolder(view);
            holder.textView = view.findViewById(R.id.text_view);
            return holder;
        }

        @Override
        public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
                holder.textView.setText(position+"=================");
        }

        @Override
        public int getItemCount() {
            return 50;
        }

        public class MyViewHolder extends RecyclerView.ViewHolder{

            public MyViewHolder(View itemView) {
                super(itemView);

            }
            TextView textView;

        }
    }
}

package com.example.rapp1016;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RelativeLayout;
import android.widget.TextView;

import java.util.List;

public class MyAdapterTwo extends RecyclerView.Adapter<MyAdapterTwo.MyViewHolderTwo> {

    private Context context;
    private List<String> list;

    public MyAdapterTwo(Context context, List<String> list) {
        this.context = context;
        this.list = list;
    }

    @NonNull
    @Override
    public MyViewHolderTwo onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View inflate = View.inflate(context, R.layout.item_layout, null);
        MyViewHolderTwo holdertwo = new MyViewHolderTwo(inflate);
        holdertwo.textView = inflate.findViewById(R.id.text_view);
        holdertwo.relativeLayout = inflate.findViewById(R.id.relative);
        return holdertwo;
    }

    @Override
    public void onBindViewHolder(@NonNull MyViewHolderTwo holder, final int position) {
        holder.textView.setText(list.get(position));
        holder.relativeLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.onItem(position);
            }
        });
    }

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

    public class MyViewHolderTwo extends RecyclerView.ViewHolder{

        public MyViewHolderTwo(View itemView) {
            super(itemView);
        }
        TextView textView;
        RelativeLayout relativeLayout;
    }

    private onClickItemListener listener;

    public void setListener(onClickItemListener listener) {
        this.listener = listener;
    }

    public interface onClickItemListener{
        void onItem(int position);
    }

    public void removeData(int postion){
        list.remove(postion);
        notifyItemRemoved(postion);
    }
}