Android Paging 3: How To Change Parameters Of Remotemediator

I am struggling with the Paging 3 Library of Jetpack. I setup Retrofit for the network API calls Room to store the retrieved data A repository that exposes the Pager.flow (see cod

Solution 1:

The overall output of Paging is a Flow<PagingData>, so typically mixing your signal (file path) into the flow via some flow-operation will work best. If you're able to model the path the user clicks on as a Flow<String>, something like this might work:

ViewModel.kt

classMyViewModel extends .. {
  valpathFlow= MutableStateFlow<String>("/")
  valpagingDataFlow= pathFlow.flatMapLatest { path ->
    Pager(
      remoteMediator = MyRemoteMediator(path)
      ...
    ).flow.cachedIn(..)
  }
}

RemoteMediator.kt

classMyRemoteMediatorextendsRemoteMediator<..> {
  overridesuspendfunload(..): .. {
    // If path changed or simply on whenever loadType == REFRESH, clear db.
  }
}

The other strategy if you have everything loaded is to pass the path directly into PagingSource, but it sounds like your data is coming from network so RemoteMediator approach is probably best here.