It's using Apache2.0 license, so legally you can. However, to quote the wiki:
> A common way to comply, in a product that is delivered only in binary form and not source form (e.g. an application download) is to add a mention of the project, and link to its license (in our view, a link to the project website is ultimately also fine), in a "Help" or "About" screen of the application.
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> I've seen license and there is note about "do not just copy the code in apps" or "creating innovative solution" if we using source code.
This just means that it should be based on the app; build should be built on it, not copy it. In plain words, don't create another barcode reader app, rather use it in an application which accepts input as a barcode also (i.e., zxing being a library of the app).
This just means that it should be based on the app; i.e., should be built on it, not copy it. In plain words, don't create another barcode reader app, rather use it in an application which accepts input as a barcode also (i.e., zxing being a library of the app).