UML class diagram for Android compound view

Recently, I had to create a compound control in an Android app. I was able to do it with help of this tutorial, this tutorial and Android API guide. This is to post a UML class diagram as an additional illustration.

Here's what my compound view looks like. It consists of an EditText, a SeekBar, a pair of buttons for incrementing and decrementing. All controls are tied to a single integer value.