recycleview三种布局+长按删除

主页面

package com.example.rk_recycleview;

import android.annotation.SuppressLint;
import android.content.DialogInterface;
import android.os.Message;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Handler;
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.widget.Toast;

import com.google.gson.Gson;

import java.io.IOException;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private static final int SUCCESS = 492;
    private View ll;
    private View bg;
    private View pb;
    private MyAdapter adapter;
    private List<SuperClass.DataBean> list;

    @SuppressLint("HandlerLeak")
            //使用handler进行gson解析
    Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            String json = (String) msg.obj;
            Gson gson = new Gson();
            SuperClass superClass = gson.fromJson(json, SuperClass.class);
            list = superClass.getData();
            adapter = new MyAdapter(list,MainActivity.this);
            rv.setAdapter(adapter);
        }
    };
    private RecyclerView rv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化
        initView();
    }

    private void initView() {
        ll = findViewById(R.id.ll);
        bg = findViewById(R.id.bg);
        pb = findViewById(R.id.pb);
        rv = findViewById(R.id.rv);
        ll.setOnClickListener(this);
        bg.setOnClickListener(this);
        pb.setOnClickListener(this);

        //长按删除
        rv.addOnItemTouchListener(new RecyclerViewClickListener(this, new RecyclerViewClickListener.OnItemClickListener() {
            @Override
            public void onItemClick(View view, final int position) {
                //设置提示框
                AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
                //提示内容
                builder.setMessage("是否删除?");
                //提示头
                builder.setTitle("提示");
                //确定按钮
                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        //吐司
                        Toast.makeText(MainActivity.this,"已删除",Toast.LENGTH_SHORT).show();
                        //关闭弹框
                        dialog.dismiss();
                        //删除
                        list.remove(position);
                        //刷新适配器
                        adapter.notifyDataSetChanged();
                    }
                });
                //取消按钮
                builder.setNegativeButton("取消",null);
                //执行展示
                builder.create().show();

            }

            @Override
            public void onItemLongClick(View view, final int position) {

            }
        }));

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.ll:
                getpost();
                //线性布局
                rv.setLayoutManager(new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false));
                break;
            case R.id.bg:
                //表格布局
                rv.setLayoutManager(new GridLayoutManager(this,3));
                break;
            case R.id.pb:
                //瀑布式布局
                rv.setLayoutManager(new StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL));
                break;
        }
    }

    //post解析
    public void getpost() {
        OkHttpClient client = new OkHttpClient();
        Request builder = new Request.Builder()
                .url("https://www.zhaoapi.cn/product/getCatagory")
                .build();
        client.newCall(builder).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {

            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String string = response.body().string();
                Message message = handler.obtainMessage();
                message.obj = string;
                message.what = SUCCESS;
                handler.sendMessage(message);
            }
        });
        return ;
    }
    //长按删除
    public void getselect() {
        return ;
    }
}

适配器

package com.example.rk_recycleview;

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

import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.List;

/**
 * data:2018/05/24.
 * author : 殷成龙(Administrator)
 * function :
 */

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
    private List<SuperClass.DataBean> list;
    private Context context;

    public MyAdapter(List<SuperClass.DataBean> list, Context context) {
        this.list = list;
        this.context = context;
    }

    //获取条目布局
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view =  LayoutInflater.from(parent.getContext()).inflate(R.layout.item,parent,false);
        ViewHolder viewHolder = new ViewHolder(view);
        return viewHolder;
    }

    //给控件赋值
    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.tv.setText(list.get(position).getName());
        ImageLoader.getInstance().displayImage(list.get(position).getIcon(),holder.img);
    }

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

    //ViewHolder
    public class ViewHolder extends RecyclerView.ViewHolder{
        private final ImageView img;
        private final TextView tv;
        public ViewHolder(View itemView) {
            super(itemView);
            img = itemView.findViewById(R.id.img);
            tv = itemView.findViewById(R.id.tv);
        }
    }

}

方法工具类

package com.example.rk_recycleview;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.widget.AdapterView;

public class RecyclerViewClickListener implements RecyclerView.OnItemTouchListener {

    private int mLastDownX, mLastDownY;
    //该值记录了最小滑动距离
    private int touchSlop;
    private OnItemClickListener mListener;
    //是否是单击事件
    private boolean isSingleTapUp = false;
    //是否是长按事件
    private boolean isLongPressUp = false;
    private boolean isMove = false;
    private long mDownTime;


    //内部接口，定义点击方法以及长按方法
    public interface OnItemClickListener {
        void onItemClick(View view, int position);


        void onItemLongClick(View view, int position);
    }


    public RecyclerViewClickListener(Context context, OnItemClickListener listener) {
        touchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
        mListener = listener;
    }

    @Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
        int x = (int) e.getX();
        int y = (int) e.getY();
        switch (e.getAction()) {
            /**
             *  如果是ACTION_DOWN事件，那么记录当前按下的位置，
             *  记录当前的系统时间。
             */
            case MotionEvent.ACTION_DOWN:
                mLastDownX = x;
                mLastDownY = y;
                mDownTime = System.currentTimeMillis();
                isMove = false;
                break;
            /**
             *  如果是ACTION_MOVE事件，此时根据TouchSlop判断用户在按下的时候是否滑动了，
             *  如果滑动了，那么接下来将不处理点击事件
             */
            case MotionEvent.ACTION_MOVE:
                if (Math.abs(x - mLastDownX) > touchSlop || Math.abs(y - mLastDownY) > touchSlop) {
                    isMove = true;
                }
                break;
            /**
             *  如果是ACTION_UP事件，那么根据isMove标志位来判断是否需要处理点击事件；
             *  根据系统时间的差值来判断是哪种事件，如果按下事件超过1ms，则认为是长按事件，
             *  否则是单击事件。
             */
            case MotionEvent.ACTION_UP:
                if (isMove) {
                    break;
                }
                if (System.currentTimeMillis() - mDownTime > 1000) {
                    isLongPressUp = true;
                } else {
                    isSingleTapUp = true;
                }
                break;
        }
        if (isSingleTapUp) {
            //根据触摸坐标来获取childView
            View childView = rv.findChildViewUnder(e.getX(), e.getY());
            isSingleTapUp = false;
            if (childView != null) {
                //回调mListener#onItemClick方法
                mListener.onItemClick(childView, rv.getChildLayoutPosition(childView));
                return true;
            }
            return false;
        }
        if (isLongPressUp) {
            View childView = rv.findChildViewUnder(e.getX(), e.getY());
            isLongPressUp = false;
            if (childView != null) {
                mListener.onItemLongClick(childView, rv.getChildLayoutPosition(childView));
                return true;
            }
            return false;
        }
        return false;
    }


    @Override
    public void onTouchEvent(RecyclerView rv, MotionEvent e) {


    }


    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {


    }
}

图片工具类

package com.example.rk_recycleview;

import android.app.Application;
import android.os.Environment;

import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiskCache;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.display.RoundedBitmapDisplayer;

import java.io.File;

/**
 * data:2018/05/21.
 * author : 殷成龙(Administrator)
 * function :图片工具类
 */

public class App extends Application {
    @Override
    public void onCreate() {
        super.onCreate();

        File file = new File(Environment.getExternalStorageDirectory() + "/" + "image");
        ImageLoaderConfiguration build = new ImageLoaderConfiguration.Builder(this)
                //设置缓存地址
                .diskCache(new UnlimitedDiskCache(file))
                //关联getimg
                .defaultDisplayImageOptions(getimg())
                //内存缓存20M
                .memoryCacheSize(2 * 1024 * 1024)
                //可以缓存文件数量
                .diskCacheFileCount(100)
                //线程池数量
                .threadPoolSize(3)
                .build();
        ImageLoader.getInstance().init(build);
    }

    public DisplayImageOptions getimg() {
        DisplayImageOptions img = new DisplayImageOptions.Builder()
                //加载时显示的图片
                .showImageOnLoading(R.mipmap.ic_launcher)
                .showImageOnFail(R.mipmap.ic_launcher)
                .showImageForEmptyUri(R.mipmap.ic_launcher)
                //设置圆角
                .displayer(new RoundedBitmapDisplayer(25))
                .build();
        return img;
    }
}

数据

package com.example.rk_recycleview;

import java.util.List;

/**
 * data:2018/05/24.
 * author : 殷成龙(Administrator)
 * function :
 */

public class SuperClass {

    /**
     * msg :
     * code : 0
     * data : [{"cid":1,"createtime":"2017-10-10T19:41:39","icon":"http://120.27.23.105/images/category/shop.png","ishome":1,"name":"京东超市"},{"cid":2,"createtime":"2017-10-10T19:41:39","icon":"http://120.27.23.105/images/category/qqg.png","ishome":1,"name":"全球购"},{"cid":3,"createtime":"2017-10-10T19:45:11","icon":"http://120.27.23.105/images/category/phone.png","ishome":1,"name":"手机数码"},{"cid":5,"createtime":"2017-10-10T20:12:03","icon":"http://120.27.23.105/images/category/man.png","ishome":1,"name":"男装"},{"cid":6,"createtime":"2017-10-10T20:12:03","icon":"http://120.27.23.105/images/category/girl.png","ishome":1,"name":"女装"},{"cid":7,"createtime":"2017-10-10T20:12:03","icon":"http://120.27.23.105/images/category/manshoe.png","ishome":1,"name":"男鞋"},{"cid":8,"createtime":"2017-10-10T20:12:03","icon":"http://120.27.23.105/images/category/girlshoe.png","ishome":1,"name":"女鞋"},{"cid":9,"createtime":"2017-10-10T20:12:03","icon":"http://120.27.23.105/images/category/shirt.png","ishome":1,"name":"内衣配饰"},{"cid":10,"createtime":"2017-10-10T20:12:03","icon":"http://120.27.23.105/images/category/bag.png","ishome":1,"name":"箱包手袋"},{"cid":11,"createtime":"2017-10-10T20:12:03","icon":"http://120.27.23.105/images/category/beauty.png","ishome":1,"name":"美妆个护"},{"cid":12,"createtime":"2017-10-10T20:12:03","icon":"http://120.27.23.105/images/category/jewel.png","ishome":1,"name":"钟表珠宝"},{"cid":13,"createtime":"2017-10-10T20:12:03","icon":"http://120.27.23.105/images/category/luxury.png","ishome":1,"name":"奢侈品"},{"cid":14,"createtime":"2017-10-10T20:12:03","icon":"http://120.27.23.105/images/category/computer.png","ishome":1,"name":"电脑办公"},{"cid":15,"createtime":"2017-09-29T10:13:48","icon":"http://120.27.23.105/images/icon.png","ishome":0,"name":"家用电器"},{"cid":16,"createtime":"2017-09-29T10:13:48","icon":"http://120.27.23.105/images/icon.png","ishome":0,"name":"食品生鲜"},{"cid":17,"createtime":"2017-09-29T10:13:48","icon":"http://120.27.23.105/images/icon.png","ishome":0,"name":"酒水饮料"},{"cid":18,"createtime":"2017-09-29T10:13:48","icon":"http://120.27.23.105/images/icon.png","ishome":0,"name":"母婴童装"},{"cid":19,"createtime":"2017-09-29T10:13:48","icon":"http://120.27.23.105/images/icon.png","ishome":0,"name":"玩具乐器"},{"cid":20,"createtime":"2017-09-29T10:13:48","icon":"http://120.27.23.105/images/icon.png","ishome":0,"name":"医药保健"}]
     */

    private String msg;
    private String code;
    private List<DataBean> data;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public List<DataBean> getData() {
        return data;
    }

    public void setData(List<DataBean> data) {
        this.data = data;
    }

    public static class DataBean {
        /**
         * cid : 1
         * createtime : 2017-10-10T19:41:39
         * icon : http://120.27.23.105/images/category/shop.png
         * ishome : 1
         * name : 京东超市
         */

        private int cid;
        private String createtime;
        private String icon;
        private int ishome;
        private String name;

        public int getCid() {
            return cid;
        }

        public void setCid(int cid) {
            this.cid = cid;
        }

        public String getCreatetime() {
            return createtime;
        }

        public void setCreatetime(String createtime) {
            this.createtime = createtime;
        }

        public String getIcon() {
            return icon;
        }

        public void setIcon(String icon) {
            this.icon = icon;
        }

        public int getIshome() {
            return ishome;
        }

        public void setIshome(int ishome) {
            this.ishome = ishome;
        }

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }
    }
}

主页面布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:orientation="vertical"
    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="com.example.rk_recycleview.MainActivity">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="线性布局"
            android:id="@+id/ll"/>

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="表格布局"
            android:id="@+id/bg"/>

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="瀑布流"
            android:id="@+id/pb"/>
    </LinearLayout>
<android.support.v7.widget.RecyclerView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/rv"/>
</LinearLayout>

控件布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:orientation="vertical"
    android:layout_gravity="center"
    android:gravity="center"
    android:layout_marginLeft="30dp"
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content"
    android:layout_height="wrap_content">
<ImageView
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:id="@+id/img"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tv"/>
</LinearLayout>

依赖

implementation 'com.android.support:recyclerview-v7:26.1.0'
compile 'com.squareup.okhttp3:okhttp:3.4.2'
implementation files('libs/gson-2.8.0.jar')
implementation files('libs/universal-image-loader-1.9.5.jar')

清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.rk_recycleview">
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <application
        android:name=".App"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>