title: Arcgis for Android 10.2 mapView zoom out level
body: <p>I need to zoom out my map. I have tried --mMapView.zoomout();-- but it only zoom out 1 level, I want to zoom out further. I know can do in .xml --mapoptions.ZoomLevel="5"-- but I wanted to put in my Activity Class. Some guides is needed, thank you very much.</p>