购物车MainActivity

package com.test.expandablelistview;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.CheckBox;
import android.widget.ExpandableListView;
import android.widget.TextView;

import java.util.List;

import static android.R.id.list;

public class MainActivity extends AppCompatActivity {

private ExpandableListView listview;private MyAdpater adpater;private TextView checked_shop;private TextView price;List<Shangjia> shangjias;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);  /*  //点击事件    boolean isCheked = shangjias.get(0).getShangPinList().get(0).isCheked;    shangjias.get(0).getShangPinList().get(0).setCheked(!isCheked);    change();*/    setContentView(R.layout.activity_main);    listview = (ExpandableListView) findViewById(R.id.listview);    adpater = new MyAdpater(this);    listview.setAdapter(adpater);    final CheckBox checkAll = (CheckBox) findViewById(R.id.checkAll);    price = (TextView) findViewById(R.id.price);    checked_shop = (TextView) findViewById(R.id.checked_shop);    checkAll.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View v) {            //设置商品全部选中            adpater.checkAllShop(checkAll.isChecked());            //计算选中的价格和数量            String shopPrice = adpater.getShopPrice();            //判断商品是否全部选中            boolean b = adpater.selectAll();            String[] split = shopPrice.split(",");            price.setText(split[0]);            checked_shop.setText(split[1]);            checkAll.setChecked(b);        }    });    adpater.getAdapterData(new MyAdpater.AdapterData() {        @Override        public void Data(View v, String str, boolean b) {            String[] split = str.split(",");            price.setText(split[0]);            checked_shop.setText(split[1]);            checkAll.setChecked(b);        }    });    checkAll.setChecked(adpater.selectAll());    adpater.notifyDataSetChanged();}/*//点击二级列表的时候调用这个方法public void change() {    //// TODO: 2017/9/21  去遍历这个商品,是否所有商品被选中    boolean isAllShngpingChecked = false;    Shangjia shangjia = shangjias.get(0);    for (int i = 0; i < shangjia.getShangPinList().size(); i++) {    }    shangjia.setChcked(isAllShngpingChecked);    //todo 去遍历所有商家    boolean isAllShngjiaChecked = false;    for (int i = 0; i < shangjias.size(); i++) {    }    //// TODO: 2017/9/21   根据isAllShngjiaChecked通知外边的那个checkbox改变状态}//点击二级列表的时候调用这个方法public void dianjiYIjiLIbiao() {    Shangjia shangjia = shangjias.get(0);    boolean isChcked = shangjia.isChcked;    //// TODO: 2017/9/21 遍历当前商家商品的状态    List<ShangPin> shangPinList = shangjias.get(0).getShangPinList();    for (int i = 0; i < shangPinList.size(); i++) {        shangPinList.get(i).setCheked(!isChcked);    }    change();}//点击全选按钮//// TODO: 2017/9/21  在activityd中有一个boolean值boolean isAllCheckedActivity = false;//根据isAllCheckedActivity  取非//// TODO: 2017/9/21   区把商品的所有状态都变了之后 调用   change();

*/
}