Question

可能重复：
How to trigger an event when scrollView reach the bottom with Android?

我已经尝试了一个小时左右来检测我的scrollView何时到达屏幕底部。由于各种屏幕尺寸和Android没有涉及的内容，我不能简单地说它在Y位置达到一定值时位于底部，但是没有方法可以检测到它在底部是否找到了。

我确信这有一个简单的解决方案，通过其他变量或其他东西减去视图的高度，但由于某种原因它只是没有点击我。任何想法都将不胜感激，谢谢。

Answer 1

试试这个：

@Override
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()-(getHeight()+getScrollY()));

    // if diff is zero, then the bottom has been reached
    if( diff == 0 )
    {
        // notify that we have reached the bottom
        Log.d(ScrollTest.LOG_TAG, "MyScrollView: Bottom has been reached" );
    }

    super.onScrollChanged(l, t, oldl, oldt);
}

要实现此功能，请展开ScrollView，然后覆盖onScrollChanged方法（继承自View）。

参考：Android: Understanding when ScrollView has reached the bottom

Android：当ScrollView触及底部时检测

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