MyTask网址解析

public class MyTask extends AsyncTask<String,Void,String> {    private StringBuilder builder;    //申请一个接口类对象    private  Icallbacks icallbacks;    //将无参构造设置成私有的，使之在外部不能够调用    private MyTask(){}    //定义有参构造方法    public MyTask(Icallbacks icallbacks) {        this.icallbacks = icallbacks;    }    @Override    protected String doInBackground(String... strings) {        try {            URL url=new URL(strings[0]);            HttpURLConnection urlConnection =(HttpURLConnection) url.openConnection();            //设置            urlConnection.setRequestMethod("GET");            urlConnection.setConnectTimeout(5000);            urlConnection.setConnectTimeout(5000);            //判断            if (urlConnection.getResponseCode()==200){                InputStream inputStream=urlConnection.getInputStream();                BufferedReader reader=new BufferedReader(new InputStreamReader(inputStream));                String str;                builder = new StringBuilder();                //循环                while((str=reader.readLine())!=null){                    builder.append(str);                }                return builder.toString();            }        } catch (Exception e) {            e.printStackTrace();        }        return null;    }    @Override    protected void onPostExecute(String s) {        super.onPostExecute(s);        //解析，封装到bean,更新ui组件        icallbacks.updateUiByjson(s);            }    //定义一个接口    public interface Icallbacks{        /**         * 根据回传的json字符串，解析并更新页面组件         * @param jsonstr         */        void updateUiByjson(String jsonstr);    }}