com.parse
Class GetCallback<T extends ParseObject>
Object
com.parse.GetCallback<T>
public abstract class GetCallback<T extends ParseObject>
- extends Object
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 |
abstract void |
done(T object,
ParseException e)
Override this function with the code you want to run after the fetch is complete. |
Methods inherited from class Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
GetCallback
public GetCallback()
done
public abstract 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 save, or null if it succeeded.