How to Auto scroll TextView Android Java

I listed how to auto-scroll text containers in C# while ago, and now that I am developing other applications for Android, I needed to do the same for the following:

TextView:
Rx_text is a TextView Container.  and O_Text is a variable of type String


Rx_text.append(O_Text);
Rx_text_scroll_view.scrollTo(0, Rx_text.getBottom());