com.avos.avoscloud

Class GetFileCallback<T extends AVFile>

java.lang.Object

com.avos.avoscloud.AVCallback<T>

com.avos.avoscloud.GetFileCallback<T>

public abstract class GetFileCallback<T extends AVFile>
extends AVCallback<T>

A GetFileCallback is used to run code after a AVFile.parseFileWithObjectId is used to fetch a AVFile by object id in a background thread.

The easiest way to use a GetFileCallback 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 an AVFile with object id 'myId':

 AVFile.parseFileWithObjectId(myId, new GetFileCallback<AVFile>() {
   public void done(AVFile file, AVException e) {
     if (e == null) {
       fileWasRetrievedSuccessfully(object);
     } else {
       fileRetrievalFailed();
     }
   }
 });
 

Constructor Summary

Constructors

Constructor and Description
GetFileCallback()

Method Summary

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

GetFileCallback

public GetFileCallback()

Method Detail

done

public abstract void done(T object,
                          AVException e)

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

Parameters:

object - The object that was retrieved, or null if it did not succeed.

e - The exception raised by the save, or null if it succeeded.

internalDone0

protected final void internalDone0(T returnValue,
                                   AVException e)

Specified by:

internalDone0 in class AVCallback<T extends AVFile>