如何在滚动的Recycler视图上与协调器父级一起显示/隐藏FAB [英] how to show/hide FAB on scroll Recycler view with coordinator parent

问题描述

我有一个带有协调器布局的活动.内部活动中有一个带有Recycler视图和浮动按钮的片段.当滚动Recycler视图时如何显示/隐藏浮动按钮并避免使用fab行为?！

I have an activity with coordinator layout.inside activity there is a fragment with Recycler view and float button.how can I show/hide float button when Scroll Recycler view and avoid to use fab behavior?!

在活动布局中: CoordinatorLayout -----> AppBarLayout ---->工具栏和FrameLayout以及底部栏视图

in activity layout: CoordinatorLayout----->AppBarLayout---->Toolbar and FrameLayout and Bottom bar view

在片段布局中: RelativeLayout ---->回收站视图和浮动按钮

in fragment layout: RelativeLayout---->Recycler view and float button

我想实现Google+主页之类的功能. 我该如何实现这种情况?

I want to implement something like Google+ home page. how can I implement this scenario?

在我的片段中通过接口使用活动的协调器布局，并使用fab行为显示/隐藏fab ...直到找到更好的解决方案！！！

using coordinator layout of activity by interface in my fragment and show/hide fab with fab behavior ... until I find better solution!!!

推荐答案

此代码可以正常工作:

 mRecycler.addOnScrollListener(new RecyclerView.OnScrollListener() {
                @Override
                public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                    if(dy > 0){
                        mFab.hide();
                    } else{
                        mFab.show();
                    }

                    super.onScrolled(recyclerView, dx, dy);
                }
            });

您不能这样做:

app:layout_anchor="@id/listView"
app:layout_anchorGravity="bottom|end"

在此处中查找:

不支持CoordinatorLayout内置的支持 根据此Google帖子的ListView.

There is no support built-in for CoordinatorLayout to work with ListView according to this Google post.

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