主要文件說(shuō)明

• MainEntry : 主界面
• SystemUpdateService：版本檢測(cè)服務(wù)蔗喂，
• SessionStateControlThread:去執(zhí)行檢測(cè)和下載的線程忘渔；
• HttpManager：網(wǎng)絡(luò)請(qǐng)求的發(fā)起和數(shù)據(jù)解析，版本檢測(cè)狀態(tài)通知的發(fā)出者
• OtaPkgManagerActivity:顯示版本狀態(tài)缰儿，下載和安裝的入口
• DownloadInfo 狀態(tài)的保存與查詢接口
• SystemUpdateRecever 廣播接收器畦粮，開機(jī)自動(dòng)檢測(cè)版本等

主要流程

MainEntry 在啟動(dòng)時(shí)綁定服務(wù),并調(diào)用SystemUpdateService 的版本查詢接口

@Override
protected void onStart()    
{
  ...
  if (activityId < 0) {
        SdPkgInstallActivity.stopSelf();
        OtaPkgManagerActivity.stopSelf();

        Intent serviceIntent = new Intent(this, SystemUpdateService.class);
        bindService(serviceIntent, mConnection, Context.BIND_AUTO_CREATE);
    } }

 private ServiceConnection mConnection = new ServiceConnection() {

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
      mService = ((SystemUpdateService.ServiceBinder) service).getService();
       if (mService != null) {
            mService.setHandler(mUiHandler);
        }

        boolean needRescan = mDownloadInfo.getIfNeedRefresh();
        if (needRescan
                || (!loadHistoryPackage()
                && DownloadInfo.STATE_NEWVERSION_READY
                    != mDownloadInfo.getDLSessionStatus())) {
              queryPackagesInternal();
        } else {
            Xlog.d(TAG, "[onServiceConnected], DON'T need query, load from file");
            refreshUI();
        }
    }
};

private void queryPackagesInternal() {
  ...
    if (mService != null) {
        mService.queryPackages();
    }
}

SystemUpdateServcie 啟動(dòng)線程去執(zhí)行版本的檢查，

QQ圖片20170215163851.png

SessionControlThread 的執(zhí)行方法如下乖阵，它負(fù)責(zé)查詢和下載的具體任務(wù)宣赔。

QQ圖片20170215164221.png

查詢線程啟動(dòng)HttpManager 中的查詢接口checkNewVersion，訪問(wèn)OTA服務(wù)器瞪浸，并對(duì)查詢結(jié)果進(jìn)行解析儒将，如果有新版本信息，就會(huì)更新DownloadInfo中的狀態(tài)值对蒲，然后發(fā)送查詢結(jié)束的廣播钩蚊。

queryNewVersion.png

    private boolean checkNewVersion() {
       ...
        HttpResponse response = doPost(url, null, bnvpa);
        if (response == null) {
            Xlog.i(TAG, "onCheckNewVersion: response = null");
            mErrorCode = HTTP_UNKNOWN_ERROR;
            return false;
        }
        StatusLine status = response.getStatusLine();
      ...
        String content = getChunkedContent(response.getEntity());
      ...解析服務(wù)器返回的數(shù)據(jù)
        HttpResponseContent res = parseCheckVersionInfo(content);

        if (res == null) {
            return false;
        }
        if (res.mFileSize <= 0 || res.mPkgId < 0) {
            mErrorCode = HTTP_RESPONSE_NO_NEW_VERSION;
            Xlog.i(TAG, "onCheckNewVersion, fileSize = " + res.mFileSize + ", deltaId = "
                    + res.mPkgId);
            return false;
        }

        if ((!res.mIsFullPkg) && (!checkFingerPrint(res.mFingerprint))) {
            mErrorCode = HTTP_RESPONSE_NO_NEW_VERSION;
            return false;
        }
        mDownloadInfo.setDLSessionDeltaId(res.mPkgId);
        mDownloadInfo.setFullPkgFlag(res.mIsFullPkg);
        mDownloadInfo.setUpdateImageSize(res.mFileSize);
        mDownloadInfo.setVersionNote(res.mReleaseNote);
        mDownloadInfo.setVerNum(res.mVersionName);
        mDownloadInfo.setAndroidNum(res.mAndroidNum);
        mDownloadInfo.setDLSessionStatus(DownloadInfo.STATE_NEWVERSION_READY);

        return true;
    } catch (IOException e) {
        e.printStackTrace();
        mErrorCode = HTTP_RESPONSE_AUTHEN_ERROR;
        return false;
    }
}

HttpMangager 發(fā)送查詢結(jié)束的廣播后，EntryActivity 收到此廣播蹈矮，更新UI,顯示由新版本砰逻。

private Handler mUiHandler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        switch (msg.what) {
       ...
        case SystemUpdateService.MSG_NOTIFY_QUERY_DONE:

            processOtaBehavior();

            break;

刷新界面，跳轉(zhuǎn)到OtaPkgManagerActivity含滴，此時(shí)顯示界面上的更新記錄和下載按鈕诱渤，點(diǎn)擊下載按鈕后丐巫，

    private void refreshUI() {
   
    int size = (mUpdateInfoList == null) ? 0 : mUpdateInfoList.size();
    mParentPreference.removeAll();

    boolean isOtaExist = isOtaPackageExist();

    if (isOtaExist || size > 0) {
        mIsFoundNewVersion = true;

        if (mIsStopping && mIsQuerying) {
            Xlog.v(TAG, "[refreshUI] is stopping, show notification instead");
            mNotification.showNewVersionNotification();
            mIsFoundNewVersion = false;
            return;
        }

        mIsQuerying = false;

    }

    if (isOtaExist) {
        if (size == 0) {
            Xlog.v(TAG, "[refreshUI] Only OTA package exists, start OTA detail");
            Intent intent = getInfoIntent(null);
            mIsTurnToDetail = true;
            startActivity(intent);
            finish();
            return;

        } 

在OtaPackageManagerActivity一啟動(dòng)谈况，就會(huì)根據(jù)DownloadInfo中的狀態(tài)值來(lái)顯示相應(yīng)的界面和進(jìn)行相應(yīng)的處理。上一步查詢到有新版本的時(shí)候递胧，已經(jīng)把狀態(tài)設(shè)置為STATE_NEWVERSION_READY了碑韵，這里就會(huì)顯示下載按鈕。下載的動(dòng)作又會(huì)回到SystemUpdateService中的 startDlPkg()接口缎脾，啟動(dòng)一個(gè)SessionControlThread 進(jìn)行下載祝闻，下載的網(wǎng)絡(luò)處理還是由HttpManager 來(lái)處理，實(shí)際操作在onDownloadImage（）中

  private void showUILayout(int state) {
    switch (state) {
    case DownloadInfo.STATE_QUERYNEWVERSION:
        requeryPackages();
        break;

    case DownloadInfo.STATE_NEWVERSION_READY:
        setContentView(R.layout.ota_package_download);
        mDownloadBtn = (Button) this.findViewById(R.id.btn_download);
        mDownloadBtn.setText(R.string.btn_download);
        mDownloadBtn.setOnClickListener(mDlListener);
        removeProBar();
        mMenuStatus = MenuStatus.Menu_Download;
        invalidateOptionsMenu();
        initWifiOnlyCheckbox(true, true);
        fillPkgInfo(mDownloadInfo.getAndroidNum(), mDownloadInfo.getVerNum(),         mDownloadInfo.getUpdateImageSize(),
                    Util.getPackageFileName(this));

        break;
    case DownloadInfo.STATE_DOWNLOADING:
        showDlInterface();
        break;

    void onDownloadImage() {
     mNotification.showDownloadingNotificaton(mDownloadInfo.getVerNum(), (int) (((double) Util
            .getFileSize(Util
                    .getPackageFileName(mContext)) / (double) mDownloadInfo
            .getUpdateImageSize()) * 100), true);

    if (mIsDownloading) {
        return;
    }
    mIsDownloading = true;
    notifyDlStarted();

    boolean isunzip = mDownloadInfo.getDLSessionUnzipState();
    boolean isren = mDownloadInfo.getDLSessionRenameState();
    if (isren && isunzip) {
        setNotDownload();
        UpgradePkgManager.deleteCrashPkgFile(Util.getPackagePathName(mContext));
        onDownloadPackageUnzipAndCheck();
        return;
    }
    mDownloadInfo.setDLSessionStatus(DownloadInfo.STATE_DOWNLOADING);
    String strNetWorkType = mDownloadInfo.getIfWifiDLOnly() ? NETTYPE_WIFI : "";

    if (!Util.isNetWorkAvailable(mContext, strNetWorkType)) {
        mErrorCode = HTTP_RESPONSE_NETWORK_ERROR;

        sendErrorMessage();
        setPauseState();
        setNotDownload();

        return;
    }


    HttpResponse response = doPost(url, null, bnvpa);

    if (mDownloadInfo.getDLSessionStatus() != DownloadInfo.STATE_DOWNLOADING) {
        Xlog.i(TAG, "onDownloadImage: status not right");
        setNotDownload();
        return;
    }
    ...
    StatusLine status = response.getStatusLine();

    Intent service = new Intent(mContext, SystemUpdateService.class);
    service.setAction(Util.Action.ACTION_LCA_PROTECT);
    mContext.startService(service);
    int ret = writeFile(response, currentSize);
    mContext.stopService(service);
    // Thread.currentThread().setPriority(Thread.NORM_PRIORITY);
    Xlog.i(TAG, "onDownloadImage, download result = " + ret);

    if (ret == 0) {
        int downloadStatus = mDownloadInfo.getDLSessionStatus();

        if (downloadStatus == DownloadInfo.STATE_PAUSEDOWNLOAD
                || downloadStatus == DownloadInfo.STATE_QUERYNEWVERSION) {
            setNotDownload();
            return;
        }

    }
    if (ret == HTTP_DETECTED_SDCARD_CRASH_OR_UNMOUNT) {
        // resetDescriptionInfo();
        resetDownloadFile();
        sendErrorMessage();
        setNotDownload();
        return;
    }
    if (ret == HTTP_RESPONSE_NETWORK_ERROR) {

        setNotDownload();

        checkIfAutoDl();

        return;
    }

    if (ret == HTTP_FILE_NOT_EXIST) {
        setNotDownload();
        return;
    }
    onDownloadPackageUnzipAndCheck();
    mIsDownloading = false;
}

在下載完成后進(jìn)行包的解壓和校驗(yàn)工作，成功后進(jìn)入安裝步驟联喘，安裝時(shí)啟動(dòng)的另外一個(gè)App中的服務(wù)华蜒，然后重啟系統(tǒng)，進(jìn)入recovery模式豁遭，完成系統(tǒng)升級(jí)叭喜。

     class InstallPkgThread extends Thread {
    /**
     * Main executing function of this thread.
     */
    public void run() {
        if (checkUpgradePackage() && setInstallInfo(mPkgPath, mTarVer)) {
            notifyUserInstall();
            Intent intent = new Intent();
            intent.setComponent(new ComponentName("com.mediatek.systemupdate.sysoper",
                    "com.mediatek.systemupdate.sysoper.RebootRecoveryService"));
            startService(intent);
        } else {
            return;
        }
    }

}


private boolean setInstallInfo(String strPkgPath, String strTarVer) {
    Xlog.i(TAG, "onSetRebootRecoveryFlag");

    try {
        IBinder binder = ServiceManager.getService("GoogleOtaBinder");
        SystemUpdateBinder agent = SystemUpdateBinder.Stub.asInterface(binder);

        if (agent == null) {
            Xlog.e(TAG, "agent is null");
            return false;
        }

        if (Util.isEmmcSupport()) {
            if (!agent.clearUpdateResult()) {
                Xlog.e(TAG, "clearUpdateResult() false");
                return false;
            }
        }

        DownloadInfo dlInfo = DownloadInfo.getInstance(getApplicationContext());
        dlInfo.setTargetVer(strTarVer);

        Xlog.i(TAG, "setTargetVer");

        if (!agent.setRebootFlag()) {
            Xlog.e(TAG, "setRebootFlag() false");
            return false;
        }

        Xlog.i(TAG, "setRebootFlag");

        dlInfo.setUpgradeStartedState(true);

        dlInfo.resetDownloadInfo();

        Intent intent = new Intent();
        intent.setComponent(new ComponentName("com.mediatek.systemupdate.sysoper",
                "com.mediatek.systemupdate.sysoper.WriteCommandService"));
        intent.putExtra(COMMAND_PART2, OTA_PATH_IN_RECOVERY_PRE + strPkgPath);
        startService(intent);
        return true;
    } catch (RemoteException e) {
        e.printStackTrace();
        return false;
    }
}

其中，在SystemUpdateRecever中會(huì)接收系統(tǒng)開機(jī)廣播蓖谢，并判斷是周幾捂蕴，然后根據(jù)util中的配置信息，自動(dòng)檢測(cè)版本闪幽。