CursorLoader

CursorLoader

CursorLoader (Context context)

Creates an empty unspecified CursorLoader. You must follow this with calls to setUri(Uri), setSelection(String), etc to specify the query to perform.

CursorLoader

CursorLoader (Context context, 
                Uri uri, 
                String[] projection, 
                String selection, 
                String[] selectionArgs, 
                String sortOrder)

Creates a fully-specified CursorLoader. See ContentResolver.query() for documentation on the meaning of the parameters. These will be passed as-is to that call.

cancelLoadInBackground

void cancelLoadInBackground ()

Called on the main thread to abort a load in progress. Override this method to abort the current invocation of loadInBackground() that is running in the background on a worker thread. This method should do nothing if loadInBackground() has not started running or if it has already finished.

deliverResult

void deliverResult (Cursor cursor)

Sends the result of the load to the registered listener. Should only be called by subclasses. Must be called from the process's main thread.

dump

void dump (String prefix, 
                FileDescriptor fd, 
                PrintWriter writer, 
                String[] args)

Print the Loader's state into the given stream.

getProjection

String[] getProjection ()

getSelection

String getSelection ()

getSelectionArgs

String[] getSelectionArgs ()

getSortOrder

String getSortOrder ()

getUri

Uri getUri ()

loadInBackground

Cursor loadInBackground ()

Called on a worker thread to perform the actual load and to return the result of the load operation. Implementations should not deliver the result directly, but should return them from this method, which will eventually end up calling deliverResult(D) on the UI thread. If implementations need to process the results on the UI thread they may override deliverResult(D) and do so there. To support cancellation, this method should periodically check the value of isLoadInBackgroundCanceled() and terminate when it returns true. Subclasses may also override cancelLoadInBackground() to interrupt the load directly instead of polling isLoadInBackgroundCanceled(). When the load is canceled, this method may either return normally or throw OperationCanceledException. In either case, the Loader will call onCanceled(D) to perform post-cancellation cleanup and to dispose of the result object, if any.

onCanceled

void onCanceled (Cursor cursor)

Called if the task was canceled before it was completed. Gives the class a chance to clean up post-cancellation and to properly dispose of the result.

setProjection

void setProjection (String[] projection)

setSelection

void setSelection (String selection)

setSelectionArgs

void setSelectionArgs (String[] selectionArgs)

setSortOrder

void setSortOrder (String sortOrder)

setUri

void setUri (Uri uri)

onReset

void onReset ()

Subclasses must implement this to take care of resetting their loader, as per reset(). This is not called by clients directly, but as a result of a call to reset(). This will always be called from the process's main thread.

onStartLoading

void onStartLoading ()

Starts an asynchronous load of the contacts list data. When the result is ready the callbacks will be called on the UI thread. If a previous load has been completed and is still valid the result may be passed to the callbacks immediately. Must be called from the UI thread

onStopLoading

void onStopLoading ()

Must be called from the UI thread