The ability to decode a Quick Response (QR) code image saved on an Android device, rather than directly through a camera, offers enhanced flexibility. It allows users to interact with QR codes encountered within pictures, screenshots, or any other saved image. For instance, a user might receive a screenshot of a promotional offer encoded in a QR code via a messaging application and wish to redeem the offer without needing to find the original source.
This functionality is beneficial for several reasons. It overcomes the limitations of real-time scanning, allowing access to information or promotions embedded within images that might no longer be available for live scanning. Furthermore, it is crucial in situations where the physical QR code is damaged, inaccessible, or only available as a digital representation. This method expands the utility of QR codes and facilitates their use in diverse scenarios.