com.parse
Class FindCallback
Object
com.parse.FindCallback
public abstract class FindCallback
- extends Object
A FindCallback is used to run code after a ParseQuery
is used to
fetch a list of ParseObject
s in a background thread.
The easiest way to use a FindCallback 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 all objects of class
"MyClass"
. It calls a different function depending on whether
the fetch succeeded or not.
ParseQuery query = new ParseQuery("MyClass");
query.findInBackground(new FindCallback() {
public void done(List<ParseObject> objects, ParseException e) {
if (e == null) {
objectsWereRetrievedSuccessfully(objects);
} else {
objectRetrievalFailed();
}
}
});
Methods inherited from class Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
FindCallback
public FindCallback()
done
public abstract void done(List<ParseObject> objects,
ParseException e)
- Override this function with the code you want to run after the fetch is
complete.
- Parameters:
objects
- The objects that were retrieved, or null if it did not succeed.e
- The exception raised by the save, or null if it succeeded.