具有不同 children 的可扩展列表视图

Question

我正在尝试制作每个组的最后一个 child 并编辑文本和按钮。我正在使用自定义 ExpandableListViewAdapter。这是我目前所拥有的。

  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(Resource.Layout.Children, null);
        }
        if (isLastChild==true)
        {
            EditText Submit = convertView.FindViewById<EditText>(Resource.Id.Submit);
            Button button = convertView.FindViewById<Button>(Resource.Id.Button);
            TextView textViewItem = convertView.FindViewById<TextView>(Resource.Id.DataValue);
            textViewItem.Visibility = ViewStates.Gone;
        }

        else {
            TextView textViewItem = convertView.FindViewById<TextView>(Resource.Id.DataValue);
            EditText Submit = convertView.FindViewById<EditText>(Resource.Id.Submit);
            Button button = convertView.FindViewById<Button>(Resource.Id.Button);
            button.Visibility = ViewStates.Gone;
            Submit.Visibility = ViewStates.Gone;
            string content = (string)GetChild(groupPosition, childPosition);
            textViewItem.Text = content;
        }
        return convertView;
    }

这有助于放置 EditText 和 Button，但仅限于第一组，同时还切断了第一组中的一些 children。

Answer 1

This helps put a EditText and Button but only in the first group while also cutting off some of the children in the first group.

ExpandableListView 重用子视图，因此如果您希望最后一行成为您的按钮和编辑文本，您需要明确地将其设置为可见。只需在您的 GetChildView 方法中添加三行代码：

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(Resource.Layout.Children, null);
    }
    if (isLastChild == true)
    {
        EditText Submit = convertView.FindViewById<EditText>(Resource.Id.Submit);
        Button button = convertView.FindViewById<Button>(Resource.Id.Button);

        //add below two lines to your codes
        Submit.Visibility = ViewStates.Visible;
        button.Visibility = ViewStates.Visible;

        TextView textViewItem = convertView.FindViewById<TextView>(Resource.Id.DataValue);
        textViewItem.Visibility = ViewStates.Gone;
    }
    else
    {
        TextView textViewItem = convertView.FindViewById<TextView>(Resource.Id.DataValue);
        EditText Submit = convertView.FindViewById<EditText>(Resource.Id.Submit);
        Button button = convertView.FindViewById<Button>(Resource.Id.Button);
        button.Visibility = ViewStates.Gone;
        Submit.Visibility = ViewStates.Gone;
        //also add below line of codes
        textViewItem.Visibility = ViewStates.Visible;

        string content = (string)GetChild(groupPosition, childPosition);
        textViewItem.Text = content;
    }
    return convertView;
}

具有不同 children 的可扩展列表视图

Expandable List view with different children

xamarin

xamarin.android

expandablelistview