mapbox-issues

• The first project MainActivityAsyncImageLoading.kt shows a common use-case for asynchronous image-generation with mapbox.
• The second project MainActivityClusteringGlitch.kt demos a glitch we experience when panning clustered Geojson sources

Building

Please rename api_keys.sample.properties into api_keys.properties and fill in the relevant tokens.

The problem: async-image-loading

• Start up the demo application.MainActivityAsyncImageLoading.kt
• The app will render a map and will immediately add some data points in a horizontal line along the equator.
• Those data points will have dynamic image identifiers the Mapbox renderer will not be able to find in the style.
• The onStyleImageMissing callback is invoked with those identifiers.
• Since we need to do some heavy computation + network requests in order to render those images, we offload the rendering of the Bitmaps to a background thread.
• We also do not initially know the size of those icons.
• After the computation completes, we want to add the image to the map via addImage
• Here we encounter the problem: The images are added to the map successfully, but they are not rendered until a layout pass happens for some other reason (pinch gesture)

The problem: clustering

• Start up the demo application. MainActivityClusteringGlitch.kt
• Observe the fading clusters when crossing the screen bounds