You can also custom your XML code by using Selector. Here is an example code.
Create a selector. In file selector.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:color="@android:color/transparent" />
<item android:color="@color/gray" />
</selector>
In your view
android:textColorHint="@drawable/selector"