// Cancel file transfer while it is in progress. public boolean cancelFile(String channelName, String exchangeId) { Log.d(TAG, TAGClass + "cancelFile()"); // Request the channel interface for the specific channel name. IChordChannel channel = mChord.getJoinedChannel(channelName); if (null == channel) { Log.e(TAG, TAGClass + "cancelFile() : invalid channel instance"); return false; } // @param exchangeId Exchanged ID return channel.cancelFile(exchangeId); }