检查底部是否达到了scrollview的方法

Question

我有这个代码，我在getChildCount()和最后一行上得到2个错误。

protected void onScrollChanged(int l, int t, int oldl, int oldt) 
{
        // Grab the last child placed in the ScrollView, we need it to determinate the bottom position.
        View view = (View) getChildAt(getChildCount()-1);

        // Calculate the scrolldiff
        int diff = (view.getBottom()-(view.getHeight()+view.getScrollY()));

        // if diff is zero, then the bottom has been reached
        if( diff == 0 )
        {
                // notify that we have reached the bottom
                Log.d("Hier", "MyScrollView: Bottom has been reached" );
        }
        super.onScrollChanged(l, t, oldl, oldt);
}

Answer 1

通常在滚动更改ListView上的工作..

因此，当您在listview的监听器中调用

时，GetChildView（）将无法工作

您可以在侦听器外部尝试此方法，并使用侦听器内的值...