如何为没有子项的组隐藏ExpandableListView指示器

Question

  

可能重复：
  ExpandableListView - hide indicator for groups with no children

隐藏没有孩子的群组的指标

main.xml中

<ExpandableListView 
android:id="@+id/elv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:groupIndicator="@drawable/selector">
</ExpandableListView>

selector.xml

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_empty="true" android:drawable="@android:color/transparent"/>
    <item android:state_expanded="true" android:drawable="@drawable/expanded" />
    <item android:drawable="@drawable/collapse" />
</selector>

它对我的ICS不起作用，似乎所有已折叠组的状态都为空

Answer 1

试试这个：

getExpandableListView().setGroupIndicator(null);

否则，

if ( getChildrenCount( groupPosition ) == 0 ) {
       indicator.setVisibility( View.INVISIBLE );
    } 
else {
       indicator.setVisibility( View.VISIBLE );
       indicator.setImageResource( isExpanded ? R.drawable.group_expanded : R.drawable.group_closed );
    }