How To Clear/remove All Items In Page List Adapter

I'm using the android paging library to show search result items, is there any way I can clear/remove all the loaded result items, Calling Invalidate on live Paged List refreshing

Solution 1:

If you're working with PagingDataAdapter, searchAdapter.submitData(lifecycle, PagingData.empty()) works

Solution 2:

submitting null clear the currently loaded page list

  productSearchResultItemAdapter.submitList(null)

Solution 3:

In Java:

I cleared all items on in PagedListAdapter by calling invalidate() on DataSource instance like that

publicvoidclear(){
   movieDataSource.invalidate();
}

Add this method in your ViewModel then call it in your activity

movieViewModel.clear();
movieAdapter.notifyDataSetChanged();

Then Load any data you want

You can see how I made it in my project.

Here is the Link: https://github.com/Marwa-Eltayeb/MovieTrailer

Solution 4:

In Fragment

lifecycleScope.launch {
                viewModel.currentResult = null
                viewModel.getSearchAudio(binding.etxtSearch.text.toString().trim(), 0).collectLatest { it ->
                    Log.v(mTAG, "Status: New record")
                    adapterAudioList.submitData(it)
                }
            }
               

In ViewModel

var currentResult: Flow<PagingData<AudioModel>>? = nullfungetSearchAudio(trackName: String, lastPageCount: Int): Flow<PagingData<AudioModel>> {
    val lastResult = currentResult
    if (lastResult != null) {
        return lastResult
    }
    val newResult: Flow<PagingData<AudioModel>> = videoRepository.getAudioSearchPaging(trackName, lastPageCount).cachedIn(viewModelScope)
    currentResult = newResult
    return newResult
}

In videoRepository

fungetAudioSearchPaging(trackName: String, lastPageCount: Int): Flow<PagingData<AudioModel>> {
    return Pager(
        config = PagingConfig(pageSize = KeyConstants.AUDIO_PAGE_SIZE, enablePlaceholders = false),
        pagingSourceFactory = { AudioSearchPagingSource(context, trackName, lastPageCount) },
    ).flow
}

Solution 5:

Before invalidate, clear your list data item. Like we did in simple way:

list.clear();
adapter.notifyDataSetChanged();