如何使用内容提供商加入限制条款 [英] How to add limit clause using content provider

问题描述

有没有办法来限制从内容提供者返回的行数？ 我发现，但是，它并没有为我工作这解决方案。所有的行仍然被返回。

 开放的URI = Playlists.createIdUri（playlistId）; //生成URI
URI = uri.buildUpon（）appendQueryParameter（限制，3）建（）。
光标光标= activity.managedQuery（playlistUri，NULL，NULL，NULL，NULL）;
 

解决方案

我有这个问题，必须打破我的头，直到我终于想通了，或者说得到了为我工作的一个whay。请尝试以下

 光标光标= activity.managedQuery（playlistUri，NULL，NULL，NULL，ASC+限制2）;
 

最后一个参数是排序顺序。我公司提供的排序顺序，并追加了极限吧。请确保你给的空间正常。我检查了正在形成的查询，这似乎工作。

Is there a way to limit the number of rows returned from content provider? I found this solution, however, it did not work for me. All of the rows are still being returned.

Uri uri = Playlists.createIdUri(playlistId); //generates URI
uri = uri.buildUpon().appendQueryParameter("limit", "3").build();     
Cursor cursor = activity.managedQuery(playlistUri, null, null, null, null);

解决方案

I have had this issue and had to break my head till I finally figured it out, or rather got a whay that worked for me. Try the following

Cursor cursor = activity.managedQuery(playlistUri, null, null, null, " ASC "+" LIMIT 2");

The last parameter is for sortOrder. I provided the sort order and also appended the LIMIT to it. Make sure you give the spaces properly. I had to check the query that was being formed and this seemed to work.

这篇关于如何使用内容提供商加入限制条款的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！