如何清除 ListView 的 RecycleBin 中的视图? [英] How to clear the views which are held in the ListView's RecycleBin?

问题描述

在 Android 的 ListView 小部件中，ListView 将保存从内部类 getView 方法获得的视图>回收站.

In Android's ListView widget, the ListView will hold the views which is got from getView method of an Adapter in a inner class RecycleBin.

如何清除 RecycleBin 中的视图并强制 ListView 重新创建所有子视图.

How can I clear the views in the RecycleBin and force the ListView to recreate all the child views.

推荐答案

如果我没记错的话，在 ListView 小部件上调用 invalidate 将清空 Views.由于潜在的性能问题，我建议不要清空 ListView 的视图缓存.

If I remember correctly a call to invalidate on a ListView widget will empty the cache of Views which are currently stored. I would advise against emptying the cache of views of a ListView because of the potential performance issues.

如果您不打算使用 convertView 项，那么您最终将不得不每次都构建行视图(导致每次用户滚动时构建大量对象)+ 被来自 RecycleBin 的回收视图占用的额外内存，无论如何都不会被使用.

If you're not going to use the convertView item then you'll end up with having to build the row view each time(resulting in a lot of objects constructed each time the user scrolls) + the extra memory occupied by the recycled views from the RecycleBin which will never be used anyway.

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