//打开App所在Google商店的下载页面(评论url)
    public void openCommentUrl()
    {
        Uri uri = Uri.parse("market://details?id=" + this.getPackageName());
        Intent goToMarket = new Intent(Intent.ACTION_VIEW, uri);
        goToMarket.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY |
                Intent.FLAG_ACTIVITY_NEW_DOCUMENT |
                Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
        try {
            this.startActivity(goToMarket);
        } catch (ActivityNotFoundException e) {
            this.startActivity(new Intent(Intent.ACTION_VIEW,
                    Uri.parse("http://play.google.com/store/apps/details?id=" + this.getPackageName())));
        }
    }