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);  //初始化數據  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    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    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    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; }}