購物車

 //依賴
    compile 'io.reactivex.rxjava2:rxjava:2.0.1'  //Rxjava
    compile 'io.reactivex.rxjava2:rxandroid:2.0.1'  //Rx安卓
    compile 'com.squareup.retrofit2:retrofit:2.3.0' //Retrofit請求網絡
    compile 'com.squareup.retrofit2:converter-gson:2.3.0'//Gson
    compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
    compile 'com.squareup.okhttp3:logging-interceptor:3.5.0'//攔截器
    compile 'com.youth.banner:banner:1.4.9' //Banner依賴
    //圖片的依賴
    compile 'com.facebook.fresco:fresco:0.14.1'
    compile 'com.facebook.fresco:animated-base-support:0.14.1'
    compile 'com.facebook.fresco:animated-gif:0.14.1'
    compile 'com.facebook.fresco:webpsupport:0.14.1'
    compile 'com.facebook.fresco:animated-webp:0.14.1'
    compile 'com.facebook.fresco:imagepipeline-okhttp3:0.14.1'

 //網絡狀態
    <uses-permission android:name="android.permission.INTERNET" />
    //sd讀寫權限
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

  android:name=".MApp"

 封裝Activity
 /**
  * Description:基類，封裝功用功能，方便子類繼承，子類只須要實現子類須要的功能便可
  */
 public abstract class BaseActivity extends AppCompatActivity{

     private boolean isStatus = false;//沉浸式透明狀態欄標示
     private boolean isShowActionBar = true;//是否隱藏actionbar
     private boolean isFullScreen = false;


     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         setContentView(bindLayout());
         initView();
         initData();
         setListener();
     }

     protected abstract int bindLayout();//綁定佈局

     protected abstract void initView();//初始化控件

     protected abstract void initData();//初始化數據

     protected abstract void setListener();//初始化點擊事件


     /**
      * 跳轉activity方法
      * @param clazz
      */
     public void startActivity(Class<?> clazz) {
         Intent intent = new Intent(this, clazz);
         startActivity(intent);
     }
     /**
      * 跳轉activity方法,帶參數
      * @param clazz
      */
     public void startActivity(Bundle bundle,Class<?> clazz) {
         Intent intent = new Intent(this, clazz);
         intent.putExtras(bundle);
         startActivity(intent);
     }

     public void setStatus(boolean status) {
         isStatus = status;
         if (isStatus){
             //判斷當前設備的版本號》=19的時候，走這個代碼塊，這個用於版本適配
             if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.KITKAT){

                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
             }
         }
     }

     public void setShowActionBar(boolean showActionBar) {
         isShowActionBar = showActionBar;

         if (isShowActionBar){
             getSupportActionBar().show();
         }else{
             getSupportActionBar().hide();
         }
     }

     public void setFullScreen(boolean fullScreen) {
         isFullScreen = fullScreen;
         if (isFullScreen){//是全屏的時候
             getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
         }
     }

     public void showToast(String msg){
         Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
     }
 }

 //Bean類
 //顯示購物車數據
 public class CartBean {

     private String code;
     private String msg;
     private List<DataBean> data;

     public String getCode() {
         return code;
     }

     public void setCode(String code) {
         this.code = code;
     }

     public String getMsg() {
         return msg;
     }

     public void setMsg(String msg) {
         this.msg = msg;
     }

     public List<DataBean> getData() {
         return data;
     }

     public void setData(List<DataBean> data) {
         this.data = data;
     }

     public static class DataBean {

         private String sellerName;
         private String sellerid;
         private List<ListBean> list;
         private boolean check;

         public boolean isCheck() {
             return check;
         }

         public void setCheck(boolean check) {
             this.check = check;
         }
         public String getSellerName() {
             return sellerName;
         }

         public void setSellerName(String sellerName) {
             this.sellerName = sellerName;
         }

         public String getSellerid() {
             return sellerid;
         }

         public void setSellerid(String sellerid) {
             this.sellerid = sellerid;
         }

         public List<ListBean> getList() {
             return list;
         }

         public void setList(List<ListBean> list) {
             this.list = list;
         }

         public static class ListBean {

             private double bargainPrice;
             private String createtime;
             private String detailUrl;
             private String images;
             private int num;
             private int pid;
             private double price;
             private int pscid;
             private int selected;
             private int sellerid;
             private String subhead;
             private String title;
             private boolean check;


             public boolean isCheck() {
                 return check;
             }

             public void setCheck(boolean check) {
                 this.check = check;
             }
             public double getBargainPrice() {
                 return bargainPrice;
             }

             public void setBargainPrice(double bargainPrice) {
                 this.bargainPrice = bargainPrice;
             }

             public String getCreatetime() {
                 return createtime;
             }

             public void setCreatetime(String createtime) {
                 this.createtime = createtime;
             }

             public String getDetailUrl() {
                 return detailUrl;
             }

             public void setDetailUrl(String detailUrl) {
                 this.detailUrl = detailUrl;
             }

             public String getImages() {
                 return images;
             }

             public void setImages(String images) {
                 this.images = images;
             }

             public int getNum() {
                 return num;
             }

             public void setNum(int num) {
                 this.num = num;
             }

             public int getPid() {
                 return pid;
             }

             public void setPid(int pid) {
                 this.pid = pid;
             }

             public double getPrice() {
                 return price;
             }

             public void setPrice(double price) {
                 this.price = price;
             }

             public int getPscid() {
                 return pscid;
             }

             public void setPscid(int pscid) {
                 this.pscid = pscid;
             }

             public int getSelected() {
                 return selected;
             }

             public void setSelected(int selected) {
                 this.selected = selected;
             }

             public int getSellerid() {
                 return sellerid;
             }

             public void setSellerid(int sellerid) {
                 this.sellerid = sellerid;
             }

             public String getSubhead() {
                 return subhead;
             }

             public void setSubhead(String subhead) {
                 this.subhead = subhead;
             }

             public String getTitle() {
                 return title;
             }

             public void setTitle(String title) {
                 this.title = title;
             }
         }
     }
 }

 //-------------購物車刪改的類
 public class AddCartBean {
     /**
      * msg : 加購成功
      * code : 0
      */
     private String msg;
     private String code;

     public String getMsg() {
         return msg;
     }

     public void setMsg(String msg) {
         this.msg = msg;
     }

     public String getCode() {
         return code;
     }

     public void setCode(String code) {
         this.code = code;
     }
 }

 //utils
 //根目錄
 public class HttpConfig {
     //retrofit根目錄
     public static final String _URL="http://120.27.23.105/";
 }
 //--------------計算價格的類
 public class JisuanUtils {
     /**
      * 提供精確的加法運算。
      * @param v1 被加數
      * @param v2 加數
      * @return 兩個參數的和
      */
     public static double add(double v1,double v2){
         BigDecimal b1 = new BigDecimal(Double.toString(v1));
         BigDecimal b2 = new BigDecimal(Double.toString(v2));
         return b1.add(b2).doubleValue();
     }
     /**
      * 提供精確的減法運算。
      * @param v1 被減數
      * @param v2 減數
      * @return 兩個參數的差
      */
     public static double sub(double v1,double v2){
         BigDecimal b1 = new BigDecimal(Double.toString(v1));
         BigDecimal b2 = new BigDecimal(Double.toString(v2));
         return b1.subtract(b2).doubleValue();
     }
     /**
      * 提供精確的乘法運算。
      * @param v1 被乘數
      * @param v2 乘數
      * @return 兩個參數的積
      */
     public static double mul(double v1,double v2){
         BigDecimal b1 = new BigDecimal(Double.toString(v1));
         BigDecimal b2 = new BigDecimal(Double.toString(v2));
         return b1.multiply(b2).doubleValue();
     }

 }

 //-----------------------網絡請求類
 /**
  * Description:retrofit工具類
  * 構造者模式如何封裝：首先有各類builder過程，最後經過build()方法對對象進行建立
  */
 public class RetrofitUtils {

     //建立私有屬性
     private static RetrofitUtils mInstance;
     //建立ApiService引用
     private static ApiService apiService;

     /**
      * 聲明私有構造方法，相似於單利模式，讓調用者沒法new出對象，只能經過構造者模式建立對象
      */
     private RetrofitUtils() {

     }

     /**
      * 前後調用的過程，只有對象給build成功以後，才能調用apiservice，這也是retrofit的幾個前後的步驟
      * @return
      */
     public ApiService getApiService() {
         return apiService;
     }

     public static class Builder {

         private OkHttpClient okHttpClient;

         private List<CallAdapter.Factory> callAdapterFactorys = new ArrayList<>();
         private List<Converter.Factory> convertFactorys = new ArrayList<>();

         public Builder addCallAdapterFactory(CallAdapter.Factory factory) {
             callAdapterFactorys.add(factory);
             return this;//返回this的目的是：能夠鏈式調用
         }

         public Builder addConverterFactory(Converter.Factory factory) {
             convertFactorys.add(factory);
             return this;
         }

         public Builder client(OkHttpClient okHttpClient) {
             this.okHttpClient = okHttpClient;
             return this;
         }

         /**
          * build方法纔是真正的業務邏輯操做，纔是真正構建對象的過程
          * @return
          */
         public RetrofitUtils build() {


             Retrofit.Builder builder = new Retrofit.Builder();

             if (convertFactorys != null && convertFactorys.size() == 0) {
                 //若是集合中沒有對象，咱們添加默認的gson解析器
                 builder.addConverterFactory(GsonConverterFactory.create());
             }

             for (Converter.Factory convertFactory : convertFactorys) {
                 builder.addConverterFactory(convertFactory);
             }

             if (callAdapterFactorys != null && callAdapterFactorys.size() == 0) {
                 builder.addCallAdapterFactory(RxJava2CallAdapterFactory.create());

             }

             for (CallAdapter.Factory callAdapterFactory : callAdapterFactorys) {
                 builder.addCallAdapterFactory(callAdapterFactory);
             }

             //第一步建立retrofit對象
             Retrofit retrofit = builder.client(okHttpClient).baseUrl(HttpConfig._URL)
                     .build();
             //第二步，建立apiservice接口類
             apiService = retrofit.create(ApiService.class);
             //第三步，請求邏輯(這個供外部調用者調用)
             mInstance = new RetrofitUtils();//私有構造方法，只有本類能夠new出實例
             return mInstance;
         }
     }
 }

 //ApiService網絡請求接口
 public interface ApiService {
     @GET("product/getCarts?source=android")
     Observable<CartBean> rxjavaShowCart(@Query("uid") String uid);

     @POST("product/deleteCart")
     @FormUrlEncoded
     Observable<AddCartBean> rxjavaDeleteCart(@FieldMap Map<String, String> map);

     @POST("product/updateCarts")
     @FormUrlEncoded
     Observable<AddCartBean> rxjavaUpdateCarts(@FieldMap Map<String, String> map);
 }

 //model層
 //--------刪除
 public class DeleteCartModel {
     public void deleteCart(String uid,String pid,final DeleteCartCallback deleteCartCallback){
         Map<String, String> map = new HashMap<>();
         map.put("uid", uid);
         map.put("pid", pid);
         OkHttpClient okHttpClient = new OkHttpClient.Builder()
                 .addNetworkInterceptor(new HttpLoggingInterceptor()
                         .setLevel(HttpLoggingInterceptor.Level.BODY))
                 .build();
         Retrofit retrofit = new Retrofit.Builder()
                 .client(okHttpClient)
                 .addConverterFactory(GsonConverterFactory.create())
                 .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                 .baseUrl(HttpConfig._URL).build();
         ApiService apiService = retrofit.create(ApiService.class);
         apiService.rxjavaDeleteCart(map).subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<AddCartBean>() {
                     @Override
                     public void onSubscribe(Disposable d) {

                     }

                     @Override
                     public void onNext(AddCartBean value) {
                         if (value.getCode().equals("0")) {
                             deleteCartCallback.deleteCartSuccess(value);
                         }
                     }

                     @Override
                     public void onError(Throwable e) {
                         deleteCartCallback.failure(e);
                     }

                     @Override
                     public void onComplete() {

                     }
                 });


     }
     public interface DeleteCartCallback {
         void deleteCartSuccess(AddCartBean bean);//網絡請求成功
         void failure(Throwable t);//網絡請求失敗
     }
 }

 //presenter層
 public class ShowCartPresenter {
     private final IShowCartView view;
     private final ShowCartModel showCartModel;
     private final DeleteCartModel deleteCartModel;
     private final UpdateCartsModel updateCartsModel;

     public ShowCartPresenter(IShowCartView iShowCartView) {
         showCartModel = new ShowCartModel();
         deleteCartModel = new DeleteCartModel();
         updateCartsModel = new UpdateCartsModel();
         this.view=iShowCartView;
     }
     public void showCart(String uid) {
         showCartModel.showCart(uid, new ShowCartModel.ShowCartCallback() {
             @Override
             public void showCartSuccess(CartBean bean) {
                 List<CartBean.DataBean> data = bean.getData();
                 view.showCartSuccess(data);
             }

             @Override
             public void failure(Throwable t) {
                 view.showCartfailure(t);
             }
         });
     }

     public void deleteCart(String uid,String pid){
         deleteCartModel.deleteCart(uid, pid, new DeleteCartModel.DeleteCartCallback() {
             @Override
             public void deleteCartSuccess(AddCartBean bean) {
                 view.deleteCartSuccess(bean.getMsg());
             }

             @Override
             public void failure(Throwable t) {
                 view.deleteCartfailure(t);
             }
         });
     }
     public void updateCarts(String uid,String sellerid,String pid,String selected,String num){
         updateCartsModel.updateCarts(uid, sellerid, pid, selected, num, new UpdateCartsModel.UpdateCartsCallback() {
             @Override
             public void updateCartsSuccess(AddCartBean bean) {
                 view.updateCartsSuccess(bean.getMsg());
             }

             @Override
             public void failure(Throwable t) {
                 view.updateCartsfailure(t);
             }
         });
     }
 }

 //view層
 public interface IShowCartView {
     void showCartSuccess(List<CartBean.DataBean> data);//網絡請求成功
     void showCartfailure(Throwable t);//網絡請求失敗（斷網，服務器崩潰，接口地址不正確，弱網）
     void jisuan(String count,String priceAll);
     void deleteCartSuccess(String str);//網絡請求成功
     void deleteCartfailure(Throwable t);//網絡請求失敗（斷網，服務器崩潰，接口地址不正確，弱網）
     void updateCartsSuccess(String str);//網絡請求成功
     void updateCartsfailure(Throwable t);//網絡請求失敗（斷網，服務器崩潰，接口地址不正確，弱網）
 }

 //自定義加減器
 public class AddMinusView extends LinearLayout {

     private OnAddMinusClickListener listener;
     private EditText etNumber;

     //對外提供一個點擊的回調接口
     public interface OnAddMinusClickListener{
         void onAddClick(View v);
         void onMinusClick(View v);
         void onEtNumberClick(View v);
     }

     public void setOnAddMinusClickListener(OnAddMinusClickListener listener){
         if(listener!=null){
             this.listener=listener;
         }
     }
     public AddMinusView(Context context) {
         this(context,null);
     }

     public AddMinusView(Context context, @Nullable AttributeSet attrs) {
         this(context, attrs,0);
     }

     public AddMinusView(Context context, @Nullable 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_minus,this);

         //獲取控件
         TextView txtminus=findViewById(R.id.txt_minus);
         TextView txtAdd=findViewById(R.id.txt_add);
         etNumber = findViewById(R.id.et_number);


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

         String leftText = typedArray.getString(R.styleable.AddMinusViewStyle_left_text);
         String rightText = typedArray.getString(R.styleable.AddMinusViewStyle_right_text);
         String middleText = typedArray.getString(R.styleable.AddMinusViewStyle_middle_text);
         int color = typedArray.getColor(R.styleable.AddMinusViewStyle_left_text_color, Color.RED);

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

         //回收
         typedArray.recycle();


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

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

     }
     //對外提供一個修改數字的方法
     public void setNumber(int number){
         if(number>0){
             etNumber.setText(number+"");
         }
     }
     //對外提供一個獲取當前數字的方法
     public int getNumber(){
         String string = etNumber.getText().toString();
         int i = Integer.parseInt(string);
         return i;
     }
 }

 //---XML
 <LinearLayout
     android:orientation="horizontal"
     xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
     android:layout_height="match_parent">
     <TextView
         android:id="@+id/txt_minus"
         android:layout_width="35dp"
         android:layout_height="35dp"
         android:gravity="center"
         android:background="@drawable/shopcart_minus_grey"/>

     <EditText
         android:id="@+id/et_number"
         android:layout_marginTop="2dp"
         android:layout_width="35dp"
         android:layout_height="35dp"
         android:background="@drawable/edit"
         android:layout_weight="0.00"
         android:gravity="center"
         android:text="1"/>
     <TextView
         android:id="@+id/txt_add"
         android:layout_width="35dp"
         android:layout_height="35dp"
         android:gravity="center"
         android:background="@drawable/shopcart_add_red"/>
 </LinearLayout>

 //MainActivity
 public class MainActivity extends BaseActivity implements IShowCartView,View.OnClickListener {

     private ExpandableListView expandable;
     private CheckBox checkBox;
     private TextView cart_priceAll;
     private TextView cart_count;
     private List<CartBean.DataBean> data;
     private CartAdapter cartAdapter;
     private ShowCartPresenter showCartPresenter;
     private TextView cart_editor;
     private boolean flag=true;
     private Button cart_jiesuan;
     private Button cart_delete;

     @Override
     protected int bindLayout() {
         return R.layout.activity_main;
     }

     @Override
     protected void initView() {
         showCartPresenter = new ShowCartPresenter(this);
         showCartPresenter.showCart("12400");
         cart_editor = findViewById(R.id.cart_editor);
         expandable = findViewById(R.id.cart_expandable);
         checkBox = findViewById(R.id.cart_checkBox);
         cart_priceAll = findViewById(R.id.cart_priceAll);
         cart_count = findViewById(R.id.cart_count);
         cart_jiesuan = findViewById(R.id.cart_jiesuan);
         cart_delete = findViewById(R.id.cart_delete);
     }

     @Override
     protected void initData() {

     }

     @Override
     protected void setListener() {
         checkBox.setOnClickListener(this);
         cart_editor.setOnClickListener(this);
         cart_delete.setOnClickListener(this);
     }

     @Override
     public void showCartSuccess(final List<CartBean.DataBean> data) {
         this.data=data;
         cartAdapter = new CartAdapter(MainActivity.this,data, this);
         expandable.setAdapter(cartAdapter);
         //展開全部的列表
         int childCount = cartAdapter.getGroupCount();
         for (int i = 0; i < childCount; i++) {
             expandable.expandGroup(i);
         }
     }

     @Override
     public void showCartfailure(Throwable t) {
         Log.d("異常showCart", t.toString());
     }

     @Override
     public void jisuan(String count, String priceAll) {
         cart_count.setText("共"+count+"件商品");
         cart_priceAll.setText("總計："+priceAll);
     }
     //--------------------------------刪除購物車
     @Override
     public void deleteCartSuccess(String str) {
         Toast.makeText(MainActivity.this,str,Toast.LENGTH_SHORT).show();
     }

     @Override
     public void deleteCartfailure(Throwable t) {
         Log.d("異常deleteCart", t.toString());
     }
     //----------------------------------修改數量
     @Override
     public void updateCartsSuccess(String str) {
         Toast.makeText(MainActivity.this,str,Toast.LENGTH_SHORT).show();
     }

     @Override
     public void updateCartsfailure(Throwable t) {
         Log.d("異常updateCarts", t.toString());
     }


     //----------------------點擊事件
     @Override
     public void onClick(View v) {
         switch (v.getId()){
             case R.id.cart_checkBox:
                 for (int i = 0; i < data.size(); i++) {
                     data.get(i).setCheck(!data.get(i).isCheck());
                     List<CartBean.DataBean.ListBean> list = data.get(i).getList();
                     for (int j = 0; j < list.size(); j++) {
                         list.get(j).setCheck(!list.get(j).isCheck());
                     }
                 }
                 cartAdapter.jS();
                 cartAdapter.notifyDataSetChanged();
                 break;
             case R.id.cart_editor:
                 if (flag){
                     cart_editor.setText("完成");
                     cart_delete.setVisibility(View.VISIBLE);
                     cart_jiesuan.setVisibility(View.INVISIBLE);
                     cart_priceAll.setVisibility(View.INVISIBLE);
                     cart_count.setVisibility(View.INVISIBLE);
                     flag=false;
                 }else {
                     cart_editor.setText("編輯");
                     cart_delete.setVisibility(View.INVISIBLE);
                     cart_jiesuan.setVisibility(View.VISIBLE);
                     cart_priceAll.setVisibility(View.VISIBLE);
                     cart_count.setVisibility(View.VISIBLE);
                     flag=true;
                 }
                 break;
             case R.id.cart_delete:
                 List<CartBean.DataBean> toBeDeleteGroups = new ArrayList<CartBean.DataBean>();
                 //待刪除的組元素
                 for (int i = 0; i < data.size(); i++) {
                     CartBean.DataBean group = data.get(i);
                     if (data.get(i).isCheck()) {
                         toBeDeleteGroups.add(group);
                     }
                     List<CartBean.DataBean.ListBean> toBeDeleteChilds = new ArrayList<CartBean.DataBean.ListBean>();//待刪除的子元素
                     List<CartBean.DataBean.ListBean> list = data.get(i).getList();
                     for (int j = 0; j < list.size(); j++) {
                         if (list.get(j).isCheck()) {
                             toBeDeleteChilds.add(list.get(j));
                                 showCartPresenter.deleteCart("12400",list.get(j).getPid()+"");

                         }
                     }
                     list.removeAll(toBeDeleteChilds);
                 }
                 data.removeAll(toBeDeleteGroups);
                 cart_count.setText("共"+0+"件商品");
                 cart_priceAll.setText("總計："+0.0);
                 //從新設置購物車
                 cartAdapter.notifyDataSetChanged();
                 break;
         }
     }
 }

 //---適配器
 public class CartAdapter extends BaseExpandableListAdapter {
     private final IShowCartView IShowCartView;
     private final Context context;
     private final List<CartBean.DataBean> list;
     private GroupViewHolder holder;
     private ChildViewHolder childholder;


     public CartAdapter(Context context, List<CartBean.DataBean> data, IShowCartView IShowCartView) {
         this.IShowCartView=IShowCartView;
         this.context=context;
         this.list=data;
     }
     @Override
     public int getGroupCount() {
         return list.size();
     }

     @Override
     public int getChildrenCount(int groupPosition) {
         return list.get(groupPosition).getList().size();
     }
     @Override
     public Object getGroup(int groupPosition) {
         return list.get(groupPosition);
     }
     @Override
     public Object getChild(int groupPosition, int childPosition) {
         return list.get(groupPosition).getList().get(childPosition);
     }
     @Override
     public long getGroupId(int groupPosition) {
         return groupPosition;
     }
     @Override
     public long getChildId(int groupPosition, int childPosition) {
         return childPosition;
     }
     @Override
     public boolean hasStableIds() {
         return false;
     }
     @Override
     public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
         if(convertView==null){
             holder = new GroupViewHolder();
             convertView = View.inflate(context, R.layout.cart_groupitem, null);
             holder.group_box = convertView.findViewById(R.id.group_box);
             holder.group_name = convertView.findViewById(R.id.group_name);
             convertView.setTag(holder);
         }else{
             holder = (GroupViewHolder) convertView.getTag();
         }
         holder.group_box.setChecked(list.get(groupPosition).isCheck());
         holder.group_name.setText(list.get(groupPosition).getSellerName());
         holder.group_box.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 boolean isCleked = list.get(groupPosition).isCheck();
                 isCleked=!isCleked;
                 list.get(groupPosition).setCheck(isCleked);
                 List<CartBean.DataBean.ListBean> beans = CartAdapter.this.list.get(groupPosition).getList();
                 for (int i = 0; i < beans.size() ; i++) {
                     beans.get(i).setCheck(isCleked);
                 }
                 jS();
                 notifyDataSetChanged();
             }
         });
         return convertView;
     }
     @Override
     public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
         if (convertView==null){
             convertView = View.inflate(context, R.layout.cart_childitem, null);
             childholder = new ChildViewHolder();
             childholder.child_box = convertView.findViewById(R.id.child_box);
             childholder.child_img = convertView.findViewById(R.id.child_img);
             childholder.child_subhead = convertView.findViewById(R.id.child_subhead);
             childholder.child_price = convertView.findViewById(R.id.child_price);
             childholder.child_adm = convertView.findViewById(R.id.child_adm);
             convertView.setTag(childholder);
         }else{
             childholder = (ChildViewHolder) convertView.getTag();
         }
         childholder.child_box.setChecked(list.get(groupPosition).getList().get(childPosition).isCheck());
         String images = list.get(groupPosition).getList().get(childPosition).getImages();
         String image = images.split(".jpg")[0] + ".jpg";
         childholder.child_img.setImageURI(Uri.parse(image));
         childholder.child_subhead.setText(list.get(groupPosition).getList().get(childPosition).getSubhead());
         childholder.child_price.setText("售價爲:"+list.get(groupPosition).getList().get(childPosition).getPrice());
         childholder.child_adm.setNumber(list.get(groupPosition).getList().get(childPosition).getNum());
         childholder.child_box.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 boolean isCleked = list.get(groupPosition).getList().get(childPosition).isCheck();
                 isCleked=!isCleked;
                 list.get(groupPosition).getList().get(childPosition).setCheck(isCleked);
                 List<CartBean.DataBean.ListBean> beans = CartAdapter.this.list.get(groupPosition).getList();
                 boolean flag=true;
                 for (int i = 0; i < beans.size() ; i++) {
                     if (!beans.get(i).isCheck()) {
                         flag=false;
                     }
                 }
                 list.get(groupPosition).setCheck(flag);
                 jS();
                 notifyDataSetChanged();
             }
         });
         childholder.child_adm.setOnAddMinusClickListener(new AddMinusView.OnAddMinusClickListener() {
             @Override
             public void onAddClick(View v) {
                 int num = list.get(groupPosition).getList().get(childPosition).getNum();
                 num++;
                 list.get(groupPosition).getList().get(childPosition).setNum(num);
                 jS();
                 notifyDataSetChanged();
             }
             @Override
             public void onMinusClick(View v) {
                 int num = list.get(groupPosition).getList().get(childPosition).getNum();
                 num--;
                 if(num<=0) {
                     Toast.makeText(context, "最小數量爲1", Toast.LENGTH_SHORT).show();
                     return;
                 }
                 list.get(groupPosition).getList().get(childPosition).setNum(num);
                 jS();
                 notifyDataSetChanged();
             }

             @Override
             public void onEtNumberClick(View v) {
                 final AlertDialog builder = new AlertDialog.Builder(context).create();
                 builder.setTitle("舒適提示");
                 View inflate = View.inflate(context, R.layout.cart_update, null);
                 builder.setView(inflate);
                 TextView add = inflate.findViewById(R.id.goods_add);
                 TextView minus = inflate.findViewById(R.id.goods_minus);
                 final EditText goods_num = inflate.findViewById(R.id.goods_num);
                 Button cancel = inflate.findViewById(R.id.goods_cancel);
                 Button confirm = inflate.findViewById(R.id.goods_confirm);
                 goods_num.setText(list.get(groupPosition).getList().get(childPosition).getNum()+"");
                 add.setOnClickListener(new View.OnClickListener() {
                     @Override
                     public void onClick(View v) {
                         int num = Integer.parseInt(goods_num.getText().toString());
                         num++;
                         goods_num.setText(num+"");
                     }
                 });
                 minus.setOnClickListener(new View.OnClickListener() {
                     @Override
                     public void onClick(View v) {
                         int num = Integer.parseInt(goods_num.getText().toString());
                         num--;
                         if(num<=0) {
                             Toast.makeText(context, "最小數量爲1", Toast.LENGTH_SHORT).show();
                             return;
                         }
                         goods_num.setText(num+"");
                     }
                 });
                 confirm.setOnClickListener(new View.OnClickListener() {
                     private String uid;
                     @Override
                     public void onClick(View v) {
                         CartBean.DataBean.ListBean bean = list.get(groupPosition).getList().get(childPosition);
                         new ShowCartPresenter(IShowCartView).updateCarts("12400",bean.getSellerid()+"",bean.getPid()+"",bean.getSelected()+"",goods_num.getText().toString());
                         list.get(groupPosition).getList().get(childPosition).setNum(Integer.parseInt(goods_num.getText().toString()));
                         notifyDataSetChanged();
                         builder.dismiss();
                     }
                 });
                 builder.show();
             }
         });

         return convertView;
     }
     @Override
     public boolean isChildSelectable(int groupPosition, int childPosition) {
         return false;
     }
     class GroupViewHolder{
         public CheckBox group_box;
         public TextView group_name;
     }
     class ChildViewHolder{
         public CheckBox child_box;
         public ImageView child_img;
         public TextView child_subhead;
         public TextView child_price;
         public AddMinusView child_adm;

     }

     /**
      * 計算數量和價格
      * 經過遍歷一級的獲得二級的CheckBox，若是是選擇的選中狀態的話，就統計它們的總計的數量和價格
      */
     public void jS(){
         double priceAll = 0;
         int cou=0;
         for (int i = 0; i <list.size() ; i++) {
             List<CartBean.DataBean.ListBean> beans = this.list.get(i).getList();
             for (int j = 0; j <beans.size() ; j++) {
                 boolean check = beans.get(j).isCheck();
                 if(check==true){
                     double mul = JisuanUtils.mul(beans.get(j).getPrice(), beans.get(j).getNum());
                     priceAll = JisuanUtils.add(priceAll, mul);
                     cou+=beans.get(j).getNum();
                 }
             }
         }
         Log.d("數據呢", cou+"");
         IShowCartView.jisuan(cou+"",priceAll+"");
     }
 }

 //values下
 //attrs.xml
  <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <declare-styleable name="AddMinusViewStyle">

         <attr name="left_text" format="string"/>

         <attr name="right_text" format="string"/>
         <attr name="middle_text" format="integer"/>

         <attr name="left_text_color" format="color"/>
     </declare-styleable>
 </resources>

 //---color.XML
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <color name="colorPrimary">#3F51B5</color>
     <color name="colorPrimaryDark">#303F9F</color>
     <color name="colorAccent">#FF4081</color>
     <color name="Cornsilk">#FFF8DC</color>
     <color name="BlueViolet">#8A2BE2</color>
     <color name="White">#FFFFFF</color>
     <color name="Silver">#C0C0C0</color>
     <color name="Red">#FF0000</color>
     <color name="Black">#000000</color>
 </resources>

 //mapp全局初始化
 public class MApp extends Application {
     @Override
     public void onCreate() {
         super.onCreate();
         Fresco.initialize(this);
     }
 }

 //drawable下
 //edit.XML
 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android">
     <solid android:color="#FFFFFF" />
     <stroke
         android:width="1dip"
         android:color="#BDC7D8" />
 </shape>

 //main的XML
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
     android:orientation="vertical"
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context="com.example.hp.lianjunnan0406.MainActivity">
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="70dp"
         android:background="@color/BlueViolet">
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="購物車"
             android:textSize="25dp"
             android:layout_centerVertical="true"
             android:layout_centerHorizontal="true"
             android:layout_weight="1"
             />
         <TextView
             android:id="@+id/cart_editor"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="編輯"
             android:layout_centerVertical="true"
             android:layout_alignParentRight="true"
             android:layout_marginRight="37dp"
             />
     </RelativeLayout>

     <ExpandableListView
         android:groupIndicator="@null"
         android:layout_weight="1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:id="@+id/cart_expandable"
         >
     </ExpandableListView>
     <View
         android:layout_width="match_parent"
         android:layout_height="0.75dp"
         android:background="@color/colorPrimary"
         ></View>
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="50dp"
         android:id="@+id/gwc_item_linear"
         >
         <CheckBox
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_centerVertical="true"
             android:id="@+id/cart_checkBox"
             />
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_centerVertical="true"
             android:layout_toRightOf="@+id/cart_checkBox"
             android:text="全選/反選"/>

         <TextView
             android:id="@+id/cart_priceAll"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_centerHorizontal="true"
             android:layout_marginTop="5dp"
             android:text="總價：0.0"
             />
         <TextView
             android:text="共0件商品"
             android:id="@+id/cart_count"
             android:layout_below="@+id/cart_priceAll"
             android:layout_centerHorizontal="true"
             android:layout_marginTop="5dp"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content" />

         <Button
             android:id="@+id/cart_jiesuan"
             android:layout_width="50dp"
             android:layout_height="30dp"
             android:background="@color/White"
             android:textColor="@color/BlueViolet"
             android:layout_centerVertical="true"
             android:layout_alignParentRight="true"
             android:layout_marginRight="30dp"
             android:text="去結算" />
         <Button
             android:id="@+id/cart_delete"
             android:layout_width="50dp"
             android:layout_height="30dp"
             android:background="@color/White"
             android:textColor="@color/Red"
             android:layout_centerVertical="true"
             android:layout_toLeftOf="@+id/cart_jiesuan"
             android:visibility="invisible"
             android:text="刪除" />

     </RelativeLayout>

 </LinearLayout>

 //適配器子佈局
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout
     android:orientation="horizontal"
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="100dp">
     <CheckBox
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_centerVertical="true"
         android:id="@+id/child_box"/>
     <com.facebook.drawee.view.SimpleDraweeView
         android:id="@+id/child_img"
         android:layout_width="100dp"
         android:layout_height="100dp"
         android:layout_centerVertical="true"
         android:layout_toRightOf="@+id/child_box"
         android:background="@color/Red"
         roundAsCircle="true"/>
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:id="@+id/child_subhead"
         android:layout_toRightOf="@+id/child_img"
         android:layout_marginLeft="10dp"
         android:layout_marginTop="10dp"
         android:text="標題"
         />

     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:id="@+id/child_price"
         android:layout_toRightOf="@+id/child_img"
         android:layout_marginLeft="10dp"
         android:layout_marginTop="70dp"
         android:text="價格"
         />

     <com.example.hp.lianjunnan0406.view.AddMinusView
         android:id="@+id/child_adm"
         android:layout_width="110dp"
         android:layout_height="40dp"
         android:layout_alignParentRight="true"
         android:layout_marginRight="40dp"
         android:layout_marginTop="60dp"
         android:focusable="false"  >
     </com.example.hp.lianjunnan0406.view.AddMinusView>

 </RelativeLayout>

 //適配器父佈局
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
     android:orientation="horizontal"
     xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
     android:layout_height="match_parent">
     <CheckBox
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:id="@+id/group_box"
         />
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:id="@+id/group_name"
         />
 </LinearLayout>

 //適配器彈框
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
     android:orientation="vertical"
     xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
     android:layout_height="match_parent">
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:gravity="center_horizontal"
         android:orientation="horizontal">
         <TextView
             android:id="@+id/goods_minus"
             android:layout_width="35dp"
             android:layout_height="35dp"
             android:gravity="center"
             android:background="@drawable/shopcart_minus_grey"/>

         <EditText
             android:id="@+id/goods_num"
             android:layout_marginTop="2dp"
             android:layout_width="100dp"
             android:layout_height="35dp"
             android:background="@drawable/edit"
             android:layout_weight="0.00"
             android:gravity="center"
             android:text="1"/>
         <TextView
             android:id="@+id/goods_add"
             android:layout_width="35dp"
             android:layout_height="35dp"
             android:gravity="center"
             android:background="@drawable/shopcart_add_red"/>
     </LinearLayout>
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:gravity="center_horizontal"
         android:orientation="horizontal">
         <Button
             android:id="@+id/goods_cancel"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:background="@color/White"
             android:textColor="@color/Red"
             android:text="取消" />
         <Button
             android:id="@+id/goods_confirm"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:background="@color/White"
             android:textColor="@color/Red"
             android:text="肯定" />
     </LinearLayout>
 </LinearLayout>

 //model顯示數據
 public class ShowCartModel {
     public void showCart(String uid, final ShowCartCallback showCartCallback){
         OkHttpClient okHttpClient = new OkHttpClient.Builder()
                 .addNetworkInterceptor(new HttpLoggingInterceptor()
                         .setLevel(HttpLoggingInterceptor.Level.BODY))
                 .build();
         Retrofit retrofit = new Retrofit.Builder()
                 .client(okHttpClient)
                 .addConverterFactory(GsonConverterFactory.create())
                 .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                 .baseUrl(HttpConfig._URL).build();
         ApiService apiService = retrofit.create(ApiService.class);
         apiService.rxjavaShowCart(uid).subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<CartBean>() {
                     @Override
                     public void onSubscribe(Disposable d) {

                     }

                     @Override
                     public void onNext(CartBean value) {
                         if (value.getCode().equals("0")) {
                             showCartCallback.showCartSuccess(value);
                         }
                     }

                     @Override
                     public void onError(Throwable e) {
                         showCartCallback.failure(e);
                     }

                     @Override
                     public void onComplete() {

                     }
                 });


     }
     public interface ShowCartCallback {
         void showCartSuccess(CartBean bean);//網絡請求成功

         void failure(Throwable t);//網絡請求失敗
     }
 }

 //----------修改
 public class UpdateCartsModel {
     public void updateCarts(String uid,String sellerid,String pid,String selected,String num,final UpdateCartsCallback updateCartsCallback){
         Map<String, String> map = new HashMap<>();
         map.put("uid", uid);
         map.put("sellerid", sellerid);
         map.put("pid", pid);
         map.put("selected", selected);
         map.put("num", num);
         OkHttpClient okHttpClient = new OkHttpClient.Builder()
                 .addNetworkInterceptor(new HttpLoggingInterceptor()
                         .setLevel(HttpLoggingInterceptor.Level.BODY))
                 .build();
         Retrofit retrofit = new Retrofit.Builder()
                 .client(okHttpClient)
                 .addConverterFactory(GsonConverterFactory.create())
                 .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                 .baseUrl(HttpConfig._URL).build();
         ApiService apiService = retrofit.create(ApiService.class);
         apiService.rxjavaUpdateCarts(map).subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new Observer<AddCartBean>() {
                     @Override
                     public void onSubscribe(Disposable d) {