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);  
          }
       }