title: Is java.util.Observable in Android thread-safe?
body: <p>Is java.util.Observable in Android thread-safe? The <a href="http://developer.android.com/reference/java/util/Observable.html" rel="nofollow">documentation</a> says that only deleteObserver() and deleteObservers() are synchronized methods. What about addObserver(), set/clear/hasChanged()? Can I safely call addObserver() from different threads without locking around the Observable object?</p>