英文:
Saving User datas in Shared Prefererences or Retrieving datas from firebase in every session
问题
我正在使用 Android Studio 和 Firebase 为我的学校开发一个基于角色的应用程序。我无法决定如何显示或控制用户数据。
我正在使用 Firestore 来存储用户数据，例如：姓名、角色、班级。
当用户启动活动时，该活动应该从自己的文档中获取用户数据，对吗？
但我不希望在每次部署应用程序时都读取数据。因此，我使用了 Shared Preferences 来存储数据。然而，这使代码变得复杂并降低了可重用性。
而且，由于我的应用程序是基于角色的，从 Shared Preferences 中很难检查用户是否是管理员。
在每次部署应用程序时读取用户文档
优点：除了账单之外，一切都看起来不错。
缺点：读取操作的费用。
存储在 Shared Preferences 中
优点：看起来经济实惠。
缺点：代码复杂，可重用性较低，if else 语句数量较多。
哪种方法更好？
或者您有任何建议吗？
英文:
I am developing a role-based application for my school using android studio with firebase. I couldn't make a decision about how can i display or control user datas.
I am using firestore for storing user datas, for example; name,role,class.
When user starts activity, the activity should fetch user datas from it's own document, right?
But i didn't want to read datas in every deploy of application. So i used shared preferences for storing datas. However it complexed code and reduced reusability.
Also since my application is role-based, it's hard to check if user is admin from shared preferences
Reading user document in every deploy of application
pros: Everything seems fine except bill
cons: Bills of read operations
Storing in shared preferences
pros: Seems economic
const: complex code, reusability is low, if else count is high
Which one is better?
Or do you have any suggestions?
答案1
得分: 1
一个数据库和本地存储有两个不同的用途。既然您说您需要检查用户是否为管理员，您可能需要一个位于互联网上的数据库来验证，而不是将其存储在本地设备上。
如果您不需要验证任何内容，也不需要在设备之间/用户之间共享数据，您可以使用本地存储。但是，应该使用共享首选项仅存储小型数据，即键值对数据。如果您想存储更复杂的数据和更多的数据，可以使用SQLite（https://developer.android.com/training/data-storage/room）。
至于计费问题，如果价格是一个问题，您总是可以自己设置一个带有PostgreSQL数据库的HTTP服务器，例如。
英文:
A database and local storage have 2 separate use cases. Since you say that you need to check if an user is admin, you will probably need a database on the internet to validate that yourself, not store it on the local device.
If you don't need to validate anything or share data between devices/users or whatever, you can use local storage. But shared preferences should be used to store small data, key-value data only. If you want to store more complex data and more data in general, use sqlite(https://developer.android.com/training/data-storage/room).
As for the billing, if price is an issue you can always setup your own http server with a postgresql database for example.
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