我正在使用Twitter4J库进行OAuth认证，但在打开Twitter登录页面之前就遇到了“Authentication Challenge is Null Exception”的问题。
以下是代码。
以下是代码。
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.
}
异常：
E/Home (4393): 收到身份验证挑战为空 E/Home (4393): 收到身份验证挑战为null。相关讨论可以在以下网址找到：E/Home (4393): http://www.google.co.jp/search?q=6c607809或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): 引起的原因： E/Home (4393): 接收到身份验证挑战为空的IOException 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它包含以下链接，但Google上没有太多相关信息。