在Android Oreo及更高版本上运行我的应用程序时，出现MQTT Connection错误。
我已经实现了这个有关HiveMQ的MQTT。这是它的链接- https://www.hivemq.com/blog/mqtt-client-library-enyclopedia-paho-android-service/
错误-
E/AndroidRuntime: FATAL EXCEPTION: MQTT Con:
Process: PID: 7190
java.lang.NullPointerException: cancel() called with a null PendingIntent
at android.app.AlarmManager.cancel(AlarmManager.java:901)
at org.eclipse.paho.android.service.AlarmPingSender.stop(AlarmPingSender.java:86)
at org.eclipse.paho.client.mqttv3.internal.ClientComms.shutdownConnection(ClientComms.java:327)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:608)
at java.lang.Thread.run(Thread.java:764)