在Volley中发出post请求的通用函数

public void sendPostRequest(String url, final Map<String, String> params, final Response.Listener<String> listener, final Response.ErrorListener errorListener) {
    StringRequest stringRequest = new StringRequest(Request.Method.POST, url,
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    listener.onResponse(response);
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    errorListener.onErrorResponse(error);
                }
            }) {
        @Override
        protected Map<String, String> getParams() {
            return params;
        }
    };

    RequestQueue requestQueue = Volley.newRequestQueue(context);
    requestQueue.add(stringRequest);
}