Android 如何发送语音消息？

http://docs.easemob.com/im/200androidclientintegration/50singlechat#发送语音消息 这里有文档，您看一下 
发送语音消息
//filePath为语音文件路径，length为录音时间(秒)
EMMessage message = EMMessage.createVoiceSendMessage(filePath, length, toChatUsername);
//如果是群聊，设置chattype，默认是单聊
if (chatType == CHATTYPE_GROUP)
    message.setChatType(ChatType.GroupChat);
EMClient.getInstance().chatManager().sendMessage(message);