我试图从当listItems中的滚动速度快,setOnScrollListener不工作
http://javatechig.com/android/listview-header-parallax-with-sticky-view-in-android
实现本教程中介绍的粘头列表视图的问题是,当我滚动列表速度非常快,头不列入根据需要移动到屏幕顶部。
我试着用以下方法记录topY和heroTopY的值。
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
/* Check if the first item is already reached to top.*/
if (view.getFirstVisiblePosition() == 0) {
View firstChild = listView.getChildAt(0);
topY = 0;
if (firstChild != null) {
topY = firstChild.getTop();
Log.d("topY", "" + topY);
}
heroTopY = stickyViewSpacer.getTop();
Log.e("heroTopY", "" + heroTopY);
Log.d("topY,heroTopY", topY + "," + heroTopY);
stickyView.setY(Math.max(0, heroTopY + topY));
// Set the image to scroll half of the amount that of ListView
heroImageView.setY(topY * 0.5f);
}
}
日志输出是:
09-01 17:35:23.692 19530-19530/com.javatechig.parallaxlistview D/topY﹕ 0
09-01 17:35:23.692 19530-19530/com.javatechig.parallaxlistview E/heroTopY﹕ 500
09-01 17:35:23.692 19530-19530/com.javatechig.parallaxlistview D/topY,heroTopY﹕ 0,500
09-01 17:35:23.856 19530-19530/com.javatechig.parallaxlistview D/topY﹕ -29
09-01 17:35:23.856 19530-19530/com.javatechig.parallaxlistview E/heroTopY﹕ 500
09-01 17:35:23.856 19530-19530/com.javatechig.parallaxlistview D/topY,heroTopY﹕ -29,500
09-01 17:35:23.873 19530-19530/com.javatechig.parallaxlistview D/topY﹕ -72
09-01 17:35:23.873 19530-19530/com.javatechig.parallaxlistview E/heroTopY﹕ 500
09-01 17:35:23.873 19530-19530/com.javatechig.parallaxlistview D/topY,heroTopY﹕ -72,500
09-01 17:35:23.892 19530-19530/com.javatechig.parallaxlistview D/topY﹕ -84
09-01 17:35:23.892 19530-19530/com.javatechig.parallaxlistview E/heroTopY﹕ 500
09-01 17:35:23.892 19530-19530/com.javatechig.parallaxlistview D/topY,heroTopY﹕ -84,500
如从日志输出的TOPY值获得stucked在84等的报头所示。 如何解决这个??任何解决方案将是有益的!
在'onScroll'的开头添加'Log.e' – pskink
使用'if(view.getFirstVisiblePosition()== 0){}',只有当您到达顶部时,才会移动您的'stickyView'你想要什么? – Rami
@Rami,先生,这里是视频https://youtu.be/eyWDkwVnYxo的链接。我希望实现标题** Heading1 **作为listview的第一项到达屏幕顶部时保持顶部,如果滚动缓慢完成,则其工作正常。但如果快速滚动** Heading1 **视图不会移动到顶部! – Nischal