when I use mqtt in android device coolpad 5950 android4.1 appear NullPointerException,what should I do?
java.lang.NullPointerException
at org.fusesource.mqtt.client.CallbackConnection$7.run(CallbackConnection.java:414)
at org.fusesource.hawtdispatch.transport.HeartBeatMonitor$3.run(HeartBeatMonitor.java:83)
at org.fusesource.hawtdispatch.transport.HeartBeatMonitor$1.run(HeartBeatMonitor.java:62)
at org.fusesource.hawtdispatch.internal.SerialDispatchQueue.run(SerialDispatchQueue.java:100)
at org.fusesource.hawtdispatch.internal.pool.SimpleThread.run(SimpleThread.java:77)
when I use mqtt in android device coolpad 5950 android4.1 appear NullPointerException,what should I do? java.lang.NullPointerException at org.fusesource.mqtt.client.CallbackConnection$7.run(CallbackConnection.java:414) at org.fusesource.hawtdispatch.transport.HeartBeatMonitor$3.run(HeartBeatMonitor.java:83) at org.fusesource.hawtdispatch.transport.HeartBeatMonitor$1.run(HeartBeatMonitor.java:62) at org.fusesource.hawtdispatch.internal.SerialDispatchQueue.run(SerialDispatchQueue.java:100) at org.fusesource.hawtdispatch.internal.pool.SimpleThread.run(SimpleThread.java:77)