How can I retrieve Viewers ID?

[HOOZ]

I am writing an application for mobile phones with java. This program
will be downloaded and installed to the device.
I wanna use 2-legged OAuth, so how can I retrieve VIEWER ID? In order
to connect and reach to see the friend list of the user wants to
login, I need the VIEWER ID of that user.

Here is an example:

c.setProperty(OpenSocialClient.Property.CONSUMER_SECRET,
"uynAeXiWTisflWX99KU1D2q5");
c.setProperty(OpenSocialClient.Property.CONSUMER_KEY, "orkut.com:
623061448914");
c.setProperty(OpenSocialClient.Property.VIEWER_ID,
"03067092798963641994");

In this example the VIEWER ID is already known before, but
how?? ..with doing some magic after the user enters his nickname and
password of his orkut account??

Sincerely,

Hamdi

[Jesse]

Typically this would be passed to you via the container that renders the app.

Since you are living completely outside the container this might be a case where you need to use 3 leggedOAuth. The idea is that you do NOT have the user enter their info for these social networks on your site but via the method provided by the containers. With 3 legged once a user has linked your app, you will be sent back a request token which can be used for all transactions.

Jesse