public class MainActivity extends AppCompatActivity implements CartContart.CartView,YijiCallback {
   
    private void initData() {
     mQuan.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
           if (mQuan.isChecked()){
              for (CartBean.DataBean dataBean : list) {
                  dataBean.cartischecked = true;
                  for (CartBean.DataBean.ListBean listBean : dataBean.list) {
                      listBean.productischecked = true;
                    }
               }
          }else {
                for (CartBean.DataBean dataBean : list) {
                    dataBean.cartischecked = false;
                    for (CartBean.DataBean.ListBean listBean : dataBean.list) {
                       listBean.productischecked = false;
                      }
                  }
              }
              cartAdapter.notifyDataSetChanged();
             getprice();
            }
        });
    }

    private void getprice(){
        double price = 0;
        for (CartBean.DataBean dataBean : list) {
            for (CartBean.DataBean.ListBean listBean : dataBean.list) {
                if (listBean.productischecked){
                    price += listBean.price*listBean.shuliang;
                }
            }
        }
        mTvPrice.setText("￥："+price);
    }

    @Override
    public void cartsuccess(CartBean cartBean) {
        list = new ArrayList<>();
        list = cartBean.data;
        cartAdapter = new CartAdapter(this);
        cartAdapter.setYijiCallback(this);
        cartAdapter.setList(cartBean.data);
        mRecy.setAdapter(cartAdapter);
    }
    @Override
    public void notifyCart() {
        getprice();
    }
}

public class CartAdapter extends RecyclerView.Adapter<CartAdapter.Myvh> implements ErjiCallback {
    private YijiCallback yijiCallback;
    public void setYijiCallback(YijiCallback yijiCallback) {
        this.yijiCallback = yijiCallback;
    }

    @Override
    public void onBindViewHolder(@NonNull final Myvh holder, final int position) {
       
        productAdapter.setErjiCallback(this);
        holder.mCheckCart.setChecked(list.get(position).cartischecked);
        for (CartBean.DataBean.ListBean listBean : list.get(position).list) {
            listBean.pos = position;
        }
        holder.mCheckCart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                list.get(position).cartischecked = holder.mCheckCart.isChecked();
                for (CartBean.DataBean.ListBean listBean : list.get(position).list) {
                    listBean.productischecked = list.get(position).cartischecked;
                }
                notifyDataSetChanged();
                if (yijiCallback!=null){
                    yijiCallback.notifyCart();
                }
            }
        });
    }
    @Override
    public void notifyCartItem(boolean isChecked, int position) {
        list.get(position).cartischecked = isChecked;
        notifyDataSetChanged();
        if (yijiCallback!=null){
            yijiCallback.notifyCart();
        }
    }
    @Override
    public void notifyNum() {
        if (yijiCallback!=null){
            yijiCallback.notifyCart();
        }
    }
}

public interface ErjiCallback {
    void notifyCartItem(boolean isChecked,int position);
    void notifyNum();
}

public interface YijiCallback {
    void notifyCart();
}

public class ProductAdapter extends RecyclerView.Adapter<ProductAdapter.Myvh> {

    private ErjiCallback erjiCallback;
    public void setErjiCallback(ErjiCallback erjiCallback) {
        this.erjiCallback = erjiCallback;
    }

    @Override
    public void onBindViewHolder(@NonNull final Myvh holder, final int position) {
        holder.mAddview.seted_num(list.get(position).shuliang);
        holder.mCheckProduct.setChecked(list.get(position).productischecked);
        holder.mAddview.setAddminusCallback(new Addview.AddminusCallback() {
            @Override
            public void click(int num) {
                list.get(position).shuliang = num;
                if (erjiCallback!=null){
                    erjiCallback.notifyNum();
                }
            }
        });

     holder.mCheckProduct.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
           if (!holder.mCheckProduct.isChecked()){//如果没有选中
              list.get(position).productischecked=false;
              if (erjiCallback!=null){
                 erjiCallback.notifyCartItem(false,list.get(position).pos);
              }
            }else {
            list.get(position).productischecked=true;
            for (CartBean.DataBean.ListBean listBean : list) {
               if (!listBean.productischecked){
                  if (erjiCallback!=null){
                    erjiCallback.notifyCartItem(false,list.get(position).pos);
                   }
                   break;
                }
                if (erjiCallback!=null){
                    erjiCallback.notifyCartItem(true,list.get(position).pos);
                  }
               }
            }
         }
     });
   }

public class CartBean {
    public String code;
    public String msg;
    public List<DataBean> data;
    public static class DataBean {
        public String sellerName;
        public List<ListBean> list;
        public boolean cartischecked;
        public static class ListBean {
            public String images;
            public int num;
            public int price;
            public int pscid;
            public String title;
            public boolean productischecked;
            public int pos;//子条目全部选中 父条目也选中
            public int shuliang = 1; //商品数量
        }
    }
}

public class AddMinus extends LinearLayout {
   
    private void init(final Context context) {
        Addview addview = (Addview) LayoutInflater.from(context).
        inflate(R.layout.addandjian, this, true);
        
        mTvJian = addview.findViewById(R.id.tv_jian);
        mEditNum = addview.findViewById(R.id.edit_num);
        mTvJia = addview.findViewById(R.id.tv_jia);

        mTvJian.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                num--;
                if (num==0){
                    num=1;
                    Toast.makeText(context, "不能再减了", Toast.LENGTH_SHORT).show();
                }
                mEditNum.setText(num+"");
                if (addminusCallback!=null){
                    addminusCallback.click(num);
                }
            }
        });
        mTvJia.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                num++;
                mEditNum.setText(num+"");
                if (addminusCallback!=null){
                    addminusCallback.click(num);
                }
            }
        });
    }

    public void seted_num(int num){
        mEditNum.setText(num+"");
    }

    private AddminusCallback addminusCallback;
    public void setAddminusCallback(AddminusCallback addminusCallback) {
        this.addminusCallback = addminusCallback;
    }

    public interface AddminusCallback{
        void click(int num);
    }
}