錯誤而更新表的Android源碼

`// * ** * ** * ** * ** * ** 錯誤的logcat 表示 ** * *** android.database.sqlite.SQLiteException：no such column：me：，while compiling：UPDATE TemplateTable SET user =？，alert =？，mycard =？ WHERE用戶=我錯誤而更新表的Android源碼

// * ** * ** * ** * ** * ** * *設置活動* ** * ** * ** * ** *

Button save =（Button）findViewById（R.id.save_templates）; save.setOnClickListener（新View.OnClickListener（）{

 public void onClick(View arg0) { 
      // TODO Auto-generated method stub 

      // Save templates selected 
      CardsDatabase db = new CardsDatabase(Settings.this); 
      db.open(); 
      ContentValues cv=new ContentValues(); 
      cv.put(CardsDatabase.USERTEMPLATE, "me"); 
      cv.put(CardsDatabase.ALERT, Integer.toString(alert)); 
      cv.put(CardsDatabase.MYCARD, Integer.toString(mycard)); 
      db.updateTemplate(cv); 
      db.close(); 

      Toast.makeText(Settings.this, "Settings saved successfully.", Toast.LENGTH_SHORT).show(); 

     } 
    });

// * ** * ** * ** * ** * ** * ** 數據庫類* ** * ** * ** * ** * ***

公共類CardsDatabase {

public static String USERTEMPLATE = "user"; 
public static String MYCARD = "mycard"; 
public static String ALERT = "alert"; 

public static String USER = "user"; 
public static String NAME = "name"; 
public static String COMPANY = "company"; 
public static String TITLE = "title"; 
public static String ADDRESS = "address"; 
public static String PHONE = "phone"; 
public static String CEL = "cel"; 
public static String EMAIL = "email"; 
public static String PHOTO = "photo"; 

public static String MAC = "macaddress"; 

private static String DATABASE_NAME = "CardsDatabase"; 
public static String DATABASE_TABLE_TEMPLATE = "TemplateTable"; 
public static String DATABASE_TABLE_MYTABLE = "MYTable"; 
public static String DATABASE_TABLE_CONTACTS = "ContactsTable"; 

private static int DATABASE_VERSION = 1; 

private DbHelper ourHelper; 
private final Context ourContext; 
private SQLiteDatabase ourDatabase; 

private static class DbHelper extends SQLiteOpenHelper { 

    public DbHelper(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 
     // TODO Auto-generated constructor stub 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     // TODO Auto-generated method stub 
     // Log.d(Tag,"Inner on create called"); 
     db.execSQL("CREATE TABLE " + DATABASE_TABLE_TEMPLATE + " (" 
       + USERTEMPLATE + " TEXT NOT NULL," + MYCARD 
       + " TEXT NOT NULL," + ALERT + " TEXT NOT NULL" + ");"); 

     db.execSQL("CREATE TABLE " + DATABASE_TABLE_MYTABLE + " (" + USER 
       + " TEXT NOT NULL," + NAME + " TEXT NOT NULL," + COMPANY 
       + " TEXT," + TITLE + " TEXT," + ADDRESS + " TEXT," + PHONE 
       + " TEXT NOT NULL," + CEL + " TEXT," + EMAIL 
       + " TEXT NOT NULL," + PHOTO + " BLOB" + ");"); 

     db.execSQL("CREATE TABLE " + DATABASE_TABLE_CONTACTS + " (" + MAC 
       + " TEXT NOT NULL" + ");"); 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     // TODO Auto-generated method stub 
     db.execSQL("DROP TABLE IF EXISTS" + DATABASE_TABLE_TEMPLATE); 
     db.execSQL("DROP TABLE IF EXISTS" + DATABASE_TABLE_MYTABLE); 
     db.execSQL("DROP TABLE IF EXISTS" + DATABASE_TABLE_CONTACTS); 
     onCreate(db); 
    } 

} 

public CardsDatabase(Context c) { 
    ourContext = c; 
} 

public CardsDatabase open() throws SQLException { 
    ourHelper = new DbHelper(ourContext); 
    ourDatabase = ourHelper.getWritableDatabase(); 
    return this; 
} 

public void close() { 
    ourHelper.close(); 
} 

public void createEntry(int type, ContentValues cv) { 
    // TODO Auto-generated method stub 

    switch (type) { 
    case 1: 
     ourDatabase.insert(DATABASE_TABLE_TEMPLATE, null, cv); 
     break; 
    case 2: 
     ourDatabase.insert(DATABASE_TABLE_MYTABLE, null, cv); 
     break; 
    case 3: 
     ourDatabase.insert(DATABASE_TABLE_CONTACTS, null, cv); 
     break; 
    } 

} 

public Cursor getTemplate() throws SQLException { 
    // TODO Auto-generated method stub 

    String[] columns = new String[] { USERTEMPLATE, MYCARD, ALERT }; 

    Cursor c = ourDatabase.query(DATABASE_TABLE_TEMPLATE, columns, null, 
      null, null, null, null); 

    return c; 
} 

public Cursor getMyData() throws SQLException { 
    // TODO Auto-generated method stub 

    String[] columns = new String[] { USER, NAME, COMPANY, TITLE, ADDRESS, 
      PHONE, CEL, EMAIL, PHOTO }; 

    Cursor c = ourDatabase.query(DATABASE_TABLE_MYTABLE, columns, null, 
      null, null, null, null); 

    return c; 
} 

public boolean contactExist(String mac) throws SQLException { 
    // TODO Auto-generated method stub 

    String[] columns = new String[] { MAC }; 

    Cursor c = ourDatabase.query(DATABASE_TABLE_CONTACTS, columns, MAC 
      + "=" + mac, null, null, null, null); 

    return c.getCount() > 0 ? true : false; 
} 

public void updateTemplate(ContentValues cv) { 
    String m = "me"; 
    ourDatabase.update(DATABASE_TABLE_TEMPLATE, cv, USERTEMPLATE + "=" + m, 
      null); 
} 

public void updateMytable(ContentValues cv) { 
    String m = "me"; 
    ourDatabase.update(DATABASE_TABLE_MYTABLE, cv, USER + "=" + m, null); 
}

來源

2012-01-25 Ahmed

您需要提供更多的細節，但我會願意賭你更新你的模式，而不會增加你的SQLiteOpenHelper實現中的版本號。

編輯

通過您的代碼看後，你需要單引號的更新方法添加到您的WHERE子句。如果不使用引號，數據庫引擎將它作爲你的表中的列，因此錯誤「沒有這樣的列：我」

您有：

public void updateTemplate(ContentValues cv) { 
    String m = "me"; 
    ourDatabase.update(DATABASE_TABLE_TEMPLATE, cv, USERTEMPLATE + "=" + m, 
      null); 
}

應該是這樣的：

public void updateTemplate(ContentValues cv) { 
    String m = "me"; 
    String WHERE = String.format("%s='%s'", USERTEMPLATE, m); 
    ourDatabase.update(DATABASE_TABLE_TEMPLATE, cv, WHERE, null); 
}

來源

2012-01-25 14:35:24 Rich

我沒有更新的模式，我只是更新排在用戶列中包含「我」 – Ahmed

模板（用戶，警報，mycard），這些都是3 colu mns在裏面。 – Ahmed

非常感謝它的工作 – Ahmed

你需要使用單引號圍繞「我」在您的查詢

來源

2012-01-25 14:50:46 Steve

謝謝，它的工作原理 – Ahmed

錯誤而更新表的Android源碼

回答

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