Connectivity Manager unregisterNetworkCallBack already unregistered

Question

In my android application I am unregistering a networkCallback onPause of an activity. There are times where I can get the error, Caused by

java.lang.IllegalArgumentException
NetworkCallback was already unregistered

Is there a way to check if the network callback already was unregistered or to prevent "double" unregistering? Or registered so we known when to call unregister?

if (mNetworkCallback != null && mConnectivityManager != null) {
           try{
               mConnectivityManager.unregisterNetworkCallback(mNetworkCallback);

           }
           catch (Exception e){
               Log.d(TAG, "unregister failed");
           }
        }

Answer 1

There is no method to check if the network is already unregistered.

1. Try to put your code in:

try{
    //your code
} 
catch (IllegalArgumentException exception){
    //network is already unregistered
}

2. Or simply you can handle it with boolean flag yourself.