Question

I’m making an app that needs to show a location that I define with latitude and longitude. Everything goes fine, it opens Google maps in my app screen but the maps won’t show up!
This is the code I use…

public class MapsActivity extends MapActivity {

MapView mapView;
MapController mc;
GeoPoint p;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //vraag custom title bar
    requestCustomTitle();
    setContentView(R.layout.mapsactivity);
    //Titel dynamisch invullen volgens taalvoorkeuren, roept methode setCustomTitle op
    setCustomTitle(getResources().getString(R.string.MapsTitel));


    showZoom();
    locate(getIntent().getStringExtra("kantoorLat"), getIntent().getStringExtra("kantoorLng"));
    addMarker();

}
/*
 * De methode showZoom zorgt ervoor dat de zoombuttons worden getoond
 */

private void showZoom(){
    mapView = (MapView) findViewById(R.id.mapView);
    LinearLayout zoomLayout = (LinearLayout)findViewById(R.id.zoom);
    View zoomView = mapView.getZoomControls();

    zoomLayout.addView(zoomView, new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
    mapView.displayZoomControls(true);
}

/*
 * De methode locate zorgt ervoor dat de juiste locatie wordt getoond
 */
private void locate(String strlat, String strlng){
    mc = mapView.getController();
    String coordinates[] = {strlat,strlng};
    double lat = Double.parseDouble(coordinates[0]);
    double lng = Double.parseDouble(coordinates[1]);

    p = new GeoPoint((int)(lat * 1E6), (int)(lng * 1E6));
    mc.animateTo(p);
    mc.setZoom(17);
    mapView.invalidate();
}

/*
 * De methode addMarker zorgt ervoor dat er een indicator staat op de locatie
 */
private void addMarker(){
    MapOverlay mapOverlay = new MapOverlay();
    List<Overlay> listOfOverlays = mapView.getOverlays();
    listOfOverlays.clear();
    listOfOverlays.add(mapOverlay);
}

protected boolean isRouteDisplayed(){
    return false;
}

class MapOverlay extends com.google.android.maps.Overlay{
    @Override
    public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when){
        super.draw(canvas, mapView, shadow);

        Point screenPts = new Point();
        mapView.getProjection().toPixels(p,screenPts);

        Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.accentindicator);
        canvas.drawBitmap(bmp, screenPts.x+7, screenPts.y-19, null);
        return true;
    }
}

Answer 1

MD5 key will not work on different machines.

You need to generate MD5 debug key for the current SDK that you are using.

Generate the debug key for your current machine and try again.