Question

我正在测试使用android studio在android上运行的应用程序。但是我通过使用HttpURLConnection.getConnection（）遇到了问题“ Java.net.ConnectException：连接被拒绝”。

我已经尝试过这些：

检查服务器是否正在运行？
从浏览器访问URL

这是我的AsyncTask类：

public class MyTask extends AsyncTask<String, String, String> {

        protected  void onPostExecute(String... params){
            resValue = params[0];
        }

        @Override
        protected String doInBackground(String... params) {
            URL url;
            StringBuffer response = new StringBuffer();

            System.out.println(params[0]);
            try {
                url = new URL(params[0]);
            } catch (MalformedURLException e) {
                throw new IllegalArgumentException("invalid url");
            }

            HttpURLConnection conn = null;
            try {
                conn = (HttpURLConnection) url.openConnection();
                conn.setDoOutput(false);
                conn.setDoInput(true);
                conn.setUseCaches(false);
                conn.setRequestMethod("GET");
                conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");

                // handle the response
                int status = conn.getResponseCode();
                if (status != 200) {
                    throw new IOException("Post failed with error code " + status);
                } else {
                    BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                    String inputLine;
                    while ((inputLine = in.readLine()) != null) {
                        response.append(inputLine);
                    }
                    in.close();
                }
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if (conn != null) {
                    conn.disconnect();
                }

                String responseJSON = response.toString();
                System.out.print("This is doInBackground "+responseJSON);
                return responseJSON;
            }
        }

    }

Answer 1

发布您正在使用的网址，这可能是问题所在。您应该使用10.0.2.2 ip而不是127.0.0.1，因为它是默认的回送接口ip。

ASyncTask ConnectException：连接被拒绝

1 个答案: