Twitter4J + Android: Authentication Challenge is Null Exception

I'm using Twitter4J library for OAuth authentication but I get "Authentication Challenge is Null Exception" even before It opens the Twitter login page.

Here is the code.

    Twitter twitter = new TwitterFactory().getInstance();
    try
    {

        twitter.setOAuthConsumer(Startup.TWITTER_KEY, Startup.TWITTER_SECRET);

        String callbackURL = "twitter-client:///";

        RequestToken rToken = twitter.getOAuthRequestToken(callbackURL);

        startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(rToken.getAuthenticationURL())));

    }
    catch(IllegalStateException e)
    {
    // access token is already available, or consumer key/secret is not set.
        if(!twitter.getAuthorization().isEnabled()){
            System.out.println("OAuth consumer key/secret is not set.");
            System.exit(-1);
        }
    }
    catch(Exception e)
    {
        Toast.makeText(Home.this, "Network Host not responding: "+e.getMessage(),Toast.LENGTH_SHORT).show();  //This exception. 
    }

Exception:

E/Home ( 4393): Received authentication challenge is null E/Home ( 4393): Received authentication challenge is nullRelevant discussions can be on the Internet at: E/Home ( 4393): http://www.google.co.jp/search?q=6c607809 or E/Home ( 4393): http://www.google.co.jp/search?q=0f1d8134 E/Home ( 4393): TwitterException{exceptionCode=[6c607809-0f1d8134 cab4c0ac-d492a113], statusCode=-1, retryAfter=0, rateLimitStatus=null, version=2.2.2} E/Home ( 4393): at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:204) E/Home ( 4393): at twitter4j.internal.http.HttpClientWrapper.request(HttpClientWrapper.java:65) E/Home ( 4393): at twitter4j.internal.http.HttpClientWrapper.post(HttpClientWrapper.java:102) E/Home ( 4393): at twitter4j.auth.OAuthAuthorization.getOAuthRequestToken(OAuthAuthorization.java:108) E/Home ( 4393): at twitter4j.TwitterBaseImpl.getOAuthRequestToken(TwitterBaseImpl.java:271) E/Home ( 4393): at com.sharj.trafik.view.Home.askOAuth(Home.java:157) E/Home ( 4393): at com.sharj.trafik.view.Home.access$0(Home.java:143) E/Home ( 4393): at com.sharj.trafik.view.Home$3.onClick(Home.java:110) E/Home ( 4393): at android.view.View.performClick(View.java:2485) E/Home ( 4393): at android.view.View$PerformClick.run(View.java:9080) E/Home ( 4393): at android.os.Handler.handleCallback(Handler.java:587) E/Home ( 4393): at android.os.Handler.dispatchMessage(Handler.java:92) E/Home ( 4393): at android.os.Looper.loop(Looper.java:130) E/Home ( 4393): at android.app.ActivityThread.main(ActivityThread.java:3683) E/Home ( 4393): at java.lang.reflect.Method.invokeNative(Native Method) E/Home ( 4393): at java.lang.reflect.Method.invoke(Method.java:507) E/Home ( 4393): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) E/Home ( 4393): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) E/Home ( 4393): at dalvik.system.NativeStart.main(Native Method) E/Home ( 4393): Caused by: java.io.IOException: Received authentication challenge is null E/Home ( 4393): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.processAuthHeader(HttpURLConnectionImpl.java:1153) E/Home ( 4393): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.processResponseHeaders(HttpURLConnectionImpl.java:1095) E/Home ( 4393): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.retrieveResponse(HttpURLConnectionImpl.java:1048) E/Home ( 4393): at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:726) E/Home ( 4393): at org.apache.harmony.luni.internal.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:121) E/Home ( 4393): at twitter4j.internal.http.HttpResponseImpl.(HttpResponseImpl.java:35) E/Home ( 4393): at twitter4j.internal.http.HttpClientImpl.request(HttpClientImpl.java:168) E/Home ( 4393): ... 18 more

It contains following links, but Google doesn't have much on this.

http://www.google.co.jp/search?q=6c607809

http://www.google.co.jp/search?q=0f1d8134

I had the same problem. It turned out that if the time stamp on the oAuth call is incorrect, the server returns a 401 status error which on Android devices causes the "Received authentication challenge is null" exception to be thrown. All of the devices that were having this problem had incorrect times, and fixing the times fixed the problem.

Perhaps this is your issue as well?

I also had the same problem. First I was getting it when doing getOAuthRequestToken(). My consumer key and consumer secret were coming from .properties file, and turned out they had a trailing space, so were seen as invalid by Twitter's API.

After that, I also was getting the same 401 when doing getOAuthAccessToken(). Here, I wasn't correctly persisting and re-constructing RequestToken object.

This happened for me when I called the following twice in a row:

 requestToken = twitter.getOAuthRequestToken();
    return requestToken.getAuthorizationURL();

FIXED: I had this exception even after I fixed the date&time but when I looked in logcat at the params that twittherj sent to server the timestamp was still wrong - so I force-closed the app and after that exception was gone.

Gaurav Vashisth

I too stumbled across this problem. Check my solution in another thread Android: Twitter4J Exception (Received Authentication Challenge Is Null)

Youssef El Hemali

I had same problem and fixed it by Using Asynchronous task as I answered in the following link Android Twitter exception error :(

来源：https://stackoverflow.com/questions/6129316/twitter4j-android-authentication-challenge-is-null-exception

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