http client (HttpURLConnection) request the link https://maps.googleapis.com/maps/api/geocode/json?address=1600+Amphitheatre+Parkway,+Mountain+View,+CA&key=YOUR_API_KEY
If you limit YOUR_API_KEY to use only on the android application (specify the package name and sha1), then the request stops responding.
It turns out in my case, you can not restrict the key to use only in a specific application?