Hack Android Application and Defence

Now Android is the most popular smart device's operating system, at the same time the attacks aimed at Android increases very fast. The security problem is more and more important for Android and the researchers pay more attention to Android's security. This paper analysis the character of Android application file and its load and execute process, then based on the analysis provide two methods to hack Android application: static method and dynamic method. Using this two kinds of method can successful hack Android's application whatever the application is running or not. At last we discuss how to detect and prevent this kind of attacks.