Question

我正在尝试将我的表单数据从android发布到网站。我搜索过，这里是我经常找到的代码。

HttpClient httpclient = new DefaultHttpClient();
         HttpPost httppost = new HttpPost("http://localhost/adminp/script.php");

         List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
         nameValuePairs.add(new BasicNameValuePair("id", "12345"));
         nameValuePairs.add(new BasicNameValuePair("stringdata", "Hi"));
         httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

         // Execute HTTP Post Request
         HttpResponse response = httpclient.execute(httppost);

然而，有两件事会产生问题。首先，UrlEncodedFormEntity并执行两个显示错误： "Error:(94, 29) error: unreported exception UnsupportedEncodingException; must be caught or declared to be thrown"和

"Error:(97, 52) error: unreported exception IOException; must be caught or declared to be thrown".

请指导我如何解决这个问题。

第二，HTTPClient等自API 22以来已被弃用，如果有人知道发布方法的最新教程（URLConnection），请与我分享，我将负债累累。

Answer 1

来自Android sending post data to webservice

使用调用sendPostRequest（String username，String pass）方法参数。您可以从UI线程（请求）中调用此方法将从另一个线程发送（嵌入了AsyncTask）。

private void sendPostRequest(String givenUsername, String givenPassword) {

    class SendPostReqAsyncTask extends AsyncTask<String, Void, String> {

        @Override
        protected String doInBackground(String... params) {
            String paramUsername = params[0];
            String paramPassword = params[1];

            System.out.println("*** doInBackground ** paramUsername "
                + paramUsername + " paramPassword :" + paramPassword);

            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(
                "http://lib-dm.process9.com/libertydm/ValidateUserHandler.ashx"); //> replace with your url

            httpPost.addHeader("Content-type",
                "application/x-www-form-urlencoded");
            BasicNameValuePair usernameBasicNameValuePair = new BasicNameValuePair(
                "UserId", paramUsername);  // Make your own key value pair
            BasicNameValuePair passwordBasicNameValuePAir = new BasicNameValuePair(
                "Password", paramPassword);// make your own key value pair

            // You can add more parameters like above

            List<NameValuePair> nameValuePairList = new ArrayList<NameValuePair>();
            nameValuePairList.add(usernameBasicNameValuePair);
            nameValuePairList.add(passwordBasicNameValuePair);

            try {
                UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(
                    nameValuePairList);
                httpPost.setEntity(urlEncodedFormEntity);

                try {
                    HttpResponse httpResponse = httpClient
                        .execute(httpPost);
                    InputStream inputStream = httpResponse.getEntity()
                        .getContent();
                    InputStreamReader inputStreamReader = new InputStreamReader(
                        inputStream);
                    BufferedReader bufferedReader = new BufferedReader(
                        inputStreamReader);
                    StringBuilder stringBuilder = new StringBuilder();
                    String bufferedStrChunk = null;
                    while ((bufferedStrChunk = bufferedReader.readLine()) != null) {
                        stringBuilder.append(bufferedStrChunk);
                    }

                    return stringBuilder.toString();

                    } catch (ClientProtocolException cpe) {
                        System.out
                            .println("First Exception coz of HttpResponese :"
                                + cpe);
                        cpe.printStackTrace();
                    } catch (IOException ioe) {
                        System.out
                            .println("Second Exception coz of HttpResponse :"
                                + ioe);
                        ioe.printStackTrace();
                    }

            } catch (UnsupportedEncodingException uee) {
                System.out
                    .println("An Exception given because of UrlEncodedFormEntity argument :"
                        + uee);
                uee.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
        }
    }

    SendPostReqAsyncTask sendPostReqAsyncTask = new SendPostReqAsyncTask();
    sendPostReqAsyncTask.execute(givenUsername, givenPassword);
}

从Android活动到网站的POST数据

1 个答案: