Hi,

The Force.com REST API Developer Guide says this is how to download attachement content (on p. 40).

https://na1.salesforce.com/services/data/v20.0/sobjects/Attachment/001D000000INjVe/body -H "Authorization: Bearer token"

In my Android App I am getting an invalid session ID.  Any ideas?

I use the REST api to grab the "Body" of the attachmment so I have the URL for the BLOB,

bodyURL = records.getJSONObject(i).getString("Body").toString();

Then I create my URL

imageUrl=client.getClientInfo().instanceUrl+bodyURL+" -H "+'"'+"Authorization: Bearer "+client.getAuthToken()+'"';

Then I try and open the URL and stream it down to put into an ImageView.

URL networkUrl = imageUrl;

 try {

          InputStream in = networkUrl.openConnection().getInputStream(); 
          BufferedInputStream bis = new BufferedInputStream(in,1024*8);
          ByteArrayOutputStream out = new ByteArrayOutputStream();

          int len=0;
          byte[] buffer = new byte[1024];
          while((len = bis.read(buffer)) != -1){
              out.write(buffer, 0, len);
          }
          out.close();
          bis.close();

          data = Base64.decode(out.toByteArray(), Base64.DEFAULT);
          //data = out.toByteArray();
          networkBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
          
          
      }
      catch (IOException e) {
          e.printStackTrace();
      }
 
....

	    ImageView img = (ImageView) findViewById(R.id.imageViewStore);
	    img.setImageBitmap(networkBitmap);