CODEWITHSUNDEEP
androidlabelmapboxmapbox-marker
Jake Madden
Jake Madden

Reputation: 237

Android Mapbox Marker Labels

I'm trying to figure out how to make a dynamically generated list of markers display a dynamic text label on the map (not in the infoWindow). I know it's possible because I've used this feature in Mapbox Studio - I just can't figure out how to do it on Android! I considered creating a static Bitmap icon with the text incorporated, but that doesn't seem very flexible compared to the Mapbox Studio version, so I'd like to avoid it if I can! Any suggestions?

Upvotes: 2

Views: 2743

Answers (1)

langsmith
langsmith

Reputation: 2546

You're trying to do what's called data-driven styling

You should use a SymbolLayer to show text on a map. If the text you want to show is based on GeoJSON Features in your data set, then use the get expression in the textField property of a SymbolLayer.

FeatureCollection featureCollection = FeatureCollection.fromFeatures();
GeoJsonSource geoJsonSource = new GeoJsonSource("source-id", featureCollection);
mapboxMap.addSource(geoJsonSource);

SymbolLayer symbolLayer = new SymbolLayer("layer-id", "source-id")
  .withProperties(PropertyFactory.textField(Expression.get("FEATURE-PROPERTY-KEY")));
mapboxMap.addLayer(symbolLayer);

The Annotation Plugin simplifies some of this. Also for reference to see how SymbolLayers are used, there is the Mapbox Android demo app.

Upvotes: 5

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