列表视图展开时，复选框选项已更改

Question

我检查了checkbox上的前三个expandableListView。为什么我展开listview是最后一次CheckBox检查？

private ArrayList<Group_Items> setAllData() {

    String group_titles[] = {
            "Payment of Employer and employees contribution",
            "Monthly Return Filing in Form 5 and Declaration in form 2",
            "Monthly Return Filing in Form 10",
            "Monthly Return Filing in Form 12",
            "Statement of Recovery from contractor",
            "Annual Return in Form 6A",
            "Renewal of contribution card of an employee by filing Form 3 & 3A",
            "Submission of contribution card of employees leaving services" };

    String child_info[] = {
            "We have deployed secured web services framework in accordance with OASIS standards. Please refer the user manual (Secured Web service user manual) under the help section and do the necessary changes at your end to start consuming the same. Existing web services shall be discontinued w.e.f 1-Dec-2015.",
            "Return of employees qualifying for membership",
            "Return of members leaving the services during the month",
            "Statement of contribution",
            "Self Explnatory",
            "Consolidated annual contribution statement",
            "Self Explnatory",
            "Self Explnatory" };

    String dates[] = {
            "15th of Next Month + 5 Days Grace period",
            "15th of Next Month",
            "15th of Next Month",
            "25th of Next Month",
            "7th of Next Month",
            "30th April",
            "Within one month on the expiry of contribution card currancy to the commissioner",
            "20th of Next Month" };

    ArrayList<Group_Items> list = new ArrayList<Group_Items>();
    ArrayList<Child_Items> ch_list= new ArrayList<Child_Items>();
    ch = new Child_Items();
    int i=0;
    int size=1;

    for (String group_title : group_titles) {
        Group_Items gru = new Group_Items();

        gru.setName(group_title);

        ch_list = new ArrayList<Child_Items>();
        for (; i < size; i++) {
            Child_Items ch = new Child_Items();

            ch.setChild_title(child_info[i]);
            ch.setDd("Due Date:");
            ch.setDate(dates[i]);

            ch_list.add(ch);
        }

        gru.setItems(ch_list);
        list.add(gru);
        size=size+1;
    }
    return list;
}

我在每个标题旁边创建了ExpandableListView CheckBox，当我从八个标题中检查前三或四CheckBox时，第一个groupItem被展开，然后自动最后一个（{1}} 8）检查CheckBox。

  

这是我的自定义适配器代码

public class MyBaseExpandableListAdapter extends BaseExpandableListAdapter{
Context context;
ArrayList<Group_Items> group_al;

public MyBaseExpandableListAdapter(Context context,ArrayList<Group_Items> group_al) {
    this.context=context;
    this.group_al=group_al;
}
@Override
public Object getChild(int groupPosition, int childPosition) {
    ArrayList<Child_Items> chList = group_al.get(groupPosition).getItems();

    return chList.get(childPosition);
}

@Override
public long getChildId(int groupPosition, int childPosition) {

    return childPosition;
}

@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView,
                         ViewGroup parent) {
    Child_Items ch = (Child_Items) getChild(groupPosition, childPosition);
    if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) context
                .getSystemService(context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.expandable_child_items, null);
    }
    TextView child = (TextView) convertView.findViewById(R.id.child);
    TextView dd = (TextView) convertView.findViewById(R.id.dd);
    TextView date= (TextView) convertView.findViewById(R.id.date);

    child.setText(ch.getChild_title().toString());
    dd.setText(ch.getDd().toString());
    date.setText(ch.getDate().toString());

    return convertView;
}

@Override
public int getChildrenCount(int groupPosition) {
    ArrayList<Child_Items> chList = group_al.get(groupPosition).getItems();

    return chList.size();
}

@Override
public Object getGroup(int groupPosition) {

    return group_al.get(groupPosition);
}

@Override
public int getGroupCount() {

    return group_al.size();
}

@Override
public long getGroupId(int groupPosition) {

    return groupPosition;
}

@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
    Group_Items gr = (Group_Items) getGroup(groupPosition);
    long group_id = getGroupId(groupPosition);

    if (convertView == null) {
        LayoutInflater inf = (LayoutInflater) context
                .getSystemService(context.LAYOUT_INFLATER_SERVICE);
        convertView = inf.inflate(R.layout.expandable_group_items, null);
    }

    TextView title = (TextView) convertView.findViewById(R.id.title);
    title.setText(gr.getName());
    CheckBox chk=(CheckBox) convertView.findViewById(R.id.chk);

    return convertView;
}

@Override
public boolean hasStableIds() {

    return true;
}

@Override
public boolean isChildSelectable(int arg0, int arg1) {

    return false;
}

}