Android ListView

1. 仿Ios listview具有弹力拉伸效果

   重写listview中overScrollBy()方法，修改maxOverScrollY为自己当前设定的值。

   /**
   
    * 
   
    * Description：仿ios ListView有弹力拉伸效果
   
    * 
   
    * @author YangDODO
   
    * 
   
    */
   
   public class FlexibleListView extends ListView {
   
   
   
       private static int mMaxOverDistance = 50;// 拉伸距离
   
   
   
       public FlexibleListView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); initView(context); } public FlexibleListView(Context context, AttributeSet attrs) { super(context, attrs); initView(context); } public FlexibleListView(Context context) { super(context); initView(context); } private void initView(Context context) { DisplayMetrics metrics = context.getResources().getDisplayMetrics(); float density = metrics.density; mMaxOverDistance = (int) (density * mMaxOverDistance); } @Override protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) { return super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, maxOverScrollX, mMaxOverDistance, isTouchEvent); }

    

2. 解决scrollview嵌套ListView问题

    　　    @Override
   
           protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
   
                   int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
   
                                   MeasureSpec.AT_MOST);
   
   
   
                   super.onMeasure(widthMeasureSpec, expandSpec);
   
           }

    

3. 如何让多个android listview同时使用一个滚动条？设置listview高度

     /**
   
        * 设置listview高度，注意listview子项必须为LinearLayout才能调用该方法
   
        * @param listview listview
   
        * 
   
        */
   
       public static void  setListViewHeight(ListView listview){  
   
           int totalHeight = 0;    
   
          ListAdapter adapter= listview.getAdapter();
   
          if(null != adapter){
   
           for (int i = 0; i <adapter.getCount(); i++) {    
   
           View listItem = adapter.getView(i, null, listview);
   
               if (null != listItem) {
   
               listItem.measure(0, 0);//注意listview子项必须为LinearLayout才能调用该方法
   
               totalHeight += listItem.getMeasuredHeight();
   
               }
   
           }    
   
               
   
           ViewGroup.LayoutParams params = listview.getLayoutParams();    
   
           params.height = totalHeight + (listview.getDividerHeight() * (listview.getCount() - 1));    
   
           listview.setLayoutParams(params);  
   
          }
   
       }