Android Twitter登录按钮不起作用

我正在编写一个包含使用twitter按钮登录的应用程序.按钮没问题.它在屏幕上显示,当我点击我给auth但我不能将令牌和秘密保存到字符串变量.我的意思是它总是空着的.
下面的代码是由fabric.io自动创建的,我在其中添加了一些东西,但它不起作用.没有错误它只是不改变变量令牌和秘密.我已经通过TextView对象尝试了这一点,该对象在成功案例中发生变化并且永远不会改变.
我该怎么办？
我只想保存令牌和秘密以获取用户的信息.

loginButton = (TwitterLoginButton) findViewById(R.id.twitter_login_button);
    loginButton.setCallBACk(new CallBACk<TwitterSession>() {
        @Override
        public void success(Result<TwitterSession> result) {
            System.out.println("Okay we are logged in Now!");

            TwitterSession session = Twitter.getSessionManager().getActiveSession();
            TwitterAuthToken authToken = session.getAuthToken();
            token = authToken.token;
            secret = authToken.secret;
            String answers = "";
            User user = new User(userid,token,secret,answers);
            registerUser(user);
            twitterauth = true;
        }

        @Override
        public void failure(TwitterException exception) {
            // Do something on failure
        }
    });

编辑：
如果我再次点击使用Twitter按钮登录,我会收到如下错误：

2660-2660/com.website.nameofmyapp E/Twitter﹕ Authorization completed with an error
com.twitter.sdk.android.core.TwitterAuthException: Authorize Failed.
        at com.twitter.sdk.android.core.identity.TwitterAuthClient.handleAuthorize(TwitterAuthClient.java:110)
        at com.twitter.sdk.android.core.identity.TwitterAuthClient.authorize(TwitterAuthClient.java:101)
        at com.twitter.sdk.android.core.identity.TwitterLoginButton$LoginClicklistener.onClick(TwitterLoginButton.java:161)
        at android.view.View.performClick(View.java:5184)
        at android.view.View$PerformClick.run(View.java:20910)
        at android.os.Handler.handleCallBACk(Handler.java:739)
        at android.os.Handler.dispatchmessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:145)
        at android.app.ActivityThread.main(ActivityThread.java:5942)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)

当“成功”自动发生时,我想要做的就是开始一项新活动.

TwitterAuthConfig authConfig = new TwitterAuthConfig(TWITTER_KEY,TWITTER_SECRET);
    Fabric.with(this,new Twitter(authConfig));

@Override
protected void onActivityResult(int requestCode,int resultCode,Intent data) {
    super.onActivityResult(requestCode,resultCode,data);
    FragmentManager fragment = getSupportFragmentManager();
    if (fragment != null) {
        fragment.findFragmentByTag("TwitterLogin").onActivityResult(requestCode,data);
    }
    else Log.d("Twitter","fragment is null");
}

@Override
public void onActivityResult(int requestCode,data);
    loginButton.onActivityResult(requestCode,data);
}