当用户通过按“后退"按钮返回活动时，如何保持列表视图的位置? [英] How can I maintain the position of listview when user comes back to the activity by pressing back button?

问题描述

我有一个 listview ，当我转到另一个活动(通过启动另一个意图)然后返回时如何保持我的 ListView 在我的活动中的位置(按返回按​​钮)?当用户单击 listview 中的任何项目时，另一个活动开始，并且在该活动中，当按下上一个 listview 活动时，我有一个后退按钮，其状态恢复为点击了吗?我已经搜索了，但是没有找到有用的东西，并且有什么办法可以在清单中做到这一点，因为我在 listview 活动清单中使用了以下代码来恢复其状态，并且我知道它不是恢复状态的好选择方向改变后，但对我而言很有用.

I have a listview and How can I maintain the position of my ListView in my activity when I go to another activity (by launching another intent) and then come back (press the back button)? when user click on any item in the listview another activity started and in that activity I have a back button when it pressed the previous listview activity restores its state with item position that was clicked ? I have searched but nothing useful is found and Is there any way to do that in manifest because I used below code in the listview activity manifest to restore its state and I know its not a good choice to restore state after orientation changes but in my case that was useful.

android:configChanges="orientation|screenSize"

推荐答案

kotlin方式

val index: Int = recyclerView.scrollState
 
recyclerView.scrollToPosition(index)

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