在Android Studio中调用其他Java类中的实例和函数后，在主Java类中等待响应

Question

由于api调用和响应延迟，数据无法及时获取，我正在使用延迟来获取响应。如果那里的响应延迟超过我的定时器限制，我会得到空错误。有没有更好的方法来实现这一点

这是我在UrlCalls中的代码。爪哇

public void getProfile()
{
    progressDialog=new ProgressDialog(con);
    progressDialog.setMessage("Please wait...");
    progressDialog.show();
    AuthTokenGenerator authtoken = new AuthTokenGenerator(con);
    Authenticator profilerequest = new Authenticator(Request.Method.POST, UrlBag.PROFILE, authtoken.getToken(data),
            new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject profileresponse) {
                    response = String.valueOf(profileresponse);
                    progressDialog.dismiss();
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error)
                {
                    progressDialog.dismiss();
                    Toast.makeText(con,"Couldn't connect to server right now.",Toast.LENGTH_SHORT).show();
                }
            })
    {
        @Override
        public Map<String, String> getParams()
        {
            Map<String, String> params = new HashMap<>();
            params.put("customer_id", data.GetData(SharedDataHandler.CUSTOMER_ID));
            return params;
        }

    };

    int socketTimeout = 1000;//30 seconds - change to what you want
    RetryPolicy policy = new DefaultRetryPolicy(socketTimeout, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
    profilerequest.setRetryPolicy(policy);

    RequestQueue requestQueue = Volley.newRequestQueue(con);
    requestQueue.add(profilerequest);
}

我在我的主线程中调用这个

final UrlCalls callProfile=new UrlCalls(this,data);
    callProfile.getProfile();
    final Handler handler = new Handler();
    handler.postDelayed(new Runnable() {
        @Override
        public void run()
        {
            try
            {
                jObject = new JSONObject(String.valueOf(callProfile.getResponse()));
                if (!jObject.equals(""))
                {
                    JSONObject customer = jObject.getJSONObject("customer");
                    customername.setText(customer.getString("customer_name"));
                    data.SaveData(SharedDataHandler.FULL_NAME, customer.getString("customer_name"));
                    customeremail.setText(customer.getString("email"));
                    data.SaveData(SharedDataHandler.EMAIL, customer.getString("email"));
                    customerphone.setText(customer.getString("mobile"));
                    data.SaveData(SharedDataHandler.MOBILE, customer.getString("mobile"));
                }
                else
                {
                    Toast.makeText(getApplicationContext(),"Server Request time out.",Toast.LENGTH_SHORT).show();
                }
            }
            catch(JSONException e)
            {
                Toast.makeText(getApplicationContext(),"Error occurred while processing the data.",Toast.LENGTH_SHORT).show();
            }
            catch (NullPointerException e)
            {
                Toast.makeText(getApplicationContext(),"Couldn't connect to server right now.",Toast.LENGTH_SHORT).show();
            }
        }
    }, 1000);