I am developing an android application as part of a project, and am using Google places API to display places of interest based on location. I am using the PlacePicker Inent
I was having the same issue. Make sure you enable Google Places API for Android and not just Places API in the Developer Console. "Places API for Android" will not show up under APIs & Auth/APIs because it isn’t a popular API (yet). You will have to search for it using the API search box.