该方法是未定义的类型HttpUtil

Question

我是新的android编程，我一直在休耕教程，以获得我的应用程序中的实时推送饲料。我一直得到的下游错误“的方法getHttpResponse（HttpGet）是由类型HttpUtil”我的String twitterTweets = httpUtil.getHttpResponse(httpGet)和httpPost.setEntity(new StringEntity("grant_type=client_credentials")); 未定义任何帮助，将不胜感激谢谢。

我的代码休耕

package com.javapapers.social.twitter; 

import android.util.Base64; 

import com.google.gson.Gson; 
import com.google.gson.reflect.TypeToken; 
import com.javapapers.java.io.HttpUtil; 

import org.apache.http.client.methods.HttpGet; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.entity.StringEntity; 

import java.io.UnsupportedEncodingException; 
import java.net.URLEncoder; 
import java.util.ArrayList; 

public class TwitterAPI { 

    private String twitterApiKey; 
    private String twitterAPISecret; 
    final static String TWITTER_TOKEN_URL = "https://api.twitter.com/oauth2/token"; 
    final static String TWITTER_STREAM_URL = "https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name="; 

    public TwitterAPI(String twitterAPIKey, String twitterApiSecret){ 
     this.twitterApiKey = twitterAPIKey; 
     this.twitterAPISecret = twitterApiSecret; 
    } 

    public ArrayList<TwitterTweet> getTwitterTweets(String screenName) { 
     ArrayList<TwitterTweet> twitterTweetArrayList = null; 
     try { 
      String twitterUrlApiKey = URLEncoder.encode(twitterApiKey, "UTF-8"); 
      String twitterUrlApiSecret = URLEncoder.encode(twitterAPISecret, "UTF-8"); 
      String twitterKeySecret = twitterUrlApiKey + ":" + twitterUrlApiSecret; 
      String twitterKeyBase64 = Base64.encodeToString(twitterKeySecret.getBytes(), Base64.NO_WRAP); 
      TwitterAuthToken twitterAuthToken = getTwitterAuthToken(twitterKeyBase64); 
      twitterTweetArrayList = getTwitterTweets(screenName, twitterAuthToken); 
     } catch (UnsupportedEncodingException ex) { 
     } catch (IllegalStateException ex1) { 
     } 
     return twitterTweetArrayList; 
    } 

    public ArrayList<TwitterTweet> getTwitterTweets(String screenName, 
                TwitterAuthToken twitterAuthToken) { 
     ArrayList<TwitterTweet> twitterTweetArrayList = null; 
     if (twitterAuthToken != null && twitterAuthToken.token_type.equals("bearer")) { 
      HttpGet httpGet = new HttpGet(TWITTER_STREAM_URL + screenName); 
      httpGet.setHeader("Authorization", "Bearer " + twitterAuthToken.access_token); 
      httpGet.setHeader("Content-Type", "application/json"); 
      HttpUtil httpUtil = new HttpUtil(); 
      String twitterTweets = httpUtil.getHttpResponse(httpGet); 
      twitterTweetArrayList = convertJsonToTwitterTweet(twitterTweets); 
     } 
     return twitterTweetArrayList; 
    } 

    public TwitterAuthToken getTwitterAuthToken(String twitterKeyBase64) throws UnsupportedEncodingException { 
     HttpPost httpPost = new HttpPost(TWITTER_TOKEN_URL); 
     httpPost.setHeader("Authorization", "Basic " + twitterKeyBase64); 
     httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8"); 
     httpPost.setEntity(new StringEntity("grant_type=client_credentials")); 
     HttpUtil httpUtil = new HttpUtil(); 
     String twitterJsonResponse = httpUtil.getHttpResponse(httpPost); 
     return convertJsonToTwitterAuthToken(twitterJsonResponse); 
    } 

    private TwitterAuthToken convertJsonToTwitterAuthToken(String jsonAuth) { 
     TwitterAuthToken twitterAuthToken = null; 
     if (jsonAuth != null && jsonAuth.length() > 0) { 
      try { 
       Gson gson = new Gson(); 
       twitterAuthToken = gson.fromJson(jsonAuth, TwitterAuthToken.class); 
      } catch (IllegalStateException ex) { } 
     } 
     return twitterAuthToken; 
    } 

    private ArrayList<TwitterTweet> convertJsonToTwitterTweet(String twitterTweets) { 
     ArrayList<TwitterTweet> twitterTweetArrayList = null; 
     if (twitterTweets != null && twitterTweets.length() > 0) { 
      try { 
       Gson gson = new Gson(); 
       twitterTweetArrayList = 
         gson.fromJson(twitterTweets, new TypeToken<ArrayList<TwitterTweet>>(){}.getType()); 
      } catch (IllegalStateException e) { 
      } 
     } 
     return twitterTweetArrayList; 
    } 
    private class TwitterAuthToken { 
     String token_type; 
     String access_token; 
    } 
} 

Answer 1

我假定你是下面这个教程（http://javapapers.com/android/android-twitter-feed-reader/）。 向下滚动以查找HttpUtil的源代码。