我正在使用 ViewPager2，最新版本'androidx.viewpager2:viewpager2:1.0.0-beta04'
我有 10 页，每页都是片段。
如果我设置viewpager2.offscreenPageLimit = 1
我必须滚动到第 5 页才能使第一页销毁。
发生了什么事？？？，当我滚动到第 3 页时，第一页应该被破坏吧？？
然后我尝试另一种方法来使它正确
(viewpager2.getChildAt(0) as RecyclerView).layoutManager?.isItemPrefetchEnabled = false
(viewpager2.getChildAt(0) as RecyclerView).setItemViewCacheSize(1)
这样，当我滚动到第 3 页时，第一页将被销毁，它现在正在工作
谁能向我解释这两个属性之间的区别，好吗？
非常感谢
/**
* Sets whether the LayoutManager should be queried for views outside of
* its viewport while the UI thread is idle between frames.
*
* <p>If enabled, the LayoutManager will be queried for items to inflate/bind in between
* view system traversals on devices running API 21 or greater. Default value is true.</p>
*
* <p>On platforms API level 21 and higher, the UI thread is idle between passing a frame
* to RenderThread and the starting up its next frame at the next VSync pulse. By
* prefetching out of window views in this time period, delays from inflation and view
* binding are much less likely to cause jank and stuttering during scrolls and flings.</p>
*
* <p>While prefetch is enabled, it will have the side effect of expanding the effective
* size of the View cache to hold prefetched views.</p>
*
* @param enabled <code>True</code> if items should be prefetched in between traversals.
*
* @see #isItemPrefetchEnabled()
*/
(viewpager2.getChildAt(0) as RecyclerView).layoutManager?.isItemPrefetchEnabled = false
/**
* Set the number of offscreen views to retain before adding them to the potentially shared
* {@link #getRecycledViewPool() recycled view pool}.
*
* <p>The offscreen view cache stays aware of changes in the attached adapter, allowing
* a LayoutManager to reuse those views unmodified without needing to return to the adapter
* to rebind them.</p>
*
* @param size Number of views to cache offscreen before returning them to the general
* recycled view pool
*/
(viewpager2.getChildAt(0) as RecyclerView).setItemViewCacheSize(0)