sphereView.kt

class FrescoSphericalPanoramaView(context: Context, attrs: AttributeSet) : SphericalPanoramaView(context: Context, attrs: AttributeSet) {
  private val multiDraweeHolder: MultiDraweeHolder<GenericDraweeHierarchy> = MultiDraweeHolder()

  fun bindTo(tileUris: List<Uri>) = post {
    multiDraweeHolder.clear()
    val imagesSetter = getImagesSetter(...)

    tileUris.forEachIndexed { index, uri ->
      val holder = DraweeHolder.create(GenericDraweeHierarchyBuilder(resources).build(), context)
      val imageRequest = ImageRequestBuilder.newBuilderWithSource(uri)
          .setPostprocessor(object : BasePostprocessor() {
            override fun process(bitmap: Bitmap) {
              imagesSetter.setImageToSector(index, bitmap)
            }
          })
          .build()
      holder.controller = Fresco.newDraweeControllerBuilder()
          .setOldController(holder.controller)
          .setImageRequest(imageRequest)
          .build()
      holder.topLevelDrawable.callback = this
      multiDraweeHolder.add(holder)
    }
  }

  @SuppressLint("MissingSuperCall")
  override fun verifyDrawable(who: Drawable): Boolean = multiDraweeHolder.verifyDrawable(who)

  public override fun onDetachedFromWindow() {
    super.onDetachedFromWindow()
    multiDraweeHolder.onDetach()
  }

  override fun onStartTemporaryDetach() {
    super.onStartTemporaryDetach()
    multiDraweeHolder.onDetach()
  }

  public override fun onAttachedToWindow() {
    super.onAttachedToWindow()
    multiDraweeHolder.onAttach()
  }

  override fun onFinishTemporaryDetach() {
    super.onFinishTemporaryDetach()
    multiDraweeHolder.onAttach()
  }
}