智慧型手機已從硬體功能導向轉成軟體服務導向，客製化的軟體服務讓iPhone和Android的市占率不斷的提高。然而，相對於iPhone，Android為開放性的平台以及具備跨多平台的開發工具，並支援所有Google服務與Adobe Flash。Android也適合多種嵌入式產品。
SIP(Session Initiation Protocol)為信號協定，廣泛被用於控制多媒體通訊，如網路的語音與視訊通話。SIP為3GPP(3rd Generation Partnership Project)信號協定之一，也是在網路串流多媒體服務上，IMS(IP Multimedia Subsystem)架構的單元之一，因此越來越多的廠商開始發展符合SIP的產品，並投入網路電話市場。
本論文主要在Android平台上，運用SIP與Google服務，設計與實作一個多功能的電話簿。本系統是基於Google服務可將聯絡人資料和行程表與Google雲端進行同步更新。此外，使用者能與SIP用戶、Skype用戶或電話用戶進行語音通話，也能傳送電子郵件給聯絡人和瀏覽聯絡人的部落格。

The smart phone has already been changed from function-oriented hardware to service-oriented software, and custom software services cause iPhone and Android market share to increase. However, compared with iPhone, Android is open platform and has the multi-platform development tools, and supports all Google services and Adobe Flash. Android is also suitable for many embedded products.
The SIP (Session Initiation Protocol) is a signaling protocol, widely used for controlling multimedia communication sessions, such as voice and video calls over Internet Protocol (IP). SIP was accepted as a 3GPP (3rd Generation Partnership Project) signaling protocol and element of the IMS (IP Multimedia Subsystem) architecture for IP-based streaming multimedia services, so more and more manufacturers began to develop products that meet the SIP and enter the VoIP market.
The purpose of this thesis is to design and implement a multifunction phonebook using the SIP and Google services on the Android platform. The system can synchronize contacts' data and schedule with Google cloud based on the Google service. Besides, user can make a voice call to SIP user, Skype user or phone user, and user also can send the e-mail to contacts and browse the contact's blog.

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