public
static
interface
LoaderManager.LoaderCallbacks
| android.support.v4.app.LoaderManager.LoaderCallbacks<D> |
Callback interface for a client to interact with the manager.
Public methods | |
|---|---|
abstract
Loader<D>
|
onCreateLoader(int id, Bundle args)
Instantiate and return a new Loader for the given ID. |
abstract
void
|
onLoadFinished(Loader<D> loader, D data)
Called when a previously created loader has finished its load. |
abstract
void
|
onLoaderReset(Loader<D> loader)
Called when a previously created loader is being reset, and thus making its data unavailable. |
Loader<D> onCreateLoader (int id, Bundle args)
Instantiate and return a new Loader for the given ID.
| Parameters | |
|---|---|
id |
int:
The ID whose loader is to be created. |
args |
Bundle:
Any arguments supplied by the caller. |
| Returns | |
|---|---|
Loader<D> |
Return a new Loader instance that is ready to start loading. |
void onLoadFinished (Loader<D> loader, D data)
Called when a previously created loader has finished its load. Note
that normally an application is not allowed to commit fragment
transactions while in this call, since it can happen after an
activity's state is saved. See FragmentManager.openTransaction() for further discussion on this.
This function is guaranteed to be called prior to the release of the last data that was supplied for this Loader. At this point you should remove all use of the old data (since it will be released soon), but should not do your own release of the data since its Loader owns it and will take care of that. The Loader will take care of management of its data so you don't have to. In particular:
The Loader will monitor for changes to the data, and report
them to you through new calls here. You should not monitor the
data yourself. For example, if the data is a Cursor
and you place it in a CursorAdapter, use
the CursorAdapter(android.content.Context, android.database.Cursor, int) constructor without passing
in either FLAG_AUTO_REQUERY
or FLAG_REGISTER_CONTENT_OBSERVER
(that is, use 0 for the flags argument). This prevents the CursorAdapter
from doing its own observing of the Cursor, which is not needed since
when a change happens you will get a new Cursor throw another call
here.
Developers
Cursor from a CursorLoader,
you should not call close() on it yourself. If the Cursor is being placed in a
CursorAdapter, you should use the
swapCursor(android.database.Cursor)
method so that the old Cursor is not closed.
| Parameters | |
|---|---|
loader |
Loader:
The Loader that has finished. |
data |
D:
The data generated by the Loader.
|
void onLoaderReset (Loader<D> loader)
Called when a previously created loader is being reset, and thus making its data unavailable. The application should at this point remove any references it has to the Loader's data.
| Parameters | |
|---|---|
loader |
Loader:
The Loader that is being reset.
|