在 Android 中发送 POST 数据 [英] Sending POST data in Android

问题描述

我对 PHP、JavaScript 和许多其他脚本语言有经验，但对 Java 或 Android 没有太多经验.

I'm experienced with PHP, JavaScript and a lot of other scripting languages, but I don't have a lot of experience with Java or Android.

我正在寻找一种将 POST 数据发送到 PHP 脚本并显示结果的方法.

I'm looking for a way to send POST data to a PHP script and display the result.

推荐答案

注意(2020 年 10 月):Android API 级别 30 中已弃用以下答案中使用的 AsyncTask.请参阅 官方文档 或 这篇博文 一个更新的例子

Note (Oct 2020): AsyncTask used in the following answer has been deprecated in Android API level 30. Please refer to Official documentation or this blog post for a more updated example

更新(2017 年 6 月)适用于 Android 6.0+ 的答案.感谢 @Rohit Suthar，@Tamis Bolvari 和 @sudhiskr 的评论.

Updated (June 2017) Answer which works on Android 6.0+. Thanks to @Rohit Suthar, @Tamis Bolvari and @sudhiskr for the comments.

    public class CallAPI extends AsyncTask<String, String, String> {
    
        public CallAPI(){
            //set context variables if required
        }
    
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }
    
         @Override
         protected String doInBackground(String... params) {
            String urlString = params[0]; // URL to call
            String data = params[1]; //data to post
            OutputStream out = null;

            try {
                URL url = new URL(urlString);
                HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                out = new BufferedOutputStream(urlConnection.getOutputStream());

                BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(out, "UTF-8"));
                writer.write(data);
                writer.flush();
                writer.close();
                out.close();

                urlConnection.connect();
            } catch (Exception e) {
                System.out.println(e.getMessage());
            }
        }
    }

参考文献:

• https://developer.android.com/reference/java/net/HttpURLConnection.html
• 如何使用 NameValuePair 使用 POST 向 HttpURLConnection 添加参数

原始答案(2010 年 5 月)

注意:此解决方案已过时.它仅适用于 5.1 以下的 Android 设备.Android 6.0 及更高版本不包括此答案中使用的 Apache http 客户端.

来自 Apache Commons 的 Http 客户端是要走的路.它已经包含在android中.这是一个如何使用它进行 HTTP Post 的简单示例.

Http Client from Apache Commons is the way to go. It is already included in android. Here's a simple example of how to do HTTP Post using it.

public void postData() {
    // Create a new HttpClient and Post Header
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost("http://www.yoursite.com/script.php");

    try {
        // Add your data
        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);
        
    } catch (ClientProtocolException e) {
        // TODO Auto-generated catch block
    } catch (IOException e) {
        // TODO Auto-generated catch block
    }
} 

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