RecyclerView:禁用由于焦点更改而导致的滚动 [英] RecyclerView: Disable scrolling caused by change in focus

问题描述

TL; DR 我的RecyclerView是EditText s.当用户将焦点放在EditText #1上并点击EditText #2时，我希望EditText #2获得焦点，但是我不想ReyclerView滚动.我该如何实现?

TL;DR I have a RecyclerView of EditTexts. When the user is focused on EditText #1 and taps on EditText #2, I want EditText #2 to get focus but I don't want the ReyclerView to scroll. How can I achieve this?

我正在尝试使用填充有一堆EditText的RecyclerView.当我专注于一个EditText并单击另一个时，RecyclerView滚动，以便第二个在屏幕顶部.我想从RecyclerView禁用此自动滚动，但是我仍然希望用户能够滚动，并且我仍然希望第二个EditText专注于此，以便用户可以开始键入.我该如何实现?

I'm trying to work with a RecyclerView populated with a bunch of EditTexts. When I'm focused on one EditText and I click on another, the RecyclerView scrolls so that the second is at the top of the screen. I want to disable this auto-scrolling from the RecyclerView, but I still want the user to be able to scroll, and I still want the second EditText to be focused on so the user can start typing. How can I achieve this?

我已经尝试了以下解决方案:

I've already tried the following solutions:

• https://stackoverflow.com/a/8101614/4077294 ，但带有RecyclerView.OnItemTouchListener .我在onInterceptTouchEvent中叫recyclerView.requestFocusFromTouch.

• https://stackoverflow.com/a/8101614/4077294, but with a RecyclerView.OnItemTouchListener. I called recyclerView.requestFocusFromTouch in onInterceptTouchEvent.

• 行为:一直滚动到被点击的EditText顶部.

• Behavior: Scrolled to the top of the tapped EditText all the time.

通过

从任何EditText集中焦点时清除焦点

Clearing the focus from any EditText whenever it was focused on, via

editText.setOnFocusChangeListener(new OnFocusChangeListener() {
    @Override
    public void onFocusChange(View v, bool hasFocus) {
        if (hasFocus) {
            v.clearFocus();
        }
    }
});

• 行为:键盘从不显示，并且RecyclerView仍滚动到顶部.
• Behavior: The keyboard never showed up, and the RecyclerView still scrolled to the top.

如此问题一样，完全禁用滚动是不可接受的，因为我仍然希望用户可以滚动.

Disabling scrolling altogether as in this question is not acceptable because I still want the user to be able to scroll.

推荐答案

我最终得到了@pskink的以下解决方案:

I ended up with this solution from @pskink:

recylerView.setLayoutManager(new LinearLayoutManager(this) {
    @Override
    public boolean requestChildRectangleOnScreen(RecyclerView parent, View child, Rect rect, boolean immediate) {
        return false;
    }
});

这似乎工作得很好，但是@pskink提到使用箭头键时可能会出现问题.他在此处发布了另一个解决方案: https://pastebin.com/8JLSMkF7 .如果您对上述解决方案有疑问，可以在链接上尝试其他解决方案.现在，我坚持只在这里发布的那篇.

It seems to work perfectly, but @pskink has mentioned that this could have problems when using arrow keys. He's posted another solution here: https://pastebin.com/8JLSMkF7. If you have problems with the above solution, you may try the alternative solution at the link. For now, I'm sticking with the one I just posted here.

更新

自支持库v25.3.0起，您还应该覆盖另一个

Since support-library v25.3.0 you should also override another requestChildRectangleOnScreen method in LayoutManager:

@Override
public boolean requestChildRectangleOnScreen(RecyclerView parent, View child, Rect rect, boolean immediate, boolean focusedChildVisible) {
    return false;
}

这篇关于RecyclerView:禁用由于焦点更改而导致的滚动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！