ExpandableListView设置选中child的背景

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/ract_bg"
    android:orientation="vertical" >

    <ExpandableListView
        android:id="@+id/listview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:childDivider="#885D7081"
        android:choiceMode="singleChoice"
        android:divider="#88455869"
        android:dividerHeight="1px"
        android:groupIndicator="@null"
        android:listSelector="#00000000"
        android:scrollingCache="false" />

</LinearLayout>

说明：需要定义android:listSelector="#00000000"关闭点击的效果，android:choiceMode="singleChoice"设为单选模式

charge_expandable_fragment_group_item.xml

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="60dp"
    android:background="#88506475"
    android:gravity="center_vertical"
    android:minHeight="60dp"
    android:orientation="horizontal" >

    <ImageView
        android:id="@+id/group_indicator"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:src="@drawable/expander_arrow_collapse" />

    <TextView
        android:id="@+id/group_textview"
        style="@style/WhiteLargeNormalStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="left|center_vertical"
        android:text="父元素" />

</LinearLayout>

charge_expandable_fragment_child_item.xml

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="80dp"
    android:background="@drawable/selector_expandable_child_item"
    android:gravity="center_vertical"
    android:minHeight="80dp"
    android:orientation="horizontal" >

    <TextView
        android:id="@+id/child_textview"
        style="@style/WhiteLargeNormalStyle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp"
        android:layout_weight="1"
        android:gravity="left|center_vertical"
        android:text="子元素" />

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="5dp"
        android:src="@drawable/arrow_right" />

</LinearLayout>

selector_expandable_child_item.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/child_item2" android:state_activated="true"/>
    <item android:drawable="@drawable/child_item1"/>

</selector>

代码部分：

		final private ExpandableListView.OnChildClickListener mOnClickListener = new ExpandableListView.OnChildClickListener() {

			@Override
			public boolean onChildClick(ExpandableListView parent, View v,
					int groupPosition, int childPosition, long id) {
				// 设置选中背景
				setItemChecked(groupPosition, childPosition);
				// TODO 执行选中后的操作
				return true;
			}
		};

		private void setItemChecked(int groupPosition, int childPosition) {
			if (mListView == null) {
				return;
			}

			this.mGroupPosition = groupPosition;
			this.mChildPosition = childPosition;

			int numberOfGroupThatIsOpened = 0;
			for (int i = 0; i < groupPosition; i++) {
				if (mListView.isGroupExpanded(i)) {
					numberOfGroupThatIsOpened += mAdapter.getChildrenCount(i);
				}
			}
			int position = numberOfGroupThatIsOpened + groupPosition
					+ childPosition + 1;
			System.out.println("groupPosition=" + groupPosition
					+ ", childPosition=" + childPosition + ", position="
					+ position + ", isItemChecked="
					+ mListView.isItemChecked(position));
			if (!mListView.isItemChecked(position)) {
				mListView.setItemChecked(position, true);
			}
		}

			@Override
			public View getGroupView(int groupPosition, boolean isExpanded,
					View convertView, ViewGroup parent) {
				if (convertView == null) {
					convertView = mInflater.inflate(
							R.layout.charge_expandable_fragment_group_item,
							null);
				}
				ImageView indicator = (ImageView) convertView
						.findViewById(R.id.group_indicator);
				if (isExpanded) {
					// 设置展开后的group标头图片
					indicator
							.setImageResource(R.drawable.expander_arrow_expand);
					// 在折叠后再次展开，之前的选中会消失，此处需要设置一次
					if (groupPosition == mGroupPosition) {
						setItemChecked(mGroupPosition, mChildPosition);
					}
				} else {
					// 折叠后的group标头图片
					indicator
							.setImageResource(R.drawable.expander_arrow_collapse);
				}
				TextView text = (TextView) convertView
						.findViewById(R.id.group_textview);
				text.setText(groups[groupPosition]);
				return convertView;
			}