Skip to main content
GuidesAPI ReferenceExamplesFAQ

Migrate to 2.12.0

|

This guide outlines the breaking changes introduced in SDK version 2.12.0. Required updates may vary depending on your use case.

Additionally, new features and bug fixes have been introduced and are not documented here. For a comprehensive list of changes, please refer to the changelog.

This release adds important changes related to position, position service, data sources, sense and provides the foundation for adding more sense related features in the future releases.

GemPosition class has been transformed into an interface​

The constructor and toJson/fromJson methods have been removed. In order to instantiate objects use the newly provided SenseDataFactory class.

Before:

GemPosition position = GemPosition();

Now:

GemPosition position = SenseDataFactory.producePosition(); // This method also takes optional parameters

roadModifiers and speedLimit getters from the GemPosition have been moved to the GemImprovedPosition interface​

A separate GemImprovedPosition interface has been added to better differentiate between map-matched and non-map-matched positions. The roadModifiers and speedLimit getters have been moved to the newly added interface.

Before:

GemPosition position = ...
Set<RoadModifier> position.roadModifiers;
double limit = position.speedLimit;

After:

GemImprovedPosition improvedPosition = ...
Set<RoadModifier> improvedPosition.roadModifiers;
double limit = improvedPosition.speedLimit;

In order to get a GemImprovedPosition instance:

  • Use the addImprovedPositionListener callback from the PositionService class
  • Use the getImprovedPosition method of the PositionService class
  • Cast a GemPosition/SenseData variable to a GemImprovedPosition if the value of type GemImprovedPosition has been upcasted to one of the parent types
  • Use the getLatestData on a DataSource object that supports map-matched positions (the DataType.improvedPosition value is found within the list returned by the availableDataTypes getter). The value returned by getLatestData needs to be upcasted to GemImprovedPosition

The addImprovedPositionListener method of the PositionService class registers a callback that takes a GemImprovedPosition parameter instead of GemPosition​

This:

PositionService.instance.addImprovedPositionListener((GemPosition position) {
    // Do operation with GemPosition
});

Becomes:

PositionService.instance.addImprovedPositionListener((GemImprovedPosition position) {
    // Do operation with GemImprovedPosition
});

Note: The GemImprovedPosition extends GemPosition with additional features. Even though using this method with the GemPosition type still works (and the value can be later downcasted into a map-matched position), the GemImprovedPosition provides additional values such as roadModifiers and speedLimit.

Deprecated timestamp getter from the GemPosition interface​

As an additional time value has been added to the GemPosition interface, the old timestamp has been deprecated and the satelliteTime was added to better reflect the meaning of the value.

Before:

GemPosition position = ...
DateTime timestamp = position.timestamp;

Now:

GemPosition position = ...
DateTime timestamp = position.satelliteTime;

The old timestamp getter will be removed in a future release.

The pushData method of the DataSource class now takes a single required SenseData parameter instead of optional ExternalAccelerationData and ExternalPositionData​

The pushData method no longer accepts ExternalPositionData values as parameters. These can be converted into GemPosition (which extend SenseData) using the newly added SenseDataFactory class.

This:

ExternalPositionData externalPosition = ExternalPositionData(
    timestamp: DateTime.now().millisecondsSinceEpoch,
    latitude: 36,
    longitude: 40,
    altitude: 10,
    heading: 26,
    speed: 3,
);

dataSource.pushData(positionData: externalPosition);

Becomes:

ExternalPositionData externalPosition = ExternalPositionData(
    timestamp: DateTime.now().millisecondsSinceEpoch,
    latitude: 36,
    longitude: 40,
    altitude: 10,
    heading: 26,
    speed: 3,
);

dataSource.pushData(SenseDataFactory.positionFromExternalData(externalPosition));

The startRecording method of the Recorder class is now async and needs to be awaited​

Not awaiting the startRecording method might lead into unexpected and unpredictable behaviour.

This:

Recorder recorder = Recorder.create(recorderConfig);
GemError error = recorder.startRecording();

Becomes:

Recorder recorder = Recorder.create(recorderConfig);
GemError error = await recorder.startRecording();
Last updated on