Supporting old versions of Android is getting more and more headache nowadays. Happily, there is a pretty strong community, which continue to contribute various solutions.
In my project, I wanted to use MultiSelectListPreference in order to give a user possibility to select a number of options.
It turned out to be, that Android with SDK less than 11 doesn’t support this class. It means, that all Android devices with OS version less than 4.0 will not have this feature.