To ExpandableListView When there is an arrow icon, the system comes with a custom layout that you can't remove. Just set a property , as follows ：

settingLists.setGroupIndicator(null);  ~~~~~~~~~~~~~~~~~ Here is how to set up a custom arrow icon . If it's empty, it's gone .

You can also customize it （ But the location is still in that place, not recommended ） as follows ：

First , Customize a expandablelistviewselector.xml file , The details are as follows ：
Java Code

<?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/expandablelistviewindicatordown" />

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

</selector>

Add a code as follows ：

settingLists.setGroupIndicator(this.getResources().getDrawable(R.layout.expandablelistviewselector));

Be accomplished

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