You don't check if the WeakReference is still alive. I think you should also check if the reference is not yet enqueued.

[businessvivek3600]

          You don't check if the `WeakReference` is still alive. I think you should also check if the reference is not yet enqueued.

protected String getPreferencesBaseKey() {
    if (contextReference.isEnqueued() || contextReference.get() == null)
        retrun null;
    return contextReference.get().getPackageName() + "_preferences";
}

Originally posted by @heinrichreimer in #166 (comment)