mvp+okhttp+购物车逻辑 实现RecyclerView商家嵌套RecyclerView商品+接口回调

MainActivity进行结算和勾选的算法

package com.bawei.myshopcar.activity;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.widget.CheckBox;
import android.widget.TextView;

import com.bawei.myshopcar.Apis;
import com.bawei.myshopcar.Bean.ShopBean;
import com.bawei.myshopcar.Bean.ShopTypeBean;
import com.bawei.myshopcar.Constants;
import com.bawei.myshopcar.R;
import com.bawei.myshopcar.adapter.ShopAdapter;
import com.bawei.myshopcar.adapter.ShopTypeAdapter;
import com.bawei.myshopcar.presenter.IPresenterImpl;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ShopCarActivity extends AppCompatActivity implements IView, View.OnClickListener {
private ShopAdapter mShopAdapter;
private CheckBox mIvCircle;
private List<ShopBean.DataBean> mList = new ArrayList<>();
private TextView mAllPriceTxt, nSumPrice;
private IPresenterImpl mIPresenterImpl;
private RecyclerView mRecyclerView;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_product_list);

    mIPresenterImpl = new IPresenterImpl(this);
    initView();
    getData();
}

@Override
protected void onDestroy() {
    super.onDestroy();
    mIPresenterImpl.onDetach();
}

private void initView() {
    mIvCircle = (CheckBox) findViewById(R.id.iv_cricle);
    mAllPriceTxt = (TextView) findViewById(R.id.all_price);
    nSumPrice = (TextView) findViewById(R.id.sum_price_txt);
    mIvCircle.setOnClickListener(this);

    mRecyclerView = (RecyclerView) findViewById(R.id.recyclerview);
    LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
    linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
    mRecyclerView.setLayoutManager(linearLayoutManager);
    mShopAdapter = new ShopAdapter(this);
    mRecyclerView.setAdapter(mShopAdapter);

    mShopAdapter.setListener(new ShopAdapter.ShopCallBackListener() {
        @Override
        public void callBack(List<ShopBean.DataBean> list) {
            //在这里重新遍历已经改状态后的数据，
            // 这里不能break跳出，因为还需要计算后面点击商品的价格和数目，所以必须跑完整个循环
            double totalPrice = 0;

            //勾选商品的数量，不是该商品购买的数量
            int num = 0;
            //所有商品总数，和上面的数量做比对，如果两者相等，则说明全选
            int totalNum = 0;
            for (int a = 0; a < list.size(); a++) {
                //获取商家里商品
                List<ShopBean.DataBean.ListBean> listAll = list.get(a).getList();
                for (int i = 0; i < listAll.size(); i++) {
                    totalNum = totalNum + listAll.get(i).getNum();
                    //取选中的状态
                    if (listAll.get(i).isCheck()) {
                        totalPrice = totalPrice + (listAll.get(i).getPrice() * listAll.get(i).getNum());
                        num = num + listAll.get(i).getNum();
                    }
                }
            }

            if (num < totalNum) {
                //不是全部选中
                mIvCircle.setChecked(false);
            } else {
                //是全部选中
                mIvCircle.setChecked(true);
            }

            mAllPriceTxt.setText("合计：" + totalPrice);
            nSumPrice.setText("去结算(" + num + ")");
        }
    });
}

private void getData() {
    Map<String, String> map = new HashMap<>();
    map.put(Constants.MAP_KEY_GET_PRODUCT_UID, "71");
    mIPresenterImpl.startRequest(Apis.URL_GET_SHOP_CAR_INFO, map, ShopBean.class);
}

@Override
public void showResponseData(Object data) {
    if (data instanceof ShopBean) {
        ShopBean shopBean = (ShopBean) data;
        mList = shopBean.getData();
        if (mList != null) {
            mList.remove(0);
            mShopAdapter.setList(mList);
        }
    }
}

@Override
public void showResponseFail(Object data) {

}

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.iv_cricle:
            checkSeller(mIvCircle.isChecked());
            mShopAdapter.notifyDataSetChanged();
            break;
        default:

    }
}

/**
 * 修改选中状态，获取价格和数量
 */
private void checkSeller(boolean bool) {
    double totalPrice = 0;
    int num = 0;
    for (int a = 0; a < mList.size(); a++) {
        //遍历商家，改变状态
        ShopBean.DataBean dataBean = mList.get(a);
        dataBean.setCheck(bool);

        List<ShopBean.DataBean.ListBean> listAll = mList.get(a).getList();
        for (int i = 0; i < listAll.size(); i++) {
            //遍历商品，改变状态
            listAll.get(i).setCheck(bool);
            totalPrice = totalPrice + (listAll.get(i).getPrice() * listAll.get(i).getNum());
            num = num + listAll.get(i).getNum();
        }
    }

    if (bool) {
        mAllPriceTxt.setText("合计：" + totalPrice);
        nSumPrice.setText("去结算(" + num + ")");
    } else {
        mAllPriceTxt.setText("合计：0.00");
        nSumPrice.setText("去结算(0)");
    }

}

}

商家适配器 帮顶视图的时候嵌套商品的RecyclerView

package com.bawei.myshopcar.adapter;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.TextView;

import com.bawei.myshopcar.Bean.ShopBean;
import com.bawei.myshopcar.R;

import java.util.ArrayList;
import java.util.List;

/**

• 展示商家的适配器
  */
  public class ShopAdapter extends RecyclerView.Adapter<ShopAdapter.MyViewHolder> {
  private List<ShopBean.DataBean> mList = new ArrayList<>();
  private Context mContext;

  public ShopAdapter(Context context) {
  this.mContext = context;
  }

  @NonNull
  @Override
  public ShopAdapter.MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
  View view = View.inflate(mContext, R.layout.shop_seller_car_adapter, null);
  MyViewHolder myViewHoler = new MyViewHolder(view);
  return myViewHoler;
  }

  @Override
  public void onBindViewHolder(@NonNull final ShopAdapter.MyViewHolder myViewHolder, final int i) {
  //设置商家的名字
  myViewHolder.mSellerName.setText(mList.get(i).getSellerName());
  final ProductsAdapter productsAdapter = new ProductsAdapter(mContext, mList.get(i).getList());
  LinearLayoutManager linearLayoutManager = new LinearLayoutManager(mContext);
  myViewHolder.mRecyclerView.setLayoutManager(linearLayoutManager);
  myViewHolder.mRecyclerView.setAdapter(productsAdapter);

   myViewHolder.mCheck.setChecked(mList.get(i).isCheck());
  
   productsAdapter.setListener(new ProductsAdapter.ShopCallBackListener() {
       @Override
       public void callBack() {
           //从商品适配里回调回来，回给activity，activity计算价格和数量
           if(mShopCallBackListener != null) {
               mShopCallBackListener.callBack(mList);
           }
  
           List<ShopBean.DataBean.ListBean> listBeans = mList.get(i).getList();
           //创建一个临时的标志位，用来记录现在点击的状态
           boolean isAllChecked = true;
           for (ShopBean.DataBean.ListBean bean : listBeans) {
               if (!bean.isCheck()) {
                   //只要有一个商品未选中，标志位设置成false，并且跳出循环
                   isAllChecked = false;
                   break;
               }
           }
  
           //刷新商家的状态
           myViewHolder.mCheck.setChecked(isAllChecked);
           mList.get(i).setCheck(isAllChecked);
       }
   });
  
   //监听checkBox的点击事件
   //目的是改变旗下所有商品的选中状态
   myViewHolder.mCheck.setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View v) {
           //首先改变自己的标志位
           mList.get(i).setCheck(myViewHolder.mCheck.isChecked());
           //调用产品adapter的方法，用来全选和反选
           productsAdapter.selectOrRemoveAll(myViewHolder.mCheck.isChecked());
       }
   });
  

  }

  @Override
  public int getItemCount() {
  return mList.size();
  }

  public void setList(List<ShopBean.DataBean> list) {
  this.mList = list;
  notifyDataSetChanged();
  }

  public class MyViewHolder extends RecyclerView.ViewHolder {
  RecyclerView mRecyclerView;
  TextView mSellerName;
  CheckBox mCheck;

   public MyViewHolder(@NonNull View itemView) {
       super(itemView);
       mSellerName = (TextView) itemView.findViewById(R.id.tv_shop);
       mCheck = itemView.findViewById(R.id.check_shop);
       mRecyclerView = (RecyclerView) itemView.findViewById(R.id.recycler_shop);
   }
  

  }

  private ShopCallBackListener mShopCallBackListener;

  public void setListener(ShopCallBackListener listener) {
  this.mShopCallBackListener = listener;
  }

  public interface ShopCallBackListener {
  void callBack(List<ShopBean.DataBean> list);
  }
  }

商品适配器

package com.bawei.myshopcar.adapter;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.TextView;

import com.bawei.myshopcar.Bean.ShopBean;
import com.bawei.myshopcar.R;
import com.bawei.myshopcar.view.CustomCounterView;
import com.bumptech.glide.Glide;

import java.util.ArrayList;
import java.util.List;

/**

• 展示商家里的商品
  */
  public class ProductsAdapter extends RecyclerView.Adapter<ProductsAdapter.MyViewHolder> {
  private Context mContext;
  private List<ShopBean.DataBean.ListBean> mList = new ArrayList<>();

  public ProductsAdapter(Context context, List<ShopBean.DataBean.ListBean> list) {
  this.mContext = context;
  this.mList = list;
  }

  @NonNull
  @Override
  public ProductsAdapter.MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
  View view = View.inflate(mContext, R.layout.shop_car_adapter, null);
  MyViewHolder myViewHolder = new MyViewHolder(view);
  return myViewHolder;
  }

  @Override
  public void onBindViewHolder(@NonNull ProductsAdapter.MyViewHolder myViewHolder, final int i) {
  String url = mList.get(i).getImages().split("\|")[0].replace(“https”, “http”);
  Glide.with(mContext).load(url).into(myViewHolder.mImage);

   myViewHolder.mTitle.setText(mList.get(i).getTitle());
   myViewHolder.mPrice.setText(mList.get(i).getPrice() + "");
  
   //根据我记录的状态，改变勾选
   myViewHolder.mCheckBox.setChecked(mList.get(i).isCheck());
  
   //商品的跟商家的有所不同，商品添加了选中改变的监听
   myViewHolder.mCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
       @Override
       public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
           //优先改变自己的状态
           mList.get(i).setCheck(isChecked);
           //回调，目的是告诉activity，有人选中状态被改变
           if (mShopCallBackListener != null) {
               mShopCallBackListener.callBack();
           }
       }
   });
  
   //设置自定义View里的Edit
   myViewHolder.mCustomShopCarPrice.setData(this, mList, i);
   myViewHolder.mCustomShopCarPrice.setOnCallBack(new CustomCounterView.CallBackListener() {
       @Override
       public void callBack() {
           if (mShopCallBackListener != null) {
               mShopCallBackListener.callBack();
           }
       }
   });
  

  }

  @Override
  public int getItemCount() {
  return mList.size();
  }

  public class MyViewHolder extends RecyclerView.ViewHolder {
  CustomCounterView mCustomShopCarPrice;
  TextView mTitle, mPrice;
  ImageView mImage;
  CheckBox mCheckBox;

   public MyViewHolder(@NonNull View itemView) {
       super(itemView);
       mImage = (ImageView) itemView.findViewById(R.id.iv_product);
       mTitle = (TextView) itemView.findViewById(R.id.tv_product_title);
       mPrice = (TextView) itemView.findViewById(R.id.tv_product_price);
       mCheckBox = (CheckBox) itemView.findViewById(R.id.check_product);
       mCustomShopCarPrice = (CustomCounterView) itemView.findViewById(R.id.custom_product_counter);
   }
  

  }

  /**

  • 在我们子商品的adapter中，修改子商品的全选和反选

  • @param isSelectAll
    */
    public void selectOrRemoveAll(boolean isSelectAll) {
    for (ShopBean.DataBean.ListBean listBean : mList) {
    listBean.setCheck(isSelectAll);
    }

    notifyDataSetChanged();
    }

  private ShopCallBackListener mShopCallBackListener;

  public void setListener(ShopCallBackListener listener) {
  this.mShopCallBackListener = listener;
  }

  public interface ShopCallBackListener {
  void callBack();
  }
  }