On zoom event for google maps on android

user_81398 0
Viewed 37759

We're building an application which is using the google maps api for android.

I have my MapController and MapView, and I enable the built-in zoom controls using:

mapView.setBuiltInZoomControls(true);

I would now like to get an event when the user actually zooms on the map, how do I go about that? I can find no such event or any general event where I could detect a change in zoom level.

Update

The mapView.getZoomControls() is deprecated. And the documentation suggests using mapView.setBuiltInZoomControls(bool) instead. This is okay, but I simply cannot figure out how to act on events from the built in zoom controls.

zooming google-maps events android java
11 Answers

As the OP said, use the onUserInteractionEvent and do the test yourself.

user_1237240

The android API suggests you use ZoomControls which has a setOnZoomInClickListener()

To add these zoom controls you would:

ZoomControls mZoom = (ZoomControls) mapView.getZoomControls();

And then add mZoom to your layout.

user_2434730

I think there might another answer to this question. The Overlay class draw method is called after any zoom and I believe this is called after the zoom level changes. Could you not architect your app to take advantage of this? You could even use a dummy overlay just to detect this if you wanted to. Would this not be more efficient than using a runnable with a delay?

@Override
public boolean draw (Canvas canvas, MapView mapView, boolean shadow, long when) {
    int zoomLevel = mapView.getZoomLevel();
    // do what you want with the zoom level
    return super.draw(canvas, mapView, shadow, when);
}
user_5554680
Related