How to update a class dynamically from the server in Android?

Question

Java

The essence of the problem is this.
We are writing a specialized application that will be out of the market. People far from technology will use it (storekeepers, mechanics, etc.).
The application should be updated from the server without any questions. Root access to phones will not be done.
How to overwrite a concrete class? That is, in case of a change in MakeSell.java, load it from the server into the application.

Answer 1

Loading DEX code over the network

Answer 2

you need to make an intermediate layer
you make an interface with the structure of your class as
a class you implement the interface
everywhere you use a reference to the interface instead of a class class
you compile separately from the project into dex
dex you put it on the server
the application downloads the dex file and loads it via
https://developer.android.com/reference /dalvik/sys...
profit