Question

我想向用户显示所有单元及其所有子单元的列表，以便在ExpandableListView中进行选择，以便检查他们想要移动的单元。因为看起来ListView中的可点击视图阻止它自然地扩展和折叠，所以我将简单地允许CheckedChange事件基于groupPosition进行扩展/折叠。但是当我更改一个CheckBox上的检查时，几个或所有组都会响应，而不仅仅是我点击的组。

equiplistparent.axml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="35dp"
android:gravity="center_vertical">
<CheckBox
    android:id="@+id/check"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="45dp" />
<TextView
    android:id="@+id/info"
    android:layout_width="300dp"
    android:layout_height="wrap_content"
    android:layout_margin="5dp"
    android:textSize="20dp"
    android:gravity="left" />
<AutoCompleteTextView
    android:id="@+id/sites"
    android:layout_width="100dp"
    android:layout_height="wrap_content"
    android:textSize="20dp"
    android:textColor="@android:color/black"
    android:background="@android:color/white"
    android:layout_margin="5dp"
    android:textCursorDrawable="@null"
    android:gravity="center_horizontal"
    android:hint="To Store" />
</LinearLayout>

自定义适配器

class EquipAdapter : BaseExpandableListAdapter
{
    private string[] Parent { get; set; }
    private List<List<CPEquipment>> Child { get; set; }
    private Context _context { get; set; }
    private IListAdapter _adapter { get; set; }
    private ExpandableListView _list { get; set; }

    public EquipAdapter(Context context, List<string> parent, List<List<CPEquipment>> child, IListAdapter adapter, ExpandableListView list)
    {
        _context = context;
        Parent = parent.ToArray();
        Child = child;
        _adapter = adapter;
        _list = list;
    }

    public override Object GetChild(int groupPosition, int childPosition)
    {
        List<CPEquipment> level1 = Child.ElementAt(groupPosition);
        CPEquipment level2 = level1.ElementAt(childPosition);

        return level2.Serial + " " + level2.Model;
    }

    public override long GetChildId(int groupPosition, int childPosition)
    {
        return Convert.ToInt32(groupPosition.ToString(CultureInfo.InvariantCulture) + childPosition.ToString(CultureInfo.InvariantCulture));
    }

    public override int GetChildrenCount(int groupPosition)
    {
        return Child.ElementAt(groupPosition).Count;
    }

    public override View GetChildView(int groupPosition, int childPosition, bool isLastChild, View convertView, ViewGroup parent)
    {
        if (convertView == null)
        {
            LayoutInflater inflater = (LayoutInflater) _context.GetSystemService(Context.LayoutInflaterService);
            convertView = inflater.Inflate(Android.Resource.Layout.SimpleExpandableListItem2, null);
        }

        TextView text = (TextView) convertView.FindViewById(Android.Resource.Id.Text2);
        text.Text = GetChild(groupPosition, childPosition).ToString();

        return convertView;
    }

    public override Object GetGroup(int groupPosition)
    {
        return Parent[groupPosition];
    }

    public override long GetGroupId(int groupPosition)
    {
        return groupPosition;
    }

    public override View GetGroupView(int groupPosition, bool isExpanded, View convertView, ViewGroup parent)
    {
        if (convertView == null)
        {
            LayoutInflater inflater = (LayoutInflater) _context.GetSystemService(Context.LayoutInflaterService);
            convertView = inflater.Inflate(Resource.Layout.equiplistparent, null);
        }

        TextView info = (TextView) convertView.FindViewById(Resource.Id.info);
        info.Text = GetGroup(groupPosition).ToString();
        AutoCompleteTextView acText = (AutoCompleteTextView) convertView.FindViewById(Resource.Id.sites);
        acText.Adapter = _adapter;

        CheckBox check = (CheckBox) convertView.FindViewById(Resource.Id.check);
        check.CheckedChange += (o, args) =>
                                   {
                                       int currGroup = groupPosition;
                                       if (args.IsChecked)
                                           _list.ExpandGroup(currGroup);
                                       else
                                       {
                                           _list.CollapseGroup(currGroup);
                                       }
                                   };
        return convertView;
    }

    public override bool IsChildSelectable(int groupPosition, int childPosition)
    {
        return true;
    }

    public override int GroupCount
    {
        get { return Parent.Length; }
    }

    public override bool HasStableIds
    {
        get { return true; }
    }

}

我尝试使用this suggestion解决此问题，但它在ListViews自然展开或折叠的能力方面没有任何区别。

我尝试将复选框放在子项而不是父项中，只是强制所有组都打开。但是现在如果我检查了3个盒子，那么另外3个盒子会随机检查自己。我知道有一种方法可以在ListViews中使用复选框，但它们的行为并不像我预期的那样。这是MonoDroid的一个问题吗？

Answer 1

我最近刚刚经历过这个问题，并最终在我的最后完成了这一切。我发布了原始问题here以及我的最终解决方案，以使一切正常运行。不确定这是否会帮助你，但听起来很接近我遇到的问题并使用我的解决方案，我能够让它正常工作。

以编程方式展开/折叠组

1 个答案: