Resizing Actual MapView - not contents in mapview

Issue

I'm trying to resize my MapView when a user clicks a certain button (ie - go from a mapview a quarter of the screen size to full screen size) however I do not know how to do it!

I've tried mMapView.setLayoutParams(new MapView.LayoutParams(250, 250, 0, 0, 6)); but that only gives me errors (ClassCastException).

I can't think of anything else (and searching has not come up with much).

Solution

Try this:

        MapView map = new MapView(this, "");
        map.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
        map.setLayoutParams(new ViewGroup.LayoutParams(200, 200));

By the way as a general rule, never use absolute positioning (250 pixels) to do anything in Android - it'll cause problems when used on different devices. Use relative layouts, or at the very least device independent pixels (dip). So for example you could set the layout_width to wrap_content, the layout_weight of the MapView to 1 (so it stetches to fill the available space), and then place another UI element to its side, taking up some of the space, and the map will then reduce in size.

Answered By - Ollie C