EventWorkerResult.java

//WARNING: this code is no longer valid as of WorkManager-alpha-10, please
//refer to this post for more details: https://medium.com/p/8e49c463cbf7

//finally, we get the status from the WorkManager by id since we still have
//a reference, otherwise we could do it by tag, and create an observer which
//checks whether the Worker has succeeded (i.e. returned Worker.Result.SUCCESS)
WorkManager.getInstance()
  .getStatusById(getEventJson.getId())
  .observe(MainActivity.this, workStatus -> {
    if (workStatus != null && workStatus.getState().equals(State.SUCCEEDED)) {
      //if we have success, we trigger post-work tasks
      onWorkCompleted();
    }
  });