SwipeRefreshLayout干扰setOnScrollListener

Question

每次我向上或向下滚动列表时,我都会隐藏(或取消隐藏)某些视图OnScrollListener.这是附在我身上的代码ListView.

lv.setOnScrollListener(new OnScrollListener() {

            private int mLastFirstVisibleItem;
            private boolean mIsScrollingUp = true;
            private LinearLayout ll = (LinearLayout) getActivity()
                    .findViewById(R.id.llSearchPlaces);

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

            }

            @Override
            public void onScroll(AbsListView view, int firstVisibleItem,
                                 int visibleItemCount, int totalItemCount) {



                if (view.getId() == lv.getId()) {
                    final int currentFirstVisibleItem = lv
                            .getFirstVisiblePosition();
                    if (currentFirstVisibleItem > mLastFirstVisibleItem) {

                        if (mIsScrollingUp == true) {
                            mIsScrollingUp = false;
                             Log.i("a", "scrolling down...");

                            floatingActionButton.hide();

                            Animation animation = new TranslateAnimation(0, 0,
                                    0, 200);
                            animation.setDuration(300);
                            animation
                                    .setAnimationListener(new AnimationListener() {

                                        @Override
                                        public void onAnimationEnd(
                                                Animation animation) {
                                            ll.setVisibility(View.INVISIBLE);
                                        }

                                        @Override
                                        public void onAnimationRepeat(
                                                Animation animation) {
                                        }

                                        @Override
                                        public void onAnimationStart(
                                                Animation animation) {
                                        }
                                    });

                            ll.startAnimation(animation);
                        }

                    } else if (currentFirstVisibleItem < mLastFirstVisibleItem) {

                        if (mIsScrollingUp == false) {
                            mIsScrollingUp = true;
                            floatingActionButton.show();
                             Log.i("a", "scrolling up...");

                            Animation animation = new TranslateAnimation(0, 0,
                                    200, 0);
                            animation.setDuration(400);
                            animation
                                    .setAnimationListener(new AnimationListener() {

                                        @Override
                                        public void onAnimationEnd(
                                                Animation animation) {

                                        }

                                        @Override
                                        public void onAnimationRepeat(
                                                Animation animation) {

                                        }

                                        @Override
                                        public void onAnimationStart(
                                                Animation animation) {
                                            ll.setVisibility(View.VISIBLE);

                                        }
                                    });

                            ll.startAnimation(animation);

                        }
                    }

                    mLastFirstVisibleItem = currentFirstVisibleItem;

                }
            }
        });

布局:

<android.support.v4.widget.SwipeRefreshLayout
    android:id="@+id/swipe_refresh_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <ListView
        android:id="@id/android:list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fadeScrollbars="true"
        android:listSelector="#00000000"
        android:scrollbars="none" />

</android.support.v4.widget.SwipeRefreshLayout>

自从我添加了之后SwipeRefreshLayout,当我Log进入上面的监听器时,我什么都得不到.我怎样才能同时使用这两个项目？

编辑:好像这是我所需要的,但我不能让它仍然工作

作为那篇文章的一部分,我添加了这个onScroll,因为它似乎不起作用.

        if (firstVisibleItem == 0) {
            swipeLayout.setEnabled(true);
        } else {
            swipeLayout.setEnabled(false);
        }

编辑2:这是问题的核心:似乎该onScroll方法在活动首次启动时加载,列表加载,然后再次加载.

Answer 1

RecyclerView我对和 也有同样的问题ListView。向下滚动无论有多少项目，都不可能返回到列表顶部。

这将禁用SwipeRefreshLayout直到第一个可见项目或任何项目位置可见。您还可以沿此绑定不同的滚动侦听器。确保SwipeRefreshLayout在重新填充列表时启用（如果之前已禁用）。

public class SwipeRefreshLayoutToggleScrollListenerListView implements AbsListView.OnScrollListener {
    private List<AbsListView.OnScrollListener> mScrollListeners = new ArrayList<AbsListView.OnScrollListener>();
    private int mExpectedVisiblePosition = 0;

    public SwipeRefreshLayoutToggleScrollListenerListView(SwipeRefreshLayout mSwipeLayout) {
        this.mSwipeLayout = mSwipeLayout;
    }

    private SwipeRefreshLayout mSwipeLayout;
    public void addScrollListener(AbsListView.OnScrollListener listener){
        mScrollListeners.add(listener);
    }
    public boolean removeScrollListener(AbsListView.OnScrollListener listener){
        return mScrollListeners.remove(listener);
    }
    public void setExpectedFirstVisiblePosition(int position){
        mExpectedVisiblePosition = position;
    }

    private void notifyOnScrolled(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount){
        for(AbsListView.OnScrollListener listener : mScrollListeners){
            listener.onScroll(view, firstVisibleItem, visibleItemCount, totalItemCount);
        }
    }
    private void notifyScrollStateChanged(AbsListView view, int scrollState){
        for(AbsListView.OnScrollListener listener : mScrollListeners){
            listener.onScrollStateChanged(view, scrollState);
        }
    }

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

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        notifyOnScrolled(view, firstVisibleItem, visibleItemCount, totalItemCount);
        if(firstVisibleItem != RecyclerView.NO_POSITION)
            mSwipeLayout.setEnabled(firstVisibleItem == mExpectedVisiblePosition);
    }
}

编辑：

lv.setOnScrollListener(new SwipeRefreshLayoutToggleScrollListenerListView(mSwiperLayout){
   //override methods here, don't forget the super calls. 
});