Ok, i try it :)
1. I track gps points in my app and draw my route on a MapView:
@Override
public void onLocationChanged(Location loc)
{
if (loc != null)
{
latitude = loc.getLatitude();
longitude = loc.getLongitude();
if(first)
{
p1 = new GeoPoint((int) (loc.getLatitude()*1E6), (int)
(loc.getLongitude()*1E6));
mc.animateTo(p1);
mc.setZoom(18);
first=false;
//act_pos = new TrackOverlay(p1, p1,1); I NOW USE
MYLOCATIONOVERLAY
//map.getOverlays().add(act_pos);
mlo = new MyLocationOverlay(TRACKing.this, map);
map.getOverlays().add(mlo);
mlo.enableMyLocation();
mlo.runOnFirstFix(new Runnable() {
public void run() {
mc.animateTo(mlo.getMyLocation());
} });
}
else
{
p2 = p1;
p1 = new GeoPoint((int) (loc.getLatitude()*1E6), (int)
(loc.getLongitude()*1E6));
to = new TrackOverlay(p1, p2, 0);
//act_pos.setGeoPoints(p1, p2); I NOW USE
MYLOCATIONOVERLAY
map.getOverlays().add(to);
mc.animateTo(p1);
map.invalidate();
}
}
}
2. My TrackOverlay class:
public class TrackOverlay extends Overlay implements Parcelable
{
private static final int TRACK = 0;
private GeoPoint gp1, gp2;
private int mode;
public TrackOverlay(GeoPoint gp1,GeoPoint gp2, int mode)
{
this.gp1 = gp1;
this.gp2 = gp2;
this.mode = mode;
}
public void setGeoPoints (GeoPoint gp1, GeoPoint gp2)
{
this.gp1 = gp1;
this.gp2 = gp2;
}
@Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow,
long when)
{
Projection projection = mapView.getProjection();
if (shadow == false)
{
Paint paint = new Paint();
paint.setAntiAlias(true);
Point point = new Point();
if(gp1!=null && gp2 != null)
{
projection.toPixels(gp1, point);
if(mode==TRACK)
{
paint.setColor(Color.BLUE);
Point point2 = new Point();
projection.toPixels(gp2, point2);
paint.setStrokeWidth(5);
paint.setAlpha(120);
canvas.drawLine(point.x, point.y,
point2.x,point2.y, paint);
}
else
//atm nothing to do
}
}
return super.draw(canvas, mapView, shadow, when);
}
@Override
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
// TODO Auto-generated method stub
}
private TrackOverlay (Parcel in)
{
}
public static final Parcelable.Creator<TrackOverlay> CREATOR =
new Parcelable.Creator<TrackOverlay>()
{
public TrackOverlay createFromParcel(Parcel in)
{
return new TrackOverlay(in);
}
public TrackOverlay[] newArray(int size)
{
return new TrackOverlay[size];
}
};
}
3. If i want to describe a specific point, i start a new activity (via
menue). and if i come back to this activity, i cant see the overlays
any more. So how can I save my overlays??
Thanks,
Stefan
PS: I hope this help you...
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