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RosterListener - > presenceChanged, sometimes doesn't work(smack-legacy-4.1.0-alpha2-SNAPSHOT)

Question asked by Misayanice on Sep 30, 2014

   When I log in using spark a user (a), Next, using a mobile phone to log another user (b) This time, RosterListener -.> PresenceChanged, not detected (a) is available;please help me..

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