CountCallback

```
public interface CountCallback
```
A CountCallback is used to run code after a ParseQuery is used to count objects matching a query in a background thread.
The easiest way to use a CountCallback 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.
```
 ParseQuery<ParseObject> query = ParseQuery.getQuery("MyClass");
 query.countInBackground(new CountCallback() {
   public void done(int count, ParseException e) {
     if (e == null) {
       objectsWereCountedSuccessfully(count);
     } else {
       objectCountingFailed();
     }
   }
 });
 
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`done(int count, ParseException e)`	Override this function with the code you want to run after the count is complete.

- Method Detail
  - done
```
void done(int count,
          ParseException 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.