Android: LinkedIn OAuth Callback not Working

I'm using LinkedIn OAuth in my Android app. I've an LinkedIn application, consumer key and secret already, an as a result I can request succesfully.

Everything is fine until callback. The web page not calling back, I mean onNewIntent or onResume methods not calling. Web page only shows callback url with parameters. I mean it looks like:

callback_url://?oauth_token=324sdf&oath_verifier=as21dsf

Here is my all code:

try {
    consumer = new CommonsHttpOAuthConsumer("ConsumerKey", "ConsumerSecret");
provider = new CommonsHttpOAuthProvider("https://api.linkedin.com/uas/oauth/requestToken", "https://api.linkedin.com/uas/oauth/accessToken", "https://api.linkedin.com/uas/oauth/authorize");
    final String url = provider.retrieveRequestToken(consumer, Constants.OAUTH_CALLBACK_URL);
    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)).setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_FROM_BACKGROUND);
    startActivity(intent);                          
} catch (Exception e) {
    e.printStackTrace();
}

Activity is already defined as singleInstance in Manifest.

What's wrong or missing?