使用#close后,应该释放光标

Question

我正在使用Android的这个代码,但是当我调试时,我看到了这个错误: the cursor should be freed up after use with #close

这一行有错误:

 cursor = db.query(DATABASE_TABLECa, new String[]{ key_RoWid ,Key_GroupName}, null, null, null, null, null);

  public List<ListAdapterdb> Getall() {
        List<ListAdapterdb> dataList = new ArrayList<ListAdapterdb>();
       db = dbhelper.getReadableDatabase();
        Cursor cursor= null;
         cursor = db.query(DATABASE_TABLECa, new String[]{ key_RoWid ,Key_GroupName}, null, null, null, null, null);
        if (cursor.moveToFirst()) {
            do {
                ListAdapterdb data = new ListAdapterdb();
               //data.setID(Integer.parseInt(cursor.getString(0)));
                data.setItem(cursor.getString(1));
                // Adding contact to list
                dataList.add(data);
            } while (cursor.moveToNext());
        }
        return dataList;

    }

Answer 1

cursor.close()处理完数据后需要打电话.

try {
    ListAdapterdb data = new ListAdapterdb();
    while (cursor.moveToNext()) {
        // data.setID(Integer.parseInt(cursor.getString(0)));
        data.setItem(cursor.getString(1));
        // Adding contact to list
        dataList.add(data);
    }
} finally {
    cursor.close()
}