post NOT predifined messages on facebook wall from android application

I'm trying to create an android application which would allow the users to post messages on their facebook wall and also on their friends wall. I've been through a few tutorials but in开发者_运维技巧 each of them is done barely the same thing:integrate facebook in application, the login authorization and posting a predifined message on the walll.

I'm using facebook sdk and I wonder is possible for the user to write directly to his wall in a dialog window??? What kind of authorization I need and if u could give me an example would be great.Thank u!

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Take a look at this tutorial here and there is part 2 here. It will guide you though setting up the application to use facebook. Once you have all that setup you can use a function like this to post a msg to someones wall:

/**
 * Post to a friends wall
 * @param msg Message to post
 * @param userId Id for friend to post to or null to post to users wall
 */
public void postToWall(String msg, String userID) {
    try {
        if (isSession()) {
            String response = mFacebook.request((userID == null) ? "me" : userID);
            Bundle parameters = new Bundle();
            parameters.putString("message", msg);
            response = mFacebook.request(((userID == null) ? "me" : userID) + "/feed", parameters, "POST");
            Log.d(TAG,response);
            if (response == null || response.equals("") || 
                    response.equals("false")) {
                Log.v("Error", "Blank response");
            }

        } else {
            // no logged in, so relogin
            Log.d(TAG, "sessionNOTValid, relogin");
            mFacebook.authorize(this, PERMS, new LoginDialogListener());
        }
    } catch(Exception e) {
        e.printStackTrace();
    }
}