Can't post in wall/logout from facebook in android

Question

At the oficial facebook developers tutorial, they say posting in users Wall on facebook is as easy as writing this single line:

mFacebook.dialog(context, "feed", new PostDialogListener());

but when I try to use this, it keeps asking me to create the PostDialogListener class. Isn't that included with facebook sdk? where can I find this class?

and, to logout, I must use this:

mAsyncRunner.logout(getContext(), new RequestListener() {
@Override
public void onComplete(String response, Object state) {}

@Override
public void onIOException(IOException e, Object state) {}

@Override
public void onFileNotFoundException(FileNotFoundException e,
    Object state) {}

@Override
public void onMalformedURLException(MalformedURLException e,
    Object state) {}

@Override
public void onFacebookError(FacebookError e, Object state) {}
});

And then I'm asked to create getContext() method.

Facebook's tutorial is very incomplete, what must I do now? Thanks!

Edit: My facebook activity is very simple, i just connect and retrieve data from user, then pass it to another activity. I wat to implement a logout method, and also ask user to post on wall after login (that would be in another activity)

public class FacebookConnectActivity extends Activity {
private static final String TAG_JSON = "json";
Facebook facebook = new Facebook("12121212112");
AsyncFacebookRunner mAsyncRunner;
private SharedPreferences mPrefs;
JSONObject json;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.resgatar_produto_layout);


    mPrefs = getPreferences(MODE_PRIVATE);
    String access_token = mPrefs.getString("access_token", null);
    long expires = mPrefs.getLong("access_expires", 0);
    if(access_token != null) {
        facebook.setAccessToken(access_token);
    }
    if(expires != 0) {
        facebook.setAccessExpires(expires);
    }

    if(!facebook.isSessionValid()) {

    facebook.authorize(this, new String[] {"email", "user_birthday",     "publish_actions"}, new DialogListener() {
        @Override
        public void onComplete(Bundle values) {}

        @Override
        public void onFacebookError(FacebookError error) {}

        @Override
        public void onError(DialogError e) {}

        @Override
        public void onCancel() {}   
    });

    }

}

public void logoutFB(){

}



@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    facebook.authorizeCallback(requestCode, resultCode, data);
    try{
        json = Util.parseJson(facebook.request("me"));
        Log.e("FacebookConnect", "JSON " + json.toString());
    }catch (JSONException e) {
        Log.e("FacebookConnect", "JSONException " + e.toString());
    }catch(FacebookError fbe){
        Log.e("FacebookConnect", "FacebookError " + fbe.toString());
    }catch (Exception e){
        Log.e("FacebookConnect", "Exception " + e.toString());
    }

    Intent a = new Intent(FacebookConnectActivity.this, FacebookDataProcess.class);
    a.putExtra(TAG_JSON, json.toString());
    startActivity(a);
    finish();
}   
}

Answer 1

I think I've just got something that works:

in FacebookConnectActivity:

public static  void logoutFB(){
    if(facebook.isSessionValid()){
        facebook.setAccessToken(null);
    }
}

This method is called in a logoutbutton.onclick just like this:

FacebookConnectActivity.logoutFB();

Maybe it helps someone.