Fragments

Fragments Doc 1.0

Summary

Some fragments. Most common use is fragment open on navigation drawer selection.

FoodFragment.java

Inflates layout with two horizontally scrolling RecyclerViews for displaying DiningHall and Cafe cards.

        // set up dining hall RecyclerView
        mDiningRecyclerView = (RecyclerView) layout.findViewById(R.id.dining_hall_recycler_view);
        mDiningRecyclerView.setHasFixedSize(true);
        mDiningRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.HORIZONTAL, false));
        mDiningHallList = new ArrayList<>();
        mDiningRecyclerView.setAdapter(new FoodPlaceAdapter(getContext(), mDiningHallList, FoodPlaceAdapter.FoodType.DiningHall));

        // set up cafe RecyclerView
        mCafeRecyclerView = (RecyclerView) layout.findViewById(R.id.cafe_recycler_view);
        mCafeRecyclerView.setHasFixedSize(true);
        mCafeRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity(), LinearLayoutManager.HORIZONTAL, false));
        mCafeList = new ArrayList<>();
        mCafeRecyclerView.setAdapter(new FoodPlaceAdapter(getContext(), mCafeList, FoodPlaceAdapter.FoodType.Cafe));

Clicking on RecylerView components will launch OpenCafeActivity or OpenDiningHallActivity accordingly. For details, see the corresponding adapters.

Fetches information from the backend asynchronously by using enqueue, making UI prompts accordingly with refresh button and toasts.

    private void getDining() {

        mDiningHallsCall.enqueue(new retrofit2.Callback<DiningHallsResponse>() {
             @Override
             public void onResponse(Call<DiningHallsResponse> call, Response<DiningHallsResponse> response) {

                mDiningHallList = (List<FoodPlace>) response.body().getDiningHalls();

                mDiningHallLabel.setVisibility(View.VISIBLE);
                mDiningRecyclerView.setVisibility(View.VISIBLE);
                mProgressBar.setVisibility(View.GONE);
                mDiningRecyclerView.setAdapter(new FoodPlaceAdapter(getContext(), mDiningHallList, FoodPlaceAdapter.FoodType.DiningHall));

             }

             @Override
             public void onFailure(Call<DiningHallsResponse> call, Throwable t) {
                mProgressBar.setVisibility(View.GONE);
                mRefreshWrapper.setVisibility(View.VISIBLE);
                Toast.makeText(getContext(), "Unable to retrieve dining hall data, please try again",
                        Toast.LENGTH_SHORT).show();
             }
         });
    }