Android: String set preference is not persistent

Question

I have a problem with storing string set preference. I have these utility methods for storing:

public static void putStringSet(SharedPreferences pref, Editor         


        

Answer 1

My condition is very similar to yours, the only difference is when restart the app, preference contains A, B, C, but when reinstall it or reboot the phone, B&C are gone.

I also tried replace commit() with apply(), as this post adviced SharedPreferences not persistent , but still not to work.

I solved this problem by remove & commit the preference before replacing it:

editor.remove("StringSetKey");
editor.commit();

editor.putStringSet("StringSetKey", newSet);
editor.commit();

Ps: you can type adb pull /data/data//shared_prefs/xxxx.xml in cmd line to see if the commit() really works

Pps: I think this is a bug with putStringSet....

hope this will help you ;)