Unable to resolve host "<insert URL here>" No address associated with hostname
My bet is that you forgot to give your app the permission to use the internet. Try adding this to your android manifest:
<uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
Please, check if you have valid internet connection.
May you have taken permission
<uses-permission android:name="android.permission.INTERNET" /><uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
BUT