相关疑难解决方法(0)

我正在尝试访问Yelp API.我已经获得了我的钥匙,并阅读了大约40篇文章,解释了我需要做什么,我已经尝试了一切.关键和什么不是有效的.我得到以下内容:

05-16 17:39:54.955: E/AndroidRuntime(538): java.lang.NoClassDefFoundError: oauth.signpost.commonshttp.CommonsHttpOAuthConsumer

我导入了commons-codec-1.6 jar,signpost-commonshttp4-1.2.1.2.jar和signpost-core-1.2.1.2.jar.

我仍然收到错误消息.有帮助吗？

import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import oauth.signpost.OAuth;
import oauth.signpost.OAuthConsumer;
import oauth.signpost.commonshttp.CommonsHttpOAuthConsumer;
import oauth.signpost.exception.OAuthCommunicationException;
import oauth.signpost.exception.OAuthExpectationFailedException;
import oauth.signpost.exception.OAuthMessageSignerException;


/**
 * Example for accessing the Yelp API.
 */
public class Yelp {
  private String consumerKey = "";
  private String consumerSecret = "";
  private String token = "";
  private String tokenSecret = "";

  /**
   * Search with term and location.
   *
   * @param term Search term
   * @param latitude Latitude …