getting-started-oncreate

MainActivity.kt

private lateinit var surfaceView: SurfaceView
private lateinit var choreographer: Choreographer
private lateinit var modelViewer: ModelViewer

override fun onCreate(savedInstanceState: Bundle?) {
   super.onCreate(savedInstanceState)
   surfaceView = SurfaceView(this).apply { setContentView(this) }
   choreographer = Choreographer.getInstance()
   modelViewer = ModelViewer(surfaceView)
   surfaceView.setOnTouchListener(modelViewer)
}