android - Checking for getActivity() == null on user action -

whenever of our fragments asynchronous response network request, check whether getactivity() == null if have touch activity or use context.

so our code flow looks this:

protected void onnetworkresponse(string response) {    if (getactivity() == null)          return;    getactivity().setprogressbarvisibility(false);     // rest of processing here  } 

this makes sense (please comment if we're doing wrong! :) ). however, check getactivity() == null on user feedback, in onclicklistener, if we're going reference activity. me seems we're being overly cautious, because definition if button on fragment clicked, had attached activity. being overly cautious?