diff --git a/recyclerview-adapters/src/main/java/ru/touchin/adapters/SimpleDataObserver.kt b/recyclerview-adapters/src/main/java/ru/touchin/adapters/SimpleDataObserver.kt
new file mode 100644
index 0000000..97fc0c6
--- /dev/null
+++ b/recyclerview-adapters/src/main/java/ru/touchin/adapters/SimpleDataObserver.kt
@@ -0,0 +1,23 @@
+package ru.touchin.adapters
+
+import androidx.recyclerview.widget.RecyclerView
+
+abstract class SimpleDataObserver : RecyclerView.AdapterDataObserver() {
+
+    abstract fun onChange()
+
+    override fun onItemRangeChanged(positionStart: Int, itemCount: Int) = onChange()
+
+    override fun onItemRangeInserted(positionStart: Int, itemCount: Int) = onChange()
+
+    override fun onItemRangeRemoved(positionStart: Int, itemCount: Int) = onChange()
+
+    override fun onItemRangeMoved(fromPosition: Int, toPosition: Int, itemCount: Int) = onChange()
+
+}
+
+fun RecyclerView.Adapter<out RecyclerView.ViewHolder>.onDataUpdatedAndDrawn(onChanged: () -> Unit) = registerAdapterDataObserver(
+        object : SimpleDataObserver() {
+            override fun onChange() = onChanged()
+        }
+)