无法从Android应用程序向已部署的PHP服务器发出REST API调用？

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

try {
    URL url = new URL("http://your-php-server/api-endpoint");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("GET");

    int responseCode = conn.getResponseCode();
    if (responseCode == HttpURLConnection.HTTP_OK) {
        // 处理服务器响应
        InputStream inputStream = conn.getInputStream();
        // ...
    } else {
        // 处理错误情况
    }

    conn.disconnect();
} catch (IOException e) {
    e.printStackTrace();
}