Android 中怎么利用Okhttp请求查询购物车，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。
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查询购物车的model层
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");
}
}
});
}
} 查询购物车的接口
m层的
public interface ISelectCarPresenter {
void onFailed(String msg);
void onSuccess(List data);
} p层的
public interface ISelectCarView {
void onFailed(String msg);
void onSuccess(List data);
} 查询购物车的presenter层
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);
}
} 查询购物车的view层
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< 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();
}
/**
* 反选
* @param isAll
*/
public void getisAll(Boolean isAll) {
chooseAll.setChecked(isAll);
}
/**
* 全选按钮
* @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 ;iview层布局
二级购物车列表的适配器
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适配器的一级布局
适配器二级布局
bean类Child
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;
}
}group类
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;
}
}看完上述内容，你们掌握Android 中怎么利用Okhttp请求查询购物车的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注创新互联行业资讯频道，感谢各位的阅读！
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