btnstartcolor.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true" android:state_pressed="true"
        android:drawable="@android:color/holo_green_light" />
    <item android:state_focused="false" android:state_pressed="true"
        android:drawable="@android:color/holo_green_light" />
    <item android:drawable="@android:color/holo_green_dark" />
</selector>