如何排序Arraylist <Hashmap <String,String >>

Question

这里我有一个查询,其中我根据条件获取名称和值,我在列表中存储empid和empname的值

这是一段代码:

List<String> _empid = new ArrayList<String>();
List<String> _empname = new ArrayList<String>();

在这里,我从数据库中获取值:

while (cur1.moveToNext()) {
if (cur1.getString(cur1.getColumnIndex("name"))
        .equalsIgnoreCase("DIS_FIELD_COLLECTION_EXECUTIVE")) {

         _empid.add(cur1.getString(cur1.getColumnIndex("value")));

   } else if (cur1.getString(cur1.getColumnIndex("name"))
                  .equalsIgnoreCase("FIELD_EXECUTIVE_NAME")) {

         _empname.add(cur1.getString(cur1.getColumnIndex("value")));

   }
}

 for (int i = 0; i < _empid.size(); i++) {
          HashMap<String, String> map = new HashMap<String, String>();
          map.put("id", _empid.get(i));
          map.put("name", _empname.get(i));

          Log.e("forloop", _empid.get(i));
          Log.e("forloop", _empname.get(i));

          emp.add(map);
          adp_emp = new Listadapter_emp(emp, Tracker_filter_Activity.this);
                        lst_employee.setAdapter(adp_emp);
}

这里的输出是这样的

01-17 12:16:49.696 29369-29369/com.wp.focus E/forloop: 5
01-17 12:16:49.696 29369-29369/com.wp.focus E/forloop: AZAD NAGAR-TAN001    
01-17 12:16:49.697 29369-29369/com.wp.focus E/forloop: 3
01-17 12:16:49.697 29369-29369/com.wp.focus E/forloop: PURVANG PANDYA-FPP022
01-17 12:16:49.698 29369-29369/com.wp.focus E/forloop: 2
01-17 12:16:49.698 29369-29369/com.wp.focus E/forloop: TWESTT TESST-TTT001    
01-17 12:16:49.699 29369-29369/com.wp.focus E/forloop: 9
01-17 12:16:49.699 29369-29369/com.wp.focus E/forloop: SDSDHH XDGHGSDFHGSD-TSX001    
01-17 12:16:49.699 29369-29369/com.wp.focus E/forloop: 8
01-17 12:16:49.699 29369-29369/com.wp.focus E/forloop: TEST TEST-TTT002    
01-17 12:16:49.699 29369-29369/com.wp.focus E/forloop: 6
01-17 12:16:49.699 29369-29369/com.wp.focus E/forloop: AZADALAM NAGAR-TAN002

必需的输出是名称应按字母顺序排序,id应按名称排列,即必需输出如:

AZAD NAGAR-TAN001            5
AZADALAM NAGAR-TAN002        6
PURVANG PANDYA-FPP022        3
SDSDHH XDGHGSDFHGSD-TSX001   9
TEST TEST-TTT002             8
TWESTT TESST-TTT001          2

因此,ID应该根据排序名称进行调整,我得到名称和ID但不是按照排序的方式我使用谷歌的各种例子仍然没有找到.如果这个解决了将不胜感激,谢谢.

Answer 1

您可以使用以排序方式存储数据的树映射.其次,您可以在地图中将Id(key)放在名称中.

如果你仍然想以相同的方式使用Collections.sort(),那么你可以用来对列表进行排序.