如何在我的内容提供者中获取 _count? [英] How do I get the _count in my content provider?

问题描述

我应该怎么做才能让我的内容提供者返回带有记录计数的 _count 列?文档说它是自动的，但也许它只需要一些内置的内容提供者.对数据库运行查询似乎不会返回它.

What should I do to get my content provider to return the _count column with the count of records? The documentation says it is automatic, but maybe it's only taking about some built-in content provider. Running a query to the database seems not to return it.

推荐答案

如果您使用的是 ContentProvider.query()，则返回一个 Cursor.调用 Cursor.getCount() 获取返回游标中的记录数.

If you are using ContentProvider.query() a Cursor is returned. Call Cursor.getCount() to get a count of records in the returned cursor.

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