My android studio is unable to imports fallowing libraries...
import com.esri.core.geometry.Point;
import com.esri.core.geometry.SpatialReference;
import com.esri.core.geometry.Unit;
import com.esri.core.map.Graphic;
import com.esri.core.symbol.PictureMarkerSymbol;
import com.esri.core.symbol.Symbol;
when ever i tried to import them erros occurs on "core " & "android"