Here is another scanner that is 100% embedded in B4A. It wraps this Github project and will only scan QR Codes (it uses the ZXING engine for decoding scanned QR Codes). It will keep on reading QR codes for as long as what it finds a valid QR code. It is quite a "speedy" scanner. It does not require any other barcode scanner app to be installed on your device - it is 100% standalone. You can customize your B4A activity / UI by adding buttons, labels, panels, images, etc etc and change colors to your liking - 100% B4A customizable.
Note that a panel is the parent of the custom view but seeing that the original project extends Surface View it will punch a hole in the panel when the scanner starts.
Also note the permissions in the B4A project's manifest file (I know majority are redundant for this project).
You will have to handle consecutive / continuous scans of the same QR code within your B4A code.
Posting the following:
1. B4A project
2. B4A library files (3 x jar and 1 x xml) - copy them to your additional library folder.
EDIT: UPDATED LIBRARY FILES IN POST #6 THAT WILL NOT RAISE AN EVENT IN B4A IF TWO CONSECUTIVE SCANS OF THE SAME QR CODE OCCURS
Some sample code:
The library:
QRCodeReaderView
Author: Github: David L\u00e1zaro, Wrapped by: Johan Schoeman
Version: 1
QRCodeReaderView
Events:
Note that a panel is the parent of the custom view but seeing that the original project extends Surface View it will punch a hole in the panel when the scanner starts.
Also note the permissions in the B4A project's manifest file (I know majority are redundant for this project).
You will have to handle consecutive / continuous scans of the same QR code within your B4A code.
Posting the following:
1. B4A project
2. B4A library files (3 x jar and 1 x xml) - copy them to your additional library folder.
EDIT: UPDATED LIBRARY FILES IN POST #6 THAT WILL NOT RAISE AN EVENT IN B4A IF TWO CONSECUTIVE SCANS OF THE SAME QR CODE OCCURS
Some sample code:
B4X:
Region Project Attributes
#ApplicationLabel: QRCodeReaderView
#VersionCode: 1
#VersionName:
'SupportedOrientations possible values: unspecified, landscape or portrait.
#SupportedOrientations: portrait
#CanInstallToExternalStorage: False
#End Region
#Region Activity Attributes
#FullScreen: False
#IncludeTitle: True
#End Region
Sub Process_Globals
'These global variables will be declared once when the application starts.
'These variables can be accessed from all modules.
End Sub
Sub Globals
'These global variables will be redeclared each time the activity is created.
'These variables can only be accessed from this module.
Private qrcrv As QRCodeReaderView
Private b1 As Button
Private b2 As Button
Private p1 As Panel
Private l1 As Label
End Sub
Sub Activity_Create(FirstTime As Boolean)
'Do not forget to load the layout file created with the visual designer. For example:
Activity.LoadLayout("main")
qrcrv.Visible = False
End Sub
Sub Activity_Resume
End Sub
Sub Activity_Pause (UserClosed As Boolean)
End Sub
Sub b1_Click
qrcrv.Visible = True
DoEvents
qrcrv.startScan
End Sub
Sub b2_Click
qrcrv.stopScan
DoEvents
qrcrv.Visible = False
End Sub
Sub qrcrv_result_found(retval As String)
Log("B4A: " & retval)
l1.Text = retval
End SubThe library:
QRCodeReaderView
Author: Github: David L\u00e1zaro, Wrapped by: Johan Schoeman
Version: 1
QRCodeReaderView
Events:
- result_found (retval As String)
- ba As BA
- BringToFront
- DesignerCreateView (base As PanelWrapper, lw As LabelWrapper, props As Map)
- Initialize (EventName As String)
- Invalidate
- Invalidate2 (arg0 As Rect)
- Invalidate3 (arg0 As Int, arg1 As Int, arg2 As Int, arg3 As Int)
- IsInitialized As Boolean
- RemoveView
- RequestFocus As Boolean
- SendToBack
- SetBackgroundImage (arg0 As Bitmap)
- SetColorAnimated (arg0 As Int, arg1 As Int, arg2 As Int)
- SetLayout (arg0 As Int, arg1 As Int, arg2 As Int, arg3 As Int)
- SetLayoutAnimated (arg0 As Int, arg1 As Int, arg2 As Int, arg3 As Int, arg4 As Int)
- SetVisibleAnimated (arg0 As Int, arg1 As Boolean)
- startScan
- stopScan
- Background As Drawable
- Color As Int [write only]
- Enabled As Boolean
- Height As Int
- Left As Int
- Tag As Object
- Top As Int
- Visible As Boolean
- Width As Int
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