In android not require to take extra resource to like image to make text view text have shadow effect. to make native effect to TextView follow this few lines of code
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:shadowColor="#000000"
android:shadowDx="2"
android:shadowDy="2"
android:shadowRadius="2"
android:text="Your Text With Shadow"
android:textColor="#FF0000"
android:textSize="20sp" />
View Display like
Above highlighted line that is to make simple shadow effect to TextView. and make your application light weight and increase your performance