A util for updating RecyclerView while making sure LayoutManager's state is properly maintained through update operation, avoiding some 'Inconsistency Detected' errors

RecyclerViewUtils.kt

@file:JvmName("RecyclerViewUtils")

package com.ornoyman.core.ui.recyclerview

import android.support.v7.widget.RecyclerView
import io.reactivex.functions.Action

/**
 * Allows safely updating the backing data and notifying recycler view.
 * If adapter is currently in lockdown state, will post update action to avoid illegal state error.
 * Saves and restores scrolling state so hopefully updates will not result in
 * the dreaded 'Inconsistency detected' error.
 */
fun RecyclerView.safeUpdate(update: Action) = this.safeUpdate(update::run)

/**
 * Allows safely updating the backing data and notifying recycler view.
 * If adapter is currently in lockdown state, will post update action to avoid illegal state error.
 * Saves and restores scrolling state so hopefully updates will not result in
 * the dreaded 'Inconsistency detected' error.
 */
inline fun RecyclerView.safeUpdate(crossinline update: () -> Unit) {
  val safeUpdate = createSafeUpdate(update)
  if (!isComputingLayout) safeUpdate() else post { safeUpdate() }
}

inline fun RecyclerView.createSafeUpdate(crossinline update: () -> Unit): () -> Unit {
  return {
    val state = layoutManager?.onSaveInstanceState()
    update()
    layoutManager?.onRestoreInstanceState(state)
  }
}

Kotlin Usage
private fun updateRecyclerView(rv: RecyclerView, data: List<MyData>) { rv.safeUpdate { adapter.setData(data) } }

Java Usage
private void updateRecyclerView(RecyclerView rv, List<MyData> data) { RecyclerViewUtils.safeUpdate(rv, () -> adapter.setData(data)) }