Android EditText - Focus on it and select all text programmatically

Question

I am new to Android and I am trying to figure out how do I focus on EditText and select all text in it.

Here is the scenario:

1. User enters user name in E

Answer 1

I figured it out. Here is what I did.

I have a button user clicks when he enters user name (the positive button on DialogFragment). On button click event, I do this:

editUserName.setSelectAllOnFocus(true);
editUserName.selectAll();

This will focus and select all text in the EditText.