AppStoreDownload

registerContentObserverinitHandle

AppStoreProvider

downloadThread

checkfileUri

启动service service中启动info

AppDownloadService

AppDownloadInfoAppSystemFacadeStorageManagerDownloadNotifier

check

startDownloadIfReady

AppDownloadThread

insertData

updatelocked

updateDbsubmit(AppDownloadThread)

isContain

dowinfo

DownloadUtils

start

delete

database

executeDownload(state);

run

updateQueue（appinfo） from dbupdate downloadDateremovedirfile & datadownload

insert

finish

启动下载

handleCallback

AppDownloadInfo-State

sentMessage