Question

Screnshot当我从CheckBoxes检查前三个ExpandableListView并从中展开第一个或第二个项目然后第二个CheckBox自动取消选中最后CheckBox自动已检查

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;
}

}

Answer 1

您可以将SparseBooleanArray用于此

在你的适配器中，初始化并保留一个稀疏的布尔数组

SparseBooleanArray mSelections = new SparseBooleanArray();

在getGroupView中，执行以下操作

@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);
       // adding onClick listener on CheckBox for the very first time
       CheckBox chk=(CheckBox) convertView.findViewById(R.id.chk);
       chk.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                int position = (int) v.getTag();
                mSelections.put(position, !mSelections.get(position, false));
                ((CheckBox)v).setChecked(mSelections.get(position, false));
            }

       });
    }

    TextView title = (TextView) convertView.findViewById(R.id.title);
    title.setText(gr.getName());
    CheckBox chk=(CheckBox) convertView.findViewById(R.id.chk);
    chk.setTag(groupPosition);
    // reassigning checkbox to its ticked state
    chk.setChecked(mSelections.get(groupPosition, false));

    return convertView;
}

单击可展开的ListView时，选中Checkbox将自动取消选中，并选中Last CheckBox

1 个答案: