Android: Login and Logout in all the activities -

am beginner android, have 1 clarification in login & logout... username , password through json....so no problem that....

now, there 3 activities in app.. activities has "login " function, if login in of 3 activities, should logged in activities.

and same way , if logout in of 3 activities, should logged out activities.

thanks.

you can use shared preference this. store boolean value islogin true if login , make false when logout according display string

some sample code if not know preference

public string getstringpreference(string key) {             return settings.getstring(key,  null);      }      public void setstringpreference(string key, string value) {          settings.edit().putstring(key, value).commit();      } 

in activity's or application's oncreate, call this:

settings = getapplicationcontext().getsharedpreferences(prefs_file, context.mode_private);