Really, this app is not designed to be used for serious development. Rather, it is a fan project for Qt lovers like myself. I often found the need, in the absence of a desktop computer, to show QML's advantages to programers who haven't yet had a chance to appreciate declarative programming. Or, alternatively, if you want to develop QML components and just don't have a desktop around, now you can do it anywhere you like on your mobile device.
The first release includes 5 examples and all the functionality of Qt Quick 2.1. In the near future, I'm going to finish the code highlighting (it's not really working right now, sorry) and also build in some editor skins. Naturally, I'll give you some more examples. And upgrade to 5.2:)
https://play.google.com/store/apps/details?id=com.wearyinside.qmlcreator