Save a picture of a signature to a file in Rhodes on Android

I am trying to implement signature capture using Rhodes targeting an Android tab. I have managed to get the canvas and scribble on it. But am unable to save the signature at a desired location. The signature_uri takes the default location as db/db-files/Image-XXXXXX.png.

This was the code in the sample example:

def signature_callback
if @params['status'] == 'ok'
  #create signature record in the DB
  signature = SignatureUtil.new({'signature_uri'=>@params['signature_uri']})
  signature.save
  puts "new Signature object: " + signature.inspect
end

In the console I got:

APP| RHO serve: /app/Settings/signature_callback
I/APP     (  801): I 01/26/2012 11:36:20:236 0000032e                  APP| Params: {"status"=>"ok", "signature_uri"=>"db/db-files/Image_20120126113618375.png", "rho_callback"=>"1"}
I/APP     (  801): I 01/26/2012 11:36:20:238 0000032e                  APP| *******************ok****************
I/APP     (  801): I 01/26/2012 11:36:20:238 0000032e                  APP| %%%%%%%%%%%%%%%%%db/db-files/Image_20120126113618375.png%%%%%%%%%%%
I/APP     (  801): I 01/26/2012 11:36:20:239 0000032e                  APP| App error: can't convert Symbol into Integer
I/APP     (  801):  lib/rhom/rhom_object_factory.rb:67:in `[]'
I/APP     (  801): lib/rhom/rhom_object_factory.rb:67:in `initialize'
I/APP     (  801): apps/app/Settings/controller.rb:34:in `new'
I/APP     (  801): apps/app/Settings/controller.rb:34:in `signature_callback'
I/APP     (  801): lib/rho/rhocontroller.rb:91:in `serve'
I/APP     (  801): lib/rho/rhoapplication.rb:209:in `serve'
I/APP     (  801): lib/rho/rho.rb:822:in `serve'
I/APP     (  801): E 01/26/2012 11:36:20:248 00000321                  Net| Request failed. HTTP Code: 500 returned. HTTP Response:         <html>
I/APP     (  801):             <head>
I/APP     (  801):                 <meta name="viewport" content="width=320"/>
I/APP     (  801):             </head>
I/APP     (  801):             <body>
I/APP     (  801):                 <h2>Server Error</h2>
I/APP     (  801):                 <p>
I/APP     (  801): Error: can't convert Symbol into Integer<br/>Trace: <br/

Now instead of this database storage, I want to save it in a desired location. Please share your views.

have you checked out this page: http://docs.rhomobile.com/rhodes/device-caps#file-system-access ? It looks to me like you need to save the image to the DB and use the Rho::RhoApplication::get_blob_path(image.image_uri) method to open the file. Then you should be able to use the file system API to create a new file and write the contents of the image to it wherever you choose.

Just try to pass sd card location in signature uri. Please note to give permission of read write for sd card in manifest.

Else

Copy the signature file to desire location from internal package but this is duplicacy of work.

Save a picture of a signature to a file in Rhodes on Android

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