Package com.parse

Interface GetCallback<T extends ParseObject>

public interface GetCallback<T extends ParseObject>

A GetCallback is used to run code after a ParseQuery is used to fetch a ParseObject 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 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 object of class "MyClass" and id myId. It calls a different function depending on whether the fetch succeeded or not.

 ParseQuery<ParseObject> query = ParseQuery.getQuery("MyClass");
 query.getInBackground(myId, new GetCallback<ParseObject>() {
   public void done(ParseObject object, ParseException e) {
     if (e == null) {
       objectWasRetrievedSuccessfully(object);
     } else {
       objectRetrievalFailed();
     }
   }
 });
 

Method Summary

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

Method Detail

done

void done(T object,
          ParseException 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 fetch, or null if it succeeded.