Installing BlackBerry PlayBook simulator on Ubuntu

You may heard of the extended Free PlayBook offer from BlackBerry. If not, basically if you upload an app, no matter in which language you write or have written your app, they will offer you a free PlayBook when your app gets approved. So I wanted to take the chance…

Excluding URLs from the security-constraint in App Engine

I was playing and searching around for how to exclude a URL from the security constraint in the web.xml file in App Engine. For my application everyone has to be authenticated to access anything in the application and I don't want to add every URL to the pattern. So…

Organization tips for Android projects

If you develop apps for Android you may have noticed, that you quickly lose the overview of your layouts, ids, drawables, packages, etc. I want to share my experience with you and suggest a few tips, how to organize your projects. I consider myself to these rules, because they help…

ListView with Sections/Separators

If you've ever used ListView, and i bet you had, then you will have noticed that it is not very handy if you want to display a huge amount of data. I found a few solutions, how to categorize list items like in your phones preferences. This post won't be…