如何重写getItemId（INT POS）从CursorAdapter的方法？ [英] How to override the getItemId(int pos) method from CursorAdapter?

问题描述

我得到这个问题由于对这里的另一个答案，但并没有解释如何做什么，我问 <一href="http://stackoverflow.com/questions/4826683/how-to-get-the-id-of-the-row-in-onitemclicklistview-when-using-a-custom-adapte">How获得该行的ID在onItemClick（ListView中）使用自定义适配器时？

I am getting this question due to another answer on here, but didn't explain how to do what I am asking How to get the id of the row in onItemClick(ListView) when using a custom Adapter?

这是接受了这个问题的答案是什么，我需要的，因为我也正在自己的自定义适配器（CursorAdapter的），所以我也会有同样的问题。问题是我不知道如何来实现这一目标。我在看的医生，而我不知道如何从一个游标访问_id列。由于文档没有它，我们可以得到的信息，从我坚持不变。任何帮助计算出来会更AP preciated。

The answer which was accepted in that question is what I need since I am also making my own custom adapter (CursorAdapter), hence I will have the same problem. The problem is I have no idea how to accomplish that. I am looking at the Doc, and am not sure how to access the _id column from a cursor. Since the Doc doesn't have the constant which we can get that info from I'm stuck. Any help figuring it out would be much appreciated.

编辑：我不清楚​​什么我的问题，但我只想澄清，如标题，我怎么可以覆盖我创建的CursorAdapter的自定义类的getItemId（）方法

I was not clear on what my question was, but just to clarify, like the title, how can I override the getItemId() method in the CursorAdapter custom class I created?

推荐答案

假设你没有光标作为您的适配器的成员：

Assuming you don't have the Cursor as a member of your Adapter:

@Override
public long getItemId(int position) {
    Cursor cursor = getCursor();
    cursor.moveToPosition(position);
    return cursor.getLong(mCursor.getColumnIndex("_id"));
}

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