[Nexus 4] Setting focus and showing soft keyboard

Within my app I have code like this:

// in Item class constructor
inputText.needsSoftKeyboard = true;
// in ItemContainer class
var item:Item = new Item();
addChild(item);
stage.focus = item.inputText;
requestSoftKeyboard();

However, when I test on my Nexus 4 I find that while the textfield appears to receive focus (there's a blinking text cursor in it) the soft keyboard does not show up. If I manually tap the textfield then the soft keyboard appears.

So, how do I get the soft keyboard to show up when I create the item?

-Aaron