HttpHostConnectException: Connection refused Android

Question

I am trying to connect via HttpPost and send a username and password to a website and then receive a string from that website. I have tried various methods that have worked for

Answer 1

The problem is in wifi sleeping. Please use

WifiManager wm = (WifiManager) getSystemService(Context.WIFI_SERVICE);
wifiLock = wm.createWifiLock(WifiManager.WIFI_MODE_FULL , "MyWifiLock");
wifiLock.acquire();

and permission:

uses-permission android:name="android.permission.WAKE_LOCK";