代码之家 › 专栏 › 技术社区 › S. Cvija

具有不同子级的可扩展列表视图

expandablelistview xamarin.android xamarin

-1

S. Cvija · 技术社区 · 8 年前

  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;
    }

1 回复 | 直到 8 年前

1

Elvis Xia - MSFT 8 年前

这有助于放置编辑文本和按钮,但只在第一组中,同时也切断了第一组中的一些孩子。

ExpandableListView 重用子视图,因此如果希望最后一行是按钮和编辑文本,则需要将其显式设置为可见。只需将三行代码添加到 GetChildView

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;
}