Android05_下拉滚动事件OnScrollListener
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1.OnScrollListener 下拉滚动的那个操作的继承代码:(摘抄,可以研究)
public interface OnScrollListener {
//滚动下拉的接口
/**
* The view is not scrolling. Note navigating the list using the trackball counts as
* being in the idle state since these transitions are not animated.
*/
public static int SCROLL_STATE_IDLE = 0;
/**
* The user is scrolling using touch, and their finger is still on the screen
*/
public static int SCROLL_STATE_TOUCH_SCROLL = 1;
/**
* The user had previously been scrolling using touch and had performed a fling. The
* animation is now coasting to a stop
*/
public static int SCROLL_STATE_FLING = 2;
/**
* Callback method to be invoked while the list view or grid view is being scrolled. If the
* view is being scrolled, this method will be called before the next frame of the scroll is
* rendered. In particular, it will be called before any calls to
* {@link Adapter#getView(int, View, ViewGroup)}.
*
* @param view The view whose scroll state is being reported
*
* @param scrollState The current scroll state. One of {@link #SCROLL_STATE_IDLE},
* {@link #SCROLL_STATE_TOUCH_SCROLL} or {@link #SCROLL_STATE_IDLE}.
*/
public void onScrollStateChanged(AbsListView view, int scrollState);
/**
* Callback method to be invoked when the list or grid has been scrolled. This will be
* called after the scroll has completed
* @param view The view whose scroll state is being reported
* @param firstVisibleItem the index of the first visible cell (ignore if
* visibleItemCount == 0)
* @param visibleItemCount the number of visible cells
* @param totalItemCount the number of items in the list adaptor
*/
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount,
int totalItemCount);
}
/**
* The top-level view of a list item can implement this interface to allow
* itself to modify the bounds of the selection shown for that item.
*/
2.今天学习学到了一个很重要的东西,就是相信自己,一定要相信自己,不能看高别人——“在战略上要藐视对手,在战术上要正视对手”;因为今天我自己又独立地解决了bug,因为我自己知道这个bug我是不可能解决的,所以我一直不敢相信自己能够做好,所以我就不想自己独立地解决,但是同时也有个问题,就是我不敢、不好意思问老师。,我感觉我的问题太简单了,所以不能问老师,问了老师老师就会很生气地说我问题太多,事实上也是的哦。我上课没有认真,所以就不能做好,以后上课得自己先理解,不理解永远不会懂得。
3.今天学的,那个实线分界线,以及颜色的设置是这样地代码:—— android:divider="#FF0000"颜色, android:dividerHeight="2dp"实线的厚度
4.weight是占的比重:如果这俩个在一个横框里:则android:layout_weight="1",(占了四分之一);android:layout_weight="3"(占了四分之三)。
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