如何使用android-volley发布字符串并返回php web服务的json对象数组

dependencies {
    implementation 'com.android.volley:volley:1.2.1'
}

RequestQueue requestQueue = Volley.newRequestQueue(context);
String url = "http://your-php-web-service-url";
StringRequest stringRequest = new StringRequest(Request.Method.POST, url,
        new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                // 在这里处理响应数据
                try {
                    JSONArray jsonArray = new JSONArray(response);
                    // 解析JSON数组并进行相应的操作
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        },
        new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                // 处理请求错误
            }
        }) {
    @Override
    protected Map<String, String> getParams() {
        // 设置POST请求的参数
        Map<String, String> params = new HashMap<>();
        params.put("key1", "value1");
        params.put("key2", "value2");
        return params;
    }
};

requestQueue.add(stringRequest);

<?php
// 接收POST请求的参数
$key1 = $_POST['key1'];
$key2 = $_POST['key2'];

// 执行相应的操作，生成JSON对象数组
$response = array();
$response[] = array("key" => "value1");
$response[] = array("key" => "value2");

// 返回JSON响应
header('Content-Type: application/json');
echo json_encode($response);
?>