RecyclerView的点击、滑动、拖动事件

效果图：

在gradle里导包   implementation 'com.android.support:recyclerview-v7:28.0.0'

activity_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"    tools:context=".MainActivity">

    <android.support.v7.widget.RecyclerView        android:id="@+id/recyclerVirw"        android:layout_margin="10dp"        android:layout_width="match_parent"        android:layout_height="match_parent">    </android.support.v7.widget.RecyclerView>

</LinearLayout>

list_item

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_margin="20dp">

    <TextView        android:id="@+id/textview"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:textStyle="bold"        android:textSize="20sp"/></LinearLayout>

mAdapter

package com.example.admin.recyclerview;

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

import java.util.List;

public class mAdapter extends RecyclerView.Adapter<mAdapter.viewHolder> {    private List<Integer> item;    private Context context;    private onClick click;

    public mAdapter(Context context, List<Integer> item, onClick click){        this.context=context;        this.item=item;        this.click=click;    }

    @NonNull    @Override    public viewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {        Context mContext=viewGroup.getContext();        View view=LayoutInflater.from(mContext).inflate(R.layout.list_item,viewGroup,false);        viewHolder holder=new viewHolder(view);        return holder;    }

    @Override    public void onBindViewHolder(@NonNull viewHolder viewHolder, int i) {        String number=String.valueOf(item.get(i));        viewHolder.textView.setText(number);

    }

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

    public class viewHolder extends RecyclerView.ViewHolder{        public final TextView textView;

        public viewHolder(View view){            super(view);            textView=view.findViewById(R.id.textview);            textView.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    int position=getAdapterPosition();                    click.onItemClick(position);                }            });        }    }    public  interface onClick{      public  void  onItemClick(int position);    }}

MainActivity

package com.example.admin.recyclerview;

import android.support.annotation.NonNull;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.support.v7.widget.helper.ItemTouchHelper;import android.widget.Toast;

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

public class MainActivity extends AppCompatActivity implements mAdapter.onClick {    private List<Integer> item;

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

        item=new ArrayList<Integer>();        for (int i=1;i<10;i++){            item.add(new Integer(i));        }

        RecyclerView recyclerView=findViewById(R.id.recyclerVirw);        LinearLayoutManager linearLayoutManager=new LinearLayoutManager(this);        recyclerView.setLayoutManager(linearLayoutManager);

        final mAdapter adapter=new mAdapter(this,item,this);        recyclerView.setAdapter(adapter);

        new ItemTouchHelper(new ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP| ItemTouchHelper.DOWN,                ItemTouchHelper.LEFT|ItemTouchHelper.RIGHT) {            @Override            public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder viewHolder1) {                adapter.notifyItemMoved(viewHolder.getAdapterPosition(),viewHolder1.getAdapterPosition());                return true;            }

            @Override            public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int i) {              int position=viewHolder.getAdapterPosition();              item.remove(position);              adapter.notifyItemRemoved(position);

            }        }).attachToRecyclerView(recyclerView);

    }

    @Override    public void onItemClick(int position) {        String i=String.valueOf(position+1);        Toast.makeText(this,"The position is "+i,Toast.LENGTH_SHORT).show();    }}

github项目源码: https://github.com/NeoWu55/Android-RecyclerView