(转)解决ScrollView嵌套ListView或者GridView导致只显示一行的方法

即动态获取ListView和GridView的高度

一、对于ListView

ListView listview= new ListView(this);

setListViewHeightBasedOnChildren(listview);即可

 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);
             }

二、对于GridView

GridView gridview = new GridView(this);

setGridViewHeightBasedOnChildren(gridview );即可

 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);
             }