SharedPreferences are sometimes deleted

Question

My app uses SharedPreferences (with the help of a PreferenceActivity) to store all settings. But sometimes all settings are deleted and all values are set back to default. M

Answer 1

SharedPreferences usually work great and as you mentioned without any problem on smartphones. It should also work on tablets. However it would be best to use sqlite or backing your shared prefs on a server for each users id data loss is a problem.