public class SelectCarModel {
 private String url="http://120.27.23.105/product/getCarts";
 private HashMap<String, String> map = new HashMap<>();
 public void verifySelectCarInfo(int uid, final ISelectCarPresenter iSelectCarPresenter){
  map.put("uid",uid+"");
  OkHttpUtils.getInstance().doPost(url,map, new CallBack() {
   @Override
   public void onFailed(String msg) {
    iSelectCarPresenter.onFailed("請求失敗");
   }
   @Override
   public void onSuccess(String request) {
    SelectCarBean selectCarBean = GsonUtils.getInstance().fromJson(request, SelectCarBean.class);
    String code = selectCarBean.getCode();
    if ("0".equals(code)){
     List<SelectCarBean.DataBean> data = selectCarBean.getData();
     iSelectCarPresenter.onSuccess(data);
    }else{
     iSelectCarPresenter.onFailed("請求失敗");
    }
   }
  });
 }
}

public interface ISelectCarPresenter {
 void onFailed(String msg);
 void onSuccess(List<SelectCarBean.DataBean> data);
}

public interface ISelectCarView {
 void onFailed(String msg);
 void onSuccess(List<SelectCarBean.DataBean> data);
}

public class SelectCarPresenter implements ISelectCarPresenter{
 private ISelectCarView iSelectCarView;
 private SelectCarModel selectCarModel;
 public SelectCarPresenter (ISelectCarView iSelectCarView){
  this.iSelectCarView = iSelectCarView;
  selectCarModel = new SelectCarModel();
 }
 //執(zhí)行集合信息
 public void excuteSelectCarData(int uid){
  //傳到model
  selectCarModel.verifySelectCarInfo(uid,this);
 }
 @Override
 public void onFailed(String msg) {
  iSelectCarView.onFailed(msg);
 }
 @Override
 public void onSuccess(List<SelectCarBean.DataBean> data) {
  iSelectCarView.onSuccess(data);
 }
}

public class ShoppingCartActivity extends AppCompatActivity implements ISelectCarView,View.OnClickListener{
 private boolean isLogin;
 private SelectCarPresenter selectCarPresenter;
 private ExpandableListView car_elv;
 private List<Group> glist = new ArrayList<>();
 private List<List<Child>> clist = new ArrayList<>();
 private CarExpandAdapter carExpandAdapter;
 private TextView edit_tv;
 private CheckBox chooseAll;
 private TextView totalPrice;
 private TextView btnAmount;
 private boolean isAll;
 private double p;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_shoppingcar);
  //初始化數(shù)據(jù)
  init();
  chooseAll.setOnClickListener(this);
  btnAmount.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    Intent intent = new Intent(ShoppingCartActivity.this, IndentActivity.class);
    intent.putExtra("price",p+"");
    startActivity(intent);
   }
  });
 }
 /**
  * 查詢購物車
  */
 private void selectShoppingCar() {
   selectCarPresenter = new SelectCarPresenter(this);
   selectCarPresenter.excuteSelectCarData(3381);
   carExpandAdapter = new CarExpandAdapter(this,glist,clist,this);
   car_elv.setAdapter(carExpandAdapter);
 }
 /**
  * 初始化屬性
  */
 private void init() {
  car_elv = (ExpandableListView) findViewById(R.id.car_elv);
  edit_tv = (TextView) findViewById(R.id.edit_tv);
  chooseAll = (CheckBox) findViewById(R.id.chooseAll);
  totalPrice = (TextView) findViewById(R.id.totalPrice);
  btnAmount = (TextView) findViewById(R.id.btnAmount);
  //登錄購物車
  selectShoppingCar();
 }
 @Override
 public void onFailed(String msg) {
 }
 @Override
 public void onSuccess(List<SelectCarBean.DataBean> data) {
  glist.clear();
  clist.clear();
  for(int i = 0;i<data.size();i++){
   glist.add(new Group(false,data.get(i).getSellerName()));
   List<SelectCarBean.DataBean.ListBean> list = data.get(i).getList();
   List<Child> cl = new ArrayList<>();
   for (int j = 0; j< list.size(); j++){
    cl.add(new Child(false, list.get(j).getTitle(),list.get(j).getPrice(), list.get(j).getImages(), list.get(j).getNum(),list.get(j).getSubhead(),list.get(j).getPid()));
   }
   clist.add(cl);
  }
  for(int s = 0; s < carExpandAdapter.getGroupCount(); s++){
   car_elv.expandGroup(s);
  }
  carExpandAdapter.notifyDataSetChanged();
 }
 @Override
 public void onResume() {
  super.onResume();
  init();
 }
 /**
  * 反選
  * @param isAll
  */
 public void getisAll(Boolean isAll) {
  chooseAll.setChecked(isAll);
 }
 /**
  * 全選按鈕
  * @param view
  */
 @Override
 public void onClick(View view) {
  isAll = chooseAll.isChecked();
  if (!(isAll==true)) {
   for (int i = 0; i < glist.size(); i++) {
    glist.get(i).setFlag(false);
    Log.e("Song","123");
   }
   for (int i=0 ;i<clist.size();i++){
    for (int j=0;j<clist.get(i).size();j++){
     clist.get(i).get(j).setFlag(false);
    }
   }
   if (isAll==true){
    isAll=false;
   }
   js();
   carExpandAdapter.notifyDataSetChanged();
  } else {
   for (int i = 0; i < glist.size(); i++) {
    glist.get(i).setFlag(true);
   }
   for (int i=0 ;i<clist.size();i++){
    for (int j=0;j<clist.get(i).size();j++){
     clist.get(i).get(j).setFlag(true);
    }
   }
   if (isAll==false){
    isAll=true;
   }
   js();
   carExpandAdapter.notifyDataSetChanged();
  }
 }
 //結算
 public void js(){
  p = 0;
  int s = 0;//選中商品數(shù)量
  for(int i=0;i<clist.size();i++){
   for(int j=0;j<clist.get(i).size();j++){
    if(clist.get(i).get(j).isFlag()){
     double price = clist.get(i).get(j).getPrice();
     int num = clist.get(i).get(j).getNum();
     p += price * num;
     s++;
    }
   }
  }
  totalPrice.setText("總價:"+ p +"￥");
  btnAmount.setText("結算:("+s+")");
 }
}

<LinearLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical" android:layout_width="match_parent"
 android:layout_height="match_parent">
 <RelativeLayout
  android:id="@+id/car_title"
  android:layout_width="match_parent"
  android:layout_height="0dp"
  android:layout_weight="1"
  android:background="#fff"
  >
  <TextView
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:gravity="center"
   android:text="購物車"
   android:textColor="#000"
   android:textSize="35dp"
   />
  <TextView
   android:id="@+id/edit_tv"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_weight="1.5"
   android:text="編輯"
   android:textSize="20dp"
   android:layout_marginRight="30dp"
   android:layout_centerVertical="true"
   android:layout_alignParentRight="true"
   android:layout_alignParentEnd="true"
   android:layout_marginEnd="30dp" />
 </RelativeLayout>
 <ExpandableListView
  android:id="@+id/car_elv"
  android:layout_width="match_parent"
  android:layout_height="0dp"
  android:layout_weight="9"
  android:layout_below="@+id/car_title"></ExpandableListView>
 <LinearLayout
  android:layout_width="match_parent"
  android:layout_height="0dp"
  android:layout_weight="1"
  android:orientation="horizontal"
  android:layout_gravity="bottom"
  >
  <CheckBox
   android:id="@+id/chooseAll"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:textSize="25sp"
   android:padding="10dp"
   android:text="全選"/>

  <TextView
   android:id="@+id/totalPrice"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:textSize="25sp"
   android:layout_weight="1"
   android:padding="10dp"
   android:gravity="center"
   android:text="合計:0.00 ￥"/>

  <TextView
   android:id="@+id/btnAmount"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="結算 : (0)"
   android:gravity="center"
   android:background="@android:color/holo_orange_light"
   android:textColor="@android:color/black"
   android:textSize="25sp"
   android:padding="10dp"/>
 </LinearLayout>
</LinearLayout>

public class CarExpandAdapter extends BaseExpandableListAdapter{
 private Context context;
 private List<Group> groupList;
 private List<List<Child>> childList;
 private ShoppingCartActivity s;
 public static boolean flog;
 public CarExpandAdapter(Context context, List<Group> groupList, List<List<Child>> childList,ShoppingCartActivity s) {
  this.context = context;
  this.groupList = groupList;
  this.childList = childList;
  this.s = s;
 }
 @Override
 public int getGroupCount() {
  return groupList.size();
 }
 @Override
 public int getChildrenCount(int i) {
  return childList.get(i).size();
 }
 @Override
 public Object getGroup(int i) {
  return groupList.get(i);
 }
 @Override
 public Object getChild(int i, int i1) {
  return childList.get(i).get(i1);
 }
 @Override
 public long getGroupId(int i) {
  return i;
 }
 @Override
 public long getChildId(int i, int i1) {
  return i1;
 }
 @Override
 public boolean hasStableIds() {
  return false;
 }

 //第一級列表viewhodel
 class GroupViewHolder{
  CheckBox group_box;
  TextView group_tv;
 }
 //第二級列表的viewhodel
 class ChildViewHodel{
  CheckBox child_box;
  ImageView child_iv;
  TextView child_tv_name;
  TextView child_tv_attr;
  TextView child_tv_price;
  TextView child_tv_num;
  TextView child_tv_minus;
  TextView child_tv_show_num;
  TextView child_tv_add;
  Button delete;
 }
 @Override
 public View getGroupView(final int i, boolean b, View view, ViewGroup viewGroup) {
  final GroupViewHolder holder;
  if (view==null){
   holder = new GroupViewHolder();
   view = View.inflate(context, R.layout.group_layout,null);
   holder.group_box = view.findViewById(R.id.group_box);
   holder.group_tv = view.findViewById(R.id.group_tv);
   view.setTag(holder);
  }else{
   holder = (GroupViewHolder) view.getTag();
  }
  holder.group_tv.setText(groupList.get(i).getName());
  holder.group_box.setChecked(groupList.get(i).isFlag());
  holder.group_box.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    //group布爾值變成選中狀態(tài)
    groupList.get(i).setFlag(holder.group_box.isChecked());
    //遍歷Group的集合
    for (int i=0;i<groupList.size();i++){
     //如果有一個未選中 全選變成FALSE并跳出
     if (!groupList.get(i).isFlag()){
      s.getisAll(false);
      break;
     }else{
      s.getisAll(true);
     }
    }
    //Child集合布爾值為選中的狀態(tài)
    for (int j=0;j<childList.get(i).size();j++){
     childList.get(i).get(j).setFlag(holder.group_box.isChecked());
    }
    //刷新適配器
    notifyDataSetChanged();
    s.js();
   }
  });
  return view;
 }
 @Override
 public View getChildView(final int i, final int i1, boolean b, View view, ViewGroup viewGroup) {
  final ChildViewHodel hodel;
  if (view == null){
   hodel = new ChildViewHodel();
   view = View.inflate(context,R.layout.child_layout,null);
   hodel.child_box=view.findViewById(R.id.child_box);
   hodel.child_iv = view.findViewById(R.id.child_iv);
   hodel.child_tv_name = view.findViewById(R.id.child_tv_name);
   hodel.child_tv_attr = view.findViewById(R.id.child_tv_attr);
   hodel.child_tv_price = view.findViewById(R.id.child_tv_price);
   hodel.child_tv_minus = view.findViewById(R.id.child_tv_minus);
   hodel.child_tv_show_num = view.findViewById(R.id.child_tv_show_num);
   hodel.child_tv_add = view.findViewById(R.id.child_tv_add);
   hodel.child_tv_num = view.findViewById(R.id.child_tv_num);
   hodel.delete=view.findViewById(R.id.delete);
   view.setTag(hodel);
  }else{
   hodel = (ChildViewHodel) view.getTag();
  }
  hodel.child_tv_name.setText(childList.get(i).get(i1).getTitle());
  hodel.child_tv_show_num.setText(childList.get(i).get(i1).getNum()+"");
  hodel.child_tv_attr.setText(childList.get(i).get(i1).getColor());
  hodel.child_tv_price.setText(childList.get(i).get(i1).getPrice()+"");
  Glide.with(context).load(childList.get(i).get(i1).getImage().split("\\|")[0]).into(hodel.child_iv);
  hodel.child_box.setChecked(childList.get(i).get(i1).isFlag());
  //刪除的點擊事件,根據(jù)接口刪除的
  hodel.delete.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    DeletePresenter presenter = new DeletePresenter(new DeleteView() {
     @Override
     public void onDeleteFailure(String error) {
      Toast.makeText(context, error, Toast.LENGTH_SHORT).show();
     }
     @Override
     public void onDeleteSuccesss(String code) {
      Toast.makeText(context, "刪除成功", Toast.LENGTH_SHORT).show();
     }
    });
    int pid = childList.get(i).get(i1).getPid();
    presenter.verfiy(3381+"",pid+"");
    childList.get(i).remove(i1);
//    if (childList.get(i).size()==0){
//     groupList.remove(i);
//    }
    notifyDataSetChanged();
   }
  });
  hodel.child_box.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    //Child布爾值變成選中狀態(tài)
    childList.get(i).get(i1).setFlag(hodel.child_box.isChecked());
    //遍歷Child集合
    for (int i=0;i<childList.size();i++){
     for (int j=0;j<childList.get(i).size();j++){
      //如果有一個未選中  全選與商家按鈕變成false并跳出
      if(!childList.get(i).get(j).isFlag()){
       groupList.get(i).setFlag(false);
       s.getisAll(false);
       break;
      }else{//全部選中 全選與商家按鈕變成true
       groupList.get(i).setFlag(true);
       s.getisAll(false);
      }
     }
    }
    //二次遍歷
    for(int i=0;i<groupList.size();i++){
     boolean flag = groupList.get(i).isFlag();
     if(flag){
      s.getisAll(true);
     }else{
      s.getisAll(false);
      break;
     }
    }
    notifyDataSetChanged();
    //計算加減
    s.js();
   }
  });
  ////
  hodel.child_tv_minus.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    String num = hodel.child_tv_show_num.getText().toString();
    int num1 = Integer.parseInt(num);
    num1--;
    childList.get(i).get(i1).setNum(num1);
    hodel.child_tv_show_num.setText(childList.get(i).get(i1).getNum()+"");
    notifyDataSetChanged();
    s.js();
   }
  });
  hodel.child_tv_add.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    String num = hodel.child_tv_show_num.getText().toString();
    int num1 = Integer.parseInt(num);
    num1++;
    childList.get(i).get(i1).setNum(num1);
    hodel.child_tv_show_num.setText(childList.get(i).get(i1).getNum()+"");
    notifyDataSetChanged();
    s.js();
   }
  });
  return view;
 }
 @Override
 public boolean isChildSelectable(int i, int i1) {
  return false;
 }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="horizontal" android:layout_width="match_parent"
 android:layout_height="match_parent">
 <CheckBox
  android:id="@+id/group_box"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content" />
 <TextView
  android:id="@+id/group_tv"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="商家"
  />
</LinearLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="horizontal" android:layout_width="match_parent"
 android:layout_height="wrap_content">
 <CheckBox
  android:id="@+id/child_box"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_centerVertical="true"
  android:layout_marginLeft="5dp"
  android:scaleX="0.6"
  android:scaleY="0.6" />
 <ImageView
  android:id="@+id/child_iv"
  android:layout_width="70dp"
  android:layout_height="80dp"
  android:layout_centerVertical="true"
  android:layout_marginLeft="5dp"
  android:background="@mipmap/ic_launcher"
  android:layout_toRightOf="@id/child_box" />
 <LinearLayout
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_marginLeft="10dp"
  android:layout_marginTop="15dp"
  android:layout_toRightOf="@id/child_iv"
  android:orientation="vertical">
  <TextView
   android:id="@+id/child_tv_name"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="酒紅色純紅色純羊毛西服套裝"
   android:textColor="@android:color/black"
   android:textSize="12sp"
   android:textStyle="bold" />
  <LinearLayout
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:orientation="horizontal">
   <TextView
    android:id="@+id/child_tv_attr"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="3dp"
    android:text="屬性:粉藍色"
    android:textSize="12sp"
    android:textColor="@color/colorPrimary" />
  </LinearLayout>
  <LinearLayout
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginTop="4dp"
   android:orientation="horizontal">
   <TextView
    android:id="@+id/child_tv_price"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="￥390"
    android:textColor="@android:color/holo_red_dark"
    android:textSize="12sp"
    android:textStyle="bold" />
   <TextView
    android:id="@+id/child_tv_num"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="20dp"
    android:text="x1"
    android:textColor="@android:color/darker_gray" />
   <LinearLayout
    android:id="@+id/rl_edit"
    android:layout_width="120dp"
    android:background="@android:color/holo_orange_light"
    android:layout_height="30dp"
    android:layout_marginLeft="20dp"
    >
    <TextView
     android:id="@+id/child_tv_minus"
     android:layout_width="0dp"
     android:layout_weight="1"
     android:gravity="center"
     android:textColor="@android:color/black"
     android:background="@android:color/white"
     android:layout_margin="1dp"
     android:layout_height="match_parent"
     android:text=" - " />
    <TextView
     android:id="@+id/child_tv_show_num"
     android:layout_width="0dp"
     android:layout_weight="1"
     android:gravity="center"
     android:background="@android:color/white"
     android:layout_margin="1dp"
     android:layout_height="match_parent"
     android:text="1"
     />
    <TextView
     android:id="@+id/child_tv_add"
     android:layout_width="0dp"
     android:layout_weight="1"
     android:gravity="center"
     android:layout_margin="1dp"
     android:background="@android:color/white"
     android:layout_height="match_parent"
     android:text=" + " />
   </LinearLayout>
  </LinearLayout>
 </LinearLayout>
 <Button
 android:id="@+id/delete"
 android:layout_width="30dp"
 android:layout_height="30dp"
 android:layout_alignParentRight="true"
 android:layout_centerVertical="true"
 android:gravity="center"
 android:text="✘"
 android:background="@android:color/holo_blue_light"
 android:textSize="20sp"
 android:textColor="@android:color/holo_green_dark"
 android:layout_margin="5dp"
 android:visibility="visible" />
</RelativeLayout>

public class Child {
 /*
 false,
 list.get(j).getTitle(),
 (float) list.get(j).getPrice(),
 list.get(j).getImages(),
 list.get(j).getNum()
  */
 private boolean flag;
 private String title;
 private double price;
 private String image;
 private int num;
 private String color;
 private int pid;
 public Child(boolean flag, String title, double price, String image, int num,String color,int pid) {
  this.flag = flag;
  this.title = title;
  this.price = price;
  this.image = image;
  this.num = num;
  this.color = color;
  this.pid = pid;
 }
 public boolean isFlag() {
  return flag;
 }
 public void setFlag(boolean flag) {
  this.flag = flag;
 }
 public String getTitle() {
  return title;
 }
 public void setTitle(String title) {
  this.title = title;
 }
 public double getPrice() {
  return price;
 }
 public void setPrice(double price) {
  this.price = price;
 }
 public String getImage() {
  return image;
 }
 public void setImage(String image) {
  this.image = image;
 }
 public int getNum() {
  return num;
 }
 public void setNum(int num) {
  this.num = num;
 }
 public String getColor() {
  return color;
 }
 public void setColor(String color) {
  this.color = color;
 }
 public int getPid() {
  return pid;
 }
 public void setPid(int pid) {
  this.pid = pid;
 }
}

public class Group {
 private boolean flag;
 private String name;
 public Group(boolean flag, String name) {
  this.flag = flag;
  this.name = name;
 }
 public boolean isFlag() {
  return flag;
 }
 public void setFlag(boolean flag) {
  this.flag = flag;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
}