logging into youtube from android -

I am trying to log in to you using the following code

  MService = new YouTubeService ("nothing", developer_key); // Try the authentication {mService.setUserCredentials (mUsername, mPassword); } Hold (authentication exception e) {log. V (tag, e.trustin ()); }  

But I'm getting:
Connect youtube: com.google.gdata.util.AuthenticationException: Error connecting to login URI

This code looks very basic to me and I am not able to understand what I am doing wrong here.

Make sure you have to follow the permissions:

• android Android.permission.GET_ACCOUNTS
• android.permission.USE_CREDENTIALS
• android.permission.MANAGE_ACCOUNTS