# 融雲 集成會話列表加頭佈局

• 這個是在用IMKit的時候會出現的問題，因爲佈局什麼的都是第三方的，那麼怎麼解決呢？要麼改成IMLib，要麼就用混合的。我是用的混合集成的。
• 注意只重寫Adpater並不能實現，ConversationListFragment是可以設置Adapter，但是繼承ConversationListAdapter添加頭會失敗，因爲官方已經封裝好了的，涉及的東西較多，是無法添加成功的。所以不要偷懶，直接重寫佈局要來的更方便一些；

• 原理是自己寫會話列表佈局，那麼需要的東西有哪些呢：

  • 首先我們要拿到會話列表集合
    RongIM.getInstance().getConversationList();

  • 怎麼顯示會話列表內容區域（這個儘量去看源碼吧，不看的話也可以看我寫的代碼）

    RoundedImageView avater = holder.getView(R.id.item_message_system_avatar);
    TextView title = holder.getView(R.id.item_message_system_title);
    TextView detail = holder.getView(R.id.item_message_system_detail);
    TextView time = holder.getView(R.id.item_message_system_time);
    TextView count = holder.getView(R.id.item_message_system_count);
    
    UIConversation data = UIConversation.obtain(conversation, false);
    ProviderTag tag = null;
    if (data == null)
    {
        title.setText(null);
        time.setText(null);
        detail.setText(null);
    }
    else
    {
        String name = null;
        Uri avaterUri = null;
        Contacts contacts =
                mDao.queryContactByAccount(data.getConversationTargetId().replace("E", ""));
    
       if (contacts != null)
        {
            name = contacts.getUname();
            avaterUri = Uri.parse(contacts.getAvatar());
            UiUtils.setPicture(UiUtils.getContext(), avater, avaterUri.toString());
        }
        else
        {
            **//這裏這樣獲取暱稱和頭像是因爲數據庫沒有陌生人的信息，而又要求顯示陌生人的頭像和暱稱，那麼就需要設置（RongIM.getInstance().setCurrentUserInfo(info);RongIM.getInstance().setMessageAttachedUserInfo(true);）這兩個屬性；**
            MessageContent message = conversation.getLatestMessage();
            UserInfo userInfo = message.getUserInfo();
            name = userInfo.getName();
            avaterUri = userInfo.getPortraitUri();
        }
        if (avaterUri == null)
            avater.setImageResource(R.drawable.default_avatar_icon);
        else
            UiUtils.setPicture(mContext, avater, avaterUri.toString());
    
            **//這一句是用來格式化時間的**
        String str = RongDateUtils.getConversationListFormatDate(data.getUIConversationTime(),
                                                                 UiUtils.getContext());
        time.setText(str);
    
        //設置未讀消息數
        int unreadCount = RongIMClient.getInstance().getUnreadCount(
                                 Conversation.ConversationType.PRIVATE,
                                 data.getConversationTargetId());
        if (unreadCount > 0)
        {
            if (unreadCount > 99)
            {
                count.setText(this.mContext.getResources().getString(
                        io.rong.imkit.R.string.rc_message_unread_count));
            }
            else
            {
                count.setText(Integer.toString(unreadCount));
            }
            count.setVisibility(View.VISIBLE);
        }
        else
        {
            count.setVisibility(View.GONE);
        }
    
    
        **//設置消息內容顯示，這段內容是顯示內容的，建議直接用這段段代碼，或者自己去抄源碼，不要自己寫，因爲會有很多不完善，例如表情的顯示，草稿等；**
        if (!mIsQuery)
        {
            if (TextUtils.isEmpty(data.getDraft()) && !data.getMentionedFlag())
            {
                detail.setText(data.getConversationContent());
            }
            else
            {
                SpannableStringBuilder key = new SpannableStringBuilder();
                SpannableString status;
                if (data.getMentionedFlag())
                {
                    status = new SpannableString(UiUtils.getContext().getString(
                             io.rong.imkit.R.string.rc_message_content_mentioned));
                    status.setSpan(new ForegroundColorSpan(
                                    UiUtils.getContext().getResources().getColor(
                                            io.rong.imkit.R.color.rc_mentioned_color)), 0,
                            status.length(),
                            33);
                    key.append(status).append(" ").append(data.getConversationContent());
                }
                else
                {
                    status = new SpannableString(UiUtils.getContext().getString(
                               io.rong.imkit.R.string.rc_message_content_draft));
                    status.setSpan(new ForegroundColorSpan(
                                    UiUtils.getContext().getResources().getColor(
                                            io.rong.imkit.R.color.rc_draft_color)), 0,
                                                                status.length(), 33);
                    key.append(status).append(" ").append(data.getDraft());
                }
                AndroidEmoji.ensure(key);
                detail.setText(key);
            }
        }
        else
        {
            String content = data.getConversationContent().toString();
            SpannableString ss = new SpannableString(content);
            int i = 0;
            while ((i = content.indexOf(keyWords, i)) != -1)
            {
                content = content.substring(i, content.length());
                ss.setSpan(new ForegroundColorSpan(
                                   UiUtils.getResources().getColor(R.color.colorFFFF4E4E)),
                           i, i + keyWords.length(), SPAN_INCLUSIVE_INCLUSIVE);
                i = i + keyWords.length();
            }
            AndroidEmoji.ensure(ss);
            detail.setText(ss);
        }
    
        if (RongContext.getInstance() != null && data.getMessageContent() != null)
        {
            tag = RongContext.getInstance()
                             .getMessageProviderTag(data.getMessageContent().getClass());
        }
    
        if (data.getSentStatus() != null &&
            (data.getSentStatus() == Message.SentStatus.FAILED ||
             data.getSentStatus() == Message.SentStatus.SENDING) && tag != null &&
            tag.showWarning() && data.getConversationSenderId() != null &&
            data.getConversationSenderId().equals(RongIM.getInstance().getCurrentUserId()))
        {
            Bitmap key2 = BitmapFactory.decodeResource(UiUtils.getContext().getResources(),
                           io.rong.imkit.R.drawable.rc_conversation_list_msg_send_failure);
            int status1 = key2.getWidth();
            Drawable drawable = null;
            if (data.getSentStatus() == Message.SentStatus.FAILED &&
                TextUtils.isEmpty(data.getDraft()))
            {
                drawable = UiUtils.getContext()
                                  .getResources()
                                  .getDrawable(
                                          R.drawable.rc_conversation_list_msg_send_failure);
            }
            else if (data.getSentStatus() == Message.SentStatus.SENDING &&
                     TextUtils.isEmpty(data.getDraft()))
            {
                drawable = UiUtils.getContext()
                                  .getResources()
                                  .getDrawable(R.drawable.rc_conversation_list_msg_sending);
            }
    
            if (drawable != null)
            {
                drawable.setBounds(0, 0, status1, status1);
                detail.setCompoundDrawablePadding(10);
                detail.setCompoundDrawables(drawable, null, null, null);
            }
        }
        else
        {
            detail.setCompoundDrawables(null, null, null, null);
        }
    }
    

• Adapter寫好了，加頭就很簡單了；