B4X Requires Chilkat v11.7.0+

Create a vCard (Contact) QR Code

See more QR Code Examples

Demonstrates a QR code that adds a contact to a phone when scanned. The text is a vCard, the standard format for contact details: lines between BEGIN:VCARD and END:VCARD, each ending with CRLF. A vCard is fairly long, so the symbol is larger than one holding a web address. Leave out the fields that are not needed to keep it small. B4X

Dim success As Boolean = False

'  This example requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  The second argument of AppendLine is cktrue to end each line with CRLF.
Dim sbCard As ChilkatStringBuilder
sbCard.Initialize
sbCard.AppendLine("BEGIN:VCARD", True)
sbCard.AppendLine("VERSION:3.0", True)
sbCard.AppendLine("N:Smith;Alex;;;", True)
sbCard.AppendLine("FN:Alex Smith", True)
sbCard.AppendLine("ORG:Example Company", True)
sbCard.AppendLine("TITLE:Sales Manager", True)
sbCard.AppendLine("TEL;TYPE=CELL:+1-555-0100", True)
sbCard.AppendLine("EMAIL:alex.smith@example.com", True)
sbCard.AppendLine("URL:https://www.example.com", True)
sbCard.AppendLine("END:VCARD", True)

Dim json As ChilkatJsonObject
json.Initialize
json.UpdateSb("payload.text", sbCard)
json.UpdateInt("render.moduleSize", 6)
json.UpdateString("output.path", "qa_output/qr_vcard.png")
json.UpdateBool("output.overwrite", True)
json.UpdateString("output.return", "none")

Dim fmt As ChilkatFormats
fmt.Initialize
Dim jsonOut As ChilkatJsonObject
jsonOut.Initialize
success = fmt.QrCode("generate", json, jsonOut)
If success = False Then
    Log(fmt.LastErrorText)
    Return
End If


Log("vCard length: " & sbCard.Length)
Log("QR version: " & jsonOut.IntOf("symbols[0].selectedEncoding.version"))
Log("modules: " & jsonOut.IntOf("symbols[0].dimensions.modulesWide") & " x " & jsonOut.IntOf("symbols[0].dimensions.modulesHigh"))
Log("image: " & jsonOut.IntOf("outputs[0].width") & " x " & jsonOut.IntOf("outputs[0].height") & " pixels")

'  The image written to qa_output/qr_vcard.png:

'  

'  Sample output:

'  vCard length: 197
'  QR version: 10
'  modules: 57 x 57
'  image: 390 x 390 pixels