当我们滚动到Android回收器视图中的最后一个位置时通知

Question

我的应用程序有一个水平滚动的回收器视图。我想在滚动列表并到达最后一个位置时触发另一个事件。

Answer 1

只需在回收器视图上实现一个addOnScrollListener((。然后在滚动侦听器中实现以下代码。

RecyclerView.OnScrollListener mScrollListener = new RecyclerView.OnScrollListener() {
    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        if (mIsLoading)
            return;
        int visibleItemCount = mLayoutManager.getChildCount();
        int totalItemCount = mLayoutManager.getItemCount();
        int pastVisibleItems = mLayoutManager.findFirstVisibleItemPosition();
        if (pastVisibleItems + visibleItemCount >= totalItemCount) {
            //End of list
        }
    }
};

Answer 2

 private RecyclerView.OnScrollListener nRecyclerViewOnScrollListener = new RecyclerView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState);
    }
    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        int visibleItemCount = notificationLayoutManager.getChildCount();
        int totalItemCount = notificationLayoutManager.getItemCount();
        int firstVisibleItemPosition = notificationLayoutManager.findFirstVisibleItemPosition();
        if ((visibleItemCount + firstVisibleItemPosition) >= totalItemCount) {
            nLoadMoreItems();
        }
    }
};
private void nLoadMoreItems() {
    if (defaultCurrentPage < defaultpageCount)
        layout_load_more_loadingNotification.setVisibility(View.VISIBLE);
    int pageCount = (defaultCurrentPage + 1);
   //fetch second page data
      }

试试吧

Answer 3

看到所有答案后，我通过这样做来解决我的问题，

 private RecyclerView.OnScrollListener nRecyclerViewOnScrollListener = new RecyclerView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState);
        if (newState == 2) {
            try {
                if (lastVisibleItemPosition + 1 == totalItemCount) {
                    //Write you code here
                }
            } catch (Exception e) {
                e.printStackTrace();
                Log.i(TAG, e.getMessage());
            }
        }
    }
    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        totalItemCount = mLayoutManager.getItemCount();
        lastVisibleItemPosition = ((LinearLayoutManager) recyclerView.getLayoutManager()).findLastCompletelyVisibleItemPosition();
    }
};

将侦听器添加到回收器视图

recyclerView.addOnScrollListener(nRecyclerViewOnScrollListener);