与谷歌IO REST模式的ContentProvider的SQLite的交易？ [英] SQLite transactions with Google IO REST pattern's ContentProvider?

问题描述

我想要实现这个视频psented维吉尔Dobjanschi第二REST客户端模式$ P $：

I'm trying to implement the second REST client model presented by Virgil Dobjanschi on this video:

<一个href="http://developer.android.com/videos/index.html#v=xHXn3Kg2IQE">http://developer.android.com/videos/index.html#v=xHXn3Kg2IQE

这是模型，我说的是高层次图：

This is the high level diagram for the model I'm talking about:

我实现所有的建议，但我有很多表的复杂的SQLite数据库模型，我需要使用事务来更新我从服务器（在图片的步骤7）检索到全新的数据本地数据。

I implemented everything as suggested, but I have a complex SQLite database model with lots of tables and I need to use transactions to update my local data with brand new data retrieved from server (step 7 in the picture).

有没有什么建议，你可以对帮助我实现事务性ContentProvider的这种情况？

Are there any suggestions you could make to help me out implement a transactional ContentProvider for this case?

有些人可能会建议我使用原始的SQLite代替，但这样一来，我不会采取ContentObservers，managedQueries和数据库的优势存取同步由ContentProvider的规定。

Some of you may suggest me to use raw SQLite instead, but this way I won't take the advantages of ContentObservers, managedQueries and database accesses synchronization provided by the ContentProvider.

任何帮助将是AP preciated。

Any help would be appreciated.

推荐答案

由于您没有访问该级别11 API，你可以这样做，而不是。比方说，你想这样做交易的东西在你的更新方法：

Since you don't have access to the the Level 11 API, you could do this instead. Lets say you want to do this transaction stuff in your update method:

final Cursor update(Uri uri, ContentValues values, String where, String[] selectionArgs)
{

   if(uri == uri1){
     //do stuff you normally do
   }
   //other uri stuff
   ...
   else if(uri == special_uri){
     //do your transaction stuff here
   }
}

在这种情况下， special_uri 是用来表明你将需要做的特殊交易的东西的URI。换句话说，我们使用URI在这里表示一个事务必须做到的。

In this case, special_uri is a uri you use to indicate that you're going to need to do your special transaction stuff. In other words, we're using the URI here to indicate that a transaction must be done.

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