How to create a Thread-safe ContentProvider?

Android documentation says

ContentProvider methods can be called from various ContentResolver objects in different processes and threads, they must be implemented in a thread-safe manner

And I found this post on Stackoverflow A开发者_如何学Cndroid - sqlite content providers and multithreading which says it's thread safe already ??

So, Just wondering how to create a thread-safe ContentProvider ? Is it enough if I make the insert/update/delete methods syncronized

public synchronized Uri insert (Uri uri, ContentValues values) {

}

You could make every method synchronized, but make sure it is absolutely necessary before you do. In cases where the underlying data source is already thread-safe making the methods synchronized could be costly. See my blog post on this topic for more information.