Give users the ability to add, delete, modify and replace one item without rerendering all items, and give the user a better feeling by giving the recycler view the ability to animate changes.

I've used this in personal projects and it's pretty good: kudos to you for making it.

I now want to use this library in some commercial projects. However, without an explicit license I won't be able to due to my client's policies. Would you kindly mention the license by adding it on the root directory of this project?

I'm trying to use the lib and my list view is only displaying the first element.

RecyclerView recyclerView = (RecyclerView) findViewById(R.id.simple_recyclerview);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(this));

RxDataSource<SimpleViewModel> rxDataSource = new RxDataSource<>(generateSimpleList());

rxDataSource
	.<MyLayoutBinding>bindRecyclerView(recyclerView, R.layout.my_layout)
	.subscribe(viewHolder -> {
		MyLayoutBinding b = viewHolder.getViewDataBinding();
		SimpleViewModel x = viewHolder.getItem();
		b.simpleTextView.setText(x);
	});

The list is of 100 elements

	private List<SimpleViewModel> generateSimpleList() {
		List<SimpleViewModel> simpleViewModelList = new ArrayList<>();

		for (int i = 0; i < 100; i++) {
			simpleViewModelList.add(new SimpleViewModel(String.format(Locale.US, "This is item %d", i)));
		}

		return simpleViewModelList;
	}

SimpleViewModel

public class SimpleViewModel {
	private String simpleText;

	public SimpleViewModel(@NonNull final String simpleText) {
		Check.requireNonNull(simpleText);
		setSimpleText(simpleText);
	}

	@NonNull
	public String getSimpleText() {
		return simpleText;
	}

	public void setSimpleText(@NonNull final String simpleText) {
		Check.requireNonNull(simpleText);
		this.simpleText = simpleText;
	}
}

Hi @ahmedrizwan,

I'm relatively new to RxJava and also not an Android expert, so take this proposal with a grain of salt. I have a use-case where not all items of the RecyclerView are known in advance (Bluetooth devices that are discovered dynamically). AFAIS, this use case is not currently covered by RxRecyclerAdapter because all classes basically take a List<T> in advance and allow a certain set of operations on this list.

Now I was wondering why the classes in the library don't just accept a Observable<List<T>>. Then you wouldn't have to reimplement all those methods in RxDataSource because you could just pass an Observable which has all those operations applied already.

I've drafted a minimal working example here. Do you see any problems with that approach? Would this be worthy a direction to pursue in RxRecyclerAdapter, or should I rather create this as a separate project?

I follow you.And thanks a lot. You open my eyes. but how to set Adapter onItemClick event it ?please 。 like this? rxDataSource.repeat(1). bindRecyclerView(fragmentBinding.mGridView, R.layout.item_homepage_gridview) .subscribe(viewHolder -> { RelativeLayout.LayoutParams param = new RelativeLayout.LayoutParams(ViewGroup .LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); ItemHomepageGridviewBinding dataBinding = viewHolder.getViewDataBinding(); param.width=screenWidth/3; param.height = screenWidth/5; dataBinding.gridviewRoot.setLayoutParams(param); long itemId = viewHolder.getItemId(); String item = viewHolder.getItem(); if(itemId < lastCount){ Picasso.with(getActivity()).load(item).into(dataBinding.gridviewNetImage); }else{ dataBinding.gridviewNetImage.setImageResource(R.drawable.gridview_background); } dataBinding.getRoot().setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {

                    }
                });
            });

GitHub changed the way Markdown headings are parsed, so this change fixes it.

See bryant1410/readmesfix for more information.

Tackles bryant1410/readmesfix#1

I'm trying to combine this with RxPreferences. I have a List stored as shared preferences and every time this pref object gets updated I want the recycler view (using this library) to be updated as well. Think of Whatsapp chats example where when a new message comes it updated the list but all data it stored internally (shared prefs in this example).

I'm currently using this code to solve my problem (which kinda works perfectly):

val chatsPref = rxSharedPreferences.getObject("chats", emptyList(), ChatsPreferenceAdapter(gson))
val chats = chatsPref.get()
val rxDataSource = RxDataSource<ChatItemBinding, Chat>(R.layout.chat_item, chats)
disposables.add(
    rxDataSource.asObservable()
        .subscribe {
            val item = it.item!!
            val binding = it.viewDataBinding!!

            binding.tvMessage.text = item.message
        }
)

disposables.add(chatsPref.asObservable()
    .subscribe {
        rxDataSource.updateDataSet(it).updateAdapter()
    }
)

You can see that in this, I'm first extracting the initial value of chats using chatsPref.get() and then initializing my RxDataSource object using that and then in the last few lines, using the observable stream of the preference item to let the data source update. Is there a way I can cut down the lines to directly pass chatsPref.asObservable() into RxDataSource during initialization to avoid all these extra steps?

While looking at this example (Line 58), I thought a Consumer would be a better fit than using an override to react to an event. It would make this lib even more Rx!

Anyhow, I like this lib so far. I just think it deserves more documentation. Keep up the good work!

Sorry to ask, But I do have 2 question with RxReyclerAdapter,

1. How can we specific set data for many view in the viewholder, Ex. We have 1 ImageView, and Title, And Description.Support we use List, that contain 3 attribute for the list,
2. How to set event click for each row of the item in the viewholder, to get the index of position.

Hi, i have this code on my fragment:

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        fragmentHomeBinding = DataBindingUtil.inflate(LayoutInflater.from(getContext()), R.layout.fragment_home, container, false);
        fragmentHomeBinding.rv.setLayoutManager(new LinearLayoutManager(getContext()));
        fragmentHomeBinding.rv.setHasFixedSize(true);
        //Dummy DataSet
        mCompositeSubscription.add(HaipService.getMyPendingCampaigns()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .flatMap(campaigns -> {
                    pending = new RxDataSource<>(campaigns);
                    return pending.<MainItemBinding>bindRecyclerView(fragmentHomeBinding.rv, R.layout.main_item);
                })
                .doOnNext(campaignMainItemBindingSimpleViewHolder -> {
                    fragmentHomeBinding.rv.setAdapter(pending.getRxAdapter());
                })
                .subscribe(viewHolder -> {
                    MainItemBinding item = viewHolder.getViewDataBinding();
                    Campaign campaign = viewHolder.getItem();
                    Log.d("I'm here", campaign.getName());

                    Picasso.with(getContext()).load(campaign.getLogo()).fit().centerInside().into(item.brandImage);
                    Picasso.with(getContext()).load(campaign.getImage())
                            .fit().centerCrop().into(item.campaignImage);
                    item.brandName.setText(campaign.getName());
                    item.progressBar.setProgress(campaign.getCompleteStatus());
                    item.completedPercent.setText(String.valueOf(campaign.getCompleteStatus()) + "%");
                }, Throwable::printStackTrace));
        return fragmentHomeBinding.getRoot();

    }

but when I run the app, i'm only get

E/RecyclerView: No adapter attached; skipping layout

If I test the same code on an Activity, it works (changing DataBindingUtil.inflate by DataBindingUtil.setContentView).

Is this the correct way to bind a recyclerView inside a fragment?