Android Question How to Save a Signature Capture with only the points of the signature

[Lyndon Bermoy]

Hi.

I just wondering how to capture the points of the electronic signature capture posted by tutorial of @Erel in this link https://www.b4x.com/android/forum/threads/signature-capture-tutorial.9096/

I want only to capture the points of the signature, not the image. and will be save in the database.

Please i really need help to do that..

 

[DonManfred]

Look at the SignPad Library in similar thread-list...

 

[Lyndon Bermoy]

Look at the SignPad Library in similar thread-list...

thanks sir but it is the same with having saved as an image. I wanted to store the signature in the database as a points, and will restore with the assigned points in the stored signature. How to do this sir?

 

[DonManfred]

But you have an transparent image. Just scan the pixels of this bitmap. Only the pixels from the signature have a color... All others are transparent

You can easily print this transparent image on an document for example...

 

[klaus]

You could add two lists one for each coordinate and memorize the points in these lists in the Panel_Touch routine in the SignatureCapture module.

 

[Reviewnow]

it would be best to just base64 encode the image and store the encoded string in your database you could then decode and display it later

'Add StringUtils Library
  
  Dim signatureCaptured() As Byte
  signatureCaptured = SignatureCapture.GetAsByteArray2(SD, 90, "PNG")
  
  Dim MyEncodedImage as String
  
  MyEncodedImage = su.EncodeBase64(signatureCaptured)  '' Reference String utils
  'Save  MyEncodedImage

'Add the following code to your signaturecapture class
Sub GetAsByteArray2(objSignatureData As SignatureData, quality As Int,  format As String ) As Byte()
   Dim out As OutputStream
   out.InitializeToBytesArray(0)
   objSignatureData.Canvas.Bitmap.WriteToStream(out,quality,format)
   out.Close
   Return out.ToBytesArray()
End Sub