OnCameraChangeListener vs getCameraPosition

[tobrun]

A user reported this:

I'm a bit confused about this listener. I'm setting new position (of course just once):

 mMapboxMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, zoom)); 

That works fine but the problem is with returned value, this is my basic code:

private void onCameraChangeListener(CameraPosition cameraPosition) {
        Timber.e("cameraPosition.zoom: " + cameraPosition.zoom + " mMapboxMap.getCameraPosition().zoom: " + mMapboxMap.getCameraPosition().zoom);
}

and here is the related log:

03-14 16:25:29.785 MapObserver: cameraPosition.zoom: 13.791596412658691 mMapboxMap.getCameraPosition().zoom: 13.791596412658691
03-14 16:25:29.801 MapObserver: cameraPosition.zoom: 14.0 mMapboxMap.getCameraPosition().zoom: 14.0
03-14 16:25:29.802 MapObserver: cameraPosition.zoom: 13.791596412658691 mMapboxMap.getCameraPosition().zoom: 14.0

The values coming from OnCameraChangeListener and getCameraPosition are slightly different.

[mpuchala]

Hey,

I've got suggestion about this issue, maybe it would be helpful.

Please take a look at public final void animateCamera(CameraUpdate update, int durationMs, final MapboxMap.CancelableCallback callback) method in MapboxMap class - shouldn't you invalidate camera position onFinish()/onCancel() like you do it here?:

    public final CameraPosition getCameraPosition() {
        if (mInvalidCameraPosition) {
            invalidateCameraPosition();
        }
        return mCameraPosition;
    }

After quick test I get proper value in OnCameraChangeListener parameter when I have sth like that:

public MapboxMap.CancelableCallback mCameraAnimationCallback = new MapboxMap.CancelableCallback() {
        @Override
        public void onCancel() {
            onCameraAnimationFinished();
        }

        @Override
        public void onFinish() {
            onCameraAnimationFinished();
        }
    };

    private void onCameraAnimationFinished() {
        mIsCameraAnimation = false;
        Timber.e("[MapObserver] Camera Animation - finish");
        mMapboxMap.getCameraPosition();
    }

[tobrun]

@mpuchala indeed invalidating the cameraposition in onCancel and onFinish produces better results.

[bleege]

Rebased and Merged into release-ios-3.2.0-android-4.0.0.