public static void setListViewHeightBasedOnChildren(ListView listView) {

                     // 获取ListView对应的Adapter

                     ListAdapter listAdapter = listView.getAdapter();

                     if (listAdapter == null) {

                             // pre-condition

                             return;

                     }

                     int totalHeight = ;

                     for (int i = , len = listAdapter.getCount(); i < len; i++) { // listAdapter.getCount()返回数据项的数目

                             View listItem = listAdapter.getView(i, null, listView);

                             listItem.measure(, ); // 计算子项View 的宽高

                             totalHeight += listItem.getMeasuredHeight(); // 统计所有子项的总高度

                     }

                     ViewGroup.LayoutParams params = listView.getLayoutParams();

                     params.height = totalHeight

                                     + (listView.getDividerHeight() * (listAdapter.getCount() - ));

                     // listView.getDividerHeight()获取子项间分隔符占用的高度

                     // params.height最后得到整个ListView完整显示需要的高度

                     listView.setLayoutParams(params);

             }

 public static void setGridViewHeightBasedOnChildren(GridView gridView) {

                     // 获取GridView对应的Adapter

                     ListAdapter listAdapter = gridView.getAdapter();

                     if (listAdapter == null) {

                             return;

                     }

                     int rows;

                     int columns=;

                     int horizontalBorderHeight=;

                     Class<?> clazz=gridView.getClass();

                     try {

                             //利用反射，取得每行显示的个数

                             Field column=clazz.getDeclaredField("mRequestedNumColumns");

                             column.setAccessible(true);

                             columns=(Integer)column.get(gridView);

                             //利用反射，取得横向分割线高度

                             Field horizontalSpacing=clazz.getDeclaredField("mRequestedHorizontalSpacing");

                             horizontalSpacing.setAccessible(true);

                             horizontalBorderHeight=(Integer)horizontalSpacing.get(gridView);

                     } catch (Exception e) {

                             // TODO: handle exception

                             e.printStackTrace();

                     }

                     //判断数据总数除以每行个数是否整除。不能整除代表有多余，需要加一行

                     if(listAdapter.getCount()%columns>){

                             rows=listAdapter.getCount()/columns+;

                     }else {

                             rows=listAdapter.getCount()/columns;

                     }

                     int totalHeight = ;

                     for (int i = ; i < rows; i++) { //只计算每项高度*行数

                             View listItem = listAdapter.getView(i, null, gridView);

                             listItem.measure(, ); // 计算子项View 的宽高

                             totalHeight += listItem.getMeasuredHeight(); // 统计所有子项的总高度

                     }

                     ViewGroup.LayoutParams params = gridView.getLayoutParams();

                     params.height = totalHeight+horizontalBorderHeight*(rows-);//最后加上分割线总高度

                     gridView.setLayoutParams(params);

             }