subscribe

Hi Scenario: first time app runs, user choose (checkbox) one or more topics from preference activity. when pref activity closes, app should subscribe/unsubscribe from topic(s) and receive only he choosed. now code to subscribe to all topics is from Erel's example. i tried with diff code in...

Hi guys, I have a published app on the google market which sometimes logs a java.lang.NullPointerException on subscribe. this is what I get in the Android vitals java.lang.NullPointerException: at anywheresoftware.b4j.objects.MqttAsyncClientWrapper.Subscribe (MqttAsyncClientWrapper.java:116)...