Resizable MapView (centers to container)

MainActivity

package com.qozix.mapviewdemo;

import android.app.Activity;
import android.os.Bundle;
import android.view.ViewGroup.LayoutParams;
import android.widget.RelativeLayout;

import com.qozix.mapview.MapView;
import com.qozix.mapview.MapView.MapEventListenerImplementation;

public class MainActivity extends Activity {

  private RelativeLayout relativeLayout;
	private MapView mapView;
	
	@Override
	public void onCreate( Bundle savedInstanceState ) {
		
		super.onCreate( savedInstanceState );
		
		relativeLayout = new RelativeLayout( this );
		setContentView( relativeLayout );
		
		mapView = new MapView( this );
		
		mapView.setScaleLimits( 0.1, 1.0 );
		mapView.setScaleToFit( false );
		
		mapView.addMapEventListener( listener );
		
		mapView.addZoomLevel( 1159, 951, "tiles/125_%col%_%row%.png", "downsamples/map.png" );
		mapView.addZoomLevel( 2318, 1902, "tiles/250_%col%_%row%.png", "downsamples/map.png" );
		mapView.addZoomLevel( 4635, 3803, "tiles/500_%col%_%row%.png", "downsamples/map.png" );
		mapView.addZoomLevel( 9269, 7606, "tiles/1000_%col%_%row%.png", "downsamples/map.png" );
		
		mapView.registerGeolocator( 42.379676, -71.094919, 42.346550, -71.040280);
		
		RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT );
		lp.addRule( RelativeLayout.CENTER_IN_PARENT );
		relativeLayout.addView( mapView, lp );
		
		
	}
	
	private MapEventListenerImplementation listener = new MapEventListenerImplementation(){
		@Override
		public void onScaleChanged( double scale ){
			int containingWidth = relativeLayout.getWidth();
			int containingHeight = relativeLayout.getHeight();
			int mapWidth = mapView.getScaledWidth();
			int mapHeight = mapView.getScaledHeight();
			
			RelativeLayout.LayoutParams lp = (RelativeLayout.LayoutParams) mapView.getLayoutParams();
			if( mapWidth < containingWidth ) {
				lp.width = mapWidth;
			} else {
				lp.width = LayoutParams.MATCH_PARENT;
			}
			
			if( mapHeight < containingHeight ) {
				lp.height = mapHeight;				
			} else {
				lp.height = LayoutParams.MATCH_PARENT;
			}			
			mapView.setLayoutParams(lp);
		}
	};
	
	@Override
	public void onPause(){
		super.onPause();
		mapView.clear();
	}
	
	@Override
	public void onResume(){
		super.onResume();
		mapView.requestRender();
	}


	@Override
	public void onDestroy(){
		super.onDestroy();
		mapView.destroy();
		mapView = null;
	}
}