Android制作简单的普通购物车

public class MyExpandAdapter extends BaseExpandableListAdapter {//红色部分的数据源List<OrderDetailsEntity> group_head = new ArrayList();//内层部分数据源List<List<ProductDetails>> child = new ArrayList();Context context;LayoutInflater inflater;public MyExpandAdapter(Context content) { // 初始化组、子列表项 group_head = new ArrayList<OrderDetailsEntity>(); child = new ArrayList<List<ProductDetails>>(); inflater = LayoutInflater.from(context);}public MyExpandAdapter(Context context, List<OrderDetailsEntity> group_head, List<List<ProductDetails>> child) { this.context = context; // 初始化组、子列表项 this.group_head = group_head; this.child = child; inflater = LayoutInflater.from(context);}/****************************跟普通adapter一样******************************/@Overridepublic int getGroupCount() { return this.group_head.size();}@Overridepublic int getChildrenCount(int position) { if (position < 0 || position >= this.child.size()) return 0; return child.get(position).size();}@Overridepublic OrderDetailsEntity getGroup(int groupPosition) { return group_head.get(groupPosition);}@Overridepublic ProductDetails getChild(int groupPosition, int childPosition) { return child.get(groupPosition).get(childPosition);}@Overridepublic long getGroupId(int groupPosition) { return groupPosition;}@Overridepublic long getChildId(int groupPosition, int childPosition) { return childPosition;}/**************************************************************************/@Overridepublic boolean hasStableIds() {//分组和子选项是否持有稳定的ID, 就是说底层数据的改变会不会影响到它们 return true;}private boolean isSelectAll(OrderDetailsEntity entity) { int count = 0; for (ProductDetails p : entity.getProductDetails()) { if (p.isChecked()) { count++; } } return entity.getProductDetails().size() == count;}/*************************与普通adapter的getView方法一样**********************/@Overridepublic View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { ViewHolderGroup group; if (convertView == null) { convertView = inflater.inflate(R.layout.item, parent, false); group = new ViewHolderGroup(); group.cb_all = (CheckBox) convertView.findViewById(R.id.cb_checkAll); group.tv_name = (TextView) convertView.findViewById(R.id.tv_name); convertView.setTag(group); } else { group = (ViewHolderGroup) convertView.getTag(); } group.tv_name.setText( group_head.get(groupPosition).getMemberId() + "," + group_head.get(groupPosition).getShopName()); group.cb_all.setChecked(isSelectAll(getGroup(groupPosition))); return convertView;}@Overridepublic View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { ViewHolderChild childV; if (convertView == null) { convertView = inflater.inflate(R.layout.item_inner, parent, false); childV = new ViewHolderChild(); childV.cb = (CheckBox) convertView.findViewById(R.id.cb_check); childV.iv = (ImageView) convertView.findViewById(R.id.iv_img); childV.name = (TextView) convertView.findViewById(R.id.name); convertView.setTag(childV); } else { childV = (ViewHolderChild) convertView.getTag(); } childV.name.setText(getChild(groupPosition, childPosition).getProductName()); childV.cb.setChecked(getChild(groupPosition, childPosition).isChecked()); return convertView;}/****************************************************************************/@Overridepublic boolean isChildSelectable(int groupPosition, int childPosition) { //// 指定位置的子视图是否可选择。 // 调用Activity里的ChildSelect方法 // Toast.makeText(context, "gp="+groupPosition+",cp="+childPosition, // Toast.LENGTH_LONG).show(); return true;}static class ViewHolderGroup { CheckBox cb_all; TextView tv_name;}static class ViewHolderChild { CheckBox cb; ImageView iv; TextView name;}}

for (int i = 0; i < adapter.getGroupCount(); i++) { sp_date_list.expandGroup(i); }

// 设置分组项的点击监听事件expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {@Overridepublic boolean onGroupClick(ExpandableListView expandableListView, View view, int i, long l) { Toast.makeText(getApplicationContext(), groupStrings[i], Toast.LENGTH_SHORT).show(); //如果处理事件，return true,默认return false return false;}// 设置子选项点击监听事件expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {@Overridepublic boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { Toast.makeText(getApplicationContext(), childStrings[groupPosition][childPosition], Toast.LENGTHshow(); return true;}});