<android.support.design.widget.FloatingActionButton
            android:id="@+id/fab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:elevation="6dp"
            app:elevation="6dp"
            app:borderWidth="0dp"
            app:backgroundTint="@color/blue"
            android:layout_gravity="bottom|right"
            android:layout_margin="16dp"
            android:src="@drawable/ic_mode_edit_black_24dp"
            app:layout_anchorGravity="bottom|right|end" />