android 官方不支持scrollview内部嵌套一个scrollview,所以listview嵌套listview或者scrollview嵌套ExpandableListView的话,listview的item是显示不全的,公司最近的项目中涉及到了这个问题,解决方法如下: public void setListViewHeightBasedOnChildren(ListView listView) { ListAdapter listAdapter = listView.getAdapter(); if (listAdapter == null) { return; } int totalHeight = 0; for (int i = 0; i < listAdapter.getCount(); i++) { View listItem = listAdapter.getView(i, null, listView); listItem.measure(0, 0); totalHeight += listItem.getMeasuredHeight(); } ViewGroup.LayoutParams params = listView.getLayoutParams(); params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1)); listView.setLayoutParams(params); } ScrollView中嵌套ExpandableListView: public static void setListViewHeightBasedOnChildren(ExpandableListView listView ) { // 获取ListView对应的Adapter ExpandableListAdapter listAdapter = listView.getExpandableListAdapter(); if (listAdapter == null) { // pre -condition return; } int totalHeight = 0; for (int i = 0; i < listAdapter.getGroupCount(); i++) { // listAdapter.getCount()返回数据项的数目 View listgroupItem = listAdapter .getGroupView(i, true, null, listView ); listgroupItem.measure(0, 0); // 计算子项View 的宽高 totalHeight += listgroupItem .getMeasuredHeight(); // 统计所有子项的总高度 System. out.println("height : group" +i +"次" +totalHeight ); for (int j = 0; j < listAdapter.getChildrenCount( i); j++) { View listchildItem = listAdapter .getChildView(i, j, false , null, listView); listchildItem.measure(0, 0); // 计算子项View 的宽高 totalHeight += listchildItem.getMeasuredHeight(); // 统计所有子项的总高度 System. out.println("height :" +"group:" +i +" child:"+j+"次"+ totalHeight); } } ViewGroup.LayoutParams params = listView .getLayoutParams(); params.height = totalHeight + ( listView.getDividerHeight() * (listAdapter.getGroupCount() - 1)); // 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 ); }
前者是实现项目中,订单中心一个订单对应多个商品list展示,后者是购物车一个人对应多个商品并添加支付等信息时使用,后者根据前者修改的,网上关于ExpandableListView计算高度的好像挺少的,就自己改写了。 |