java - Singleton Class : session appears not to be valid sometimes in Android Activity -

java - Singleton Class : session appears not to be valid sometimes in Android Activity -

i have class maincls

public class maincls extends application { public static secsession secsession;

now have created activity set launch mode singletop

my problem secsession appears not valid sometimes

public class myactivity extends actionbaractivity implements connectioncallbacks, onconnectionfailedlistener { @override protected void oncreate(bundle savedinstancestate) { if (!maincls.secsession.issessionvalid()) { }

on oncreate of myactivity, issessionvalid appears not valid. sometime works fines, note login, , every activity have working fine. myactivity doesn't work well, , set singletop

according development guide singletop activity instantiated multiple times. moreover, no "real" singleton. instead should utilize an enum. guess problems related 1 of these or both problems.

java android class singleton