如何将变量从 Android Activity 提交到网站 url？

Question

我构建了一个像表单一样工作的应用程序，它需要四个字段并验证信息以确保没有输入无效字符。这四个字段存储在变量中：

• 电话
• 姓名
• 电子邮件

• 评论

  现在我想将表单数据（在这四个字段中输入并存储到变量中的任何内容）提交到一个 url（将使用http://www.test.com），但我不知道如何去做。我想我正在寻找一种叫做 HttpURLConnection 的东西，但我不确定如何指定发送哪个变量。下面的代码是我从网站http://developer.android.com/reference/java/net/HttpURLConnection.html找到的

  private class UploadFilesTask extends AsyncTask<URL, Integer, Long>{
  protected Long doInBackground(URL... urls) {
  
      try {
          HttpClient http = new DefaultHttpClient();
          HttpPost post = new HttpPost("http://www.test.com");
  
          List<NameValuePair> data = new ArrayList<NameValuePair>();
          data.add(new BasicNameValuePair("phone", "value"));
          data.add(new BasicNameValuePair("name", "value"));
          data.add(new BasicNameValuePair("email", "value"));
          data.add(new BasicNameValuePair("comments", "value"));
          post.setEntity(new UrlEncodedFormEntity(data));
  
          HttpResponse response = http.execute(post);
          // do something with the response
      }
      catch (ClientProtocolException e) {
          // do something
          finish();
      }
      catch (IOException e) {
          // do something
          finish();
      }
  

  }

  }

任何帮助将不胜感激，谢谢！

Answer 1

将表单数据发送到服务器的最简单方法是使用 HttpClient 和 HttpPost。

试试这样的：

try {
    HttpClient http = new DefaultHttpClient();
    HttpPost   post = new HttpPost("http://www.example.com/process");

    List<NameValuePair> data = new ArrayList<NameValuePair>();
    data.add(new BasicNameValuePair("phone", "value");
    data.add(new BasicNameValuePair("name", "value");
    data.add(new BasicNameValuePair("email", "value");
    data.add(new BasicNameValuePair("comments", "value");
    post.setEntity(new UrlEncodedFormEntity(data));

    HttpResponse response = http.execute(post);
    // do something with the response
}
catch (ClientProtocolException e) {
    // do something
}
catch (IOException e) {
    // do something
}

请注意，您需要在 AsyncTask 中执行此操作，这样您就不会锁定等待网络操作完成的 UI 线程。

编辑

这是一个简单的快速示例，说明它在 AsyncTask 中的外观。

public class SendTask extends AsyncTask<Void, Void, Boolean> {

    String responseString;

    @Override
    protected Boolean doInBackground(Void... params) {
        try {

            HttpClient http = new DefaultHttpClient();
            HttpPost post = new HttpPost("http://www.test.com");

            List<NameValuePair> data = new ArrayList<NameValuePair>();
            data.add(new BasicNameValuePair("phone", "value"));
            data.add(new BasicNameValuePair("name", "value"));
            data.add(new BasicNameValuePair("email", "value"));
            data.add(new BasicNameValuePair("comments", "value"));
            post.setEntity(new UrlEncodedFormEntity(data));

            HttpResponse response = http.execute(post);
            responseString = new BasicResponseHandler().
                                 handleResponse(response); // Basic handler
            return true;
        }
        catch (ClientProtocolException e) {
            // do something useful to recover from the exception
            // Note: there may not be anything useful to do here
        }
        catch (IOException e) {
            // do something useful to recover from the exception
            // Note: there may not be anything useful to do here
        }           
        return false;
    }
    @Override
    protected void onPostExecute(Boolean success) {
        // TODO: Do something more useful here
        if (success) {
            Toast.makeText(MainActivity.this, "Success: " + responseString, Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(MainActivity.this, "Failed", Toast.LENGTH_LONG).show();
        }
    }
}

Answer 2

将字段作为参数添加到 url。

String phone="phone=234432";
String name="name=John Smith";
String email="email=test@email.com"; 

Url = new URL("http://www.test.com?"+phone+"&"+name+"&"+email);

未经测试，但它应该可以在 GET Http 请求中工作。

Answer 3

//使用xml请求

String url="http://www.test.com";
String xmlRequest="<message xmlns=\"http://test.com/schemas/ma\"><header></header>"+
"<body><phone>9944556622</phone><name>Mytest name</name><email>mytest@email.com</email>"+"<comments>hay this seems nice</comments></body></message>"

HttpPost httppost = new HttpPost(url);
    StringEntity se = new StringEntity(xmlRequest,HTTP.UTF_8);


httppost.setHeader("Content-Type","application/xml");
httppost.setHeader("Accept","application/xml");

httppost.setEntity(se);

BasicHttpResponse httpResponse = (BasicHttpResponse) httpclient.execute(httppost);

   StatusLine statusLine = httpResponse.getStatusLine();

Answer 4

    HttpClient httpClient = new DefaultHttpClient();
                    Log.i("sampath","line 139");
                    HttpPost httpPost = new HttpPost(url);

                    BasicNameValuePair usernameBasicNameValuePair = new BasicNameValuePair("textMessage", msg);

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

                    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("Firstption caz of HttpResponese :" + cpe);
                            cpe.printStackTrace();
                        } catch (IOException ioe) {
                            System.out.println("Secondption caz of HttpResponse :" + ioe);
                            ioe.printStackTrace();
                        }

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

//---------------------------------------------------------------------------
Here is the php file

<?php
$message = $_POST['textMessage'];
echo 'working fine'.$message;
$filename="androidmessages.html";
file_put_contents($filename,"Entered Text is:".$message."<br />",FILE_APPEND);
?>