完美购物车

最新推荐文章于 2021-06-07 11:35:54 发布

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最新推荐文章于 2021-06-07 11:35:54 发布

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分类专栏：购物车，二级列表文章标签：购物车二级列表

本文链接：https://blog.youkuaiyun.com/qq_39937301/article/details/78591908

购物车，二级列表专栏收录该内容

1 篇文章

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本文详细介绍了一个基于Android平台的购物车功能实现过程，包括布局设计、使用MVP模式进行开发、自定义视图组件以及实现增删操作等核心功能。

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在做购物车的时候，我觉得是先布好局，当然了，我是用二级列表做的

activity_main.xml中的总布局：

<!--头布局-->
<LinearLayout
    android:id="@+id/top_bar"
    android:layout_width="match_parent"
    android:layout_height="48dp"
    android:background="#f7f7f7"
    android:orientation="vertical" >

   <RelativeLayout
       android:layout_width="match_parent"
       android:layout_height="48dp"
       android:background="@android:color/transparent"
       android:orientation="vertical" >

      <ImageView
          android:id="@+id/back"
          android:layout_width="48dp"
          android:layout_height="48dp"
          android:layout_alignParentLeft="true"
          android:layout_gravity="center_vertical"
          android:padding="12dp"
          android:src="@drawable/back" />

      <TextView
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:gravity="center"
          android:minHeight="48dp"
          android:text="购物车"
          android:textColor="#1a1a1a"
          android:textSize="16sp" />

      <TextView
          android:id="@+id/edit"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_alignParentRight="true"
          android:layout_marginRight="40dp"
          android:gravity="center"
          android:minHeight="48dp"
          android:text="编辑"
          android:textColor="#1a1a1a"
          android:textSize="14sp"
          android:visibility="visible" />
   </RelativeLayout>
</LinearLayout>

<ExpandableListView
    android:id="@+id/exListView"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    android:childIndicator="@null"
    android:groupIndicator="@null" >
</ExpandableListView>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:gravity="center_vertical"
    android:orientation="horizontal" >

   <CheckBox
       android:id="@+id/all_chekbox"
       android:layout_marginLeft="20dp"
       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"/>
   <LinearLayout
       android:id="@+id/ll_info"
       android:layout_width="0dp"
       android:layout_height="wrap_content"
       android:layout_weight="4"
       >
      <LinearLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:orientation="vertical"
          android:layout_marginRight="20dp"
          android:layout_weight="1"
          >
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="horizontal"
             android:gravity="right"
             >
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginLeft="5dp"
                android:text="合计:"
                android:textSize="18sp"
                android:textStyle="bold" />

            <TextView
                android:id="@+id/total_price"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="￥0.00"
                android:textColor="#f23232"
                android:textSize="16sp"
                android:textStyle="bold" />
         </LinearLayout>
         <TextView
             android:id="@+id/total_number"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:text="共有商品:0件"
             android:gravity="right"
             android:textSize="16sp"
             android:textStyle="bold" />
      </LinearLayout>
      <TextView
          android:id="@+id/tv_go_to_pay"
          android:layout_width="match_parent"
          android:layout_height="match_parent"
          android:layout_weight="3"
          android:background="#fd7a05"
          android:clickable="true"
          android:gravity="center"
          android:text="结算"
          android:textColor="#FAFAFA"

          />
   </LinearLayout>

</LinearLayout>

group的布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#cfc3c3"
    android:orientation="horizontal">

    <CheckBox
        android:id="@+id/group_checkbox"
        android:layout_marginLeft="20dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:focusable="false"/>

    <TextView
        android:id="@+id/shop_name"
        android:layout_marginLeft="20dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="16dp" />

</LinearLayout>
child的布局（里面有删除的自定义View）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="230dp"
    android:orientation="horizontal">

    <CheckBox
        android:id="@+id/child_checkbox"
        android:layout_marginTop="50dp"
        android:layout_marginLeft="20dp"
        android:layout_marginBottom="50dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />

    <RelativeLayout
        android:layout_marginLeft="20dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/shop_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_marginLeft="17dp"
            android:layout_marginStart="17dp"
            android:text="TextView"
            android:layout_alignParentTop="true" />

        <ImageView
            android:id="@+id/shop_img"
            android:layout_width="90dp"
            android:layout_height="90dp"
            android:layout_marginTop="30dp"
            app:srcCompat="@mipmap/ic_launcher"
            android:layout_below="@+id/shop_name"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true" />

        <TextView
            android:id="@+id/shop_price"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignTop="@+id/shop_img"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="10dp"
            android:text="￥20"
            android:textColor="#f23232"/>

        <dongzhou.bwie.com.shopcartactivity.AddDeleteView
            android:id="@+id/adv"
            android:layout_width="160dp"
            android:layout_height="30dp"
            android:layout_below="@+id/shop_price"
            android:layout_marginTop="30dp"
            android:layout_marginLeft="140dp"
            app:left_text="-"
            app:right_text="+"
            app:middle_text="1"
            android:focusable="false"
            >

        </dongzhou.bwie.com.shopcartactivity.AddDeleteView>

        <Button
            android:id="@+id/shop_delete"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentEnd="true"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:visibility="invisible"
            android:text="删除" />
    </RelativeLayout>


</LinearLayout>
删除的布局：
?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="match_parent"
    android:orientation="horizontal"
    android:weightSum="1">

    <TextView
        android:id="@+id/txt_delete"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:text="-"
        android:gravity="center"
        android:background="#8b948b"/>

    <EditText
        android:id="@+id/et_number"
        android:layout_marginTop="2dp"
        android:layout_width="50dp"
        android:layout_height="30dp"
        android:background="@drawable/edit"
        android:layout_weight="0.00"
        android:gravity="center"
        android:text="1"/>
    <TextView
        android:id="@+id/txt_add"
        android:layout_width="30dp"
        android:layout_height="30dp"
        android:text="+"
        android:gravity="center"
        android:background="#8b948b"/>


</LinearLayout>
做完了布局，我们就开始做正事吧（MVP）
M层
GsonUtils
public class GsonUtils {
        private static Gson gson;
        public static Gson getInstance(){
            if(gson==null){
                gson=new Gson();
            }
            return gson;
        }
    }
HttpUtils
public class HttpUtils {
        private static final String TAG = "HttpUtils";
        private static volatile HttpUtils instance;

        Handler handler=new Handler();

        public HttpUtils() {
        }

        public static HttpUtils getInstance(){
            if(null==instance){
                synchronized (HttpUtils.class){
                    if(instance==null){
                        instance = new HttpUtils();
                    }
                }
            }
            return instance;
        }

        public void get(String url, Map<String,String> map, 
final CallBack callBack, final Class cla, final String tag){

            if(TextUtils.isEmpty(url)){
                return;
            }

            StringBuffer sb=new StringBuffer();
            sb.append(url);

            if(!map.isEmpty()){
                Log.i(TAG, "get: url="+"开始拼接+++++++++++++++++");
                if(url.contains("?")){
                    if(url.indexOf("?")==url.length()-1){
                    }else {
                        sb.append("&");
                    }
                }else {
                    sb.append("?");
                }

                for (Map.Entry<String,String> entry:map.entrySet()){
                    sb.append(entry.getKey())
                            .append("=")
                            .append(entry.getValue())
                            .append("&");
                }

                if(sb.indexOf("&")!=-1){
                    sb.deleteCharAt(sb.lastIndexOf("&"));
                }
            }



            Log.i(TAG, "get: url="+sb);

            OkHttpClient client=new OkHttpClient.Builder().
                    addInterceptor(new Logger()).build()
                    ;

            final Request request=new Request.Builder()
                    .get()
                    .url(sb.toString())
                    .build();

            Call call = client.newCall(request);

            call.enqueue(new Callback() {
                @Override
                public void onFailure(Call call, final IOException e) {
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            callBack.onFailed(tag,e);
                        }
                    });
                }

                @Override
                public void onResponse(Call call, Response response) throws IOException {
                    final String result = response.body().string();
                    Log.e(TAG, "onResponse: result--"+result);
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            Object o;
                            if (TextUtils.isEmpty(result)) {
                                o = null;
                            } else {
                                o = GsonUtils.getInstance().fromJson(result, cla);
                            }
                            //Log.e(TAG, "onResponse: bean--"+);
                            callBack.onSuccess(tag, o);
                        }
                    });
                }
            });

        }

    }
Logger
public class Logger implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        Request original = chain.request();
        HttpUrl url=original.url().newBuilder()
                .addQueryParameter("source","android")
                .build();
        //添加请求头
        Request request = original.newBuilder()
                .url(url)
                .build();
        return chain.proceed(request);
    }
}
接口
ImView
public interface ImView {
    void onSuccess(String tag, Object o);
    void onFailed(String tag, Exception e);
}
CallBack
public interface CallBack {
    void onSuccess(String tag, Object o);
    void onFailed(String tag, Exception e);
}
P层
public class Presenter {

    private ImView inv;
    public void attachView(ImView inv){
        this.inv=inv;
    }

    public void get(String url, Map<String,String>map,String tag,Class clv){
        HttpUtils.getInstance().get(url, map, new CallBack() {
            @Override
            public void onSuccess(String tag, Object o) {
                if(o!=null){
                    inv.onSuccess(tag,o);
                }
            }

            @Override
            public void onFailed(String tag, Exception e) {
                    inv.onFailed(tag,e);
            }
        },clv,tag);
    }

    public void deleteView(){
        if(inv!=null){
            inv=null;
        }
    }
}
当然了，不要忘记适配器
public class ExpandableAdapter extends BaseExpandableListAdapter{

   // private static final String TAG = "ExpandableAdapter二级列表适配器";

    private Context context;
    private List<GroupBean> groupBeen=new ArrayList<>();
    private List<List<ChildBean>> childBeen=new ArrayList<>();

    public ExpandableAdapter(Context context, List<GroupBean> groupBeen, List<List<ChildBean>> childBeen) {
        this.context = context;
        this.groupBeen = groupBeen;
        this.childBeen = childBeen;
    }

    @Override
    public int getGroupCount() {
        return groupBeen.size();
    }

    @Override
    public int getChildrenCount(int i) {
        return childBeen.get(i).size();
    }

    @Override
    public Object getGroup(int i) {
        return groupBeen.get(i).getSellerName();
    }

    @Override
    public Object getChild(int i, int i1) {
        return childBeen.get(i).get(i1).getTitle();
    }

    @Override
    public long getGroupId(int i) {
        return i;
    }

    @Override
    public long getChildId(int i, int i1) {
        return i1;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    //一级组
    @Override
    public View getGroupView(final int i, boolean b, View view, ViewGroup viewGroup) {
        //加载视图
        view=View.inflate(context, R.layout.ex_group_item ,null);

        final CheckBox groupCb= (CheckBox) view.findViewById(R.id.group_checkbox);
        TextView shopName= (TextView) view.findViewById(R.id.shop_name);


        shopName.setText(groupBeen.get(i).getSellerName());
        groupCb.setChecked(groupBeen.get(i).isGropuCb());

        //组复选按钮
        groupCb.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                boolean gchecked = groupCb.isChecked();
                groupBeen.get(i).setGropuCb(gchecked);
                Main2Activity main= (Main2Activity) context;
                for(GroupBean i: groupBeen){
                    boolean gropuCb = i.isGropuCb();
                    if(!gropuCb){
                        main.allCheckbox.setChecked(false);
                        break;
                    }else{
                        main.allCheckbox.setChecked(true);
                    }
                }
                int size = childBeen.get(i).size();
                if(gchecked){
                    for(int r=0;r<size;r++){
                        //Toast.makeText(context,"group按钮"+ gchecked+""+size, Toast.LENGTH_SHORT).show();
                        childBeen.get(i).get(r).setChildCb(true);
                    }
                }else{
                    for(int r=0;r<size;r++){
                        //Toast.makeText(context,"group按钮"+ gchecked+""+size, Toast.LENGTH_SHORT).show();
                        childBeen.get(i).get(r).setChildCb(false);
                    }
                }
                notifyDataSetChanged();
                main.changesum(childBeen);
            }
        });
        return view;
    }

    //二级组
    @Override
    public View getChildView(final int i, final int i1, boolean b, View v, ViewGroup viewGroup) {
        //加载视图
        v=View.inflate(context, R.layout.ex_child_item ,null);

        final CheckBox childCb = (CheckBox) v.findViewById(R.id.child_checkbox);
        TextView shopTitle= (TextView) v.findViewById(R.id.shop_title);
        TextView shopPrice= (TextView) v.findViewById(R.id.shop_price);
        ImageView shopImg= (ImageView) v.findViewById(R.id.shop_img);
        final AddDeleteView adv = (AddDeleteView) v.findViewById(R.id.adv);
        Button shop_delete= (Button) v.findViewById(R.id.shop_delete);

        childCb.setChecked(childBeen.get(i).get(i1).isChildCb());
        Glide.with(context).load(childBeen.get(i).get(i1).getImages()).into(shopImg);
        shopTitle.setText(childBeen.get(i).get(i1).getTitle());
        shopPrice.setText(childBeen.get(i).get(i1).getPrice()+"");
        adv.setNumber(childBeen.get(i).get(i1).getNum());

        final Main2Activity main= (Main2Activity) context;
        //控制删除按钮的显隐
        if(childBeen.get(i).get(i1).isBtn()){
            shop_delete.setVisibility(View.VISIBLE);
        }else{
            shop_delete.setVisibility(View.INVISIBLE);
        }
        //删除按钮监听
        shop_delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                int size = childBeen.get(i).size();
                if(size==1){
                    childBeen.remove(i);
                    groupBeen.remove(i);
                }else{
                    childBeen.get(i).remove(i1);
                }
                //点击删除后隐藏所有删除按钮
                for (List<ChildBean> i1:childBeen){
                    for(int r=0;r<i1.size();r++) {
                        i1.get(r).setBtn(false);
                    }
                }
                notifyDataSetChanged();
                main.changesum(childBeen);
            }
        });

        //加减器逻辑

        adv.setOnAddDelClickListener(new AddDeleteView.OnAddDelClickListener() {
            @Override
            public void onAddClick(View v) {
                int number = adv.getNumber();
                number++;
                adv.setNumber(number);
                childBeen.get(i).get(i1).setNum(number);
                main.changesum(childBeen);
            }

            @Override
            public void onDelClick(View v) {
                int number = adv.getNumber();
                number--;
                adv.setNumber(number);
                childBeen.get(i).get(i1).setNum(number);
                main.changesum(childBeen);
            }
        });

        //二级组的复选框监听
        childCb.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                boolean flag=false;
                boolean cchecked = childCb.isChecked();
                childBeen.get(i).get(i1).setChildCb(cchecked);
                //Toast.makeText(context,"child按钮"+ cchecked+""+i1, Toast.LENGTH_SHORT).show();
                Main2Activity main= (Main2Activity) context;
                for (List<ChildBean> i1:childBeen){
                    for(int r=0;r<i1.size();r++) {
                        boolean childCb1 = i1.get(r).isChildCb();
                        if(!childCb1){
                            main.allCheckbox.setChecked(false);
                            groupBeen.get(i).setGropuCb(false);
                            flag=true;
                            break;
                        }else{
                            main.allCheckbox.setChecked(true);
                            groupBeen.get(i).setGropuCb(true);
                        }
                    }
                    if(flag){
                        break;
                    }
                }

                int size = childBeen.get(i).size();
                for(int x=0;x<size;x++) {
                    boolean childCb1 = childBeen.get(i).get(x).isChildCb();
                    if(!childCb1){
                        groupBeen.get(i).setGropuCb(false);
                        break;
                    }else{
                        groupBeen.get(i).setGropuCb(true);
                    }
                }
                notifyDataSetChanged();
                main.changesum(childBeen);
            }
        });


        return v;
    }

    @Override
    public boolean isChildSelectable(int i, int i1) {
        return false;
    }
}

删除的逻辑
public class AddDeleteView extends LinearLayout {
    private OnAddDelClickListener listener;
    private EditText etNumber;

    //对外提供一个点击的回调接口
    public interface OnAddDelClickListener{
        void onAddClick(View v);
        void onDelClick(View v);
    }

    public void setOnAddDelClickListener(OnAddDelClickListener listener){
        if(listener!=null){
            this.listener=listener;
        }
    }

    public AddDeleteView(Context context) {
        this(context,null);
    }

    public AddDeleteView(Context context, AttributeSet attrs) {
        this(context, attrs,0);
    }

    public AddDeleteView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initView(context, attrs, defStyleAttr);
    }

    private void initView(Context context, AttributeSet attrs, int defStyleAttr) {
        View.inflate(context, R.layout.layout_add_delete,this);

        //获取控件
        TextView txtDelete= (TextView) findViewById(R.id.txt_delete);
        TextView txtAdd= (TextView) findViewById(R.id.txt_add);
        etNumber = (EditText) findViewById(R.id.et_number);


        TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.AddDeleteViewStyle);

        String leftText = typedArray.getString(R.styleable.AddDeleteViewStyle_left_text);
        String rightText = typedArray.getString(R.styleable.AddDeleteViewStyle_right_text);
        String middleText = typedArray.getString(R.styleable.AddDeleteViewStyle_middle_text);
        int color = typedArray.getColor(R.styleable.AddDeleteViewStyle_left_text_color, Color.BLACK);

        txtDelete.setText(leftText);
        txtAdd.setText(rightText);
        etNumber.setText(middleText);
        txtDelete.setTextColor(color);

        //回收
        typedArray.recycle();


        txtDelete.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.onDelClick(view);
            }
        });

        txtAdd.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {
                listener.onAddClick(view);
            }
        });

    }
    //对外提供一个修改数字的方法
    public void setNumber(int number){
        if(number>0){
            etNumber.setText(number+"");
        }
    }
    //对外提供一个获取当前数字的方法
    public int getNumber(){
        String string = etNumber.getText().toString();
        int i = Integer.parseInt(string);
        return i;
    }
}
Main_activity主文件展示
public class Main2Activity extends AppCompatActivity implements ImView {
    private ExpandableListView exListView;
    public CheckBox allCheckbox;
    private TextView totalPrice;
    private TextView totalnumber;

    List<GroupBean> groupBeen=new ArrayList<>();
    List<List<ChildBean>> childBeen=new ArrayList<>();

    private Presenter presenter;
    private ExpandableAdapter expandableAdapter;
    private TextView edit;

    private boolean flagedit=true;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        getSupportActionBar().hide();

        initView();

        presenter = new Presenter();
        presenter.attachView(this);
        Map<String,String> map = new HashMap<>();
        presenter.get("http://120.27.23.105/product/getCarts?uid=100",map,"car", ShopCarBean.class);

        //获取二级列表适配器
        expandableAdapter = new ExpandableAdapter(Main2Activity.this, groupBeen, childBeen);
        exListView.setAdapter(expandableAdapter);

        for(int i = 0; i < expandableAdapter.getGroupCount(); i++){

            exListView.expandGroup(i);

        }

        exListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {
            @Override
            public boolean onGroupClick(ExpandableListView expandableListView, View view, int i, long l) {
                return true;
            }
        });

        //全选监听
        allCheckbox.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                boolean checked = allCheckbox.isChecked();
                //改变一级item复选框
                for (GroupBean i:groupBeen){
                    i.setGropuCb(checked);
                }
                //改变二级item复选框
                for (List<ChildBean> i1:childBeen){
                    for(int r=0;r<i1.size();r++) {
                        i1.get(r).setChildCb(checked);
                    }
                }
                expandableAdapter.notifyDataSetChanged();
                changesum(childBeen);
                //Toast.makeText(Main2Activity.this,"全选按钮"+checked,Toast.LENGTH_SHORT).show();
            }
        });

        edit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                for (List<ChildBean> i1:childBeen){
                    for(int r=0;r<i1.size();r++) {
                        i1.get(r).setBtn(flagedit);
                    }
                }
                flagedit=!flagedit;
                expandableAdapter.notifyDataSetChanged();
            }
        });

    }
    //初始化控件
    private void initView() {
        exListView = (ExpandableListView) findViewById(R.id.exListView);
        allCheckbox = (CheckBox)findViewById(R.id.all_chekbox);
        totalPrice = (TextView)findViewById(R.id.total_price);
        totalnumber = (TextView)findViewById(R.id.total_number);
        edit = (TextView) findViewById(R.id.edit);
    }
    @Override
    public void onSuccess(String tag, Object o) {
        if(o!=null&&tag.equals("car")){
            ShopCarBean shopCarBean= (ShopCarBean) o;

            List<ShopCarBean.DataBean> data = shopCarBean.getData();
            for (ShopCarBean.DataBean i:data){
                GroupBean groupBean = new GroupBean(i.getSellerName(), false);
                this.groupBeen.add(groupBean);
                List<ShopCarBean.DataBean.ListBean> list = i.getList();
                List<ChildBean> ls=new ArrayList<>();
                for (ShopCarBean.DataBean.ListBean w:list){
                    String[] split = w.getImages().split("\\|");
                    ChildBean childBean = new ChildBean(w.getTitle(), split[0], w.getPrice(), 1, false,false);
                    ls.add(childBean);
                }
                this.childBeen.add(ls);

            }
            for(int i = 0; i < expandableAdapter.getGroupCount(); i++){
                exListView.expandGroup(i);
            }
            expandableAdapter.notifyDataSetChanged();

        }
    }

    @Override
    public void onFailed(String tag, Exception e) {
        Toast.makeText(Main2Activity.this,e.getMessage()+"",Toast.LENGTH_SHORT).show();
    }

    //计算和数量总价
    public void changesum(List<List<ChildBean>> childBeen){
        int count=0;
        double sum=0;
        for (List<ChildBean> i1:childBeen){
            for(int r=0;r<i1.size();r++) {
                boolean childCb1 = i1.get(r).isChildCb();
                if(childCb1){
                    double price = i1.get(r).getPrice();
                    int num = i1.get(r).getNum();
                    sum+=price*num;
                    count++;
                }
            }
        }
        totalPrice.setText("￥"+sum);
        totalnumber.setText("共有商品:"+count+"件");
    }
}