近年來隨著智慧型手機的崛起與發展，越來越多手機製造商投入智慧型手機的市場，而手機上作業系統開放、可擴展的架構也漸漸成為趨勢，慢慢取代傳統封閉的手機作業系統；Android是Google新一代推行的智慧型手機平台，其中包括作業系統、中介軟體，以及主要應用程式，使用者能從網路下載所需的軟體。

本論文主要是在Android平台上設計與實作服務跟隨（Service Follower）多媒體播放系統，使用者可以暫停串流檔案的播放，並移到另一平台，經由連線設定後，可以從暫停點繼續播放。因此，可以讓使用者隨時隨地享受服務跟隨多媒體播放系統，達到"服務不中斷"的功能。

為驗證本論文所提出的服務跟隨機制，設計與實做一個具有服務跟隨功能的多媒體串流系統，使得軟體服務可以順利轉移到另一平台。藉由實驗結果，可以證實本論文所提出的服務跟隨架構是可行的。

In recent year, the emergence of the Smartphone and fast-growing lead more and more mobile manufacturer devote to the Smartphone market. The open and extensible architecture has become the trend for the Smartphone OS. It will eventually take the place of the closed system. Android Platform is a new generation of the Smartphone OS powered by Google. It include OS, middleware and key applications. User can download demanding application from Internet.

The purpose of this paper is to design and implement a "Service Following" multimedia player. User can pause streaming media while playing and changing to another Platform. By setting up connection and configuration, user can play the same multimedia from the pause point. As a result, service following multimedia player can provide “the uninterrupted service”, therefore user can enjoy this service anytime, anywhere.

To verify the feasibility of the proposed framework, we had implemented a prototyping system for “Service following” streaming services on Android Platform. In the prototyping system, the client of an ongoing video stream can seamlessly switch from one platform to another. The success of the prototyping system had demonstrated the feasibility of the intended framework.

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