当 ExpandableListView 获得焦点时，处理子项选择的正确方法是什么？
我有一个 ExpandableListView 以及一些其他可以将焦点放在其右侧的控件。像这样的东西。注意：选择 Child2。
Group1
Child1 +-----------------------+
*Child2* | |
Child3 | Other focusable View. |
Child4 | |
Child5 +-----------------------+
使用方向键，如果我按向右，焦点就会转到另一个视图。此时，如果我按方向键上的向左键，焦点将返回到我的 ExpandableListView，但 Child3 会被选中，而不是 Child2（因为它位于中心）。
一般来说，当焦点离开然后返回到我的 ExpandableListView 时，如何确保先前选定的子项仍然是选定的子项？关于解决方法有什么想法吗？我尝试缓存当前选择，然后调用 setChildSelected()，但由于某种原因，选择没有发生。
I have an ExpandableListView and then some other control that can have focus to the right of it. Something like this. Note: Child2 is selected.
Group1
Child1 +-----------------------+
*Child2* | |
Child3 | Other focusable View. |
Child4 | |
Child5 +-----------------------+
Using the d-pad, if I press right, focus goes to the other view. At that point if I press left on the d-pad, focus returns to my ExpandableListView, but Child3 gets selected instead of Child2 (because it's in the center).
In general, how can I ensure that the previously selected child remains the selected child when focus leaves and then returns to my ExpandableListView? Any ideas on a work around? I tried caching the current selection then calling setChildSelected(), but for some reason the selection doesn't happen.
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好吧，我通过在失去焦点时缓存当前组和子项来解决这个问题，然后在列表视图重新获得焦点时显式地重新设置组/子项。我还必须禁用列表视图并在不同的地方重新启用它。这是一个 hack，但它确实有效。
Well, I solved it by caching the current group and child when focus is lost and then explicitly re-setting the group / child when the listview re-gains focus. I had to also disable the listview and re-enable it in various places. It's a hack, but it works.