com.avos.avoscloud

Class FindCallback<T extends AVObject>

java.lang.Object

com.avos.avoscloud.AVCallback<List<T>>

com.avos.avoscloud.FindCallback<T>

Direct Known Subclasses:

InboxStatusFindCallback

public abstract class FindCallback<T extends AVObject>
extends AVCallback<List<T>>

A FindCallback is used to run code after a AVQuery is used to fetch a list of AVObjects in a background thread.

The easiest way to use a FindCallback is through an anonymous inner class. Override the done function to specify what the callback should do after the fetch is complete. The done function will be run in the UI thread, while the fetch happens in a background thread. This ensures that the UI does not freeze while the fetch happens.

For example, this sample code fetches all objects of class "MyClass". It calls a different function depending on whether the fetch succeeded or not.

AVQuery query = AVQuery.getQuery("MyClass"); query.findInBackground(new FindCallback() { public void done(List objects, AVException e) { if (e == null) { objectsWereRetrievedSuccessfully(objects); } else { objectRetrievalFailed(); } } });

Constructor Summary

Constructors

Constructor and Description
FindCallback()

Method Summary

Modifier and Type	Method and Description
abstract void	done(List<T> parseObjects, AVException parseException) Override this function with the code you want to run after the fetch is complete.
protected void	internalDone0(List<T> returnValue, AVException e)

Methods inherited from class com.avos.avoscloud.AVCallback

internalDone, internalDone, mustRunOnUIThread

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FindCallback

public FindCallback()

Method Detail

done

public abstract void done(List<T> parseObjects,
                          AVException parseException)

Override this function with the code you want to run after the fetch is complete.

Parameters:

parseObjects - The objects matching the query, or null if it failed.

parseException - The exception raised by the find, or null if it succeeded.

internalDone0

protected final void internalDone0(List<T> returnValue,
                                   AVException e)

Specified by:

internalDone0 in class AVCallback<List<T extends AVObject>>