Mega Code Archive
Extends ItemizedOverlay
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package app.test;
import java.util.ArrayList;
import java.util.Iterator;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.Log;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.OverlayItem;
public class MappingOverlayActivity extends MapActivity {
private MapView mapView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mapview);
mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
Drawable marker=getResources().getDrawable(R.drawable.mapmarker);
marker.setBounds((int)(-marker.getIntrinsicWidth()/2),
-marker.getIntrinsicHeight(),
(int) (marker.getIntrinsicWidth()/2),
0);
InterestingLocations funPlaces = new InterestingLocations(marker);
mapView.getOverlays().add(funPlaces);
GeoPoint pt = funPlaces.getCenterPt();
int latSpan = funPlaces.getLatSpanE6();
int lonSpan = funPlaces.getLonSpanE6();
Log.v("Overlays", "Lat span is " + latSpan);
Log.v("Overlays", "Lon span is " + lonSpan);
MapController mc = mapView.getController();
mc.setCenter(pt);
mc.zoomToSpan((int)(latSpan*1.5), (int)(lonSpan*1.5));
}
@Override
protected boolean isLocationDisplayed() {
return false;
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
class InterestingLocations extends ItemizedOverlay {
private ArrayList<OverlayItem> locations = new ArrayList<OverlayItem>();
private GeoPoint center = null;
public InterestingLocations(Drawable marker)
{
super(marker);
GeoPoint a = new GeoPoint((int)(38.418971*1000000),(int)(-11.581436*1000000));
GeoPoint b = new GeoPoint((int)(38.410067*1000000),(int)(-11.583699*1000000));
locations.add(new OverlayItem(a,"A", "A"));
locations.add(new OverlayItem(b,"B", "B"));
populate();
}
public GeoPoint getCenterPt() {
if(center == null) {
int northEdge = -90000000; // i.e., -90E6 microdegrees
int southEdge = 90000000;
int eastEdge = -180000000;
int westEdge = 180000000;
Iterator<OverlayItem> iter = locations.iterator();
while(iter.hasNext()) {
GeoPoint pt = iter.next().getPoint();
if(pt.getLatitudeE6() > northEdge) northEdge = pt.getLatitudeE6();
if(pt.getLatitudeE6() < southEdge) southEdge = pt.getLatitudeE6();
if(pt.getLongitudeE6() > eastEdge) eastEdge = pt.getLongitudeE6();
if(pt.getLongitudeE6() < westEdge) westEdge = pt.getLongitudeE6();
}
center = new GeoPoint((int)((northEdge + southEdge)/2),
(int)((westEdge + eastEdge)/2));
}
return center;
}
@Override
public void draw(Canvas canvas, MapView mapview, boolean shadow) {
// Here is where we can eliminate shadows by setting to false
super.draw(canvas, mapview, shadow);
}
@Override
protected OverlayItem createItem(int i) {
return locations.get(i);
}
@Override
public int size() {
return locations.size();
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<!-- This file is /res/layout/mapview.xml -->
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<com.google.android.maps.MapView android:id="@+id/mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:apiKey="yourMapKey"
/>
</RelativeLayout>
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