Problem: Chapter 8 "Mapping Earthquakes Example" (Page 282)

DrGaribaldi · June 18th, 2010, 02:31 AM

In Step 5.2, which shows the implementation of the refreshQuakeLocations() method, contains the following code:

Code:

Double lat =
   earthquakes.getFloat(EarthquakeProvider.LATITUDE_COLUMN) * 1E6;
Double lng =
   earthquakes.getFloat(EarthQuakeProvider.LONGITUDE_COLUMN) * 1E6;

GeoPoint geoPoint = new GeoPoint(lng.intValue(),
                                 lat.intValue());

However, looking at the API documentation for GeoPoint ( http://code.google.com/android/add-o.../GeoPoint.html ) I see that the parameters to the constructor are (latitude, longitude) not (longitude, latitude).

The code should be updated as follows:

Code:

GeoPoint geoPoint = new GeoPoint(lat.intValue(),
                                 lng.intValue());

The code on the publisher's web site also contains this error.

DrGaribaldi · June 18th, 2010, 03:00 AM

Also, in Step 5.1, the signature for EarthquakeOverlay constructor is:

Code:

public EarthquakeOverlay(Cursor cursor, ContentResolver resolver)

However, in Step 6 when an instance of the EarthquakeOverlay class is instantiated, the code shows:

Code:

EarthquakeOverlayou eo = new EarthquakeOverlay(earthquakeCursor);

Note that only one parameter is passed to the constructor. Looking at the code available on the publisher's web site, I see the constructor signature has been updated to read:

Code:

public EarthquakeOverlay(Cursor cursor)

DrGaribaldi · June 18th, 2010, 03:10 AM

Also, in Step 6, the earthquakeURI variable is declared to be of type String:

Code:

String earthquakeURI = EarthquakeProvider.CONTENT_URI;

However, the type of EarthquakeProvider.CONTENT_URI is Uri (android.net.Uri).

The code on the publisher's web site reflects this change.

dbomberg · July 29th, 2010, 06:24 PM

Quote:

Originally Posted by DrGaribaldi

Also, in Step 6, the earthquakeURI variable is declared to be of type String:

Code:

String earthquakeURI = EarthquakeProvider.CONTENT_URI;

However, the type of EarthquakeProvider.CONTENT_URI is Uri (android.net.Uri).

The code on the publisher's web site reflects this change.

Thank you DrGarabaldi, please keep those fixes coming!