Is it possible to have a function that can download code from a database and execute it as if it belonged to the app itself?

Question

Android : What I'm trying to say is, let's say I have an app that has the following function

public void FetchCodeAndRun()
{
  ConnectToDatabase();
  String code = FetchCode();
  ExecuteJava(code);
}

I'm in need of this method because I would like to modify pieces of code of an app just by changing code in a database

Any help or any other innovative solution to achive this is appreciated. Thanks in advance :)

http://android-developers.blogspot.com/2011/07/custom-class-loading-in-dalvik.html — Marcin Orlowski, Apr 10 '16 at 09:38
This seems like a really bad idea, what is your use-case? There probably is a better way to achieve what you want. — Niels Masdorp, Apr 10 '16 at 09:43

score 0 · Accepted Answer · answered Apr 10 '16 at 09:39

0

First: I think your design by changing code in database is not very good. And I don't recommend it. However It is possible to execute String as code.

@see this: Run piece of code contained in a String

answered Apr 10 '16 at 09:39

Pavol Loffay

241
3
8

Oh cool, so if I stored a code in the database as a string and this function can Dowbload and execute, It'll work! Thanks a lot – Aravind Balaji Apr 10 '16 at 09:44
If it is ok please accept the answer. Thx – Pavol Loffay Apr 10 '16 at 09:50

score 0 · Answer 2 · answered Apr 10 '16 at 09:46

Probably what you are looking for is BeanShell: http://www.beanshell.org/manual/embeddedmode.html

You need to add a bsh-core.jar in your /lib folder and instantiate Interpreter object which handles the interpretation of the code you will provide to it.

Here is a guide to do that: http://www.androidguys.com/2008/08/06/scripting-your-android-device/

Is it possible to have a function that can download code from a database and execute it as if it belonged to the app itself?

2 Answers2