Android Question Set focus at the end of text of editText view

Hello,
I'm getting mad with a silly issue.
I spent 1/2 hour looking on the forum, becasue I think it is something asked in past, but i cannot find anything.

Here the point
When I click on a edit field, I want to set the focus on it (easy) and set the pointer at the end of the test.

I cannot find a method like etf.setfocus
to use wit something like
setfocus (len(etf.text))

I'm pretty sure this could be feasible but no idea what to look for.

thanks
dex