从android中的php文件中检索文本消息

Question

以下是我集成的代码片段，用于将图像上传到WAMP服务器并从服务器获取响应。

private void uploadImage() {
        String name = "image";
        String path = p;
        try {
            String uploadid = UUID.randomUUID().toString();
            new MultipartUploadRequest(this, uploadid, UPLOAD_URL)
                    .addFileToUpload(path, "image")
                    .addParameter("name", name)
                    .setNotificationConfig(new UploadNotificationConfig())
                    .setMaxRetries(2)
                    .startUpload();

        } catch (Exception e) {
            e.printStackTrace();
        }
        Toast.makeText(second.this, " Before the SHOW msg" , Toast.LENGTH_SHORT).show();

        try{
            new Response.Listener<String>() {
                @Override
                public void onResponse(String s) {
                    Toast.makeText(second.this, s , Toast.LENGTH_SHORT).show();
                    CharSequence cs = s;
                    inf.setText(cs);
                }
            };

        }
        catch(Exception e) {
        e.printStackTrace();
        }

    }

onResponse方法中的代码无效，因为其中的toast消息未在移动设备中显示。我期待php中的echo消息被分配给字符串＆＃39; s＆＃39;在onResponse中，反过来消息在EditText（inf）上。