滚动滚动视图时，滚动视图内自动滚动映射

Question

如何在滚动视图中自动滚动地图，如Expedia应用程序

Answer 1

找到解决办法了。首先创建自定义滚动视图。将mapview放在滚动视图中。然后在自定义滚动视图的onScrollChanged上滚动地图视图，

在CustomScrollView.java上：

protected void onScrollChanged(int l, int t, int oldl, int oldt) 
{
    super.onScrollChanged(l, t, oldl, oldt);
    scrollMap(l,t);
}

在YourActivity.java上：

public void scrollMap(int x, int y)
{
    int scrollLength = scrollView.getMeasuredHeight();
    int mapViewHeight = mapView.getMeasuredHeight();

    int mapViewCenter = (int)(mapViewHeight/2);
    int scrollMapHeight = (mapViewCenter + ((int)((mapViewHeight*y)/scrollLength)));

    scrollMapHeight = (int)((mapViewCenter - scrollMapHeight)/(1.5));

    if(scrollMapHeight<0)           
    mapView.scrollTo(x, scrollMapHeight);       
}