This is also a nice approach. For one, the new CursorLoader class requiresContentProviders, so if you want an Activity or Fragment to implementLoaderManager.LoaderCallbacks<Cursor> with a CursorLoader (as discussed inthis post), you’ll need to implement a ContentProvider for your application. Further, you don’t need to worry about making a singleton database helper withContentProviders. Simply call getContentResolver() from the Activity and the system will take care of everything for you (in other words, there is no need for designing a Singleton pattern to prevent multiple instances from being created).
，今天不想走，明天就要跑了。
