TagViews doesn't display any tags

[sgrumo]

Hi guys, I'm trying to add Tag on a TagView. I know how to do that, I have a particular problem : I'm trying to add Tags dynamically to a TagView but when I do that it doesn't display any tags. I'm debugging and print some Logs in order to know if inside the TagView there are any tags. I know for sure there are, so the problem isn't the Tags themself, I think there is a problem with XML. I've another TagView and with them I've noticed that if I add a backgroud to a TagView ( in order to get a line to the bottom of the View ) the widget doesn't display any Tags.

So the problem is : what's the problem with my XML?

`

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textStyle="bold"
            android:text="Interessi:"
            android:textSize="18sp"
            android:paddingRight="7dp"
            android:id="@+id/textView4" />
            <com.cunoraz.tagview.TagView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/modify_interests"
               />
    </LinearLayout>

`