android 购物车

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这是效果图

上代码

主activity代码

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package activitytest.example.com.shopcar;import android.graphics.Color;import android.graphics.drawable.ColorDrawable;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.ImageView;import android.widget.TextView;import com.baoyz.swipemenulistview.SwipeMenu;import com.baoyz.swipemenulistview.SwipeMenuCreator;import com.baoyz.swipemenulistview.SwipeMenuItem;import com.baoyz.swipemenulistview.SwipeMenuListView;import java.math.BigDecimal;import java.util.ArrayList;public class MainActivity extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {    //    全选商品    private CheckBox mAllCkeck;    //    总价钱    private TextView mAllMoney;    private SwipeMenuListView mList;    private ArrayList<GoodBean> mData;    private MyAdapter mAdapter;    //总价    private double allMoney = 0;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mData = new ArrayList<>();//        初始化数据        for (int i = 0; i < 30; i++) {            mData.add(new GoodBean(false, R.mipmap.ic_launcher, "name" + (i + 1), "guige" + (i + 1), 5.21 + i, i + 1));        }        mAllCkeck = (CheckBox) findViewById(R.id.allCkeck);        mAllMoney = (TextView) findViewById(R.id.allMoney);        mList = (SwipeMenuListView) findViewById(R.id.allList);//        设置侧滑菜单        SwipeMenuCreator creator = new SwipeMenuCreator() {            @Override            public void create(SwipeMenu menu) {                SwipeMenuItem openItem = new SwipeMenuItem(                        getApplicationContext());// 设置菜单的背景                  openItem.setBackground(new ColorDrawable(Color.rgb(0xC9, 0xC9, 0xCE)));// 宽度  菜单的宽度是一定要有的，否则不显示菜单，笔者就吃了这样的亏                  openItem.setWidth(180);// 菜单标题                  openItem.setTitle("删除");// 标题大小                  openItem.setTitleSize(18);// 标题的颜色                  openItem.setTitleColor(Color.WHITE);// 添加到menu                  menu.addMenuItem(openItem);            }        };        mList.setMenuCreator(creator);        mAdapter = new MyAdapter();        mList.setAdapter(mAdapter);//        设置侧滑菜单点击事件        mList.setOnMenuItemClickListener(new SwipeMenuListView.OnMenuItemClickListener() {            @Override            public boolean onMenuItemClick(int position, SwipeMenu menu, int index) {//              点击后删除商品                mData.remove(position);//                删除商品后刷新数据                mAdapter.notifyDataSetChanged();                return false;            }        });        mAllCkeck.setOnCheckedChangeListener(this);        mAllMoney.setText("总价" + initNumber(allMoney));    }    //全选操作处理    @Override    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {        allMoney = 0;        if (isChecked) {//            全选后商品总价为每个商品价钱X每个商品个数的总和            for (int i = 0; i < mData.size(); i++) {                mData.get(i).setCheckState(true);//                计算总价                allMoney += (mData.get(i).getGoodPrice() * mData.get(i).getGoodNumber());            }        } else {//没有全选则总价为0            for (int i = 0; i < mData.size(); i++) {                mData.get(i).setCheckState(false);            }        }        mAllMoney.setText("总价" + initNumber(allMoney));        mAdapter.notifyDataSetChanged();    }    //适配器    class MyAdapter extends BaseAdapter {        @Override        public int getCount() {            return mData != null ? mData.size() : 0;        }        @Override        public Object getItem(int position) {            return mData.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(final int position, View convertView, ViewGroup parent) {            ViewHolder viewHolder;            if (convertView == null) {                viewHolder = new ViewHolder();                convertView = LayoutInflater.from(MainActivity.this).inflate(R.layout.shop_item, null, false);                viewHolder.mItemCheck = (ImageView) convertView.findViewById(R.id.itemCheck);                viewHolder.mItemImage = (ImageView) convertView.findViewById(R.id.itemImage);                viewHolder.mItemName = (TextView) convertView.findViewById(R.id.itemName);                viewHolder.mItemGuige = (TextView) convertView.findViewById(R.id.itemGuige);                viewHolder.mItemPrice = (TextView) convertView.findViewById(R.id.itemPrice);                viewHolder.mItemMove = (TextView) convertView.findViewById(R.id.itemMove);                viewHolder.mItemNumber = (TextView) convertView.findViewById(R.id.itemNumber);                viewHolder.mItemAdd = (TextView) convertView.findViewById(R.id.itemAdd);                convertView.setTag(viewHolder);            } else {                viewHolder = (ViewHolder) convertView.getTag();            }            viewHolder.mItemCheck.setImageResource(mData.get(position).isCheckState() ? R.mipmap.ic_checked : R.mipmap.ic_uncheck);            viewHolder.mItemImage.setImageResource(mData.get(position).getImageId());            viewHolder.mItemName.setText(mData.get(position).getGoodName());            viewHolder.mItemGuige.setText(mData.get(position).getGoodGuige());            viewHolder.mItemPrice.setText(mData.get(position).getGoodPrice() + "元");            viewHolder.mItemNumber.setText(mData.get(position).getGoodNumber() + "");//处理item 的选中和未选中            viewHolder.mItemCheck.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    if (mData.get(position).isCheckState()) {                        //                 由选中变成未选中   从总价中减去价格                        mData.get(position).setCheckState(false);                        allMoney -= (mData.get(position).getGoodPrice() * mData.get(position).getGoodNumber());                    } else {//                        由未选中变成选中   总价中加上价格                        mData.get(position).setCheckState(true);                        allMoney += (mData.get(position).getGoodPrice() * mData.get(position).getGoodNumber());                    }                    mAllMoney.setText("总价" + initNumber(allMoney));                    mAdapter.notifyDataSetChanged();                }            });//            处理添加个数            viewHolder.mItemAdd.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {//                    如果选中  增加后要增加总价钱                    if (mData.get(position).isCheckState()) {                        allMoney += mData.get(position).getGoodPrice();                        mAllMoney.setText("总价" + initNumber(allMoney));                    }                    mData.get(position).setGoodNumber(mData.get(position).getGoodNumber() + 1);                    mAdapter.notifyDataSetChanged();                }            });//            处理减少个数            viewHolder.mItemMove.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {//                    如果选中  减少后要减少总价格                    if (mData.get(position).isCheckState()) {                        allMoney -= mData.get(position).getGoodPrice();                        mAllMoney.setText("总价" + initNumber(allMoney));                    }                    if (mData.get(position).getGoodNumber() - 1 > 0) {                        mData.get(position).setGoodNumber(mData.get(position).getGoodNumber() - 1);                    } else {                        mData.remove(position);                    }                    mAdapter.notifyDataSetChanged();                }            });            return convertView;        }        class ViewHolder {            ImageView mItemCheck;            ImageView mItemImage;            TextView mItemName;            TextView mItemGuige;            TextView mItemPrice;            TextView mItemMove;            TextView mItemNumber;            TextView mItemAdd;        }    }    //处理double数据  四舍五入保留两位小数    public static double initNumber(double oldNum) {        return new BigDecimal(oldNum).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();    }}

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这是主activity的布局

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<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="activitytest.example.com.shopcar.MainActivity">    <com.baoyz.swipemenulistview.SwipeMenuListView        android:id="@+id/allList"        android:layout_width="match_parent"        android:layout_height="match_parent">    </com.baoyz.swipemenulistview.SwipeMenuListView>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="70dp"        android:layout_alignParentBottom="true"        android:background="#808080"        android:gravity="center_vertical"        android:orientation="horizontal">        <CheckBox            android:id="@+id/allCkeck"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerVertical="true"            android:text="全选" />        <TextView            android:id="@+id/allMoney"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="总价：" />    </LinearLayout></RelativeLayout>

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这是数据JavaBean

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package activitytest.example.com.shopcar;import java.math.BigDecimal;/** * Created by 金金 on 2016/12/13. */public class GoodBean {    private boolean checkState;    private int imageId;    private String goodName;    private String goodGuige;    private double goodPrice;    private int goodNumber;    public boolean isCheckState() {        return checkState;    }    public void setCheckState(boolean checkState) {        this.checkState = checkState;    }    public int getImageId() {        return imageId;    }    public void setImageId(int imageId) {        this.imageId = imageId;    }    public String getGoodName() {        return goodName;    }    public void setGoodName(String goodName) {        this.goodName = goodName;    }    public String getGoodGuige() {        return goodGuige;    }    public void setGoodGuige(String goodGuige) {        this.goodGuige = goodGuige;    }    public double getGoodPrice() {        return goodPrice;    }    public void setGoodPrice(double goodPrice) {        this.goodPrice = new BigDecimal(goodPrice).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();    }    public int getGoodNumber() {        return goodNumber;    }    public void setGoodNumber(int goodNumber) {        this.goodNumber = goodNumber;    }    public GoodBean(boolean checkState, int imageId, String goodName, String goodGuige, double goodPrice, int goodNumber) {        this.checkState = checkState;        this.imageId = imageId;        this.goodName = goodName;        this.goodGuige = goodGuige;        this.goodPrice = new BigDecimal(goodPrice).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();        this.goodNumber = goodNumber;    }}

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这是ListView 的item布局

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<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="100dp"    android:background="#8a8a8a"    android:padding="8dp">    <ImageView        android:id="@+id/itemCheck"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_centerVertical="true"        android:src="@mipmap/ic_uncheck" />    <ImageView        android:id="@+id/itemImage"        android:layout_width="80dp"        android:layout_height="80dp"        android:layout_toRightOf="@+id/itemCheck"        android:src="@mipmap/ic_launcher" />    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="match_parent"        android:layout_centerVertical="true"        android:layout_toRightOf="@+id/itemImage"        android:orientation="vertical"        android:weightSum="3">        <TextView            android:id="@+id/itemName"            android:layout_width="wrap_content"            android:layout_height="0dp"            android:layout_weight="1"            android:text="商品名" />        <TextView            android:id="@+id/itemGuige"            android:layout_width="wrap_content"            android:layout_height="0dp"            android:layout_weight="1"            android:text="商品规格" />        <TextView            android:id="@+id/itemPrice"            android:layout_width="wrap_content"            android:layout_height="0dp"            android:layout_weight="1"            android:text="商品价格" />    </LinearLayout>    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_alignParentRight="true">        <TextView            android:id="@+id/itemMove"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:background="@mipmap/ic_move" />        <TextView            android:id="@+id/itemNumber"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="100" />        <TextView            android:id="@+id/itemAdd"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:background="@mipmap/ic_add" />    </LinearLayout></RelativeLayout>

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剩下的就是些图片了

SwipeMenuListView开源项目地址

https://github.com/baoyongzhang/SwipeMenuListView

源码在这

http://download.csdn.net/detail/rosener/9710694

完了

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