键盘打开时相应向上滚动 RecyclerView

问题描述

我创建了一个聊天活动，就像 facebook messenger，底部有一个 EditText，上面是消息的 RecyclerView.当键盘打开时，我想向上滚动 RecyclerView 到底应该向上滚动多少.更具体地说，假设 RecyclerView 中有 5 条消息，当前第三条消息就在 EditText 的上方.因此，当键盘打开时，我想像以前一样将第三条消息保留在 EditText 上方.我已经搜索但找不到.如果这是一个重复的问题，如果有人可以提供链接，我将不胜感激.

I have created a chat activity and like facebook messenger, there is an EditText at the bottom and above is the RecyclerView of messages. When Keyboard opens, I want to scroll RecyclerView up exactly how much it should scroll up. To be more specific, lets assume there are 5 messages in the RecyclerView and currently 3rd message is just above the EditText. So when keyboard is open, I want to keep 3rd message just above the EditText like before. I have searched but could not find. If this is a duplicate question, I will be grateful if anyone can provide the link.

推荐答案

recyclerView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
        @Override
        public void onLayoutChange(View view, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
            if ( bottom < oldBottom) {
                recyclerView.postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        recyclerView.scrollToPosition(adapter.getItemCount());
                    }
                }, 100);
            }
        }
    });

如果它不起作用使用 smoothScrollToPosition 而不是 scrollToPosition

if it not work Use smoothScrollToPosition instead of scrollToPosition

这对我有用.

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