AsyncTask和网络请求

public class HttpUtils {
    public static void AsynTask(String strUrl, final CallBackString backString){
        new AsyncTask<String, Integer,String>(){

            @Override
            protected String doInBackground(String... strings) {
                return Httpget(strings[0]);
            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                //接口回调方法
              backString.getData(s);
            }
        }.execute(strUrl);
    }
    //接口
    public interface  CallBackString{
        void  getData(String s);
    }
//get请求网络数据
    public static String Httpget(String http) {
        try {
        //设置URL
            URL url = new URL(http);
            //获取HttpURLConnection
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            //设置为get请求
            connection.setRequestMethod("GET");
            //设置连接主机超时时间
            connection.setConnectTimeout(5000);
             //设置从主机读取数据超时
            connection.setReadTimeout(5000);
            
            int code = connection.getResponseCode();
            if (code == 200) {
            //得到数据
                InputStream stream = connection.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(stream, "UTF-8"));
                //拼接数据
                StringBuilder builder = new StringBuilder();
                String s = "";
                while ((s = reader.readLine()) != null) {
                    builder.append(s);
                }
                //返回数据
                return builder.toString();
            }
            //关闭连接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();

        }
        return null;
    }
}