Geolocation

The Geolocation class can be used to register events that get the geographical position of the device with a timestamp.

Instruction:

Creating the geolocation object. This must attach to our website in order to listen to events:

// Wir befinden uns gerade im Konstruktor einer View
final Geolocation geolocation = new Geolocation(this);

After that we can register our listeners:

// Gibt die Latitude und Longitude in der Konsole aus
geolocation.addPositionListener(position -> {
  final Coordinates coordinates = position.getCoords();
  System.out.println(String.format("Coordinates: lat=%f, long=%f", coordinates.getLatitude(), coordinates.getLongitude()));
});

// Gebe die Fehlermeldung aus, falls etwas nicht funktioniert
geolocation.addPositionErrorConsumer(error -> {
  System.err.println(error.getMessage());
});

If the position is to be output only once, getCurrentPosition(PositionOptions) can be called:
```
geolocation.getCurrentPosition(PositionOptions.Default());
```
To start listening to the position, watchPosition(PositionOptions) can be called:
```
geolocation.watchPosition(PositionOptions.Default());
```

Note:

Latitude, Longitude and Accuracy are always set.
Altitude, Altitude, Accuracy, Heading and Speed do not have to be set by the browser, so these values can also contain zero!