com.parse
Class GetCallback
Object
com.parse.GetCallback
public abstract class GetCallback
- 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 query = new ParseQuery("MyClass");
query.getInBackground(myId, new GetCallback() {
public void done(ParseObject object, ParseException e) {
if (e == null) {
objectWasRetrievedSuccessfully(object);
} else {
objectRetrievalFailed();
}
}
});
Method Summary |
abstract void |
done(ParseObject 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(ParseObject 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.