Android ExpandableListView group的item有间距child间隔不变

   <ExpandableListView
        android:id="@+id/lv"
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:background="@null"
        android:childDivider="#00000000"
        android:dividerHeight="10dp"
        android:groupIndicator="@null"
        android:listSelector="#00000000" />

android:dividerHeight="10dp"设置的话 group和child都有间距