由网友(磉愁)分享简介：我想获得Twitter的追随者用户列表为什么我用下面的code，但让空指针在的（用户用户：追随者），看到这个链接http://grep$c$c.com/file/repo1.maven.org/maven2/org.twitter4j/twitter4j-examples/2.2.4/twitter4j/example...

我想获得Twitter的追随者用户列表为什么我用下面的code，但让空指针在的（用户用户：追随者），看到这个链接http://grep$c$c.com/file/repo1.maven.org/maven2/org.twitter4j/twitter4j-examples/2.2.4/twitter4j/examples/list/GetAllUserLists.java在这里，他们引导到如何让用户在Java中，但 ResponseList＆LT;在UserList＆GT;名单= twitter.getAllUserLists（参数[0]）; 在这个环节是什么ARG [0]为每个方法的 http://twitter4j.org/ja/javadoc/twitter4j/api/ListMethods.html 请指导我解决我的问题。

 私有静态最后弦乐用户=您的用户;
 私有静态最后弦乐PW =你的密码;


    //做一个Twitter的对象
           叽叽喳喳叽叽喳喳=新TwitterFactory（）的getInstance（用户，PW）。

    //设置我的状态
    twitter.setStatus（@ vogella与Twitter在Java中搞乱）;

    清单＆lt;使用者＆GT;追随者= twitter.getFollowers（）;
    对于（用户用户：追随者）{
        的System.out.println（user.getName（））;
    }
}
 

解决方案

按我的知识，Twiiter已经更新了他们的API，现在他们支持的OAuth 2.0的机制来获取任何信息。

要检索的追随者LIS，你应该使用下面的链接 https://dev.twitter.com/docs/api/1/get /追随者/ IDS 您可以使用Twitter4j库的Java / Android的 http://twitter4j.org/en/index.html

 私人无效twitter_req（）
{

        字符串access_token = prefs.getString（twitter_token，NULL）;
        字符串access_secret = prefs.getString（twitter_secret，NULL）;

              twitter_api拉皮=新twitter_api（access_token，access_secret，新GetUserInfo_TWRequestCallback（））;
                lapi.get（api.twitter.com/1/followers/ids.json）;

}
公共无效的get（）{
        尝试 {
                HTTPGET HTT prequest =新HTTPGET（mUrl）;
                符号（HTT prequest）;
                sendSync（HTT prequest）;
        }赶上（例外五）{
                Log.d（获得（），e.toString（））;
                doFailCallback（）;
        }
}
私人无效sendSync（Htt的prequestBase HTT prequest）
{

            HttpClient的HttpClient的=新DefaultHttpClient（）;
            HTT presponse HTT presponse = httpClient.execute（HTT prequest）;
            状态行状态行= HTT presponse.getStatusLine（）;
            HttpEntity实体= HTT presponse.getEntity（）;
            //

            //
            响应=空;
            如果（实体！= NULL）{
                响应= getResponseFromStream（entity.getContent（））; //
            }
}
公共无效标志（Htt的prequestBase HTT prequest）抛出OAuthMessageSignerException，OAuthExpectationFailedException {
       // MSOAuth的OAuth = MSOAuth.init（mSession）;
       // oauth.sign（HTT prequest）;
         尝试 {
        consumer.sign（HTT prequest）;
        }赶上（OAuthCommunicationException E）{
            响应=errorsign;
            如果（E！= NULL）
                如果（e.getMessage（）！= NULL）
                {
                    响应= e.getMessage（）;
                }
            // TODO自动生成的catch块
            e.printStackTrace（）;
        }
}
 

i want to obtain twitter follower user list that why i am using following code but giving NullPointer on for (User user : followers) and see this link http://grepcode.com/file/repo1.maven.org/maven2/org.twitter4j/twitter4j-examples/2.2.4/twitter4j/examples/list/GetAllUserLists.java here they guided to how to get Users in Java but ResponseList<UserList> lists = twitter.getAllUserLists(args[0]); in this link what is arg[0] as per method http://twitter4j.org/ja/javadoc/twitter4j/api/ListMethods.html please guide me to solve my problem.

 private static final String user ="your-user";
 private static final String pw ="your-password";


    // Make a Twitter object
           Twitter twitter = new TwitterFactory().getInstance(user,pw);

    // Set my status
    twitter.setStatus("@vogella messing with Twitter in Java");

    List<User> followers = twitter.getFollowers();
    for (User user : followers) {
        System.out.println(user.getName());
    }
}

解决方案

As per my knowledge, Twiiter has updated their apis, now they are supporting oauth 2.0 mechanism to retrieve any info.

To retrieve followers lis you should use below link https://dev.twitter.com/docs/api/1/get/followers/ids you can use Twitter4j library for java/android http://twitter4j.org/en/index.html

private void twitter_req()
{

        String access_token = prefs.getString("twitter_token", null);
        String access_secret = prefs.getString("twitter_secret", null);

              twitter_api lapi=new twitter_api(access_token,access_secret,new GetUserInfo_TWRequestCallback());
                lapi.get("api.twitter.com/1/followers/ids.json ");

}
public void get() {
        try {
                HttpGet httpRequest = new HttpGet(mUrl);
                sign(httpRequest);
                sendSync(httpRequest);
        } catch(Exception e) {
                Log.d(" get()", e.toString());
                doFailCallback();
        }
}
private void sendSync(HttpRequestBase httpRequest)
{

            HttpClient httpClient = new DefaultHttpClient();
            HttpResponse httpResponse = httpClient.execute(httpRequest);
            StatusLine statusLine = httpResponse.getStatusLine();
            HttpEntity entity = httpResponse.getEntity();
            //

            //
            response = "null";
            if (entity != null) {
                response = getResponseFromStream(entity.getContent());  //
            }
}
public void sign(HttpRequestBase httpRequest) throws OAuthMessageSignerException, OAuthExpectationFailedException {
       // MSOAuth oauth = MSOAuth.init(mSession);
       // oauth.sign(httpRequest);
         try {
        consumer.sign(httpRequest);
        } catch (OAuthCommunicationException e) {
            response="errorsign";
            if(e!=null)
                if(e.getMessage()!=null)
                {
                    response=e.getMessage();
                }
            // TODO Auto-generated catch block
            e.printStackTrace();
        }  
}