private void exitApp(Context context) {

    Intent serviceIntent = new Intent(context, AutoUpdateService.class);
    context.stopService(serviceIntent);

    // 清除通知;
    NotificationManager notiManager =
        (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    notiManager.cancelAll();

    CacheManager.getInstance().clear();

    GlobalVars.clear();

    HttpRequestHelper.shutdown();

    android.os.Process.killProcess(android.os.Process.myPid());
  }
  public ImageLoad4HeadTask(ImageView imageView, String url, boolean isMini) {
    this.imageView = imageView;
    this.url = url;
    this.isMini = isMini;

    imageCache = (ImageCache) CacheManager.getInstance().getCache(ImageCache.class.getName());
    if (StringUtil.isNotEmpty(url)) {
      if (isMini) {
        imageInfo = new CachedImageKey(url, CachedImageKey.IMAGE_HEAD_MINI);
      } else {
        imageInfo = new CachedImageKey(url, CachedImageKey.IMAGE_HEAD_NORMAL);
      }
      if ((wrap = imageCache.get(imageInfo)) != null) {
        bitmap = wrap.getWrap();
        isHit = true;
      }
    }
  }