Google Map Lite Mode moveCamera to lat lng bounds adds unwanted map padding

问题

I want map camera to move to my LatLngBounds. So I add map fragment to layout in BaseExpandableListAdapter's getChildView and onMapReady I'll moveCamera to LatLngBounds

@Override
public View getChildView(final int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {

    convertView = inflater.inflate(R.layout.event_child, parent, false);

    GoogleMapOptions options = new GoogleMapOptions();
    options.liteMode(true)
           .compassEnabled(false)
           .mapToolbarEnabled(false)
           .rotateGesturesEnabled(false)
           .tiltGesturesEnabled(false)
           .scrollGesturesEnabled(false)
           .zoomControlsEnabled(false)
           .zoomGesturesEnabled(false);

    SupportMapFragment mapFragment = SupportMapFragment.newInstance(options);
    FragmentTransaction transaction = fragmentManager.beginTransaction();
    transaction.add(R.id.event_fragment_map, mapFragment, "event_fragment_map").commit();

    mapFragment.getMapAsync(new OnMapReadyCallback() {
        @Override
        public void onMapReady(GoogleMap googleMap) {
            mGoogleMap = googleMap;
            moveMapAddBounds();
        }
    });

//...
}

private void moveMapAddBounds(){
    mGoogleMap.addPolygon(new PolygonOptions().add(getLatLngBounds().southwest)
                                              .add(new LatLng(getLatLngBounds().northeast.latitude, getLatLngBounds().southwest.longitude))
                                              .add(getLatLngBounds().northeast)
                                              .add(new LatLng(getLatLngBounds().southwest.latitude, getLatLngBounds().northeast.longitude))
                         );
    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(getLatLngBounds(), 0));
}

public LatLngBounds getLatLngBounds() {
    //random fake latlng and distance
    LatLng from = new LatLng(51.1113564, 17.0041787);
    double distance = 1717.906494140625;
    return new LatLngBounds.Builder().
            include(SphericalUtil.computeOffset(from, distance, 0)).
            include(SphericalUtil.computeOffset(from, distance, 90)).
            include(SphericalUtil.computeOffset(from, distance, 180)).
            include(SphericalUtil.computeOffset(from, distance, 270)).build();
}

I'm calculating bounds according to http://googlemaps.github.io/android-maps-utils/ and it seems to work OK as the rectangle added to map in moveMapAddBounds is added in valid positions but the map camera is moved to almost good position with the exception that it adds a random (?) paddings to map (symmetric above and below the rectangle) as seen on picture:

I've observed that those paddings are always the same for a particular LatLngBounds but they differ between different LatLngBounds.

回答1:

The reason was I used Lite Mode where only integer zooms are available.

http://code.google.com/p/gmaps-api-issues/issues/detail?id=7573&q=apitype%3AAndroid2%20type%3ADefect&sort=-id%20-stars&colspec=ID%20Type%20Status%20Introduced%20Fixed%20Summary%20Internal%20Stars

来源：https://stackoverflow.com/questions/28106979/google-map-lite-mode-movecamera-to-lat-lng-bounds-adds-unwanted-map-padding