光標未正確初始化？

我被定義如下創建數據庫表： -光標未正確初始化？

public static final String Create_Database2= "CREATE TABLE " + Table_Name2 + "(" 
       + play20 + " INTEGER PRIMARY KEY, " 
       + play1 + " LONG, " 
       + play2 + " LONG, " 
       + play3 + " INTEGER, " 
       + play4 + " INTEGER, " 
       + play5 + " LONG, " 
       + play6 + " TEXT, " 
       + play7 + " TEXT, " 
       + play8 + " TEXT, " 
       + play9 + " TEXT, " 
       + play10 + " TEXT, " 
       + play11 + " INTEGER, " 
       + play12 + " INTEGER, " 
       + play13 + " INTEGER, " 
       + play14 + " INTEGER, " 
       + play15 + " INTEGER, " 
       + play16 + " INTEGER, " 
       + play17 + " TEXT, " 
       + play18 + " INTEGER, " 
       + play19 + " TEXT" 
       + ") ";

現在我從它像這樣得到的數據： -

public Cursor getcontent() 
     { 
      Cursor d= database.query(DatabaseHandler.Table_Name2,allColumns,selection, null, null,null,null); 
     } 
public String[] allColumns = { DatabaseHandler.play5, DatabaseHandler.play6,DatabaseHandler.play7, 
      DatabaseHandler.play8,DatabaseHandler.play9,DatabaseHandler.play10 }; 
String selection="playlist_id=100813";

以上是我的數據選擇的標準

Cursor r=X.getcontent(); 
      if (r.getCount() > 0) { 
      r.moveToFirst(); 
       do { 
       String id = r.getString(r.getColumnIndex("content_id")); 
         al.add(id); 
        String from_date =r.getString(r.getColumnIndex("from_date")); 
        String to_date =r.getString(r.getColumnIndex("to_date")); 
        String from_time =r.getString(r.getColumnIndex("from_time")); 
        String to_time =r.getString(r.getColumnIndex("to_time")); 
        String days =r.getString(r.getColumnIndex("days")); 
        String duration =r.getString(r.getColumnIndex("duration")); 
       } while (r.moveToNext()==true); 
       r.close(); 
       } else { 
       Log.i("TAG"," No value found"); 
      }

我得到這個錯誤logcat

02-22 15:37:04.565: E/AndroidRuntime(11544): FATAL EXCEPTION: main 
02-22 15:37:04.565: E/AndroidRuntime(11544): java.lang.RuntimeException: 
Unable to start activity ComponentInfo{com.example.webdata/com.example.webdata.MainActivity}:java.lang.IllegalStateException: 
Couldnt read row 0, col -1 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.

我在做什麼錯在這裏？

來源

2013-02-22 Pramod Yadav

您可以檢查的getContent（）不返回空？ – Anukool 2013-02-22 10:16:56

是的，它不返回空我已經檢查過它 – 2013-02-22 10:21:27

所以我認爲它明確..嘗試在database.query（）方法中傳遞正確的參數。 – Anukool 2013-02-22 10:31:33