Android：如何从网站上下载数据并流式传输到listview

Question

我正在尝试构建一个从Wunderground.com中提取数据的应用程序，并使用ListView将数据流式传输到Android应用程序中。我的合作伙伴和我已经成功地使ListView工作，但是从Wunderground流式传输数据会导致一些问题。

奇怪的是，如果我拉取获取数据的代码并将其粘贴到eclipse中，它就可以工作（偶尔会这样）。我在网上寻找解决方案，但似乎找不到任何有用的东西。我们正在尝试下拉以下天气数据：湿度，温度，条件，日期时间以及与数据相关的图像。

以下是代码：

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        try {

            String sURL = "http://freegeoip.net/json/";
            URL url = new URL(sURL);//Create a URL object

            //Connect to the website with the url variable
            HttpURLConnection request = (HttpURLConnection) url.openConnection();
            request.connect();

            JsonParser jp = new JsonParser();//Create an object from the JsonParser class

            JsonElement root = jp.parse(new BufferedReader(new InputStreamReader((InputStream) request.getContent())));

            JsonObject rootobj = root.getAsJsonObject();//create an object for the element
            String ZipCode = rootobj.get("zip_code").getAsString();


            //Create a string for the web address with the key
            String sURL1 = "http://api.wunderground.com/api/1e404159ad02dddd/conditions/hourly/q/" + ZipCode + ".json";

            URL url1 = new URL(sURL1);//Create a URL object
            //Connect to the website with the url variable
            HttpURLConnection request1 = (HttpURLConnection) url1.openConnection();
            request1.connect();

            JsonParser jp1 = new JsonParser();//Create an object from the JsonParser class
            JsonElement root1 = jp1.parse(new InputStreamReader((InputStream) request1.getContent()));

            JsonObject rootobj1 = root1.getAsJsonObject();//create an object for the element
            JsonArray printArray = rootobj1.get("hourly_forecast").getAsJsonArray();

            //Add all Wunderground data to the List
            for(int i = 0; i < printArray.size(); i++)
            {
                String dateTime = rootobj1.get("hourly_forecast").getAsJsonArray().get(i).getAsJsonObject().get("FCTTIME").getAsJsonObject().get("pretty").getAsString();
                String condition = rootobj1.get("hourly_forecast").getAsJsonArray().get(i).getAsJsonObject().get("condition").getAsString();
                String temp = rootobj1.get("hourly_forecast").getAsJsonArray().get(i).getAsJsonObject().get("temp").getAsJsonObject().get("english").getAsString();
                String humidity = rootobj1.get("hourly_forecast").getAsJsonArray().get(i).getAsJsonObject().get("humidity").getAsString();
                String image = rootobj1.get("hourly_forecast").getAsJsonArray().get(i).getAsJsonObject().get("icon_url").getAsString();


                itemName[i] = "The date is " + dateTime + ". It is " + condition + " outside. It is " + temp + " degrees outside. The humidity is at " + humidity + " percent.";
            }
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }

感谢任何帮助。谢谢。