Example of usage WorldWindKotlin on Android

WorldWindKotlin-example-android.kt

/**
 * Creates a simple view of a globe with touch navigation and a few layers.
 */
open class BasicGlobeActivity: Activity() {
    /**
     * The WorldWindow (GLSurfaceView) maintained by this activity
     */
    override lateinit var wwd: WorldWindow

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        // Establish the activity content
        setContentView(R.layout.activity_globe)

        // Create the WorldWindow (a GLSurfaceView) which displays the globe.
        wwd = WorldWindow(this)

        // Add the WorldWindow view object to the layout that was reserved for the globe.
        val globeLayout = findViewById<FrameLayout>(R.id.globe)
        globeLayout.addView(wwd)

        // Setting up the WorldWindow's layers.
        with(wwd.engine.layers) {
            addLayer(BackgroundLayer())
            addLayer(BlueMarbleLandsatLayer().apply {
                configureCache(File(cacheDir, "cache.gpkg").absolutePath, "BMLS")
            })
            addLayer(AtmosphereLayer())
        }

        // Setting up the WorldWindow's elevation coverages.
        wwd.engine.globe.elevationModel.addCoverage(BasicElevationCoverage().apply {
            configureCache(File(cacheDir, "cache.gpkg").absolutePath, "SRTM")
        })
    }

    override fun onPause() {
        super.onPause()
        wwd.onPause() // pauses the rendering thread
    }

    override fun onResume() {
        super.onResume()
        wwd.onResume() // resumes a paused rendering thread
    }

    override fun onLowMemory() {
        super.onLowMemory()
        // Reduce cache size on low memory
        wwd.engine.renderResourceCache.trimStale()
    }
}