1. 加载会话列表分两步加载。

且第1步和第2步之间有些延迟，便于第1步的结果及时在ListView中显示出来。

mHandler.postDelayed(new LoadThreadsExtra(), 200);

第1步。从threads表中查找出数据，封装成TxrjThread，构建ConversationAdapter，在ListView中显示出来。

第2步。从sms, canonical_address, data等表中查找出hasDraftMsg, hasFailMsg, unreadCount, number, name等信息，调用notifyDataChanged()更新数据。

class LoadThreadsExtra implements Runnable {

   

    List<Long> draftIds = null;

    List<Long> failIds = null;

    Map<Long, Integer> unreadMap = null;

    Map<Integer, String> canonicalAddrMap = null;

    Map<String, String> nameAddrMap = null;

    @Override

    public void run() {

        draftIds = SmsDataManager.getThreadsWithDraftMsg(mContext);

        failIds = SmsDataManager.getThreadsWithFailedMsg(mContext);

        unreadMap = SmsDataManager.getThreadUnreadCountMap(mContext);

        canonicalAddrMap = SmsDataManager.getCanonicalAddressMap(mContext);

        nameAddrMap = SmsDataManager.getNameAddressMap(mContext);

       

        int threadCount = mThreads.size();

        for(int i=0;i<threadCount;i++){

            TxrjThreads thread = mThreads.get(i);

            long threadId = thread.getThreadId();

            thread.setHasDraftMsg(draftIds.contains(threadId));

            thread.setHasFailMsg(failIds.contains(threadId));

            thread.setUnReadCount(unreadMap.containsKey(threadId) ? unreadMap.get(threadId) : 0);

            setNameNumber(thread, thread.getRecipientId());

        }

       

        mHandler.sendEmptyMessage(TxrjConstant.WHAT_NOTIFY_DATA_CHANGED);

    }

   

    private void setNameNumber(TxrjThreads thread, String recipientIds) {

        // 提取Number.

        String[] ids = recipientIds.trim().split(" ");

        StringBuffer sb = new StringBuffer();

        for (int i = 0; i < ids.length; i++) {

            sb.append(canonicalAddrMap.get(Integer.valueOf(ids[i])));

            if (i != ids.length - 1) {

                sb.append(",");

            }

        }

        thread.setNumber(sb.toString());

        sb = new StringBuffer();

        // 提取Name.

        String[] numbers = thread.getNumber().split(",");

        for (int i = 0; i < numbers.length; i++) {

            String name = nameAddrMap.get(numbers[i]);

            sb.append(name == null ? numbers[i] : name);

            if (i != numbers.length - 1) {

                sb.append(",");

            }

        }

        thread.setName(sb.toString());

    }

}

2. 进入ConversationListActivity界面中，在加载数据之前也要延迟一点时间，便于Activity将UI及时显示出来，避免了UI显示慢的现象。

mHandler.postDelayed(new Runnable() {

    public void run() {

        new LoadThreadsTask().execute();

    }

}, 200);