avoid the view that contains adapter leak memory

ViewExtension.kt

ffun View.traverseAdapterView() {
	depthSearchViewGroup()
		.forEach { viewGroup ->
			clearAdapterReference(viewGroup)
		}
}

fun View.depthSearchViewGroup(): MutableList<ViewGroup> {
	val viewDeque = LinkedList<View>()
	val viewGroups = mutableListOf<ViewGroup>()
	var view = this
	viewDeque.push(view)
	while (!viewDeque.isEmpty()) {
		view = viewDeque.pop()
		if (view is ViewGroup) {
			viewGroups.add(view)
			for (childIndex in 0 until view.childCount) {
				val childView = view.getChildAt(childIndex)
				if (childView is ViewGroup) {
					viewDeque.push(childView)
				}
			}
		}
	}
	return viewGroups
}

fun View.depthSearchView(): MutableList<View> {
	val viewDeque = LinkedList<View>()
	val views = mutableListOf<View>()
	var view = this
	viewDeque.push(view)
	while (!viewDeque.isEmpty()) {
		view = viewDeque.pop()
		if (view is ViewGroup) {
			for (childIndex in 0 until view.childCount) {
				val childView = view.getChildAt(childIndex)
				if (childView is ViewGroup) {
					viewDeque.push(childView)
				} else {
					views.add(childView)
				}
			}
		}
	}
	return views
}

private fun clearAdapterReference(viewGroup: ViewGroup): Boolean {
	when (viewGroup) {
		is RecyclerView -> {
			viewGroup.clearReference()
			return true
		}
		is ViewPager -> {
			viewGroup.clearReference()
			return true
		}
		is ViewPager2 -> {
			viewGroup.clearReference()
			return true
		}
	}
	return false
}

/**
 * Remove the adapter after the view has been detached from window in order to prevent memory leaks.
 */
fun ViewPager.clearReference() {
	addOnAttachStateChangeListener(object : View.OnAttachStateChangeListener {
		override fun onViewAttachedToWindow(v: View?) {

		}

		override fun onViewDetachedFromWindow(v: View?) {
			this@clearReference.adapter = null
			removeOnAttachStateChangeListener(this)
		}
	})
}

fun ViewPager2.clearReference() {
	addOnAttachStateChangeListener(object : View.OnAttachStateChangeListener {
		override fun onViewAttachedToWindow(v: View?) {

		}

		override fun onViewDetachedFromWindow(v: View?) {
			this@clearReference.adapter = null
			removeOnAttachStateChangeListener(this)
		}
	})
}

/**
 * Remove the adapter after the view has been detached from window in order to prevent memory leaks.
 */
fun RecyclerView.clearReference() {
	addOnAttachStateChangeListener(object : View.OnAttachStateChangeListener {
		override fun onViewAttachedToWindow(v: View?) {

		}

		override fun onViewDetachedFromWindow(v: View?) {
			this@clearReference.adapter = null
			removeOnAttachStateChangeListener(this)
		}
	})
}

if activity or fragment use any view which contains adapter.when the adapter as a filed like this:

class Activity{
val someAdapter = ...
fun onCreate(){
recycler.adapter = someAdapter
}
}

you will leak the container.
I wrote a solved method this should call onDestory() or other destroy methods

tracing-simple-memory-leak-around-recyclerview-using-leakcanary