我試圖從當listItems中的滾動速度快,setOnScrollListener不工作
http://javatechig.com/android/listview-header-parallax-with-sticky-view-in-android
實現本教程中介紹的粘頭列表視圖的問題是,當我滾動列表速度非常快,頭不列入根據需要移動到屏幕頂部。
我試着用以下方法記錄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);
}
}
日誌輸出是:
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
如從日誌輸出的TOPY值獲得stucked在84等的報頭所示。 如何解決這個??任何解決方案將是有益的!
在'onScroll'的開頭添加'Log.e' – pskink
使用'if(view.getFirstVisiblePosition()== 0){}',只有當您到達頂部時,纔會移動您的'stickyView'你想要什麼? – Rami
@Rami,先生,這裏是視頻https://youtu.be/eyWDkwVnYxo的鏈接。我希望實現標題** Heading1 **作爲listview的第一項到達屏幕頂部時保持頂部,如果滾動緩慢完成,則其工作正常。但如果快速滾動** Heading1 **視圖不會移動到頂部! – Nischal