com.avos.avoscloud

类 FindCallback<T extends AVObject>

java.lang.Object

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

com.avos.avoscloud.FindCallback<T>

直接已知子类:

InboxStatusFindCallback

public abstract class FindCallback<T extends AVObject>
extends AVCallback<java.util.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(); } } });

构造器概要

构造器

构造器和说明
FindCallback()

方法概要

限定符和类型	方法和说明
abstract void	done(java.util.List<T> avObjects, AVException avException) Override this function with the code you want to run after the fetch is complete.

从类继承的方法 com.avos.avoscloud.AVCallback

internalDone, internalDone

从类继承的方法 java.lang.Object

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

构造器详细资料

FindCallback

public FindCallback()

方法详细资料

done

public abstract void done(java.util.List<T> avObjects,
                          AVException avException)

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

参数:

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

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