Search all places in the city name

Now I use the Google Places API to get a list of restaurants in a certain city, for example,

https://maps.googleapis.com/maps/api/place/textsearch/xml?query=restaurants+in+Sydney&sensor=true&key=AddYourOwnKeyHere

But the problem is that we can only get 20 results and with the help in the answer we can again get 20 more, thereby we get only 60 results. next_page_token

Mentioned on the Google Places API page

The maximum number of results that can be returned is 60

So is there any other authentic way to get all the information about the Restaurant.

Just for information: I am implementing this in an Android application.