How to add additional functionality into existing apk file [closed]

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. 开发者_如何学C Closed 11 years ago.

I have an apk file but i have to add some additional functionalities to the existing apk file. Is this possible?

---

if you have develop project and generate apk then you can update with same package. or if you have sign certificate which generated at creation time so you can do it.