Clicking on Overlays in MapView

I've created a MapActivity that uses MapView to place drawables on an ArrayList of points I've specified. This works great.

I want the user to be able to press each point and have a bubble appear (as when you are using Google Maps in your web browser) with some information about that point.

I can not figure out how to do this. Could someone po开发者_如何学运维int me to some good resources?

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If you are using ItemizedOverlay, just override onTap() in your overlay class. Here is a sample project demonstrating this.

The relevant snippet there is:

    @Override
    protected boolean onTap(int i) {
        Toast.makeText(NooYawk.this, items.get(i).getSnippet(),
                        Toast.LENGTH_SHORT).show();

        return(true);
    }

Instead of displaying a Toast, you can do something else. For example, here is a sample project that displays a popup. And here's an Android library project that displays bubbles that point to the actual marker.