ExpandableListView替换图标

ExpandableListView的图标有两种状态，分别是合拢状态，和点击展开状态。

一、在res/drawable/下新建group_icon_selector.xml 内容如下：

<?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:state_expanded="true" android:drawable="@drawable/narrow_select" />

<item android:drawable="@drawable/narrow" />

</selector>

二、Java代码：

listView = (ExpandableListView)this.findViewById(R.id.ex);

listView.setGroupIndicator(this.getResources().getDrawable(R.drawable.group_icon_selector));

// listView.setScrollingCacheEnabled(false);

// listView.setCacheColorHint(0);