Android SQLite： "カーソルにデータがありません"エラー

Question

setDist3（..）コードの後に​​、カーソルにデータがないと言って停止します。何が問題だろう！すべてのテーブル名とカラム名が一致します。なぜコードの途中でelse文を返すのですか？

public List<Information> findTwoBus(Integer fromNode, Integer toNode){ 

      List<Information> l_info = new ArrayList<Information>(); 

      String SQL ="SELECT '2' AS type, s1.`bid` AS busid1, s3.`bid` AS busid2, '0' AS busid3, ch1.`changeid` AS changeid1, '0' AS changeid2,(s2.`distance` - s1.`distance`) AS dist1,(s4.`distance` - s3.`distance`) AS dist2, '0' AS dist3 FROM `changestations` AS ch1, `routes` AS b1, `routes` AS b2,`routestations` AS s1 INNER JOIN `routestations` AS s2 ON s1.`bid` = s2.`bid` INNER JOIN `routestations` AS s3 ON s2.`pid` = s3.`pid` INNER JOIN `routestations` AS s4 ON s3.`bid` = s4.`bid`WHERE s1.`pid` = :from AND s2.`pid` = ch1.`changeid` AND s4.`pid` = :to AND s2.`distance` > s1.`distance` AND s4.`distance` > s3.`distance` AND b1.`id` = s1.`bid` AND b2.`id` = s3.`bid` AND b1.`similarity` <> b2.`similarity` ORDER BY (dist1 + dist2) LIMIT 5"; 
      Cursor res = myDataBase.rawQuery(SQL,new String[]{String.valueOf(fromNode), String.valueOf(toNode)}); 
      if(res.getCount() > 0){ 
       res.moveToFirst(); 
       do{ 
        Information info = new Information(); 

        info.setType(Integer.parseInt(res.getString(res.getColumnIndex("type")))); 
        info.setBusid1(Integer.parseInt(res.getString(res.getColumnIndex("busid1")))); 
        info.setBusid2(Integer.parseInt(res.getString(res.getColumnIndex("busid2")))); 
        info.setBusid3(Integer.parseInt(res.getString(res.getColumnIndex("busid3")))); 
        info.setChangeid1(Integer.parseInt(res.getString(res.getColumnIndex("changeid1")))); 
        info.setChangeid2(Integer.parseInt(res.getString(res.getColumnIndex("changeid2")))); 
        //code runs upto here  
        info.setDist3(Integer.parseInt(res.getString(res.getColumnIndex("dist3")))); 

       // from here it says that cursor has no data in logcat and crashes 
        info.setDist2(Integer.parseInt(res.getString(res.getColumnIndex("dist2")))); 

        info.setDist1(Integer.parseInt(res.getString(res.getColumnIndex("dist1")))); 

        l_info.add(info); 
        res.moveToNext(); 
       } while(!res.moveToLast()); 
      } else{ 
       Log.e("SQL Query Error","Cursor has no data");} 
      return l_info; 
     } 

5月17日17：33：16.860 8665から8665/com.example.tripathee.gantabya E/SQLクエリエラー：33：カーソルはデータ

5月17日17を持っていません16.860 8665- 8665/com.example.tripathee.gantabya W/dalvikvm：スレッドID = 1：捕捉されない例外で終了スレッド（グループ= 0x4167ec80）

Answer 1

は、私はあなたがwhile文に問題があると信じて：

while(!res.moveToLast()); 

Shouldnこれはこれですか？：

は

while(!res.isAfterLast());