com.avos.avoscloud

Class CountCallback

java.lang.Object

com.avos.avoscloud.AVCallback<Integer>

com.avos.avoscloud.CountCallback

public abstract class CountCallback
extends AVCallback<Integer>

A CountCallback is used to run code after a AVQuery is used to count objects matching a query in a background thread.

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

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

 AVQuery<AVObject> query = AVQuery.getQuery("MyClass");
 query.countInBackground(new CountCallback() {
   public void done(int count, AVException e) {
     if (e == null) {
       objectsWereCountedSuccessfully(count);
     } else {
       objectCountingFailed();
     }
   }
 });
 

Constructor Summary

Constructors

Constructor and Description
CountCallback()

Method Summary

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

CountCallback

public CountCallback()

Method Detail

done

public abstract void done(int count,
                          AVException e)

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

Parameters:

count - The number of objects matching the query, or -1 if it failed.

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

internalDone0

protected final void internalDone0(Integer returnValue,
                                   AVException e)

Specified by:

internalDone0 in class AVCallback<Integer>