CursorLoader is a specialized subclass of
AsyncTaskLoader that uses its lifecycle methods to correctly manage the resources associated with a database
Cursor is a little like an
Iterator, in that it allows you to scroll through a dataset without having to worry where exactly the dataset is coming from or what data structure it is a part of.
We're going to use
CursorLoader to query the MediaStore for a list of all images on the device. Because
CursorLoader is already implemented to correctly handle all of the details of working with a
Cursor, we don't need to subclass it. We can simply instantiate it, passing in the information it needs in order to open the
Cursor it should manage for ...