library/src/main/java/com/liulishuo/filedownloader/FileDownloader.java
public int replaceListener(int id, FileDownloadListener listener) {
        final BaseDownloadTask.IRunningTask task = FileDownloadList.getImpl().get(id);
        if (task == null) {
            return 0;
        }

        task.getOrigin().setListener(listener);
        return task.getOrigin().getId();
    }
public int replaceListener(int id, FileDownloadListener listener) {
        final BaseDownloadTask.IRunningTask task = FileDownloadList.getImpl().get(id);
        if (task == null) {
            return 0;
        }

        task.getOrigin().setListener(listener);
        return task.getOrigin().getId();
    }
public int replaceListener ( int id , FileDownloadListener listener ) { final BaseDownloadTask . IRunningTask task = FileDownloadList . getImpl ( ) . get ( id ) ; if ( task == null ) { return 0 ; } task . getOrigin ( ) . setListener ( listener ) ; return task . getOrigin ( ) . getId ( ) ; }
Find the running task by {@code id}, and replace its listener width the new one
{@code listener}.

@return The target task's DownloadId, if not exist target task, and replace failed, will be 0
@see #replaceListener(String, FileDownloadListener)
@see #replaceListener(String, String, FileDownloadListener)
Find the running task by { @code id } and replace its listener width the new one { @code listener } .