When finish Activity in BehaviorSubject's subscribe, The application is crashed

Question

In 'subcribe' of 'BehaviorSubject', receive 'ArrayList' as a parameter to process data. If you try to pass the accepted data into the Intent and finish it, the app is stopped. What's the problem?

subject(requestData)
   .map(r->arrayList = r.getArrayList())
   .observeOn(Android.Schedulers.mainThread())
   .subscribe(r->{ finishWithData(r)});

private void finishWithData(r) {
   Intent intent = new Intent();
   intent.putExtra("array", r);
   setResult(Activity.RESULT_OK, intent);
   finish() // Here is Crash Point.
}

Answer 1

I would suggest getting Disposable from BehaviorSubject and dispose it in onDestroy of Activity.

Disposable disposable;


disposable = subject(requestData)
              .map(r->arrayList = r.getArrayList())
              .observeOn(Android.Schedulers.mainThread())
              .subscribe(r->{ finishWithData(r)});

@Override
protected void onDestroy() {
    disposable.dispose();
    super.onDestroy();
}