ListView相关

一、listview 监听上滑还是下滑

[html] view plain copy

1. <span style="font-size:12px;">listView.setOnScrollListener(new AbsListView.OnScrollListener() {  
2.              @Override  
3.              public void onScrollStateChanged(AbsListView view, int scrollState) {  
4.   
5.              }  
6.   
7.              @Override  
8.              public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {  
9.            
10.                  if (firstVisibleItem > lastVisibleItemPosition) {// 上滑  
11.                      ivCamera.setVisibility(View.GONE);  
12.                  } else if (firstVisibleItem < lastVisibleItemPosition) {// 下滑  
13.                      ivCamera.setVisibility(View.VISIBLE);  
14.                  } else {  
15.                      return;  
16.                  }  
17.                  lastVisibleItemPosition = firstVisibleItem;  
18.              }  
19.          }  
20.         );</span>  

二、listview  上滑时某个控件悬浮置顶

listview布局

[html] view plain copy

1. <FrameLayout  
2.         android:layout_width="match_parent"  
3.         android:layout_height="match_parent"  
4.         android:layout_below="@id/header">  
5.   
6.         <com.handmark.pulltorefresh.library.PullToRefreshListView  
7.             android:id="@+id/listview"  
8.             android:layout_width="match_parent"  
9.             android:layout_height="match_parent"  
10.             android:background="#e0e0e0"  
11.             android:divider="@null"  
12.             android:dividerPadding="0dp"  
13.             android:scrollbars="none" />  
14.         <要置顶的布局> 
15. ...
16. ...
17.         <要置顶的布局/>  
18.     </FrameLayout>  

要置顶的控件单独在写一个layout

[html] view plain copy

1. <要置顶的布局/>  

[java] view plain copy

1. listView.addHeaderView(xuanfu);//悬浮式inflate进来的要置顶控件的布局  
2.   
3.         listView.setOnScrollListener(  
4.                 new AbsListView.OnScrollListener() {  
5.                     @Override  
6.                     public void onScrollStateChanged(AbsListView view, int scrollState) {  
7.   
8.                     }  
9.   
10.                     @Override  
11.                     public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {  
12.                         if (firstVisibleItem > 1) {  
13.                             ll_float.setVisibility(View.VISIBLE);//ll_float 为listview布局里面需要置顶的控件  
14.                         } else {  
15.                             ll_float.setVisibility(View.GONE);  
16.                         }  
17.                     }  
18.                 }  
19.         );  

三、listview监听滑动距离

[html] view plain copy

1. listView.setOnScrollListener(  
2.                 new AbsListView.OnScrollListener() {  
3.                     @Override  
4.                     public void onScrollStateChanged(AbsListView view, int scrollState) {  
5.   
6.                     }  
7.   
8.                     @Override  
9.                     public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {  
10.                          
11. //                            if (view != null && view.getChildAt(0) != null && view.getChildAt(0).getTop() != 0) {  
12. //  
13. //                                int height_item1 = view.getChildAt(1).getTop() - view.getChildAt(0).getTop();  
14. //                                int height_item2 = view.getChildAt(2).getTop() - view.getChildAt(1).getTop();  
15.   
16.                     }  
17.                             
18.                     }  
19.                 }  
20.         );