Oops..forgot this import

Author: rogerhu

app/src/main/java/com/example/mapdemo/MapDemoActivity.java

@@ -3,6 +3,7 @@
 import com.google.android.gms.common.ConnectionResult;
 import com.google.android.gms.common.GooglePlayServicesUtil;
 import com.google.android.gms.common.api.GoogleApiClient;
+import com.google.android.gms.location.LocationListener;
 import com.google.android.gms.location.LocationRequest;
 import com.google.android.gms.location.LocationServices;
 import com.google.android.gms.maps.CameraUpdate;