blocks|key|3332294|text|您可以选择本机sqlite选项(使用同步适配器框架进行同步)。根据您的要求，我想您还需要帐户登录来列出产品，这样Sync也将负责身份验证。有关相同的更多细节，您可以查看http://developer.android.com/training/sync-adapters/creating-sync-adapter.html。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3332295|因此，方法可以是:+1)启动应用程序时，检查是否为应用程序创建了一个帐户，如果没有，则创建一个新帐户，并配置一个定期同步启动。2)同步后，将数据存储在sqlite数据库中。3)使用cursorLoader，您将从sqlite中获取数据并将其显示在UI中。|3332296|这将允许用户浏览产品，即使没有网络，connection.You也可以修改查询，只获取特定数量的产品，并使用循环视图显示列表中的项目。|3332297|我觉得更重要的一点是，正如您提到的那样，不要从服务器获取全部数据，因为可能会有500-1000个或更多的产品，因为用户可能不会浏览所有的产品，而获取如此大量的数据将从用户数据包中消耗更多的数据字节，这显然他/她从来不想同时频繁地发出网络请求，永远不会允许用户设备采用StandBy模式，设备电池将大量耗尽，因为每一个网络呼叫都会使设备的电量增加到大约半分钟。|3332298|因此，现在根据间隔的数量来决定产品的数量，这将考虑到上面提到的缺点。这肯定会让用户高兴，你的应用程序也会更有效率。|3332299|P.s在实例化Adapter时，为标志属性传递0，因此，如果数据在其中发生更改，Loader将负责要求您的DB。|3332300|希望这有助于您决定进一步的步骤。|3332301|干杯。|3332302|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/training/sync-adapters/creating-sync-adapter.html^0|2C|26|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@$A|10|B|11|1|12]]|C|$]]|$1|D|3|E|5|6|7|13|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|14|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|15|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|16|8|@]|9|@]|C|$]]|$1|L|3|M|5|6|7|17|8|@]|9|@]|C|$]]|$1|N|3|O|5|6|7|18|8|@]|9|@]|C|$]]|$1|P|3|Q|5|6|7|19|8|@]|9|@]|C|$]]|$1|R|3|-4|5|6|7|1A|8|@]|9|@]|C|$]]]|S|$T|$5|U|V|W|C|$X|Y]]]]

You can go for Native sqlite option (sync using Sync adapter framework). As per your requirement i guess you would need the account login as well to list down the products so the Sync Adapater will take care of the Authentication as well.
you can check <a href="http://developer.android.com/training/sync-adapters/creating-sync-adapter.html" rel="nofollow">http://developer.android.com/training/sync-adapters/creating-sync-adapter.html</a> for more details on same.

so the Approach can be
1) when you start the app, check if an account has been created for your app and if not, create a new account and configure a periodic sync to start.
2) After sync it will be store the data inside the sqlite database.
3) Using cursorLoader you will fetch the data from the sqlite and display it on the UI.

This will allow the user to browse through the products even when there is no network connection.You can modify the query to fetch only specific amount of products and use recycle view to display the items on list.

One more important point which i feel is dont fetch the whole data from the server as you mentioned there can be 500-1000 and more products as there be always the case user might not browse through all the products and fetching such a large amount of data will sap more data bytes from the user data pack which obviously he/she never wants at the same time frequently making the network request will never allow the user device to go on StandBy mode and device battery will drained substantially as for every network call it make the device power up for around half a minute.

So now decide on some criteria on the number of products to be fetched on number of intervals which will take care of demerits mentioned above. That will definitely make user happy and your App will be much more efficient.

P.s while instantiating your Adapter pass 0 for the flags attribute so the Loader will be responsible for requiring your DB if the data has changed init.

Hope this helps you in deciding further steps.

Cheers.

blocks|key|3332315|text|试用firebase数据库，它提供了android客户端，您可以通过它很容易地同步数据。欲知更多详情，请参阅|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3332316|https://www.firebase.com/docs/android/guide/offline-capabilities.html|offset|length|3332317|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1X|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

Try out the firebase database, it provides android client through which you can sync the data very easily.
For more details check out 

<a href="https://www.firebase.com/docs/android/guide/offline-capabilities.html" rel="nofollow">https://www.firebase.com/docs/android/guide/offline-capabilities.html</a>

I am building an android application, which involves listing details of product. These products will be 500 to 1000 items and evolve over time, with changes from backend server.

To avoid fetching this large data from server each time to display list, need to persist in local database and display by querying from database.

For persisting data, i explored the following ways available.

<ol>
<li>Native sqlite (sync using sync adapter framework)</li>
<li>Realm (couldn't figure how to sync)</li>
<li>Couchbase lite (has it's own sync gateway)</li>
</ol>

But yet couldn't come into any conclusion for best possible approach.

Since the data is large and we need to have offline access to data through app, syncing data becomes very important. I am still learning these things.

Can someone please guide me in the right direction to design storing data and syncing data when there is some change in backend?

EDIT: 
 Though there are different views or multiple ways for designing data sync in an android app, want to understand few things:

<ol>
<li>Storage options
 a. Storing in native sqlite or NoSQL databases like Realm, CouchDB Lite ?</li>
<li>Sync options
 a. For syncing, do i need to have sqlite db structure to be same as server db ?
 b. Can Realm be combined with Sync adapter or does Realm has any other options for syncing ?</li>
<li>Database design
 a. Since each product item has further details to display upon clicking them, product details need to be fetched with another API call or all those details to be included in initial API call? what is the design approach to follow ? </li>
</ol>

How to sync server data in android app?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在构建一个android应用程序，其中包括列出产品的详细信息。这些产品将是500至1000项，并随着时间的推移，随着后端服务器的变化。为了避免每次从服务器获取这个大数据到显示列表，需要在本地数据库中持久化，并通过从数据库查询来显示。对于持久化数据，我探索了以下可用的方法。本机sqlite (使用同步适配器框架进行同...

问如何在android应用程序中同步服务器数据？
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