Android: How to get callback from content provider when data changes?

Question

Let's say I have 3 active actions that can display and add data to ContentProvider. What is the best way to synchronize state between actions? For example, if ActivityA adds a new entry to ContentProvider, I would like ActivityB and ActivityC to be notified so that they can update their view.

Answer 1

Use a method ContentResolver.registerContentObserver()for each action and set the appropriate URIs.

You can pass the base content URI for the provider and pass truefor the parameter notifyForDescendents, and your callback will be hit every time it changes.

, , ( ). , ContentResolver.notifyChange() URI .