找出ListView是否滚动到底部？

Question

我可以看看我的ListView是否滚动到底部？我的意思是最后一项是完全可见的.

Answer 1

编辑:

由于我在我的一个申请中一直在研究这个特定的主题,我可以为这个问题的未来读者写一个扩展的答案.

实现一个OnScrollListener,设置你ListView的onScrollListener,然后你应该能够正确处理事情.

例如:

private int preLast;
// Initialization stuff.
yourListView.setOnScrollListener(this);

// ... ... ...

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

    switch(lw.getId()) 
    {
        case R.id.your_list_id:     

            // Make your calculation stuff here. You have all your
            // needed info from the parameters of this function.

            // Sample calculation to determine if the last 
            // item is fully visible.
            final int lastItem = firstVisibleItem + visibleItemCount;

            if(lastItem == totalItemCount)
            {
                if(preLast!=lastItem)
                {
                    //to avoid multiple calls for last item
                    Log.d("Last", "Last");
                    preLast = lastItem;
                }
            }
    }
}

Answer 2

迟到的答案,但是如果您只是希望检查ListView是否一直向下滚动,而不创建事件监听器,则可以使用此if语句:

if (yourListView.getLastVisiblePosition() == yourListView.getAdapter().getCount() -1 &&
    yourListView.getChildAt(yourListView.getChildCount() - 1).getBottom() <= yourListView.getHeight())
{
    //It is scrolled all the way down here

}

首先,它检查最后一个可能的位置是否在视野中.然后它检查最后一个按钮的底部是否与ListView的底部对齐.你可以做类似的事情,知道它是否一直在顶部:

if (yourListView.getFirstVisiblePosition() == 0 &&
    yourListView.getChildAt(0).getTop() >= 0)
{
    //It is scrolled all the way up here

}

Answer 3

我这样做的方式:

listView.setOnScrollListener(new AbsListView.OnScrollListener() {

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE 
            && (listView.getLastVisiblePosition() - listView.getHeaderViewsCount() -
            listView.getFooterViewsCount()) >= (adapter.getCount() - 1)) {

        // Now your listview has hit the bottom
        }
    }

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

    }
});

Answer 4

有效的东西:

if (getListView().getLastVisiblePosition() == (adapter.items.size() - 1))

Answer 5

public void onScrollStateChanged(AbsListView view, int scrollState)        
{
    if (!view.canScrollList(View.SCROLL_AXIS_VERTICAL) && scrollState == SCROLL_STATE_IDLE)    
    {
        //When List reaches bottom and the list isn't moving (is idle)
    }
}

这对我有用.