blocks|key|2904010|text|谷歌的ItemTouchHelper实现假设每个刷出的项目最终都会从回收器视图中删除，而在某些应用程序中可能并非如此。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|2904011|RecoverAnimation是ItemTouchHelper中的一个嵌套类，用于管理滑动/拖动项目的触摸动画。虽然名称暗示它只恢复项目的位置，但它实际上是唯一一个用于恢复(取消滑动/拖动)和+replace+(滑动时移出或拖动时替换)项目的类。奇怪的名字。|2904012|在RecoverAnimation中有一个名为mIsPendingCleanup的布尔型属性，ItemTouchHelper使用它来判断项目是否等待删除。因此，在将RecoverAnimation附加到项目之后，ItemTouchHelper会在成功移出后设置此属性，并且只要设置了此属性，动画就不会从恢复动画列表中删除。问题是，将始终为刷出的项目设置mIsPendingCleanup，导致该项目的RecoverAnimation永远不会从动画列表中删除。因此，即使你在成功滑动后恢复了项目的位置，只要你触摸它，它就会被送回被刷出的位置-因为RecoverAnimation将导致动画从最新的被刷出的位置开始。|2904013|不幸的是，解决方案是将ItemTouchHelper类源代码复制到与support库中相同的包中，并从RecoverAnimation类中删除mIsPendingCleanup属性。我不确定这是否被谷歌接受，我还没有在Play+Store上发布更新，看看它是否会导致拒绝，但你可以在https://gist.github.com/kukabi/f46e1c0503d2806acbe2找到支持库v22.2.1的类源代码，上面提到的修复。|2904014|entityMap|0|LINK|mutability|MUTABLE|url|https://gist.github.com/kukabi/f46e1c0503d2806acbe2^0|3|F|M|2|0|0|G|H|F|2O|1|0|1|G|N|H|1B|F|2A|G|2Y|F|4W|H|5K|G|0|B|F|1F|G|1Z|H|3X|1F|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|Z|8|@$9|10|A|11|B|C]|$9|12|A|13|B|C]|$9|14|A|15|B|D]]|E|@]|F|$]]|$1|I|3|J|5|6|7|16|8|@$9|17|A|18|B|C]|$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]|$9|1F|A|1G|B|C]|$9|1H|A|1I|B|C]|$9|1J|A|1K|B|C]]|E|@]|F|$]]|$1|K|3|L|5|6|7|1L|8|@$9|1M|A|1N|B|C]|$9|1O|A|1P|B|C]|$9|1Q|A|1R|B|C]]|E|@$9|1S|A|1T|1|1U]]|F|$]]|$1|M|3|-4|5|6|7|1V|8|@]|E|@]|F|$]]]|N|$O|$5|P|Q|R|F|$S|T]]]]

Google's <code>ItemTouchHelper</code> implementation assumes that every swiped out item will eventually get removed from the recycler view, whereas it might not be the case in some applications.

<code>RecoverAnimation</code> is a nested class in <code>ItemTouchHelper</code> that manages the touch animation of the swiped/dragged items. Although the name implies that it only recovers the position of items, it's actually the only class that is used to recover (cancel swipe/drag) and replace (move out on swipe or replace on drag) items. Strange naming.

There's a boolean property named <code>mIsPendingCleanup</code> in <code>RecoverAnimation</code>, which <code>ItemTouchHelper</code> uses to figure out whether the item is pending removal. So <code>ItemTouchHelper</code>, after attaching a <code>RecoverAnimation</code> to the item, sets this property after a successful swipe out, and the animation does not get removed from the list of recover animations as long as this property is set. The problem is that, <code>mIsPendingCleanup</code> will always be set for a swiped out item, causing the <code>RecoverAnimation</code> for the item to never be removed from the list of animations. So even if you recover the item's position after a successul swipe, it will be sent back to the swiped-out position as soon as you touch it - because the RecoverAnimation will cause the animation start from the latest swiped-out position.

Solution to this is unfortunately to copy the <code>ItemTouchHelper</code> class source code into the same package as it is in the support library, and remove the <code>mIsPendingCleanup</code> property from the <code>RecoverAnimation</code> class. I'm not sure if this is acceptable by Google, and I haven't posted the update to Play Store yet to see whether it will cause a reject, but you may find the class source code from support library v22.2.1 with the above mentioned fix at <a href="https://gist.github.com/kukabi/f46e1c0503d2806acbe2">https://gist.github.com/kukabi/f46e1c0503d2806acbe2</a>.

blocks|key|2691946|text|经过一些随机的尝试，我找到了一个解决方案。在您的适配器上调用notifyItemChanged。这将使刷出的视图动画回到其原始位置。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2691947|entityMap^0|U|H|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

After some random poking I found a solution. Call <code>notifyItemChanged</code> on you adapter. This will make the swiped out view animate back into it's original position.

blocks|key|2691967|text|在您的适配器上调用notifyDataSetChanged以使向后滑动的工作一致|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2691968|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Call notifyDataSetChanged on your adapter to make the swipe back work consistent

blocks|key|131555|text|您应该在ItemTouchHelper.Callback中重写onSwiped方法并刷新该特定项。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|131556|+@Override
+public+void+onSwiped(RecyclerView.ViewHolder+viewHolder,
+++++int+direction)+{
+++++adapter.notifyItemChanged(viewHolder.getAdapterPosition());
+}|code-block|syntax|javascript|131557|entityMap^0|4|O|V|8|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

You should override <code>onSwiped</code> method in <code>ItemTouchHelper.Callback</code> and refresh that particular item.

<pre><code> @Override
 public void onSwiped(RecyclerView.ViewHolder viewHolder,
 int direction) {
 adapter.notifyItemChanged(viewHolder.getAdapterPosition());
 }
</code></pre>

blocks|key|131061|text|在使用LiveData向ListAdapter提供列表的情况下，调用notifyItemChanged不起作用。然而，我发现了一个笨拙的变通方法，需要在onSwiped回调中将ItemTouchHelper重新附加到回收器视图|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|131062|val+recyclerView+=+someRecyclerViewInYourCode

var+itemTouchHelper:+ItemTouchHelper?+=+null

val+itemTouchCallback+=+object+:+ItemTouchHelper.Callback+{
++++override+fun+onSwiped(viewHolder:+RecyclerView.ViewHolder,+direction:Int)+{
++++++++itemTouchHelper?.attachToRecyclerView(null)
++++++++itemTouchHelper?.attachToRecyclerView(recyclerView)
++++}
}

itemTouchHelper+=+ItemTouchHelper(itemTouchCallback)

itemTouchHelper.attachToRecyclerView(recyclerView)|code-block|syntax|javascript|131063|entityMap^0|3|8|C|B|Y|H|24|8|2G|F|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|L|$]]

In the case of using <code>LiveData</code> to provide a list to a <code>ListAdapter</code>, calling <code>notifyItemChanged</code> does not work. However, I found a fugly workaround which involves re-attaching the <code>ItemTouchHelper</code> to the recycler view in <code>onSwiped</code> callback as such

<pre><code>val recyclerView = someRecyclerViewInYourCode

var itemTouchHelper: ItemTouchHelper? = null

val itemTouchCallback = object : ItemTouchHelper.Callback {
 override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction:Int) {
 itemTouchHelper?.attachToRecyclerView(null)
 itemTouchHelper?.attachToRecyclerView(recyclerView)
 }
}

itemTouchHelper = ItemTouchHelper(itemTouchCallback)

itemTouchHelper.attachToRecyclerView(recyclerView)

</code></pre>

blocks|key|128438|text|对于最新的anndroidX包，我仍然有这个问题，所以我需要稍微调整@jimmy0251解决方案来正确地重置项目(他的解决方案只适用于第一次滑动)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|128439|+override+fun+onSwiped(viewHolder:+RecyclerView.ViewHolder,+direction:+Int)+{
++++++++++++++++clipAdapter.notifyItemChanged(viewHolder.adapterPosition)
++++++++++++++++itemTouchHelper.startSwipe(viewHolder)
++++++++++++}|code-block|syntax|javascript|128440|请注意，startSwipe()会正确地重置项目的恢复动画。|offset|length|style|CODE|128441|entityMap^0|0|0|4|C|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

With the latest anndroidX packages I still have this issue, so I needed to adjust @jimmy0251 solution a bit to reset the item correctly (his solution would only work for the first swipe).

<pre><code> override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
 clipAdapter.notifyItemChanged(viewHolder.adapterPosition)
 itemTouchHelper.startSwipe(viewHolder)
 }
</code></pre>

Note that <code>startSwipe()</code> resets the item's recovery animations correctly.

blocks|key|2692030|text|onSwiped从不调用，始终恢复|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2692031|override+fun+getSwipeThreshold(viewHolder:+RecyclerView.ViewHolder):+Float+{
++++return+1f
}
override+fun+getSwipeEscapeVelocity(defaultValue:+Float):+Float+{
++++return+Float.MAX_VALUE
}|code-block|syntax|javascript|2692032|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

onSwiped never call, always revert

<pre><code>override fun getSwipeThreshold(viewHolder: RecyclerView.ViewHolder): Float {
 return 1f
}
override fun getSwipeEscapeVelocity(defaultValue: Float): Float {
 return Float.MAX_VALUE
}
</code></pre>

blocks|key|2692045|text|@ПавелКарпычев解决方案实际上几乎是正确的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2692046|notifyItemChanged的问题是它做了额外的动画，并且可能与onDraw中的装饰重叠，所以要做一个干净的后退，这就是你可以做的：|offset|length|style|CODE|2692047|public+class+SimpleSwipeCallback+extends+ItemTouchHelper.SimpleCallback+{

++++boolean+swipeOutEnabled+=+true;
++++int+swipeDir+=+0;

++++public+SimpleSwipeCallback()+{
++++++++super(0,+ItemTouchHelper.RIGHT+%7C+ItemTouchHelper.LEFT);
++++}

++++@Override
++++public+boolean+onMove(@NonNull+RecyclerView+recyclerView,+@NonNull+RecyclerView.ViewHolder+viewHolder,+@NonNull+RecyclerView.ViewHolder+target)+{
++++++++return+false;
++++}

++++@Override
++++public+void+onSwiped(@NonNull+RecyclerView.ViewHolder+viewHolder,+int+swipeDir)+{
++++++++//Do+action
++++}

++++@Override
++++public+void+onChildDraw(Canvas+c,+RecyclerView+recyclerView,
++++++++++++++++++++++++++++RecyclerView.ViewHolder+viewHolder,
++++++++++++++++++++++++++++float+dx,+float+dy,+int+actionState,+boolean+isCurrentlyActive)+{

++++++++++++//check+if+it+should+swipe+out
++++++++++++boolean+shouldSwipeOut+=+//TODO;
++++++++++++if+(actionState+==+ItemTouchHelper.ACTION_STATE_SWIPE+&&+(!shouldSwipeOut)+{
++++++++++++++++swipeOutEnabled+=+false;

++++++++++++++++//Limit+swipe
++++++++++++++++int+maxMovement+=+recyclerView.getWidth()+/+3;

++++++++++++++++//swipe+right+:+left
++++++++++++++++float+sign+=+dx+>+0+?+1+:+-1;

++++++++++++++++float+limitMovement+=+Math.min(maxMovement,+sign+*+dx);+//+Only+move+to+maxMovement

++++++++++++++++float+displacementPercentage+=+limitMovement+/+maxMovement;

++++++++++++++++//limited+threshold
++++++++++++++++boolean+swipeThreshold+=+displacementPercentage+==+1;

++++++++++++++++//+Move+slower+when+getting+near+the+middle
++++++++++++++++dx+=+sign+*+maxMovement+*+(float)+Math.sin((Math.PI+/+2)+*+displacementPercentage);

++++++++++++++++if+(isCurrentlyActive)+{
++++++++++++++++++++int+dir+=+dx+>+0+?+ItemTouchHelper.RIGHT+:+ItemTouchHelper.LEFT;
++++++++++++++++++++swipeDir+=+swipeThreshold+?+dir+:+0;
++++++++++++++++}
++++++++++++}+else+{
++++++++++++++++swipeOutEnabled+=+true;
++++++++++++}

+++++++++//do+decoration

++++++++super.onChildDraw(c,+recyclerView,+viewHolder,+dx,+dy,+actionState,+isCurrentlyActive);
++++}

++++@Override
++++public+float+getSwipeEscapeVelocity(float+defaultValue)+{
++++++++return+swipeOutEnabled+?+defaultValue+:+Float.MAX_VALUE;
++++}

++++@Override
++++public+float+getSwipeVelocityThreshold(float+defaultValue)+{
++++++++return+swipeOutEnabled+?+defaultValue+:+0;
++++}

++++@Override
++++public+float+getSwipeThreshold(RecyclerView.ViewHolder+viewHolder)+{
++++++++return+swipeOutEnabled+?+0.6f+:+1.0f;
++++}

++++@Override
++++public+void+clearView(@NonNull+RecyclerView+recyclerView,+@NonNull+RecyclerView.ViewHolder+viewHolder)+{
++++++++super.clearView(recyclerView,+viewHolder);

++++++++if+(swipeDir+!=+0)+{
++++++++++++onSwiped(viewHolder,+swipeDir);
++++++++++++swipeDir+=+0;
++++++++}
++++}
}|code-block|syntax|javascript|2692048|请注意，根据shouldSwipeOut的不同，这将启用正常滑动("swipeOut")或有限滑动|2692049|entityMap^0|0|0|H|Z|6|0|0|6|E|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@$D|S|E|T|F|G]|$D|U|E|V|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|W|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|O|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|P|$]]

@Павел Карпычев solution is actually almost correct
the problem with <code>notifyItemChanged</code> is that it does additional animations and might overlap with the decorations from <code>onDraw</code>, so to do just a clean slide back, thats what you can do:
<pre><code>public class SimpleSwipeCallback extends ItemTouchHelper.SimpleCallback {

 boolean swipeOutEnabled = true;
 int swipeDir = 0;

 public SimpleSwipeCallback() {
 super(0, ItemTouchHelper.RIGHT | ItemTouchHelper.LEFT);
 }

 @Override
 public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
 return false;
 }

 @Override
 public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int swipeDir) {
 //Do action
 }

 @Override
 public void onChildDraw(Canvas c, RecyclerView recyclerView,
 RecyclerView.ViewHolder viewHolder,
 float dx, float dy, int actionState, boolean isCurrentlyActive) {

 //check if it should swipe out
 boolean shouldSwipeOut = //TODO;
 if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE &amp;&amp; (!shouldSwipeOut) {
 swipeOutEnabled = false;

 //Limit swipe
 int maxMovement = recyclerView.getWidth() / 3;

 //swipe right : left
 float sign = dx &gt; 0 ? 1 : -1;

 float limitMovement = Math.min(maxMovement, sign * dx); // Only move to maxMovement

 float displacementPercentage = limitMovement / maxMovement;

 //limited threshold
 boolean swipeThreshold = displacementPercentage == 1;

 // Move slower when getting near the middle
 dx = sign * maxMovement * (float) Math.sin((Math.PI / 2) * displacementPercentage);

 if (isCurrentlyActive) {
 int dir = dx &gt; 0 ? ItemTouchHelper.RIGHT : ItemTouchHelper.LEFT;
 swipeDir = swipeThreshold ? dir : 0;
 }
 } else {
 swipeOutEnabled = true;
 }

 //do decoration

 super.onChildDraw(c, recyclerView, viewHolder, dx, dy, actionState, isCurrentlyActive);
 }

 @Override
 public float getSwipeEscapeVelocity(float defaultValue) {
 return swipeOutEnabled ? defaultValue : Float.MAX_VALUE;
 }

 @Override
 public float getSwipeVelocityThreshold(float defaultValue) {
 return swipeOutEnabled ? defaultValue : 0;
 }

 @Override
 public float getSwipeThreshold(RecyclerView.ViewHolder viewHolder) {
 return swipeOutEnabled ? 0.6f : 1.0f;
 }

 @Override
 public void clearView(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
 super.clearView(recyclerView, viewHolder);

 if (swipeDir != 0) {
 onSwiped(viewHolder, swipeDir);
 swipeDir = 0;
 }
 }
}
</code></pre>
Note that this enables either a normal swipe (&quot;swipeOut&quot;) or a limited swipe, depending on <code>shouldSwipeOut</code>

blocks|key|131091|text|由于大多数ItemTouchHelper成员都有一个私有包访问修饰符，并且我们不希望仅仅为了更改一行而复制一个2000行的类，因此让我们将包指向androidx.recyclerview.widget。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|131092|当滑动发生时(mCallback.onSwiped)，我们可以恢复滑动视图的初始状态。mCallback.onSwiped仅从postDispatchSwipe方法调用，因此在此之后，我们注入视图还原(recoverOnSwiped)，它将从滑动的视图中清除任何滑动的效果和动画。|131093|@file:Suppress("PackageDirectoryMismatch")

package+androidx.recyclerview.widget

import+android.annotation.SuppressLint

/**
+*+[ItemTouchHelper]+with+recover+viewHolder's+itemView+from+clean+up
+*/
class+RecoveredItemTouchHelper(callback:+Callback,+private+val+withRecover:+Boolean+=+true)+:+ItemTouchHelper(callback)+{

++++private+fun+recoverOnSwiped(viewHolder:+RecyclerView.ViewHolder)+{
++++++++//+clear+any+swipe+effects+from+[viewHolder]
++++++++endRecoverAnimation(viewHolder,+false)
++++++++if+(mPendingCleanup.remove(viewHolder.itemView))+{
++++++++++++mCallback.clearView(mRecyclerView,+viewHolder)
++++++++}
++++++++if+(mOverdrawChild+==+viewHolder.itemView)+{
++++++++++++mOverdrawChild+=+null
++++++++++++mOverdrawChildPosition+=+-1
++++++++}
++++++++viewHolder.itemView.requestLayout()
++++}

++++@Suppress("DEPRECATED_IDENTITY_EQUALS")
++++@SuppressLint("VisibleForTests")
++++internal+override+fun+postDispatchSwipe(anim:+RecoverAnimation,+swipeDir:+Int)+{
++++++++//+wait+until+animations+are+complete.
++++++++mRecyclerView.post(object+:+Runnable+{
++++++++++++override+fun+run()+{
++++++++++++++++if+(mRecyclerView+!=+null+&&+mRecyclerView.isAttachedToWindow
++++++++++++++++++++&&+!anim.mOverridden
++++++++++++++++++++&&+(anim.mViewHolder.absoluteAdapterPosition+!==+RecyclerView.NO_POSITION)
++++++++++++++++)+{
++++++++++++++++++++val+animator+=+mRecyclerView.itemAnimator
++++++++++++++++++++//+if+animator+is+running+or+we+have+other+active+recover+animations,+we+try
++++++++++++++++++++//+not+to+call+onSwiped+because+DefaultItemAnimator+is+not+good+at+merging
++++++++++++++++++++//+animations.+Instead,+we+wait+and+batch.
++++++++++++++++++++if+((animator+==+null+%7C%7C+!animator.isRunning(null))
++++++++++++++++++++++++&&+!hasRunningRecoverAnim()
++++++++++++++++++++)+{
++++++++++++++++++++++++mCallback.onSwiped(anim.mViewHolder,+swipeDir)
++++++++++++++++++++++++if+(withRecover)+{
++++++++++++++++++++++++++++//+recover+swiped
++++++++++++++++++++++++++++recoverOnSwiped(anim.mViewHolder)
++++++++++++++++++++++++}
++++++++++++++++++++}+else+{
++++++++++++++++++++++++mRecyclerView.post(this)
++++++++++++++++++++}
++++++++++++++++}
++++++++++++}
++++++++})
++++}
}|code-block|syntax|javascript|131094|entityMap^0|5|F|20|S|0|7|I|17|I|1R|H|2T|F|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|N|$]]

Since most of the <code>ItemTouchHelper</code> members have a private-package access modifier, and we don't want to copy a 2000 line class just to change one line, let's point our package as <code>androidx.recyclerview.widget</code>.
When a swipe occurs (<code>mCallback.onSwiped</code>), we can restore the initial state of the swiped view.
<code>mCallback.onSwiped</code> is only called from the <code>postDispatchSwipe</code> method, so after that we inject our view restore (<code>recoverOnSwiped</code>), which clears any swiped effects and animation from the swiped view.
<pre class="lang-kotlin prettyprint-override"><code>@file:Suppress(&quot;PackageDirectoryMismatch&quot;)

package androidx.recyclerview.widget

import android.annotation.SuppressLint

/**
 * [ItemTouchHelper] with recover viewHolder's itemView from clean up
 */
class RecoveredItemTouchHelper(callback: Callback, private val withRecover: Boolean = true) : ItemTouchHelper(callback) {

 private fun recoverOnSwiped(viewHolder: RecyclerView.ViewHolder) {
 // clear any swipe effects from [viewHolder]
 endRecoverAnimation(viewHolder, false)
 if (mPendingCleanup.remove(viewHolder.itemView)) {
 mCallback.clearView(mRecyclerView, viewHolder)
 }
 if (mOverdrawChild == viewHolder.itemView) {
 mOverdrawChild = null
 mOverdrawChildPosition = -1
 }
 viewHolder.itemView.requestLayout()
 }

 @Suppress(&quot;DEPRECATED_IDENTITY_EQUALS&quot;)
 @SuppressLint(&quot;VisibleForTests&quot;)
 internal override fun postDispatchSwipe(anim: RecoverAnimation, swipeDir: Int) {
 // wait until animations are complete.
 mRecyclerView.post(object : Runnable {
 override fun run() {
 if (mRecyclerView != null &amp;&amp; mRecyclerView.isAttachedToWindow
 &amp;&amp; !anim.mOverridden
 &amp;&amp; (anim.mViewHolder.absoluteAdapterPosition !== RecyclerView.NO_POSITION)
 ) {
 val animator = mRecyclerView.itemAnimator
 // if animator is running or we have other active recover animations, we try
 // not to call onSwiped because DefaultItemAnimator is not good at merging
 // animations. Instead, we wait and batch.
 if ((animator == null || !animator.isRunning(null))
 &amp;&amp; !hasRunningRecoverAnim()
 ) {
 mCallback.onSwiped(anim.mViewHolder, swipeDir)
 if (withRecover) {
 // recover swiped
 recoverOnSwiped(anim.mViewHolder)
 }
 } else {
 mRecyclerView.post(this)
 }
 }
 }
 })
 }
}
</code></pre>

Is there a way to revert a swipe action and restore the view holder to its initial position after the swipe is completed and <code>onSwiped</code> is called on the <code>ItemTouchHelper.Callback</code> instance? I got the <code>RecyclerView</code>, <code>ItemTouchHelper</code> and <code>ItemTouchHelper.Callback</code> instances to work together perfectly, I just need to revert the swipe action and not remove the swiped item in some cases.

Android RecyclerView ItemTouchHelper revert swipe and restore view holder

在滑动完成并在ItemTouchHelper.Callback实例上调用onSwiped之后，有没有一种方法可以恢复滑动操作并将视图定位符恢复到其初始位置？我让RecyclerView、ItemTouchHelper和ItemTouchHelper.Callback实例完美地协同工作，我只需要还原swipe动作，在某些...

问Android RecyclerView ItemTouchHelper恢复滑动和恢复视窗
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问Android RecyclerView ItemTouchHelper恢复滑动和恢复视窗
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