MqttAndroidClient.connect() ， Neither the successful nor the failed callbacks were executed

[Terry999555]

mqttAndroidClient?.connect(mqttConnectOptions, null, object : IMqttActionListener {
override fun onSuccess(asyncActionToken: IMqttToken?) {

                }

                override fun onFailure(asyncActionToken: IMqttToken?, exception: Throwable?) {
                    
                }
            })

Usage scenario: 

1: Connect to a new mqtt connection and disconnect when not needed.
2: a new connection is generated in a few seconds.
causes success and failure callbacks not to be executed during connection.

[Terry999555]

It was later found：
the value receiverRegistered in the MqttAndroidClient class was true

which led to the registerReceiver() method not being used when reconnecting, resulting in neither the successful nor the failed connection methods being executed.

You can set it up by unregisterResources() before each connection.