bdbus_lxb下载

一个城市对应一个数据记录和一个（离线）数据, 下载时一个下载记录

///------------------MainActivity------------------

MainActivity.showView
(1)检查城市CityID和CityName

(2)MainActivity.initView
MainActivity.checkAppUpdate (检查应用更新)
create UpdateRequestAdapter http://dl.imap.baidu.com/s/UpdateInfo.php?sv=&qt=&key=
UpdateRequestAdapter.addCallBackListener mUpdatecallback
startHttpTask

mUpdatecallback.onCallBack
      (1)MainActivity.mHandle.sendEmptyMessage UPDATE_INFO
      (2)MainActivity.mHandle.sendEmptyMessage START_CHECK_UNFINISH

MainActivity.mHandle.handleMessage START_CHECK_UNFINISH
MainActivity.startCheckUnfinshTask

MainActivity.CheckUnfinshTask.doInBackground (检查中断的下载)
      取数据库DownloadRecord个数

MainActivity.CheckUnfinshTask.onPostExecute
(1) MainActivity.CheckUnfinshTask.showUnfinshDialog (有下载记录)
      (1)AlertDialog.onClick BUTTON_POSITIVE
            startService UpdateService FLAG_CHECK_ALL_UNFINSH_DOWNLOAD
            MainActivity.startCheckDataUpdate
      (2)AlertDialog.onClick BUTTON_NEGATIVE
            MainActivity.startClearDownloadRecordTask
(2)MainActivity.startCheckDataUpdate
MainActivity.startCheckDataUpdate

MainActivity.DataUpdateInfoTask.doInBackground  (检查更新)
      DataUpdateInfoAction.queryDataUpdateInfo http://bs.baidu.com/offlinebusdata/download/131/meta.txt
      DataUpdateInfo.versionCode <= DataRecord.version
            return FLAG_DONOT_UPDATE
      DataUpdateInfo.versionCode <= DownloadRecord.version
            return FLAG_DONOT_UPDATE
      删除中断DownloadRecord(或null) 
      startService UpdateService FLAG_CANCLE_SINGLE_DOWNLOAD  (取消下载)
      new DownloadRecord (创建DownloadRecord),用DataUpdateInfo初始化
      return FLAG_UPDATE_NODATA/FLAG_UPDATE_HASDATA

MainActivity.DataUpdateInfoTask.onPostExecute
      (1)FLAG_UPDATE_HASDATA (更新)
            showDataUpdateDialog(true);
      (2)FLAG_UPDATE_NODATA (新下)
            showDataUpdateDialog(false);
      (3)FLAG_DONOT_UPDATE (不需要更新/中断版本最新)
            return;
MainActivity.DataUpdateInfoTask.showDataUpdateDialog
AlertDialog.onClick BUTTON_POSITIVE
MainActivity.startCreateDownloadRecordTask

MainActivity.CreateDownloadRecordTask.doInBackground
      DownloadRecord插入数据库
      startService UpdateService FLAG_CHECK_SINGLE_UPDATE_DOWNLOAD
------------------MainActivity------------------///
///------------------MoreActivity------------------
MoreActivity.onClick mCheckOfflineLayout
MoreActivity.startCheckDataUpdate

MoreActivity.DataUpdateInfoTask.doInBackground
      DataUpdateInfoAction.queryDataUpdateInfo
            return FLAG_NO_DATA (没有DataUpdateInfo)
      DataUpdateInfo.versionCode <= DataRecord.version
            return FLAG_DONOT_UPDATE
      DataUpdateInfo.versionCode <= DownloadRecord.version(中断的)
            return FLAG_UPDATE_NODATA/FLAG_UPDATE_HASDATA (用中断DownloadRecord)
      删除中断DownloadRecord(或null)
      startService UpdateService FLAG_CANCLE_SINGLE_DOWNLOAD (停止下载)
      new DownloadRecord
      return FLAG_UPDATE_NODATA/FLAG_UPDATE_HASDATA

MoreActivity.DataUpdateInfoTask.onPostExecute
      (1)FLAG_NO_DATA 
            return;
      (2)FALG_DONOT_UPDATE
            return;
      (3)FLAG_UPDATE_NODATA/FLAG_UPDATE_HASDATA
            MoreActivity.DataUpdateInfoTask.showDataUpdateDialog
            AlertDialog.onClick BUTTON_POSITIVE
            MoreActivity.startCreateDownloadRecordTask

MoreActivity.CreateDownloadRecordTask.doInBackground
      DownloadRecord更新数据库(删旧插新)
      startService UpdateService FLAG_CHECK_SINGLE_UPDATE_DOWNLOAD
------------------MoreActivity------------------///
///------------------UpdateService------------------
UpdateService.onStartCommand FLAG_CHECK_SINGLE_UPDATE_DOWNLOAD 【1】
UpdateService.startDownload
      new DownloadFutureTask(DownLoadRunnable)
ThreadPool.execute DownloadFutureTask
      ThreadPool.execute DownloadFutureTask

DownLoadRunnable.run
      SD卡 
      SD卡剩余空间 
      若已有数据文件，则比较MD5:DownloadRecord.MD5与/mnt/sdcard/BaiduBus/131/1354124148114.bdp
            DownLoadRunnable.showDownloadSucc
      HttpClient.execute HttpGet http://bs.baidu.com/offlinebusdata/download/131/131.1354123803701 (请求离线数据)
      UpdateService.saveFile /mnt/sdcard/BaiduBus/131/1354124148114.bdp
            DownLoadRunnable.showDownLoadPercent (保存进度)
      (1)DownLoadRunnable.showDownloadSucc
            UpdateDB(DownloadRecord)
                  删除（数据库原有）DataRecord 
                  new DataRecord (创建DataRecord，插入数据库)
                  delete DownloadRecord (删除数据库DownloadRecord)
      (2)DownLoadRunnable.showDownloadFail

UpdateService.onStartCommand FLAG_CHECK_ALL_UNFINSH_DOWNLOAD 【2】
UpdateService.startCheckAllUnfinshed
new CheckAllUnFinishRunnable
ThreadPool.execute CheckAllUnFinishRunnable

UpdateService.CheckAllUnFinishRunnable.run
      遍历List<DownloadRecord> 
              UpdateService.startDownload

UpdateService.onStartCommand FLAG_CANCLE_SINGLE_DOWNLOAD【3】
UpdateService.stopDownLoad
      DownloadFutureTask.cancel
      Map.remove

UpdateService.onStartCommand FLAG_CANCLE_ALL_DOWNLOAD 【4】
UpdateService.stopAllDownLoad
DownloadFutureTask.cancel (遍历)
Map.clear
ThreadPool.shutDown
------------------UpdateService------------------///