selector
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_pressed="true"
android:drawable="@drawable/btn_grey_shape" />
<item android:state_enabled="false"
android:drawable="@drawable/btn_grey_shape" />
<item android:drawable="@drawable/btn_pink_shape"></item>
</selector>
shape
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<corners android:radius="@dimen/radius"/>
<solid android:color="@color/pink"/>
</shape>