I can't run my app because when I add a backgroundTint I get an error upon running my app.
Please someone help, here is my main activity file, where the fab is located.
!https://i.stack.imgur.com/9XVla.jpg
<android.support.design.widget.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:layout_margin="@dimen/fab_margin"
app:fabSize="normal"
app:srcCompat="@android:drawable/ic_input_add"/>