关于listview求助

Question

listview

Answer 1

private List<Map<String, Object>> getData(){
list = new ArrayList<Map<String, Object>>();
Map<String, Object> map_xsgl = new HashMap<String, Object>();
map_xsgl.put("text", "学生管理");
map_xsgl.put("img", R.drawable.on);
list.add(map_xsgl);Map<String, Object> map_jsgl = new HashMap<String, Object>();
map_jsgl.put("text", "教师管理");
map_jsgl.put("img", R.drawable.off);
list.add(map_jsgl);Map<String, Object> map_xxck = new HashMap<String, Object>();
map_xxck.put("text", "信息查看");
map_xxck.put("img", R.drawable.off);
list.add(map_xxck);Map<String, Object> map_bjgn = new HashMap<String, Object>();
map_bjgn.put("text", "报警功能");
map_bjgn.put("img", R.drawable.off);
list.add(map_bjgn);return list;
}

Answer 2

你这里
list = new ArrayList<Map<String, Object>>();
Map<String, Object> map_xsgl = new HashMap<String, Object>();
map_xsgl.put("text", "学生管理");
map_xsgl.put("img", R.drawable.on);
list.add(map_xsgl);list = new ArrayList<Map<String, Object>>();
Map<String, Object> map_jsgl = new HashMap<String, Object>();
map_jsgl.put("text", "教师管理");
map_jsgl.put("img", R.drawable.off);
list.add(map_jsgl);list = new ArrayList<Map<String, Object>>();
Map<String, Object> map_xxck = new HashMap<String, Object>();
map_xxck.put("text", "信息查看");
map_xxck.put("img", R.drawable.off);
list.add(map_xxck);list = new ArrayList<Map<String, Object>>();
Map<String, Object> map_bjgn = new HashMap<String, Object>();
map_bjgn.put("text", "报警功能");
map_bjgn.put("img", R.drawable.off);
list.add(map_bjgn);每次都new肯定是只有最后一个了，你这不应该是new ，应该创建一个全局变量的list，然后使用list.add()方法把数据加进去，而不是每次都new，这样加载的肯定是最后一条数据，把之前的覆盖掉了