Now a user can choose what to see on the map. Maybe only bike pumps or everything. To do that I created a new class ListPreferenceMultiSelect extends ListPreference which is more or less taken from DroidWeb tutorial. The source ListPreferenceMultiSelect.java was improved a little bit: The constructor checks if entries are not empty before creating indices. For the second a new method was added: prepareValueToStore, the opposite one of parseStoredValue. Here is my ListPreferenceMultiSelect.java and in the version 0.2.6. This version was published on the Market and committed to the repository.