我正在设置ExpandableListView
的事件处理程序。我目前有一个组点击事件和一个展开事件。
private void ListView_GroupExpand(object sender, ExpandableListView.GroupExpandEventArgs e)
{
var dialogBuilder = new AlertDialog.Builder(this);
dialogBuilder.SetTitle(Resource.String.group_title);
dialogBuilder.SetMessage(string.Format("Expanded group {0}", e.GroupPosition));
dialogBuilder.Create().Show();
}
private void ListView_GroupClick(object sender, ExpandableListView.GroupClickEventArgs e)
{
var dialogBuilder = new AlertDialog.Builder(this);
dialogBuilder.SetTitle(Resource.String.group_title);
dialogBuilder.SetMessage(string.Format("Clicked group {0}", e.GroupPosition));
dialogBuilder.Create().Show();
}
当我单击列表中的组标题时,会触发click事件,但不会触发expand事件。如果我点击左边的小扩展克拉或者只是点击列表项目的中间,这没关系。
是否有任何设置视图的方法,以便点击克拉只会触发展开事件(而不是点击事件),反之亦然点击列表项的中间?如果单击克拉或列表项的中间是同一个东西,(怎么样)我可以得到扩展和点击处理程序来启动?或者我只选择一个而不是另一个?
答案 0 :(得分:2)
有没有办法设置视图,以便点击克拉只会触发展开事件(而不是点击事件),反之亦然点击列表项的中间?
首先,您可以为组标题创建自己的指标:
<ExpandableListView
android:id="@+id/myExpandableListview"
android:groupIndicator="@null"
android:minWidth="25px"
android:minHeight="25px"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
并创建标题布局,例如:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:layout_height="50dp"
android:layout_width="50dp"
android:id="@+id/indicator"
android:src="@drawable/downicon" />
<TextView
android:id="@+id/DataHeader"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="DataHeader"
android:layout_margin="2dp"
android:textStyle="bold"
android:paddingStart="50dp"
android:paddingLeft="50dp" />
</LinearLayout>
然后创建您的ExpandableDataAdapter
,例如:
public class ExpandableDataAdapter : BaseExpandableListAdapter
{
private readonly Activity Context;
private ExpandableListView _listview;
public ExpandableDataAdapter(Activity newContext, List<Data> newList, ExpandableListView listview) : base()
{
Context = newContext;
DataList = newList;
_listview = listview;
}
protected List<Data> DataList { get; set; }
public override View GetGroupView(int groupPosition, bool isExpanded, View convertView, ViewGroup parent)
{
MyViewHolder holder;
var view = convertView;
if (view != null)
holder = view.Tag as MyViewHolder;
holder = new MyViewHolder();
view = Context.LayoutInflater.Inflate(Resource.Layout.ListGroup, null);
holder.Header = view.FindViewById<TextView>(Resource.Id.DataHeader);
holder.Indicator = view.FindViewById<ImageView>(Resource.Id.indicator);
view.Tag = holder;
holder.Header.Text = ((char)(65 + groupPosition)).ToString();
holder.Indicator.Click += (sender, e) =>
{
if (!isExpanded)
{
_listview.ExpandGroup(groupPosition);
}
else
{
_listview.CollapseGroup(groupPosition);
}
};
return view;
}
private class MyViewHolder : Java.Lang.Object
{
public TextView Header { get; set; }
public ImageView Indicator { get; set; }
}
//...And more other code here
}
最后使用此适配器,例如:
var adapter = new ExpandableDataAdapter(this, Data.SampleData(), listView);
现在,您可以单击每个标题项的指标图像以展开列表: