java - 如何将 Android Activity 中的变量提交到网站 url？

Question

我构建了一个像表单一样工作的应用程序，它有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(输入到这四个字段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 )，但我不确定如何去做。我想我正在寻找称为 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上找到的 http://developer.android.com/reference/java/net/HttpURLConnection.html

  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();
      }
  

非常感谢任何帮助，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。

尝试这样的事情:

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 中的样子。

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();
        }
    }
}