PHP POST请求到Android Volley POST请求

<?php
$url = "http://example.com/api"; // 服务器接口地址

$data = array(
    'param1' => 'value1',
    'param2' => 'value2'
); // 要发送的数据

$options = array(
    'http' => array(
        'header'  => "Content-type: application/x-www-form-urlencoded\r\n",
        'method'  => 'POST',
        'content' => http_build_query($data)
    )
);

$context  = stream_context_create($options);
$result = file_get_contents($url, false, $context);

if ($result === FALSE) {
    // 请求失败处理
} else {
    // 请求成功处理
    echo $result;
}
?>

String url = "http://example.com/api"; // 服务器接口地址

RequestQueue queue = Volley.newRequestQueue(context);
StringRequest stringRequest = new StringRequest(Request.Method.POST, url,
        new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                // 请求成功处理
                Log.d(TAG, "Response: " + response);
            }
        },
        new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                // 请求失败处理
                Log.e(TAG, "Error: " + error.getMessage());
            }
        }) {
    @Override
    protected Map<String, String> getParams() {
        Map<String, String> params = new HashMap<>();
        params.put("param1", "value1");
        params.put("param2", "value2");
        return params;
    }
};

queue.add(stringRequest);