接收新信息，在会话中看不到（thread表数据插入/更新失败）

分析原因：收到短信，sms表插入信息，触发器会自动更新thread表，更新失败导致一直有一条未读信息数量显示，但在会话列表中却看不到。
　　　　　　(偶现，低概率。 解决方法：接收新信息插入后，立即查询thread表，如果刚刚的信息查不到，则再次手动更新)

　　　 android\packages\providers\TelephonyProvider\src\com\android\providers\telephony\MmsSmsDatabaseHelper.java中定义了触发器

private void createCommonTriggers(SQLiteDatabase db) {
        // Updates threads table whenever a message is added to sms.
        db.execSQL("CREATE TRIGGER sms_update_thread_on_insert AFTER INSERT ON sms " +
                   SMS_UPDATE_THREAD_DATE_SNIPPET_COUNT_ON_UPDATE);

        // Updates threads table whenever a message in sms is updated.
        db.execSQL("CREATE TRIGGER sms_update_thread_date_subject_on_update AFTER" +
                   "  UPDATE OF " + Sms.DATE + ", " + Sms.BODY + ", " + Sms.TYPE +
                   "  ON sms " +
                   SMS_UPDATE_THREAD_DATE_SNIPPET_COUNT_ON_UPDATE);

        // Updates threads table whenever a message in sms is updated.
        db.execSQL("CREATE TRIGGER sms_update_thread_read_on_update AFTER" +
                   "  UPDATE OF " + Sms.READ +
                   "  ON sms " +
                   "BEGIN " +
                   SMS_UPDATE_THREAD_READ_BODY +
                   "END;");

        // TODO Add triggers for SMS retry-status management.

        // Update the error flag of threads when the error type of
        // a pending MM is updated.
        db.execSQL("CREATE TRIGGER update_threads_error_on_update_mms " +
                   "  AFTER UPDATE OF err_type ON pending_msgs " +
                   "  WHEN (OLD.err_type < 10 AND NEW.err_type >= 10)" +
                   "    OR (OLD.err_type >= 10 AND NEW.err_type < 10) " +
                   "BEGIN" +
                   "  UPDATE threads SET error = " +
                   "    CASE" +
                   "      WHEN NEW.err_type >= 10 THEN error + 1" +
                   "      ELSE error - 1" +
                   "    END " +
                   "  WHERE _id =" +
                   "   (SELECT DISTINCT thread_id" +
                   "    FROM pdu" +
                   "    WHERE _id = NEW.msg_id); " +
                   "END;");

        // Update the error flag of threads after a text message was
        // failed to send/receive.
        db.execSQL("CREATE TRIGGER update_threads_error_on_update_sms " +
                   "  AFTER UPDATE OF type ON sms" +
                   "  WHEN (OLD.type != 5 AND NEW.type = 5)" +
                   "    OR (OLD.type = 5 AND NEW.type != 5) " +
                   "BEGIN " +
                   "  UPDATE threads SET error = " +
                   "    CASE" +
                   "      WHEN NEW.type = 5 THEN error + 1" +
                   "      ELSE error - 1" +
                   "    END " +
                   "  WHERE _id = NEW.thread_id; " +
                   "END;");
    }

　　Ril层接收新信息会通过Framework发通知——android.provider.Telephony.SMS_DELIVER

　　 APP层MMS开始处理com.android.mms.transaction.PrivilegedSmsReceiver接收广播， 　

com.android.mms.transaction.SmsReceiverService调用handleSmsReceived(intent, error)方法，
————>saveMessageToPhone(msgs, error, format)————> insertMessage(this, msgs, error, format)
————>storeMessage(context, msgs, error);

storeMessage(context, msgs, error)方法最后，增加查询thread表，确认信息更新是否成功，如果thread表信息更新失败，手动更新.

 private Uri storeMessage(Context context, SmsMessage[] msgs, int error) {
        // Check to see whether short message count is up to 2000 for cmcc
        if (MessageUtils.checkIsPhoneMessageFull(this)) {
            return null;
        }

        SmsMessage sms = msgs[0];

        // Store the message in the content provider.
        ContentValues values = extractContentValues(sms);
        values.put(Sms.ERROR_CODE, error);
        values.put(Sms.PHONE_ID, SubscriptionManager.getPhoneId(sms.getSubId()));

        int pduCount = msgs.length;

        if (pduCount == 1) {
            // There is only one part, so grab the body directly.
            values.put(Inbox.BODY, replaceFormFeeds(sms.getDisplayMessageBody()));
        } else {
            // Build up the body from the parts.
            StringBuilder body = new StringBuilder();
            for (int i = 0; i < pduCount; i++) {
                sms = msgs[i];
                if (sms.mWrappedSmsMessage != null) {
                    body.append(sms.getDisplayMessageBody());
                }
            }
            values.put(Inbox.BODY, replaceFormFeeds(body.toString()));
        }

        // Make sure we've got a thread id so after the insert we'll be able to delete
        // excess messages.
        Long threadId = values.getAsLong(Sms.THREAD_ID);
        String address = values.getAsString(Sms.ADDRESS);

        // Code for debugging and easy injection of short codes, non email addresses, etc.
        // See Contact.isAlphaNumber() for further comments and results.
//        switch (count++ % 8) {
//            case 0: address = "AB12"; break;
//            case 1: address = "12"; break;
//            case 2: address = "Jello123"; break;
//            case 3: address = "T-Mobile"; break;
//            case 4: address = "Mobile1"; break;
//            case 5: address = "Dogs77"; break;
//            case 6: address = "****1"; break;
//            case 7: address = "#4#5#6#"; break;
//        }

        if (!TextUtils.isEmpty(address)) {
            Contact cacheContact = Contact.get(address,true);
            if (cacheContact != null) {
                address = cacheContact.getNumber();
            }
        } else if (TextUtils.isEmpty(address)
                && getResources().getBoolean(R.bool.def_hide_unknown_sender)) {
            values.put(Sms.ADDRESS, "");
        } else {
            address = getString(R.string.unknown_sender);
            values.put(Sms.ADDRESS, address);
        }

        if (((threadId == null) || (threadId == 0)) && (address != null)) {
            threadId = Conversation.getOrCreateThreadId(context, address);
            values.put(Sms.THREAD_ID, threadId);
        }

        ContentResolver resolver = context.getContentResolver();

        Uri insertedUri = SqliteWrapper.insert(context, resolver, Inbox.CONTENT_URI, values);

        // Now make sure we're not over the limit in stored messages
        Recycler.getSmsRecycler().deleteOldMessagesByThreadId(context, threadId);
        MmsWidgetProvider.notifyDatasetChanged(context);

 //---add by antoon ----------------------------------------------------------------------------------------------------
        //query thread to check if thread update or create successfully, if not update here
        StringBuilder sbUri = new StringBuilder(3);
        sbUri.append("content://mms-sms/conversations/").append(threadId).append("/recipients");
        Cursor curosr = resolver.query(Uri.parse(sbUri.toString()),null,null,null,null);
        Log.i("antoon", "SmsReceiverService, --> storeMessage , curosr = "+curosr);
        if(curosr == null || curosr.getCount()==0){
            SqliteWrapper.insert(context, resolver, Telephony.Threads.CONTENT_URI, values);//------手动更新thread表
        }else{
            Log.d("antoon", "SmsReceiverService, --> storeMessage , curosr.getCount = " + curosr.getCount());
        }
//---end add by antoon -------------------------------------------------------------------------------------------------

        return insertedUri;
    }

TelephonyProvider中增加相应的数据库处理。 android\packages\providers\TelephonyProvider\src\com\android\providers\telephony\MmsSmsProvider.java中增加 insert/update 处理

@Override
    public Uri insert(Uri uri, ContentValues values) {
        if (URI_MATCHER.match(uri) == URI_PENDING_MSG) {
            SQLiteDatabase db = mOpenHelper.getWritableDatabase();
            long rowId = db.insert(TABLE_PENDING_MSG, null, values);
            return Uri.parse(uri + "/" + rowId);
        }
//------ add by antoon
        else if(URI_MATCHER.match(uri) == URI_CONVERSATIONS){
            Log.i("antoon", "MmsSmsProvider -> insert,  URI_CONVERSATIONS");
            insertThreadsIfDataLost(values);
            return null;
        }

//------ end add by antoon
        throw new UnsupportedOperationException(NO_DELETES_INSERTS_OR_UPDATES + uri);
    }

//------add by antoon, create thread data if thread trigger fail
    public void insertThreadsIfDataLost(ContentValues values) {
        long _id = values.getAsLong(Sms.THREAD_ID);
        long date = values.getAsLong(Sms.DATE);
        String snippet = values.getAsString(Sms.BODY);
        String address = values.getAsString(Sms.ADDRESS);

        //create a new thread id with new msg address, then update threadId to _id
        List<String> list = new ArrayList<String>();
        list.add(address);
        Cursor cursor = getThreadId(list, false);//------这里的查询会判断threadId是否存在，如果不存在则创建threadId新数据，如果存在则直接返回。
        cursor.moveToFirst();
        long threadId = cursor.getLong(0);
        cursor.close();
        /*
        String updateSql = "UPDATE threads SET date = ?, snippet = ?, snippet_cs = 0, read=0, "
                + "message_count = (SELECT COUNT(sms._id) FROM sms WHERE sms.thread_id = ? AND sms.type!= 3) + "
                +"(SELECT COUNT(pdu._id) FROM pdu WHERE pdu.thread_id = ? AND (m_type=132 OR m_type=130 OR m_type=128) AND msg_box!= 3)"
                + " WHERE threads._id = ?";
        */

        StringBuilder sqlSb = new StringBuilder(14);
        sqlSb.append("UPDATE threads SET _id =").append(_id)
                .append(", date =").append(date)
                .append(", snippet ='").append(snippet)
                .append("', snippet_cs = 0, read=0, ")
                .append("message_count = (SELECT COUNT(sms._id) FROM sms WHERE sms.thread_id = ").append(threadId)
                .append(" AND sms.type!= 3) + (SELECT COUNT(pdu._id) FROM pdu WHERE pdu.thread_id =").append(threadId)
                .append(" AND (m_type=132 OR m_type=130 OR m_type=128) AND msg_box!= 3) WHERE threads._id = ").append(threadId)
                ;

        SQLiteDatabase db = mOpenHelper.getReadableDatabase();
        db.execSQL(sqlSb.toString());

        Log.i("antoon", "sqlSb = " + sqlSb);
    }
//------end add by antoon