Android: Map Overlay Labels
- by karnage
I am building a MapView and I want my custom overlay items to display the name of the location they are marking when the user taps them, like the Android Maps app.
I setup the onTap listener and the floating TextView to hold the location name. I still need to set it up so that it redraws the label when the user moves the map, etc.
Anyway, I am wondering if I am reinventing the wheel here. Is there a built-in method I am unaware of? I would think that most implementations of MapView have labels.
For reference, my implementation so far:
in map xml:
<LinearLayout android:id="@+id/mapBubbleWrap"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true">
<TextView android:id="@+id/mapBubble"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone"
android:background="#ffffff"
android:textColor="#ff0000"/>
</LinearLayout>
in my extended ItemizedOverlay:
public boolean onTap(int index) {
this.setFocus( mOverlays.get(index) );
return true;
}
in my Activity onFocus:
public void onFocusChanged( ItemizedOverlay overlay, OverlayItem item ) {
if( item != null) {
mapBubble.setText(item.getTitle());
Point newPoint = mapView.getProjection().toPixels(item.getPoint(), null);
mapBubbleWrap.setPadding(newPoint.x, newPoint.y-10, 0, 0);
mapBubble.setVisibility(View.VISIBLE);
}
}
