仿购物车一级列表

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.bwie.goodcart1.MainActivity">    <android.support.v7.widget.RecyclerView        android:id="@+id/rv"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:layout_weight="1"/>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal"        android:background="#44eee2">        <CheckBox            android:id="@+id/cb"            android:layout_width="wrap_content"            android:layout_height="wrap_content" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="全选"            android:textSize="20sp"/>        <TextView            android:id="@+id/num"            android:layout_width="match_parent"            android:layout_height="match_parent"            android:text="结算"            android:textSize="20sp"            android:background="#99ee22"            android:gravity="center"            android:layout_marginLeft="200dp"/>    </LinearLayout></LinearLayout>

<?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="50dp"    android:orientation="horizontal">    <CheckBox        android:id="@+id/check"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:background="@mipmap/ic_launcher"/>    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginLeft="10dp"        android:layout_marginTop="10dp"        android:orientation="vertical">        <TextView            android:id="@+id/name"            android:layout_width="wrap_content"            android:layout_height="wrap_content" />        <TextView            android:id="@+id/price"            android:layout_width="wrap_content"            android:layout_height="wrap_content" />    </LinearLayout>    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="match_parent"        android:layout_marginTop="20dp"        android:layout_marginLeft="50dp"        android:orientation="horizontal">        <TextView            android:id="@+id/jian"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="-"            android:textSize="30dp"/>        <TextView            android:id="@+id/number"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="1"            android:paddingLeft="5dp"            android:textSize="20dp"/>        <TextView            android:id="@+id/jia"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="+"            android:paddingLeft="5dp"            android:textSize="25dp"/>    </LinearLayout></LinearLayout>
/** * Created by user on 2017/11/17.
 * 购物车接口 */public interface IShowCart {    public void check(int num);    public void allCheak(int num);    public void getPrice();}
/** * Created by user on 2017/11/17.
 * 展示数据的类 */public class GoodBean {    boolean check;    String name;    int price;    int num;    public GoodBean(int num, boolean check, String name, int price) {        this.num = num;        this.check = check;        this.name = name;        this.price = price;    }    public boolean isCheck() {        return check;    }    public void setCheck(boolean check) {        this.check = check;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getPrice() {        return price;    }    public void setPrice(int price) {        this.price = price;    }    public int getNum() {        return num;    }    public void setNum(int num) {        this.num = num;    }}
import android.content.Context;import android.support.v7.widget.RecyclerView;import android.view.View;import android.view.ViewGroup;import android.widget.CheckBox;import android.widget.TextView;import java.util.List;/** * Created by user on 2017/11/17.
 * 适配器 */public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {    List<GoodBean> list;    Context context;    IShowCart iShowCart;    int num;    public MyAdapter(List<GoodBean> list, Context context, IShowCart iShowCart) {        this.list = list;        this.context = context;        this.iShowCart = iShowCart;    }    @Override    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = View.inflate(context, R.layout.item, null);        return new ViewHolder(view);    }    @Override    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {        final GoodBean goodBean = list.get(position);        final ViewHolder viewHolder = (ViewHolder) holder;        viewHolder.check.setChecked(goodBean.isCheck());        viewHolder.name.setText(goodBean.getName());        viewHolder.price.setText(goodBean.getPrice()+"");        viewHolder.number.setText(goodBean.getNum()+"");        viewHolder.jia.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                goodBean.num++;                if (goodBean.isCheck()){                    iShowCart.getPrice();                }                notifyDataSetChanged();//刷新            }        });        viewHolder.jian.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if (goodBean.num>0){                    goodBean.num--;                    if (goodBean.isCheck()){                        iShowCart.getPrice();                    }                    notifyDataSetChanged();//刷新                }            }        });        viewHolder.check.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if (viewHolder.check.isChecked()){                    goodBean.setCheck(true);                    if (dellAll()){                        iShowCart.allCheak(num);                    } else {                        iShowCart.check(num);                    }                } else {                    goodBean.setCheck(false);                    iShowCart.check(num);                }            }        });    }    //按钮是否全选    public boolean dellAll(){        for (int i=0;i<list.size();i++){            if (!list.get(i).isCheck()){                return false;            }        }        return true;    }    class ViewHolder extends RecyclerView.ViewHolder{        CheckBox check;        TextView name;        TextView price;        TextView jian;        TextView number;        TextView jia;        public ViewHolder(View itemView) {            super(itemView);            check = (CheckBox) itemView.findViewById(R.id.check);            name = (TextView) itemView.findViewById(R.id.name);            price = (TextView) itemView.findViewById(R.id.price);            jian = (TextView) itemView.findViewById(R.id.jian);            number = (TextView) itemView.findViewById(R.id.number);            jia = (TextView) itemView.findViewById(R.id.jia);        }    }    @Override    public int getItemCount() {        return list.size();    }}
//展示购物车
import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.View;import android.widget.CheckBox;import android.widget.TextView;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private RecyclerView recyclerView;    private List<GoodBean> list = new ArrayList<>();    private RecyclerView mRv;    private CheckBox mCb;    /**     * 结算     */    private TextView mNum;    MyAdapter adapter;    int count;    int price;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();        //设置布局管理器        mRv.setLayoutManager(new LinearLayoutManager(this));        for (int i = 0; i < 20; i++) {            list.add(new GoodBean(1, false, "item" + 1, 11));        }        adapter = new MyAdapter(list, MainActivity.this, new IShowCart() {            @Override            public void check(int num) {                mCb.setChecked(false);                aGou();//判断购买的商品                mNum.setText("数量:"+count+" 价格:"+price);            }            @Override            public void allCheak(int num) {                mCb.setChecked(true);                aGou();//判断购买的商品                mNum.setText("数量:"+count+" 价格:"+price);            }            @Override            public void getPrice() {                aGou();//判断购买的商品                mNum.setText("数量:"+count+" 价格:"+price);            }        });        //设置适配器        mRv.setAdapter(adapter);        //全选按钮        mCb.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if (mCb.isChecked()){                    for (int i=0;i<list.size();i++){                        list.get(i).setCheck(true);                    }                    adapter.notifyDataSetChanged();                } else {                    for (int i=0;i<list.size();i++){                        list.get(i).setCheck(false);                    }                    adapter.notifyDataSetChanged();                }                aGou();                mNum.setText("数量:"+count+" 价格:"+price);            }        });    }    //判断有几件为勾选状态    private void aGou(){        count = 0;        price = 0;        for (int i=0;i<list.size();i++){            if (list.get(i).isCheck()){                count+=list.get(i).getNum();                price+=list.get(i).getPrice()+list.get(i).num;            }        }    }    private void initView() {        mRv = (RecyclerView) findViewById(R.id.rv);        mCb = (CheckBox) findViewById(R.id.cb);        mNum = (TextView) findViewById(R.id.num);    }}