Android™ Application Development - Bahar Ali Khan

}
Chapter 7: Maps, Geocoding, and Location-Based Services
do {
Double lat;
lat = earthquakes.getFloat(EarthquakeProvider.LATITUDE_COLUMN) * 1E6;
Double lng;
lng = earthquakes.getFloat(EarthquakeProvider.LONGITUDE_COLUMN) * 1E6;
GeoPoint geoPoint = new GeoPoint(lng.intValue(), lat.intValue());
quakeLocations.add(geoPoint);
} while(earthquakes.moveToNext());
5.3. Call refreshQuakeLocations from the Overlay’s constructor. Also register a
DataSetObserver on the results Cursor that refreshes the Earthquake Location
list if a change in the Earthquake Cursor is detected.
public EarthquakeOverlay(Cursor cursor) {
super();
earthquakes = cursor;
}
quakeLocations = new ArrayList();
refreshQuakeLocations();
earthquakes.registerDataSetObserver(new DataSetObserver() {
@Override
public void onChanged() {
refreshQuakeLocations();
}
});
5.4. Complete the EarthquakeOverlay by overriding the draw method to iterate
over the list of GeoPoints, drawing a marker at each earthquake location. In this
example, a simple red circle is drawn, but it could easily be modifi ed to include
additional information, such as by adjusting the size of each circle based on the
magnitude of the quake.
int rad = 5;
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
Projection projection = mapView.getProjection();
// Create and setup your paint brush
Paint paint = new Paint();
paint.setARGB(250, 255, 0, 0);
paint.setAntiAlias(true);
paint.setFakeBoldText(true);
if (shadow == false) {
for (GeoPoint point : quakeLocations) {
Point myPoint = new Point();
projection.toPixels(point, myPoint);
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