如何在Android中将URL内容解析为字符串

Question

I have a valid URL, but I cannot parse its content to a string like I do in normal Java. I am pretty new to android. Mostly I convert my normal Java code to android Java and this code works perfectly in Java NetBeans but not in Android Studio.

PSThere are no errors or even warnings given by compiler / during run-time. It just doesn't work and when I check the String length for "weather" its 0.

String weather="";
            try {
                weather = new Scanner(new URL("http://api.openweathermap.org/data/2.5/forecast?lat="+lat+"&lon="+longi+"&units=metric&mode=xml").openStream(), "UTF-8").useDelimiter("\\A").next();
            } catch (Exception e) {

            }

Answer 1

You can use Jsoup. Look at its " cookbook " for tutorials and more information but here is a simple example:

    String WeatherString; //Declare earlier in code - Before "onCreate" method.
@Override
        protected Void doInBackground(Void... unused) {
            org.jsoup.nodes.Document doc = null;
            try {
                doc = Jsoup.connect("http://api.openweathermap.org/data/2.5/forecast").get();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace(); 
        }

            WeatherString = doc.select("dl#weather dt + dd + dt + dd ").first().text(); //Input here where the xml code is that you want to parse to a string

            return null;        
        }

This code is inside of an AsyncTask . Hope this helps. And, again, refer to the "cookbook" on the Jsoup website for more info.