Android數據庫文件訪問

Question

我已經獲得了我的sqlite數據庫文件nhl.db，並將其放入我的項目的資產目錄中。然後我從eclipse運行模擬器並加載程序，但是當我調用db時，我得到'沒有這樣的表'的錯誤。我檢查data/data/myapp/databases /目錄，並且有一個名爲我的數據庫的文件，但是打開檢查它，它是一個空的數據庫文件，顯然是由SqLiteOpenHelper創建的，因爲它無法找到我的數據庫。

我的問題是我在哪裏把我的sqlite數據庫文件，以便它被打開，而不是創建？

public class DatabaseHandlerSimple extends SQLiteOpenHelper { 

// All Static variables 
// Database Version 
private static final int DATABASE_VERSION = 1; 

// Database Name 
private static final String DATABASE_NAME = "nhl"; 

// Contacts table name 
private static final String TABLE_PLAYERS = "players"; 

// Contacts Table Columns names 
private static final String KEY_ID = "id"; 
private static final String KEY_TEAM = "team"; 
private static final String KEY_NUMBER = "number"; 
private static final String KEY_FNAME = "firstname"; 
private static final String KEY_LNAME = "lastname"; 
private static final String KEY_POSITION = "position"; 

public DatabaseHandlerSimple(Context context) { 
    super(context, DATABASE_NAME, null, DATABASE_VERSION); 
} 

// Getting All Contacts 
public List<Player> getAllPlayers() { 
    List<Player> playerList = new ArrayList<Player>(); 
    // Select All Query 
    String selectQuery = "SELECT * FROM " + TABLE_PLAYERS; 

    SQLiteDatabase db = this.getWritableDatabase(); 
    Cursor cursor = db.rawQuery(selectQuery, null); 

    // looping through all rows and adding to list 
    if (cursor.moveToFirst()) { 
     do { 
      Player player = new Player(); 
      player.setID(Integer.parseInt(cursor.getString(0))); 
      player.setTeam(Integer.parseInt(cursor.getString(1))); 
      player.setNumber(Integer.parseInt(cursor.getString(2))); 
      player.setFirstName(cursor.getString(3)); 
      player.setLastName(cursor.getString(4)); 
      player.setPosition(Integer.parseInt(cursor.getString(5))); 
      // Adding contact to list 
      playerList.add(player); 
     } while (cursor.moveToNext()); 
    } 

    // return contact list 
    return playerList; 
} 

@Override 
public void onCreate(SQLiteDatabase arg0) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) { 
    // TODO Auto-generated method stub 

} 

}

Answer 1

有來自Vogella約SQLite的一個很好的教程，試試這個修復它。 對我來說，看起來你並沒有在這裏創建數據庫。

Answer 2

在此請看：http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/

可以刪除.db擴展名，只是它命名爲NHL的資產文件夾中。