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1. #Best android qr code reader 2017 how to
2. #Best android qr code reader 2017 mac os x
3. #Best android qr code reader 2017 full

I decided to take advantage of the built-in System.Messaging publish/subscribe mechanism using the default TMessageManager to send and receive messages through all the app. On the MainForm you can see the TFrameStand instance that will orchestrate the UI through all the app. TInfoFrame (not listed in the above diagram) is used to show a simple credits layout about the app and libraries used.TScanResultFrame is used to present the user the successfully scanned barcode informations like format, date of (first) acquisition, a picture of the frame with some markers indicating the barcode position and a couple of actions to let the user delete the current item or share the content of the barcode through the system’s ShareSheet.TDataFrame has a TListView with DynamicAppearance and is used to present to the user the so far scanned barcodes, including details per each item like a thumbnail, the barcode format, the content and a counter of how many times that specific barcode has been scanned (since the start of the app) clicking on an item will lead to the details (see next point in this list).TScanningFrame is responsible to help the user acquire the barcode by painting the camera’s frames on a TRectangle (faster than a TImage) and hosts an informative label about current camera resolution (and FPS even if it seems to be hardcoded in Android) and a button to toggle the torch mode (where available) that may help when there is no sufficient light in the room during the scanning, you may see some TRectangle(s) being drawn over the camera’s frame, to indicate the ZXing.Delphi library detected something possibly being a barcode there.

I want to thank Edward for the kind suggestions (and corrections to my code) he gave me during the development of this app.Īll the important code is in the main datamodule ( MainDM) including the TCameraComponent used to grab frames from the device camera, the TFDMemTable used as storage for result data and all the ZXing.Delphi related code.Įach frame is used to present a different piece of UI to the user, reflecting the app status and data available: The library is very easy to use, fast, has good support to all major barcode formats and has been recently updated with a farther performance improvement tied to inverted barcode recognition (now optional, so you can save time if you don’t need to read inverted barcodes). Thanks to Edward Spelt and his Delphi library (that I would suggest to be added here) we all can benefit and easily build barcode-enabled multi-platform applications with Delphi! Net C#, php, Objective-C, python, JavaScript and … Delphi! 🙂 ). The ZXing project is the most popular open source barcode scanning library in Java and has been ported to different languages (C++.

#Best android qr code reader 2017 how to

So I decided to build this FMX application trying to provide a tangible example about how to structure a simple Delphi mobile app that access sensors (camera can be considered a sensor), stores values and present them to the user through a minimal UI.

#Best android qr code reader 2017 mac os x

#Best android qr code reader 2017 full

it gives you full control on all details of the scanning phase: you can provide a bitmap to the library and ask for a search of desired code types so you may want to get a frame from a camera (deciding resolution if you care), add some pre-processing if needed and get some additional informations about the result, like the exact position of the found code in the bitmap.

it does not create a dependency with a third party app (or/and the way to communicate with it).This time I tried to have more control and decided to integrate a library for QR code recognition directly into my FMX app. I already covered this argument on my blog, at XE5 time and later with XE7, but with a different approach: launch a third-party barcode scanner app and get results through clipboards or Android intent infrastructure. While preparing material for the last Delphi mobile training course I gave, I received questions about building a solution to read barcodes / QR codes in a Delphi mobile app. QR codes (barcodes, in general) are really handy when you need to join the physical world with the digital one, simply put a QR code on an item or in a physical place and that item/place is now digitally tagged (and you can take advantage of this in your applications).

Sometimes, a video is better than a thousand words: here it is a 45 seconds video showcasing ScannerMApp 🙂