Android™ Application Development - Bahar Ali Khan

}
}
break;
Chapter 6: Data Storage, Retrieval, and Sharing
+ where + ‘)’ : “”), whereArgs);
default: throw new IllegalArgumentException(“Unknown URI “ + uri);
getContext().getContentResolver().notifyChange(uri, null);
return count;
9. With the Content Provider fi nished, register it in the manifest by creating a new node within the
application tag.
Using the Provider
You can now update the Earthquake Activity to use the Earthquake Provider to store quakes, and use
them to populate the List View.
1. Within the Earthquake Activity, update the addNewQuake method. It should use the application’s
Content Resolver to insert each new earthquake into the provider. Move the existing
array control logic into a separate addQuakeToArray method.
private void addNewQuake(Quake _quake) {
ContentResolver cr = getContentResolver();
// Construct a where clause to make sure we don’t already have this
// earthquake in the provider.
String w = EarthquakeProvider.KEY_DATE + “ = “ +
_quake.getDate().getTime();
// If the earthquake is new, insert it into the provider.
Cursor c = cr.query(EarthquakeProvider.CONTENT_URI,
null, w, null, null);
int dbCount = c.getCount();
c.close();
if (dbCount > 0) {
ContentValues values = new ContentValues();
values.put(EarthquakeProvider.KEY_DATE,
_quake.getDate().getTime());
values.put(EarthquakeProvider.KEY_DETAILS, _quake.getDetails());
double lat = _quake.getLocation().getLatitude();
double lng = _quake.getLocation().getLongitude();
values.put(EarthquakeProvider.KEY_LOCATION_LAT, lat);
values.put(EarthquakeProvider.KEY_LOCATION_LNG, lng);
values.put(EarthquakeProvider.KEY_LINK, _quake.getLink());
values.put(EarthquakeProvider.KEY_MAGNITUDE,
_quake.getMagnitude());
cr.insert(EarthquakeProvider.CONTENT_URI, values);
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