Layer over zxing scanner

I'm 开发者_运维问答writing an App for Android which uses the ZXing scanner. I'd like to place a layer over this activity to show some customized messages or images while the user is scanning. Is it possible? If so, how?

Thank you very much!

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If you integrated via the Barcode Scanner application, no.

If you put their source code in your app, then you can modify their activity to add in your layer.