购物车（死数据）（安卓）

最新推荐文章于 2023-01-03 23:11:13 发布

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最新推荐文章于 2023-01-03 23:11:13 发布

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分类专栏：购物车

本文链接：https://blog.youkuaiyun.com/qq_39937301/article/details/78333896

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在做购物车的时候：

快捷键的依赖：

ButterKnife（使用快捷键）
classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
apply plugin: 'android-apt'
compile 'com.jakewharton:butterknife:8.2.1'
apt 'com.jakewharton:butterknife-compiler:8.2.1'

在主文件中：

效果图为：

注意在xml中图片的路径：

在item_shopcart_group.xml中：

<?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:background="@color/white"
android:orientation="vertical" >

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/white" >

<CheckBox
android:id="@+id/determine_chekbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:layout_marginRight="4dp"
android:button="@drawable/check_box_bg"
android:checkMark="?android:attr/listChoiceIndicatorMultiple"
android:gravity="center"
android:minHeight="38dp"
android:minWidth="32dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:visibility="visible" />

<TextView
android:id="@+id/tv_source_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginBottom="10dp"
android:layout_marginTop="10dp"
android:layout_toRightOf="@id/determine_chekbox"
android:background="@android:color/white"
android:drawableLeft="@mipmap/shop_ico"
android:drawablePadding="10dp"
android:drawableRight="@mipmap/s_jr_ico"
android:text="第八号当铺"
android:textColor="@color/grey_color2"
android:textSize="@dimen/txt_14" />
<Button
android:id="@+id/tv_store_edtor"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:background="@null"
android:text="编辑"/>
</RelativeLayout>

</LinearLayout>

效果图为：

在item_shopcart_product.xml文件中：

<?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:orientation="vertical" >

<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#CCCCCC" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/page_backgroup"
android:orientation="horizontal" >

<CheckBox
android:id="@+id/check_box"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="10dp"
android:layout_marginRight="4dp"
android:button="@drawable/check_box_bg"
android:checkMark="?android:attr/listChoiceIndicatorMultiple"
android:gravity="center"
android:minHeight="64dp"
android:minWidth="32dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:visibility="visible" />

<ImageView
android:id="@+id/iv_adapter_list_pic"
android:layout_width="85dp"
android:layout_height="85dp"
android:layout_marginBottom="15dp"
android:layout_marginTop="13dp"
android:scaleType="centerCrop"
android:src="@drawable/goods1" />

<RelativeLayout
android:id="@+id/rl_no_edtor"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_marginLeft="13dp"
>

<TextView
android:id="@+id/tv_intro"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginRight="10dp"
android:layout_marginTop="20dp"
android:ellipsize="end"
android:maxLines="2"
android:text="第八号当铺美女一枚"
android:textColor="@color/grey_color1"
android:textSize="@dimen/txt_14" />
<TextView
android:id="@+id/tv_color_size"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="颜色：黑色；尺码：29"
android:textColor="@color/gray"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_marginBottom="20dp"
android:layout_alignParentStart="true">

<TextView
android:id="@+id/tv_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:singleLine="true"
android:text="￥ 308.00"
android:textColor="@color/orange_color"
android:textSize="@dimen/txt_14"
android:textStyle="bold" />

<TextView
android:id="@+id/tv_discount_price"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:layout_toRightOf="@+id/tv_price"
android:text=""
android:textColor="@color/gray"
android:textSize="@dimen/txt_10"
/>
<TextView
android:id="@+id/tv_buy_num"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_marginRight="20dp"
android:layout_alignParentRight="true"
android:text="X 1"
android:textColor="@color/gray"
android:textSize="@dimen/txt_10"
/>
</RelativeLayout>
</RelativeLayout>
<LinearLayout
android:id="@+id/ll_edtor"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="13dp"
android:visibility="gone"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical">
<LinearLayout
android:id="@+id/ll_change_num"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_centerVertical="true"
android:layout_marginTop="10dp"
android:orientation="horizontal" >

<TextView
android:id="@+id/tv_reduce"
android:layout_width="35dp"
android:layout_height="35dp"
android:background="@drawable/text_angle_gray"
android:gravity="center"
android:text="一"
android:textColor="@color/grey_color1"
android:textSize="@dimen/txt_12" />

<TextView
android:id="@+id/tv_num"
android:layout_width="35dp"
android:layout_height="35dp"
android:background="@drawable/text_angle"
android:gravity="center"
android:singleLine="true"
android:text="1"
android:textColor="@color/grey_color1"
android:textSize="@dimen/txt_12" />

<TextView
android:id="@+id/tv_add"
android:layout_width="35dp"
android:layout_height="35dp"
android:background="@drawable/text_angle_right"
android:gravity="center"
android:text="+"
android:textColor="@color/grey_color1"
android:textSize="@dimen/txt_12" />
</LinearLayout>
<TextView
android:id="@+id/tv_colorsize"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:text="颜色：黑色；尺码：29"
android:layout_gravity="left"
android:textColor="@color/gray"/>
</LinearLayout>

<TextView
android:id="@+id/tv_goods_delete"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="3"
android:text="删除"
android:background="@color/orange"
android:gravity="center"
android:layout_gravity="center"
android:textColor="@color/white"/>
</LinearLayout>
</LinearLayout>

</LinearLayout>

效果图为：

在主文件中：

public class Gouwuche extends Fragment implements ShopcartAdapter.CheckInterface,
        ShopcartAdapter.ModifyCountInterface, ShopcartAdapter.GroupEdtorListener {
    @BindView(R.id.back)
    ImageView back;
    @BindView(R.id.title)
    TextView title;
    @BindView(R.id.subtitle)
    TextView subtitle;
    @BindView(R.id.top_bar)
    LinearLayout topBar;
    @BindView(R.id.exListView)
    ExpandableListView exListView;
    @BindView(R.id.all_chekbox)
    CheckBox allChekbox;
    @BindView(R.id.tv_total_price)
    TextView tvTotalPrice;
    @BindView(R.id.tv_go_to_pay)
    TextView tvGoToPay;
    @BindView(R.id.ll_info)
    LinearLayout llInfo;
    @BindView(R.id.tv_share)
    TextView tvShare;
    @BindView(R.id.tv_save)
    TextView tvSave;
    @BindView(R.id.tv_delete)
    TextView tvDelete;
    @BindView(R.id.ll_shar)
    LinearLayout llShar;
    Unbinder unbinder;
    private Context context;
    private double totalPrice = 0.00;// 购买的商品总价
    private int totalCount = 0;// 购买的商品总数量
    private ShopcartAdapter selva;
    private List<StoreInfo> groups = new ArrayList<StoreInfo>();// 组元素数据列表
    private Map<String, List<GoodsInfo>> children = new HashMap<String, List<GoodsInfo>>();// 子元素数据列表
    private int flag = 0;

    @Override
    public void onActivityCreated(@Nullable Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);


    }

    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View v = View.inflate(getContext(), R.layout.gouwuche, null);
        unbinder = ButterKnife.bind(this, v);
        initDatas();
        initEvents();

        context=getActivity();
        return v;
    }
    private void initEvents() {
        selva = new ShopcartAdapter(groups, children, getActivity());
        selva.setCheckInterface(this);// 关键步骤1,设置复选框接口
        selva.setModifyCountInterface(this);// 关键步骤2,设置数量增减接口
        selva.setmListener(this);
        exListView.setAdapter(selva);
        for (int i = 0; i < selva.getGroupCount(); i++) {
            exListView.expandGroup(i);// 关键步骤3,初始化时，将ExpandableListView以展开的方式呈现
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        setCartNum();
    }

    /**
     * 设置购物车产品数量
     */
    private void setCartNum() {
        int count=0;
        for (int i = 0; i < groups.size(); i++) {
            groups.get(i).setChoosed(allChekbox.isChecked());
            StoreInfo group = groups.get(i);
            List<GoodsInfo> childs = children.get(group.getId());
            for (GoodsInfo goodsInfo:childs){
                count+=1;
            }
        }
        title.setText("购物车" + "(" + count + ")");
    }

    /**
     * 模拟数据<br>
     * 遵循适配器的数据列表填充原则，组元素被放在一个List中，对应的组元素下辖的子元素被放在Map中，<br>
     * 其键是组元素的Id(通常是一个唯一指定组元素身份的值)
     */
    private void initDatas() {
        for (int i = 0; i < 3; i++) {
            groups.add(new StoreInfo(i + "", "天猫店铺" + (i + 1) + "号店"));
            List<GoodsInfo> products = new ArrayList<GoodsInfo>();
            for (int j = 0; j <= i; j++) {
                int[]   img={R.drawable.goods1,R.drawable.goods2,R.drawable.goods3,R.drawable.goods4,R.drawable.goods5,R.drawable.goods6};
                products.add(new GoodsInfo(j + "", "商品", groups.get(i)
                        .getName() + "的第" + (j + 1) + "个商品", 12.00 + new Random().nextInt(23), new Random().nextInt(5) + 1, "豪华", "1", img[i*j],6.00+ new Random().nextInt(13)));
            }
            children.put(groups.get(i).getId(), products);// 将组元素的一个唯一值，这里取Id，作为子元素List的Key
        }

    }

    /**
     * 删除操作<br>
     * 1.不要边遍历边删除，容易出现数组越界的情况<br>
     * 2.现将要删除的对象放进相应的列表容器中，待遍历完后，以removeAll的方式进行删除
     */
    public void doDelete() {
        List<StoreInfo> toBeDeleteGroups = new ArrayList<StoreInfo>();// 待删除的组元素列表
        for (int i = 0; i < groups.size(); i++) {
            StoreInfo group = groups.get(i);
            if (group.isChoosed()) {
                toBeDeleteGroups.add(group);
            }
            List<GoodsInfo> toBeDeleteProducts = new ArrayList<GoodsInfo>();// 待删除的子元素列表
            List<GoodsInfo> childs = children.get(group.getId());
            for (int j = 0; j < childs.size(); j++) {
                if (childs.get(j).isChoosed()) {
                    toBeDeleteProducts.add(childs.get(j));
                }
            }
            childs.removeAll(toBeDeleteProducts);
        }
        groups.removeAll(toBeDeleteGroups);
        selva.notifyDataSetChanged();
        calculate();
    }

    @Override
    public void doIncrease(int groupPosition, int childPosition,
                           View showCountView, boolean isChecked) {
        GoodsInfo product = (GoodsInfo) selva.getChild(groupPosition,
                childPosition);
        int currentCount = product.getCount();
        currentCount++;
        product.setCount(currentCount);
        ((TextView) showCountView).setText(currentCount + "");
        selva.notifyDataSetChanged();
        calculate();
    }

    @Override
    public void doDecrease(int groupPosition, int childPosition,
                           View showCountView, boolean isChecked) {

        GoodsInfo product = (GoodsInfo) selva.getChild(groupPosition,
                childPosition);
        int currentCount = product.getCount();
        if (currentCount == 1)
            return;
        currentCount--;
        product.setCount(currentCount);
        ((TextView) showCountView).setText(currentCount + "");
        selva.notifyDataSetChanged();
        calculate();
    }

    @Override
    public void childDelete(int groupPosition, int childPosition) {
        children.get(groups.get(groupPosition).getId()).remove(childPosition);
        StoreInfo group = groups.get(groupPosition);
        List<GoodsInfo> childs = children.get(group.getId());
        if (childs.size() == 0) {
            groups.remove(groupPosition);
        }
        selva.notifyDataSetChanged();
        handler.sendEmptyMessage(0);
    }

    @Override
    public void checkGroup(int groupPosition, boolean isChecked) {
        StoreInfo group = groups.get(groupPosition);
        List<GoodsInfo> childs = children.get(group.getId());
        for (int i = 0; i < childs.size(); i++) {
            childs.get(i).setChoosed(isChecked);
        }
        if (isAllCheck())
            allChekbox.setChecked(true);
        else
            allChekbox.setChecked(false);
        selva.notifyDataSetChanged();
        calculate();
    }

    @Override
    public void checkChild(int groupPosition, int childPosiTion,
                           boolean isChecked) {
        boolean allChildSameState = true;// 判断改组下面的所有子元素是否是同一种状态
        StoreInfo group = groups.get(groupPosition);
        List<GoodsInfo> childs = children.get(group.getId());
        for (int i = 0; i < childs.size(); i++) {
            // 不全选中
            if (childs.get(i).isChoosed() != isChecked) {
                allChildSameState = false;
                break;
            }
        }
        //获取店铺选中商品的总金额
        if (allChildSameState) {
            group.setChoosed(isChecked);// 如果所有子元素状态相同，那么对应的组元素被设为这种统一状态
        } else {
            group.setChoosed(false);// 否则，组元素一律设置为未选中状态
        }

        if (isAllCheck()) {
            allChekbox.setChecked(true);// 全选
        } else {
            allChekbox.setChecked(false);// 反选
        }
        selva.notifyDataSetChanged();
        calculate();

    }

    private boolean isAllCheck() {

        for (StoreInfo group : groups) {
            if (!group.isChoosed())
                return false;

        }

        return true;
    }

    /**
     * 全选与反选
     */
    private void doCheckAll() {
        for (int i = 0; i < groups.size(); i++) {
            groups.get(i).setChoosed(allChekbox.isChecked());
            StoreInfo group = groups.get(i);
            List<GoodsInfo> childs = children.get(group.getId());
            for (int j = 0; j < childs.size(); j++) {
                childs.get(j).setChoosed(allChekbox.isChecked());
            }
        }
        selva.notifyDataSetChanged();
        calculate();
    }

    /**
     * 统计操作<br>
     * 1.先清空全局计数器<br>
     * 2.遍历所有子元素，只要是被选中状态的，就进行相关的计算操作<br>
     * 3.给底部的textView进行数据填充
     */
    private void calculate() {
        totalCount = 0;
        totalPrice = 0.00;
        for (int i = 0; i < groups.size(); i++) {
            StoreInfo group = groups.get(i);
            List<GoodsInfo> childs = children.get(group.getId());
            for (int j = 0; j < childs.size(); j++) {
                GoodsInfo product = childs.get(j);
                if (product.isChoosed()) {
                    totalCount++;
                    totalPrice += product.getPrice() * product.getCount();
                }
            }


        }
        tvTotalPrice.setText("￥" + totalPrice);
        tvGoToPay.setText("去支付(" + totalCount + ")");
    }

    @OnClick({R.id.all_chekbox, R.id.tv_delete, R.id.tv_go_to_pay, R.id.subtitle, R.id.tv_save, R.id.tv_share})
    public void onClick(View view) {
        AlertDialog alert;
        switch (view.getId()) {
            case R.id.all_chekbox:
                doCheckAll();
                break;
            case R.id.tv_delete:
                if (totalCount == 0) {
                    Toast.makeText(context, "请选择要移除的商品", Toast.LENGTH_LONG).show();
                    return;
                }
                alert = new AlertDialog.Builder(context).create();
                alert.setTitle("操作提示");
                alert.setMessage("您确定要将这些商品从购物车中移除吗？");
                alert.setButton(DialogInterface.BUTTON_NEGATIVE, "取消",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                return;
                            }
                        });
                alert.setButton(DialogInterface.BUTTON_POSITIVE, "确定",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                doDelete();
                            }
                        });
                alert.show();
                break;
            case R.id.tv_go_to_pay:
                if (totalCount == 0) {
                    Toast.makeText(context, "请选择要支付的商品", Toast.LENGTH_LONG).show();
                    return;
                }
                alert = new AlertDialog.Builder(context).create();
                alert.setTitle("操作提示");
                alert.setMessage("总计:\n" + totalCount + "种商品\n" + totalPrice + "元");
                alert.setButton(DialogInterface.BUTTON_NEGATIVE, "取消",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                return;
                            }
                        });
                alert.setButton(DialogInterface.BUTTON_POSITIVE, "确定",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                return;
                            }
                        });
                alert.show();
                break;
            case R.id.subtitle:
                if (flag == 0) {
                    llInfo.setVisibility(View.GONE);
                    tvGoToPay.setVisibility(View.GONE);
                    llShar.setVisibility(View.VISIBLE);
                    subtitle.setText("完成");
                } else if (flag == 1) {
                    llInfo.setVisibility(View.VISIBLE);
                    tvGoToPay.setVisibility(View.VISIBLE);
                    llShar.setVisibility(View.GONE);
                    subtitle.setText("编辑");
                }
                flag = (flag + 1) % 2;//其余得到循环执行上面2个不同的功能
                break;
            case R.id.tv_share:
                if (totalCount == 0) {
                    Toast.makeText(context, "请选择要分享的商品", Toast.LENGTH_LONG).show();
                    return;
                }
                Toast.makeText(getContext(), "分享成功", Toast.LENGTH_SHORT).show();
                break;
            case R.id.tv_save:
                if (totalCount == 0) {
                    Toast.makeText(context, "请选择要保存的商品", Toast.LENGTH_LONG).show();
                    return;
                }
                Toast.makeText(getContext(), "保存成功", Toast.LENGTH_SHORT).show();
                break;
        }
    }


    @Override
    public void groupEdit(int groupPosition) {
        groups.get(groupPosition).setIsEdtor(true);
        selva.notifyDataSetChanged();
    }
    Handler handler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            //删除购物车后动态改变数量
            setCartNum();
        }
    };
}