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6. Pagination

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Andrii Konovalenko edited this page Apr 12, 2017 · 3 revisions

The library offers you a mechanism for working with pagination without the need to explicitly control the request headers. Consider the sequence of actions for working with pagination in your project.

a) In App class call configurePagination method

 EasyNet.getInstance()
                .setDefaultNBuilderListener(new EasyNet.NBuilderDefaultListener() {
                    @Override
                    public Request defaultConfig(Request request) {
                        return request
                                .setHost(APIConfig.API_URL)
                                .configurePagination("offset", "limit");
                    }
                })

Specify the keys that your API uses for pagination.

b) Implement the PaginationInterface, for example in recycler adapter

public class NotesAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements 
         PaginationModel.PaginationInterface{
    private List<SomeModel> models;

    ...

    @Override
    public int getPaginationValue(String key) {
        switch (key) {
            case "limit":
                return 20;
            case "offset":
                return models.size();
            default:
                return 0;
        }
    }
}

c) Start the request with enablePagination(PaginationInterface) calling

EasyNet.get("path")
                .enablePagination(adapter)
                .start(new NCallbackGson<SomeModel>(SomeModel.class) {
                    @Override
                    public void onSuccess(List<SomeModel> models, NResponseModel responseModel) {
                        adapter.addAll(models);
                    }
                });

The library will be automatically send pagination headers with current counters.

Note!
I recommend use this library for dynamic lists https://github.com/jaksab/TrueRecyclerAdapter.

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