如何在 Android 中发送 POST 数据：AsyncTask 与现代方法？

如何在 Android 中发送 POST 数据

在 Android 开发时，了解如何将 POST 数据发送到远程服务器至关重要。本文提供了有关如何使用已弃用的 AsyncTask 和更现代的方法来实现此目的的全面指南。

已弃用的 AsyncTask 方法

以下代码片段演示了如何使用 AsyncTask 发送 POST 数据class:

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());
        }
    }
}

Android 6.0 的更新方法

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

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

        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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