When connection is not established for invalid URL and call mStompClient.isConnected() , then crash the APP

[ghost]

When connection is not established for invalid URL and call mStompClient.isConnected() , then crash the APP

java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.Boolean.booleanValue()' on a null object reference at tv.jaja.stomp.StompClient.isConnected(StompClient.java:306)

[queendevelopers]

StompClient will throw null pointer exception when it is not connected. So, check if(mStompClient!=null){ if(mStompClient.isConnected()){ //Do your code here. } }