Android sqlite update table always return 0

Question

I have seen several questions here related to updating in sqlite, but not able to solve this problem. I am unable to update table, it always give 0;

public void onCreate(SQLiteDatabase db) {
    try{
    db.execSQL(createTable);
    db.execSQL(createQuestionTable);
    populateQuestionTable(db);
    }

    catch( SQLException e)
    {
        e.printStackTrace();
    }
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL("DROP TABLE IF EXISTS alarms" );
    onCreate(db);

}

I am able to insert and fetch data, but there is only problem in updating it.

public int updateTable( int r )
{
    String row = String.valueOf(r);
    Log.d("mydb", "disbale alarm" + " " + row);
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put(isDisable, 1);

    int result = 0;
    try{
     result = db.update("alarms", values,  keyId+" = ? " ,new String[]{row});
    Log.d("result", ""+result);
    }
    catch(Exception e)
    {
        e.printStackTrace();
    }

    db.close();

    return result;
}

P.S. I have also tried execSql()