Android mapView ItemizedOverlay setFocus does not work properly
- by Gaks
Calling setFocus(null) on the ItemizedOverlay does not 'unfocus' current marker. According to the documentation:
... If the Item is not found, this is a no-op. You can also pass null to remove focus.
Here's my code:
MapItemizedOverlay
public class MapItemizedOverlay extends ItemizedOverlay<OverlayItem> {
private ArrayList<OverlayItem> items = new ArrayList<OverlayItem>();
public MapItemizedOverlay(Drawable defaultMarker) {
super(defaultMarker);
}
public void addOverlay(OverlayItem overlay) {
items.add(overlay);
populate();
}
@Override
protected OverlayItem createItem(int i) {
return items.get(i);
}
@Override
public int size() {
return items.size();
}
}
Creating map overlay and one marker:
StateListDrawable youIcon = (StateListDrawable)getResources().getDrawable(R.drawable.marker_icon);
int width = youIcon.getIntrinsicWidth();
int height = youIcon.getIntrinsicHeight();
youIcon.setBounds(-13, 0-height, -13+width, 0);
GeoPoint location = new GeoPoint(40800816,-74122009);
MapItemizedOverlay overlay = new MapItemizedOverlay(youIcon);
OverlayItem item = new OverlayItem(location, "title", "snippet");
overlay.addOverlay(item);
mapView.getOverlays().add(overlay);
The R.drawable.marker_icon is defined as follows:
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:drawable="@drawable/marker_selected" />
<item android:state_selected="true" android:drawable="@drawable/marker_selected" />
<item android:drawable="@drawable/marker_normal" />
</selector>
Now, to test the setFocus() behavior I put the button on the activity window, with the following onClick listener:
Button focusBtn = (Button)findViewById(R.id.focusbtn);
focusBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
for(Overlay ov : mapView.getOverlays())
{
if(ov.getClass().getSimpleName().equals("MapItemizedOverlay") == true)
{
MapItemizedOverlay miv = (MapItemizedOverlay)ov;
if(miv.getFocus() == null)
miv.setFocus(miv.getItem(0));
else
miv.setFocus(null);
break;
}
}
mapView.invalidate();
}
});
The expected behavior is: clicking on the button toggles marker selection.
It works only once - clicking it for the first time selects the marker, clicking it again does not de-select the marker. The most weird thing about it is that after calling setFocus(null), getFocus() also returns null - like the overlay has no focused item (I debugged it). But even after calling mapView.invalidate() the marker is still drawn in 'selected'(focused) state.
