Android 使用空字符串按降序排序JSONArray

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我有一个乔恩阵列

[
{
"ID":"1324"
"iname":"Abc",
"icounts":"234",
"ilikes":"098"
},
{
"ID":"1224"
"iname":"bcd",
"icounts":"",    //icounts has empty value
"ilikes":"098"
},
{
"ID":"1367"
"iname":"Abc",
"icounts":"28",
"ilikes":"098"
},
{
"ID":"1098"
"iname":"Abc",
"icounts":"",
"ilikes":"098"
},
{
"ID":"1444"
"iname":"dfgbc",
"icounts":"222",
"ilikes":"098"
},
{
"ID":"1411"
"iname":"bwec",
"icounts":"444",
"ilikes":"9"
}

]

我必须按icount值降序排序

ArrayList<HashMap<String,String>> arrayList= ArrayList<HashMap<String,String>>;
String jsonString = EntityUtils.toString(hres.getEntity()); // in jsonString i am storing json response 
JSONArray jarray = new JSONArray(jsonString);
for (int i = 0 ; i <jarray.length();i++)
{
 JSONObject jobj = jarray.getJSONObject(i);
 HashMap<String,String> map = new HashMap<String,String>();
 map.put("ID", jobj.getString("ID"));

 map.put("iname", jobj.getString("iname"));
 map.put("icount", jobj.getString("icount"));
 map.put("ilikes", jobj.getString("ilikes"));
 arrayList.add(map);
 Collections.sort(arrayList, new Comparator<HashMap<String, String>>() {
  @Override
 public int compare(HashMap<String, String> lhs, HashMap<String, String> rhs) {
  return lhs.get("icounts").compareTo(rhs.get("icounts"));
  }
});
}

由于空字段，compareTo未正确排序 所以我想按降序排序。

---

建议请添加一个逻辑来检查icount值，如果值为null或空字符串，请添加值0。 例如：

String icounts = jobj.getString("icount");

检查如下：

if(icounts!=null && icounts.trim().length() >0 )
{
map.put("icount", jobj.getString("icount"));
}
else{
map.put("icount", "0");
}

希望这对您有所帮助

我认为您不应该使用HashMap。您可能应该为数据创建一个类，其中包含for字段。然而，Raghu Rami Reddy的回复似乎不错。