Se for pela câmera, acredito que não... Veja: http://developer.android.com/guide/topics/media/camera.html
Se for um Qr que já está no device... provavelmente é só iniciar um thread para processar o mesmo.
att.
--
Carlos Eduardo Simões Pelegrin
2014-07-02 15:05 GMT-03:00 Toshi Ossada <toshi.ohkawa@gmail.com>:
Bom dia a todos,--É possivel criar uma aplicação que fique lendo QrCode em Background?[]'s
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