ActivityOrFragment.kt

class ActivityOrFragment{
  
  private lateinit val shimmerLayout: ShimmerFrameLayout
  
   private fun initViews() {
        val shimmerLifeCycle = ShimmerLifeCycle(shimmerLayout)
        lifecycle.addObserver(shimmerLifeCycle)
    }
  
}

ShimmerLifeCycle.kt

import androidx.lifecycle.Lifecycle
import androidx.lifecycle.LifecycleObserver
import androidx.lifecycle.OnLifecycleEvent
import com.facebook.shimmer.ShimmerFrameLayout
import timber.log.Timber


class ShimmerLifeCycle (private val shimmerFrameLayout: ShimmerFrameLayout) : LifecycleObserver{

    var loading: Boolean = false

    @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
    fun stopShimmer(){
        Timber.d("Attempting to stop shimmer")
        if(shimmerFrameLayout.isShimmerStarted){
            Timber.d("Stopped shimmer...")
            shimmerFrameLayout.stopShimmer()
        }
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
    fun startShimmer(){
        Timber.d("Attempting to start shimmer")
        if(loading){
            Timber.d("Starting shimmer...")
            shimmerFrameLayout.startShimmer()
        }
    }

}