title: Twitter4J Failed request token
body: <p>Hi i'm using <a href="http://www.londatiga.net/it/how-to-post-twitter-status-from-android/comment-page-2/" rel="nofollow">this tutorial</a></p>
  
  <p>for my twitter test project and i already change :</p>
  
  <p>from</p>
  
  <blockquote>
    <p>mHttpOauthprovider = new DefaultOAuthProvider("<a href="http://twitter.com/oauth/request_token" rel="nofollow">http://twitter.com/oauth/request_token</a>", "<a href="http://twitter.com/oauth/access_token" rel="nofollow">http://twitter.com/oauth/access_token</a>", "<a href="http://twitter.com/oauth/authorize" rel="nofollow">http://twitter.com/oauth/authorize</a>"); </p>
  </blockquote>
  
  <p>to</p>
  
  <blockquote>
    <p>mHttpOauthprovider = new DefaultOAuthProvider("<a href="https://api.twitter.com/oauth/request_token" rel="nofollow">https://api.twitter.com/oauth/request_token</a>", "<a href="https://api.twitter.com/oauth/access_token" rel="nofollow">https://api.twitter.com/oauth/access_token</a>","<a href="https://api.twitter.com/oauth/authorize" rel="nofollow">https://api.twitter.com/oauth/authorize</a>");</p>
  </blockquote>
  
  <p>my problem is, when my apps in <a href="https://dev.twitter.com/apps/" rel="nofollow">https://dev.twitter.com/apps/</a>, if i didn't fill Callback URL in that edittext, I will get error :</p>
  
  <blockquote>
    <p>05-08 11:47:08.070: W/System.err(20424): oauth.signpost.exception.OAuthCommunicationException: Communication with the service provider failed: <a href="https://api.twitter.com/oauth/request_token" rel="nofollow">https://api.twitter.com/oauth/request_token</a>
    05-08 11:47:08.070: W/System.err(20424):     at oauth.signpost.AbstractOAuthProvider.retrieveToken(AbstractOAuthProvider.java:214)
    05-08 11:47:08.070: W/System.err(20424):     at oauth.signpost.AbstractOAuthProvider.retrieveRequestToken(AbstractOAuthProvider.java:69)
    05-08 11:47:08.070: W/System.err(20424):     at sg.tv.SocialGate.TwitterCore.TwitterApp$2.run(TwitterApp.java:152)
    05-08 11:47:08.070: W/System.err(20424): Caused by: java.io.FileNotFoundException: <a href="https://api.twitter.com/oauth/request_token" rel="nofollow">https://api.twitter.com/oauth/request_token</a>
    05-08 11:47:08.075: W/System.err(20424):     at libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:177)
    05-08 11:47:08.075: W/System.err(20424):     at libcore.net.http.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:271)
    05-08 11:47:08.075: W/System.err(20424):     at oauth.signpost.basic.HttpURLConnectionResponseAdapter.getContent(HttpURLConnectionResponseAdapter.java:18)
    05-08 11:47:08.075: W/System.err(20424):     at oauth.signpost.AbstractOAuthProvider.handleUnexpectedResponse(AbstractOAuthProvider.java:228)
    05-08 11:47:08.080: W/System.err(20424):     at oauth.signpost.AbstractOAuthProvider.retrieveToken(AbstractOAuthProvider.java:189)
    05-08 11:47:08.080: W/System.err(20424):     ... 2 more</p>
  </blockquote>
  
  <p>but when I fill that Callback URL I didnt get any issue. But I want to left that Callback URL edittext blank, how to solve that issue? thank you </p>