/**
 * 发送媒体消息（先上传媒体，再发送消息）
 * @param content 媒体消息实体
 * @param conversation 会话
 * @param callback 发送回调
 * @return 消息对象
 */
Message sendMediaMessage(MediaMessageContent content,
                          Conversation conversation,
                          ISendMediaMessageCallback callback);

VideoMessage video = new VideoMessage();
video.setLocalPath("xxxxxxxxxx");
video.setSnapshotLocalPath("xxxxxxxxx");
video.setHeight(400);
video.setWidth(600);
video.setSize(1024);
video.setDuration(10);
Conversation conversation = new Conversation(Conversation.ConversationType.PRIVATE, "userid1");
IMessageManager.ISendMediaMessageCallback callback = new IMessageManager.ISendMediaMessageCallback() {
    @Override
    public void onProgress(int progress, Message message) {
        Log.i("TAG", "onProgress");
    }

    @Override
    public void onSuccess(Message message) {
        Log.i("TAG", "send message success");
    }

    @Override
    public void onError(Message message, int errorCode) {
        Log.i("TAG", "send message error");
    }

    @Override
    public void onCancel(Message message) {
        Log.i("TAG", "onCancel");
    }
};
Message message = JIM.getInstance().getMessageManager().sendMediaMessage(video, conversation, callback);
Log.i("TAG", "after send, clientMsgNo is " + message.getClientMsgNo());