消除SDK更新時，有可能會出現這樣的錯誤：
Download interrupted: hostname in certificate didn't match: <dl-ssl.google.com> != <www.google.com>
Download interrupted: Connection to https://dl-ssl.google.com refused
Done. Nothing was installed.
解決辦法是：將https://修改爲http://
修改方法是：如下圖，在Android SDK Manager->Tools-Options...選項界面，
將“Force https://… sources to be fetched using http://…”勾選！
如果還有錯，可以在文件（C:\Windows\System32\drivers\etc\hosts）中，添加如下幾行：
203.208.46.146 www.google.com
203.208.46.146 dl.google.com
203.208.46.146 dl-ssl.google.com