1
我在我的布局ListView,EditText,Button中有3个组件。 当用户在edittext中输入文本并点击按钮时,应用程序会进行一次Api调用,我刚刚添加的文本将添加到现有列表中,并获取项目列表。现在,我的问题是,API调用是成功的,我正确地使用我的新项目获得列表。但是当我在列表视图中显示它时,ListView中的第一项是不可见的。我在第一个文本之后添加的文本可以正常显示,即使我有一个包含10个或更多项目的列表,第一个项目也不会显示。另外,Iam在scrollview中显示listview和其他组件以获取全长。ListView第一项不可见/更新Android
这里是我的代码: -
public class ItemListAdapter : BaseAdapter
{
public ItemListAdapter(Activities.Detail detail, List<Models.ListOfItems> itemList)
{
// TODO: Complete member initialization
this.detail = detail;
this.itemList = itemList;
inflater = detail.LayoutInflater;
}
public override int Count
{
get { return itemList.Count; }
}
public override Java.Lang.Object GetItem(int position)
{
return position;
}
public override long GetItemId(int position)
{
return position;
}
public override View GetView(int position, View convertView, ViewGroup parent)
{
if (convertView == null)
{
convertView = inflater.Inflate(Resource.Layout.item_row_layout, null);
}
txtAuthorName = convertView.FindViewById<TextView>(Resource.Id.txtCommentAuthor);
txtItemName = convertView.FindViewById<TextView>(Resource.Id.txtTime);
txtItemDate = convertView.FindViewById<TextView>(Resource.Id.txtItemDate);
var mData = itemList.ElementAt(position);
txtAuthorName.Text = mData.AuthorDisplayName;
txtItemName.Text = DateTime.Parse(mData.DateUpdated).ToString("dd MMMM yyyy", CultureInfo.InvariantCulture);
txtItemDate.Text = mData.Text;
return convertView;
}
}
代码列表视图采取全高: -
public static void SetListViewHeightBasedOnChildren(ListView listView)
{
IListAdapter listAdapter = listView.Adapter;
if (listAdapter == null)
return;
int desiredWidth = Android.Views.View.MeasureSpec.MakeMeasureSpec(listView.Width, MeasureSpecMode.Unspecified);
int totalHeight = 0;
View view = null;
for (int i = 0; i < listAdapter.Count; i++)
{
view = listAdapter.GetView(i, view, listView);
if (i == 0)
view.LayoutParameters = new ViewGroup.LayoutParams(desiredWidth, ViewGroup.LayoutParams.WrapContent);
totalHeight += view.MeasuredHeight;
view.Measure(desiredWidth, totalHeight);
}
ViewGroup.LayoutParams param = listView.LayoutParameters;
param.Height = totalHeight + (listView.DividerHeight * (listAdapter.Count - 1));
listView.LayoutParameters = param;
listView.RequestLayout();
}
完美的解决方案。保存了我的一天。谢谢。 –