Question

I want to set new style for expandable list view in my Android app. I am creating a group_indicator.xml file in drawable folder, where I am writing the code:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_empty="true" android:drawable="@drawable/arrowright1">
    <item android:state_expanded="true" android:drawable="@drawable/arrowdown1">
    <item android:drawable="@drawable/arrowright1">
</item></item></item></selector>

Then I am using this XML file in my ExpandableList view in the main file:

<ExpandableListView
        android:id="@+id/android:list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:groupIndicator="@drawable/group_indicator"
        android:layout_weight="1" >
    </ExpandableListView>

Now I want to set some more styles for my expandable list, I want to change the appearance of the parent and the child nodes.

Is there any other way to do that?
I heard of some style.xml file in res->values folder, but I don’t know exactly how to implement it.
Please Guide.

Answer 1

You need to use implement custom ExpandableListAdapter

Override the following methods:

getChildView to override child view and inflate your own custom view.
getGroupView to override group header view and inflate your own custom view.