kandi X-RAY | paging-library Summary
kandi X-RAY | paging-library Summary
paging-library
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Top functions reviewed by kandi - BETA
- Called when an options item is selected
- Generates a random list of random users
- Insert a user
- Delete a user
- Update a user
- Initializes the user model
- Init user list
- On createOptions menu
- Create a UserItemViewHolder from the layout
- Binds the user data to a user view
paging-library Key Features
paging-library Examples and Code Snippets
Community Discussions
Trending Discussions on paging-library
QUESTION
I've updated the following libraries:
...ANSWER
Answered 2021-Oct-14 at 19:43Use Paging 3.1.0-beta01 to fix, or revert Room back to stable 2.3.0.
The Paging library seems to have broken binary compatibility between 3.0.x and 3.1.0, and Room 2.4.0-alpha05+ is using the updated contract.
This is most likely related to the new room-paging library. They talk a lot about new paging interop requirements in the release notes, but I don't see anything which calls out strict version requirements. https://developer.android.com/jetpack/androidx/releases/room#2.4.0-beta01
QUESTION
I am using Paging library to get data from a webservice and display it in a recyclerview. However, I am not able to figure out a way to load initial data when the DataSource is loaded initially I am doing something similar to this tutorial.
...ANSWER
Answered 2021-Oct-12 at 17:08You weren't that specific about what you're trying to pass in, so I'll try to cover both scenarios briefly:
- You have some dynamic argument you need to pass based on UI context (e.g., linking to the middle of a thread):
The PagedList.Builder or any of its variants (LiveData, Rx, etc.), have an initialKey argument you can pass in on instantiation, which is passed to DataSource as the key in LoadParams. This needs to match the Key type of your DataSource (Int for PositionalDataSource, etc).
- You have some dependencies which aren't dynamic based on UI context.
You want to pass any dependencies via your DataSource's constructor, passing it through DataSource.Factory during .create().
Edit: Generally if you trying to send events from the UI upstream and react on this, you'll want to do a .switchMap. You didn't mention what architecture or post any code, but assuming you are using LiveData, it may look something like:
ViewModel.kt
QUESTION
I am following this tutorial by Raywenderlich on paging-library-for-android-with-kotlin on how to use android paging library. This is one of the easiest tutorials on the net and I have followed it thoroughly. However, I would like to make some changes so that I can intelligently switch between online data and offline data.
That is, I have old some posts in my database. Initially I have internet connection. So I load latest data from internet, then insert it into my database. Finally, I show this latest data in my recyclerView / PagedListAdapter. If for some reason, there is no internet connection after sometime, I should show the old posts from database.
How can I do this?
My attempts:This is my code on github repository.
Here, I tried to create a factory pattern. It checks if initially I have internet, the factory returns pagedList from online dataSource. ELse, the factory returns pagedList from offline dataSource. But this doesnot intelligently switch between the 2 states.
I tried some random codes such as creating a boundary callback. But I am not sure how to make the necessary changes. I am not adding codes here (at least for now) to keep it short and precise.
Can anyone help me?
Edit:To be specific, I am loading paged data primarily from network. If there is a network error, I don't want to show the user an error. Instead I load paged data from cache / database and continuously show it to my user as long as possible. If the network is back,switch back to network paged data. (that's what instagram / facebook does I think). What is the appropriate way to implement this? See my code / attemp in the answer.
...ANSWER
Answered 2020-Sep-29 at 12:15Okay, so after trying out some codes for 2 days, this is what I came up with. However, I really don't know if this is a good pratice or not. So I am open to any acceptable answers.
Explanation:Since I have multiple data sources(network and database), I created ProfilePostDataSource: PageKeyedDataSource, ProfilePost> here the key is a pair, the 1st one for network pagination, the 2nd one is for database pagination.
I used kotlin's Coroutine to write some asynchronous codes in a simple if-else like manner. So we can write it in a psudo-code like this:
QUESTION
Im trying to implement Paging but every time i rotate a screen constructor of view model gets called, thus triggering loadInitial to fetch new data from network in my DataSource class.Help appreciated
...ANSWER
Answered 2020-Jun-06 at 04:49You should never be calling through to the factory's create() method yourself.
Instead, you should be following the documentation and using ViewModelProvider:
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Install paging-library
You can use paging-library like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the paging-library component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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