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> So an apk may just load some zip/apk/dex code from external storage and execute it in current context.

Wouldn't this break all kinds of things, like app sandboxing, the permission system, app intents, …?

… launcher shortcuts, launcher widgets, storage management, multi-process set-ups or even services (those need to be declared statically in the manifest), so yeah it would.

So interesting as a fun exercise, but not really useful for probably quite a few apps.

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