getting-started-framevents

MainActivity.kt

private val frameCallback = object : Choreographer.FrameCallback {
   override fun doFrame(currentTime: Long) {
       choreographer.postFrameCallback(this)
       modelViewer.render(currentTime)
   }
}

override fun onResume() {
   super.onResume()
   choreographer.postFrameCallback(frameCallback)
}

override fun onPause() {
   super.onPause()
   choreographer.removeFrameCallback(frameCallback)
}

override fun onDestroy() {
   super.onDestroy()
   choreographer.removeFrameCallback(frameCallback)
}