ProgressListener (Box Java SDK)

```
public interface ProgressListener
```
The listener interface for monitoring the progress of a long-running API call.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`onProgressChanged(long numBytes, long totalBytes)` Invoked when the progress of the API call changes.

- Method Detail
  - onProgressChanged
```
void onProgressChanged(long numBytes,
                       long totalBytes)
```
    Invoked when the progress of the API call changes. In case of file uploads which are coming from a dynamic stream the file size cannot be determined and total bytes will be reported as -1.
    
    Parameters:
    
    numBytes - the number of bytes completed.
    
    totalBytes - the total number of bytes.