I'm still a bit confused on what you're doing, but I would suggest: 1 - Subclass ItemizedOverlay instead of Overlay to manage a collection of similar items at once. It maintains a list OverlayItems that represent each unique point on the map. In your case these would be the Track points you have.
2 - In your subclass, implement Parcelable and the write method and constructor that are required to read from / write to a Parcel. In this case you would write out / read back each of your OverlayItem's location. ------------------------------------------------------------------------------------------------- TreKing - Chicago transit tracking app for Android-powered devices http://sites.google.com/site/rezmobileapps/treking On Tue, Jan 5, 2010 at 5:47 PM, Stefan <ebay-dah...@web.de> wrote: > hi, > thanks for your answer :) > > On Jan 5, 11:30 pm, TreKing <treking...@gmail.com> wrote: > > OK, well your main problem is that while you implemented the Parcelable > > class, you didn't implement the writeToParcel method or the constructor > that > > takes a Parcel. That's the key. > > > > in one other class of my app i has implement the parcelable to, but > there i mustnt implement these methods. i dont know why but it works. > this other class is my "SaveHelper" class (its like a singleton - i > only have one object), where i save my track/route... and i test it: i > walk around my block and i rotate the handy several times > (==>recreation of my activity..). and after saving my gpx file i see, > that ALL points are saved. > > > You need to implement the first method to save all you state information > > (i.e., your member variables) to the Parcel object. > > Then implement the constructor to restore your instance state from the > > incoming Parcel object. > > I override my Overlay object, how you can see in my code and because > of that i would only get the last overlay back?!?! > I think you mean, that i do following: > > @Override > public void writeToParcel(Parcel dest, int flags) { > // TODO Auto-generated method stub > dest.writeInt( (int)gp1.getLatitude()); //something like > that > } > > and > > private TrackOverlay(Parcel in) { > gp1.setLatitude(in.readInt()); > } > > but the onSaveInstanceState will only be called, if i pause the > activity?! So i can only save the last to (TrackOverlay) object?!?! > Or if i implement these methods i save all my Overlays?!? > > > > > Then in your MapActivity onSavedInstanceState, iterate through all of > your > > Overlays and shove them into an array you can store in the Bundle. > > In onRestoreInstanceState, get a list of Parcelables from the Bundle and > > re-create all of your Overlays (using the constructor that takes a > Parcel). > > Perhaps it is easier to save all GeoPoints in a list and in > onSaveInstanceState() i iterate through that list and save all > GeoPoints in a "int [] lat" and "int [] lon" array and put it to my > bundle and in onRestoreInstanceState i read this arrays and iterate > through these arrays and draw the Overlays again, like: > > gp1.setLatitude(lat[0]); ..... > for(int i= 1; i< lat.length; i++) > { > gp2 = gp1; > gp1.setLatitude(..) > ... > newOverlay = new TrackOverlay(gp1, gp2, MODUS); > map.getOverlays().add(newOverlay); > } > map.ivalidate(); > > > > But what is more efficient and/or more elegant ? > > > > > Other bit of advise: get rid of that "if (first) { /*initialze*/}" code. > Set > > up your MyLocationOverlay object in onCreate. If you need to have a > starting > > location while you wait for the first update, use getLastKnownLocation(). > > > > Yes, this is not the best solution and i will optimize it soon :) > > > I hope that makes sense and helps some. > > Thanks for your detailed answer. > > Stefan > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com<android-developers%2bunsubscr...@googlegroups.com> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en >
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