app/src/main/res/drawable/button_light_green.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Button colors for pressing -->
<item android:state_pressed="true">
<shape android:shape="rectangle">
<corners android:radius="10dp" />
<solid android:color="@color/DarkGreen"/>
</shape>
</item>
<!-- Button color standard -->
<item >
<shape android:shape="rectangle">
<corners android:radius="10dp" />
<solid android:color="@color/LightGreen"/>
</shape>
</item>
</selector>