| 接口 | 说明 | 
|---|---|
| ProgressListener | 
 Listener interface for transfer progress events. 
 | 
| ProgressListenerChain.ProgressEventFilter | 
 An interface that filters the incoming events before passing
 them into the registered listeners. 
 | 
| 类 | 说明 | 
|---|---|
| ProgressEvent | 
 Notification of a progress change on a transfer. 
 | 
| ProgressListenerCallbackExecutor | 
 This class wraps a ProgressListener object, and manages all its callback
 execution. 
 | 
| ProgressListenerChain | 
 An implementation of ProgressListener interface that delegates
 progressChanged callback to multiple listeners. 
 | 
| ProgressReportingInputStream | 
 Simple InputStream wrapper that occasionally notifies a progress listener
 about the number of bytes transferred. 
 | 
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