While making a selector
, always keep the default state at the end, otherwise only default state would be used. You need to reorder the items in your selector as:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_checked="true" android:color="@android:color/holo_blue_dark" />
<item android:color="@android:color/darker_gray" />
</selector>
And the state to be used with BottomNavigationBar
is state_checked
not state_selected
.