Android :: Cannot Zoom Or Set Traffic View In Map

In the following application.

package mycom.ju.gmap; //import HelloItemizedOverlay;
import mycom.ju.gmap.R; import android.graphics.drawable.Drawable;
import android.os.Bundle; import android.view.View; import android.webkit.WebSettings;
import android.webkit.WebView; import android.widget.*;
import com.google.android.maps.GeoPoint; import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView; import com.google.android.maps.Overlay;
import java.util.ArrayList; import java.util.List;
import com.google.android.maps.ItemizedOverlay; import com.google.android.maps.OverlayItem;
public class gmap extends MapActivity { //Called when the activity is first created.
MapView mapView; Toast toast;
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
try{ mapView = (MapView)findViewById(R.id.mapv);
mapView.setBuiltInZoomControls(true); mapView.displayZoomControls(true);
mapView.setTraffic(true); } catch(Exception e){ toast = Toast.makeText(this,e.toString(), Toast.LENGTH_LONG); toast.show(); } setContentView(R.layout.main);
} @Override protected boolean isRouteDisplayed() {
return true; } }