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POUsing ItemizedOverlay and OverlayItem In Android Beta 0.9
 

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    <p>Has anyone managed to use <code>ItemizedOverlays</code> in Android Beta 0.9? I can't get it to work, but I'm not sure if I've done something wrong or if this functionality isn't yet available. </p> <p>I've been trying to use the <code>ItemizedOverlay</code> and <code>OverlayItem</code> classes. Their intended purpose is to simulate map markers (as seen in Google Maps Mashups) but I've had problems getting them to appear on the map.</p> <p>I can add my own custom overlays using a similar technique, it's just the <code>ItemizedOverlays</code> that don't work.</p> <p>Once I've implemented my own <code>ItemizedOverlay</code> (and overridden createItem), creating a new instance of my class seems to work (I can extract OverlayItems from it) but adding it to a map's Overlay list doesn't make it appear as it should.</p> <p>This is the code I use to add the <code>ItemizedOverlay</code> class as an Overlay on to my <code>MapView</code>.</p> <pre><code>// Add the ItemizedOverlay to the Map private void addItemizedOverlay() { Resources r = getResources(); MapView mapView = (MapView)findViewById(R.id.mymapview); List&lt;Overlay&gt; overlays = mapView.getOverlays(); MyItemizedOverlay markers = new MyItemizedOverlay(r.getDrawable(R.drawable.icon)); overlays.add(markers); OverlayItem oi = markers.getItem(0); markers.setFocus(oi); mapView.postInvalidate(); } </code></pre> <p>Where <code>MyItemizedOverlay</code> is defined as:</p> <pre><code>public class MyItemizedOverlay extends ItemizedOverlay&lt;OverlayItem&gt; { public MyItemizedOverlay(Drawable defaultMarker) { super(defaultMarker); populate(); } @Override protected OverlayItem createItem(int index) { Double lat = (index+37.422006)*1E6; Double lng = -122.084095*1E6; GeoPoint point = new GeoPoint(lat.intValue(), lng.intValue()); OverlayItem oi = new OverlayItem(point, "Marker", "Marker Text"); return oi; } @Override public int size() { return 5; } } </code></pre>
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