在我的应用程序我得到某种动作条的上方和下方的列表视图活动。我想要做的是什么 - 是与列表中滚动起来，所以它隐藏，然后，当列表被向下滚动 - 它应该向下滚动的列表，就像是刚刚超过上屏幕边框。我怎样才能实现这一功能？

In my application I got an activity with some kind of actionbar at the top and the listview below it. What I want to do - is to scroll it UP with the list, so it hides and then, when the list is being scrolled down - it should scroll down with the list, like it was just over the upper screen border. how can i achieve this functionality?

推荐答案

谷歌现在支持这种使用 CoordinatorLayout 。

Updated 6/3/2015:

Google now supports this using the CoordinatorLayout.

<android.support.design.widget.AppBarLayout
    android:id="@+id/appbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
        app:layout_scrollFlags="scroll|enterAlways" />

    <android.support.design.widget.TabLayout
        android:id="@+id/tabs"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</android.support.design.widget.AppBarLayout>

<android.support.v4.view.ViewPager
    android:id="@+id/viewpager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="end|bottom"
    android:layout_margin="@dimen/fab_margin"
    android:src="@drawable/ic_done" />

来源： https://github.com/chrisbanes/cheesesquare/blob/master/app/src/main/res/layout/include_list_viewpager.xml

https://github.com/umano/AndroidSlidingUpPanel

看看在code。在这个仓库。当你滑动面板了，在动作条滑好了。

Take a look at the code in this repository. As you slide the panel up, the ActionBar slides up as well.

从演示

   getWindow().requestFeature(Window.FEATURE_ACTION_BAR_OVERLAY);

   SlidingUpPanelLayout layout = (SlidingUpPanelLayout) findViewById(R.id.sliding_layout);
    layout.setShadowDrawable(getResources().getDrawable(R.drawable.above_shadow));
    layout.setAnchorPoint(0.3f);
    layout.setPanelSlideListener(new PanelSlideListener() {
        @Override
        public void onPanelSlide(View panel, float slideOffset) {
            Log.i(TAG, "onPanelSlide, offset " + slideOffset);
            if (slideOffset < 0.2) {
                if (getActionBar().isShowing()) {
                    getActionBar().hide();
                }
            } else {
                if (!getActionBar().isShowing()) {
                    getActionBar().show();
                }
            }
        }

        @Override
        public void onPanelExpanded(View panel) {
            Log.i(TAG, "onPanelExpanded");

        }

        @Override
        public void onPanelCollapsed(View panel) {
            Log.i(TAG, "onPanelCollapsed");

        }

        @Override
        public void onPanelAnchored(View panel) {
            Log.i(TAG, "onPanelAnchored");

        }
    });

下载例子在这里：

https://play.google.com/store/apps/details?id=com.sothree.umano

我最近想的相同的功能，这完美的作品对我来说：

I recently wanted the same functionality and this works perfectly for me:

当用户滚动向上，在ActionBar将隐藏在为了给用户整个屏幕一起工作的工作。

As the user scrolls upward, the ActionBar will be hidden in order to give the user the entire screen to work work with.

随着用户向下滚动，并让走，动作条会回来。

As the user scrolls downward and lets go, the ActionBar will return.

getWindow().requestFeature(Window.FEATURE_ACTION_BAR_OVERLAY);

listView.setOnScrollListener(new OnScrollListener() {
    int mLastFirstVisibleItem = 0;

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {   }           

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {    
        if (view.getId() == listView.getId()) {
            final int currentFirstVisibleItem = listView.getFirstVisiblePosition();

            if (currentFirstVisibleItem > mLastFirstVisibleItem) {
                // getSherlockActivity().getSupportActionBar().hide();
                getSupportActionBar().hide();
            } else if (currentFirstVisibleItem < mLastFirstVisibleItem) {
                // getSherlockActivity().getSupportActionBar().show();
                getSupportActionBar().show();
            }

            mLastFirstVisibleItem = currentFirstVisibleItem;
        }               
    }
});

RecyclerView - 无库

    this.mRecyclerView.setOnScrollListener(new RecyclerView.OnScrollListener() {
        int mLastFirstVisibleItem = 0;

        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        }

        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);
            final int currentFirstVisibleItem = mLinearLayoutManager.findFirstVisibleItemPosition();

            if (currentFirstVisibleItem > this.mLastFirstVisibleItem) {
                MainActivity.this.getSupportActionBar().hide();
            } else if (currentFirstVisibleItem < this.mLastFirstVisibleItem) {
                MainActivity.this.getSupportActionBar().show();
            }

            this.mLastFirstVisibleItem = currentFirstVisibleItem;
        }
    });

让我知道如果你需要帮助了！

Let me know if you need anymore help!