Android SQLite，尝试从数据库中获取数据时出现语法错误

Question

我是这个

  

11-19 19：16：38.920：E / SQLiteLog（5568）:( 1）靠近“SELECT”：语法   错误

错误的Android选择查询，然后我的应用程序崩溃，我无法理解为什么会发生。

String selectQuery = "SELECT  * FROM " + MySQLiteHelper.TABLE_CATEGORIA;
            Log.e("DB", "select query "+selectQuery);
            SQLiteDatabase db = dbHelper.getReadableDatabase();
            Log.e("DB", "db "+db);
            Cursor c = db.rawQuery(selectQuery, null);
            if (c.moveToFirst()) {
                do {
                    if(c.getString(c.getColumnIndex(MySQLiteHelper.COLUMN_NOMECATEGORIA)).equalsIgnoreCase(name)){
                        id=c.getInt(c.getColumnIndex(MySQLiteHelper.COLUMN_ID));
                        color=c.getFloat(c.getColumnIndex(MySQLiteHelper.COLUMN_COLORE));
                        return color;
                    }
                    coloriusati.add(c.getFloat(c.getColumnIndex(MySQLiteHelper.COLUMN_COLORE)));
                } while (c.moveToNext());
            }

Answer 1

SELECT命令后有两倍的空格。

String selectQuery = "SELECT  * FROM " + MySQLiteHelper.TABLE_CATEGORIA;

删除'SELECT'后的额外空格，它应该可以工作。

String selectQuery = "SELECT * FROM " + MySQLiteHelper.TABLE_CATEGORIA;