Multiple applications sharing the same data directory

Question

my ultimate goal is to have two applications, the “main” application (which will do all the work that the user wants to do), and the “license” application, which will check if the application is licensed.

My question is: how can I get my licensed application (com.example.myapp.licence) for sharing the same data directory as with my main application (com.example.myapp) ??

Answer 1

You need to modify the manifest files for both applications, add the same "android: sharedUserId" element for both manifest nodes.

eg.

<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:sharedUserId="com.mycompany.myapp" .... /> 

If both applications have the same sharedUserId, they can access other data folders.

I forgot to add: obviously, you need to sign both applications with the same private key with the same alias.