AndroidOkhttp请求查询购物车的实例代码

public class SelectCarModel {
 private String url="http://120.27.23.105/product/getCarts";
 private HashMap 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("请求失败");
   }
   @Override
   public void onSuccess(String request) {
    SelectCarBean selectCarBean = GsonUtils.getInstance().fromJson(request, SelectCarBean.class);
    String code = selectCarBean.getCode();
    if ("0".equals(code)){
     List data = selectCarBean.getData();
     iSelectCarPresenter.onSuccess(data);
    }else{
     iSelectCarPresenter.onFailed("请求失败");
    }
   }
  });
 }
}

public interface ISelectCarPresenter {
 void onFailed(String msg);
 void onSuccess(List data);
}

public interface ISelectCarView {
 void onFailed(String msg);
 void onSuccess(List data);
}

public class SelectCarPresenter implements ISelectCarPresenter{
 private ISelectCarView iSelectCarView;
 private SelectCarModel selectCarModel;
 public SelectCarPresenter (ISelectCarView iSelectCarView){
  this.iSelectCarView = iSelectCarView;
  selectCarModel = new SelectCarModel();
 }
 //执行集合信息
 public void excuteSelectCarData(int uid){
  //传到model
  selectCarModel.verifySelectCarInfo(uid,this);
 }
 @Override
 public void onFailed(String msg) {
  iSelectCarView.onFailed(msg);
 }
 @Override
 public void onSuccess(List 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 glist = new ArrayList<>();
 private List> 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);
  //初始化数据
  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);
   }
  });
 }
 /**
  * 查询购物车
  */
 private void selectShoppingCar() {
   selectCarPresenter = new SelectCarPresenter(this);
   selectCarPresenter.excuteSelectCarData(3381);
   carExpandAdapter = new CarExpandAdapter(this,glist,clist,this);
   car_elv.setAdapter(carExpandAdapter);
 }
 /**
  * 初始化属性
  */
 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);
  //登录购物车
  selectShoppingCar();
 }
 @Override
 public void onFailed(String msg) {
 }
 @Override
 public void onSuccess(List data) {
  glist.clear();
  clist.clear();
  for(int i = 0;i list = data.get(i).getList();
   List cl = new ArrayList<>();
   for (int j = 0; j

public class CarExpandAdapter extends BaseExpandableListAdapter{
 private Context context;
 private List groupList;
 private List> childList;
 private ShoppingCartActivity s;
 public static boolean flog;
 public CarExpandAdapter(Context context, List groupList, List> 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;
 }

 //第一级列表viewhodel
 class GroupViewHolder{
  CheckBox group_box;
  TextView group_tv;
 }
 //第二级列表的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布尔值变成选中状态
    groupList.get(i).setFlag(holder.group_box.isChecked());
    //遍历Group的集合
    for (int i=0;i

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;
 }
}