code: int cancel(int downloadId) {
  		synchronized (mCurrentRequests) {
  			for (DownloadRequest request : mCurrentRequests) {
  				if (request.getDownloadId() == downloadId) {
  					request.cancel();
  					return 1;
  				}
  			}
  		}
  
  		return 0;
  	}
docs: Cancel a particular download in progress. Returns 1 if the download Id is found else returns 0.
  
  @param downloadId
  @return int