I am unable to find how to achieve stroke on textview from XML , not by canvas.
You can imitate a stroke with a text shadow:
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FFFFFF"
android:shadowColor="#000000"
android:shadowDx="0.0"
android:shadowDy="0.0"
android:shadowRadius="2.0" />