关键词: 安卓应用, HTTP缓存, 程序改造, 动态检测

Abstract: Both users and developers of Android application are concerned with data traffic consumption and response time of an application. To solve these problems, many mobile applications make use of cache (especially HTTP cache) to effectively reduce traffic and energy consumption, and improve responsiveness. However, the proper use of cache in a mobile application is related to the application??s features and specific functions. The improper use of cache in many applications not only would be ineffective, but also waste precious storage space in mobile device. For this purpose, this paper proposes a dynamic analysis based automatic detection method of HTTP cache deficiencies of Android Apps, which can dynamically monitor interior cache behavior of Apps, and analyze whether there are   deficiencies, and what kinds of deficiencies. This paper realizes a corresponding runtime library and an automated program transformation tool of Android application, and conducts an experiment on 25 present Android applications. The results show that the method is applicable for a large part of applications, and can effectively find problems like lack of cache, unlimited cache space and redundant cache in Android applications.

Key words: Android applications, HTTP cache, program transformation, dynamic detection