Android: Content Provider

http://developer.android.com/guide/topics/providers/content-providers.html
http://developer.android.com/reference/android/content/ContentProvider.html
http://developer.android.com/reference/android/content/ContentResolver.html
http://developer.android.com/reference/android/content/ContentValues.html
http://www.android1.net/Topic.aspx?BoardID=11&TopicID=305

Content provider has following APIs:

query()
insert()
update()
delete()
getType()

Application should use a ContentResolver interface to get data, get calling getContentResolver(). To use the APIs, you need to provide an URI to identify the data set.

Following is the flow of adding a phonebook entry to SIM:

1. EditContactActivity::doSaveSIMAction()
call ContentResolver.insert

2. IccProivder::insert()
implement the corresponding action of URI

3. IccPhoneBookInterfaceManager::updateAdnRecordsInEfBySearch()
Further call AdnReocrdCache, AdnRecordLoader,