Android switch between Login and MainActivity -

i have 2 activities. mainactivity

public class mainactivity extends sherlockfragmentactivity{      private sharedpreferences settings;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         settings = getpreferences(0);          if (settings.getboolean("firststart", true)) {             intent = new intent(getapplicationcontext(), loginactivity.class);             startactivity(i);             finish();         }         } } 

loginactivity called @ first time app starting. calls saveclass() method:

private void saveclass() {         sharedpreferences preferences = getpreferences(0);         sharedpreferences.editor editor = preferences.edit();          editor.putboolean("firststart", false);          editor.commit();          toast.maketext(loginactivity.this, r.string.toast_login_success, toast.length_short).show();          intent = new intent(getapplicationcontext(), mainactivity.class);         startactivity(i);         finish();     } 

and problem:

the loginactivity started. guess preferences not working fine. did make wrong or have code works?

instead of using getpreferences try using

preferencemanager.getdefaultsharedpreferences(context);