如何在Java (Android App)中通过POST请求将音频文件发送到服务器？

<uses-permission android:name="android.permission.INTERNET" />

private class UploadAudioTask extends AsyncTask<String, Void, String> {
    @Override
    protected String doInBackground(String... params) {
        String audioFilePath = params[0];
        String serverUrl = params[1];

        try {
            // 创建HTTP连接
            URL url = new URL(serverUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setDoOutput(true);

            // 设置请求头
            connection.setRequestProperty("Content-Type", "audio/mpeg");

            // 读取音频文件并写入请求体
            File audioFile = new File(audioFilePath);
            FileInputStream fileInputStream = new FileInputStream(audioFile);
            OutputStream outputStream = connection.getOutputStream();
            byte[] buffer = new byte[4096];
            int bytesRead;
            while ((bytesRead = fileInputStream.read(buffer)) != -1) {
                outputStream.write(buffer, 0, bytesRead);
            }
            outputStream.flush();
            outputStream.close();
            fileInputStream.close();

            // 获取服务器响应
            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                // 上传成功
                return "上传成功";
            } else {
                // 上传失败
                return "上传失败，错误码：" + responseCode;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return "上传失败，异常：" + e.getMessage();
        }
    }

    @Override
    protected void onPostExecute(String result) {
        // 处理上传结果
        Toast.makeText(MainActivity.this, result, Toast.LENGTH_SHORT).show();
    }
}

String audioFilePath = "/path/to/audio/file.mp3";
String serverUrl = "http://your-server-url.com/upload";
new UploadAudioTask().execute(audioFilePath, serverUrl);