Nested RecyclerViews.java

package com.application.freadom.activity.home;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.LinearSnapHelper;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.SnapHelper;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RadioButton;

import com.application.freadom.R;
import com.application.freadom.model.Category;
import com.application.freadom.model.CategoryList;
import com.application.freadom.model.Child;
import com.application.freadom.model.ChildLeaderboardModel;
import com.application.freadom.model.HomeModel;
import com.application.freadom.model.NewsFread;
import com.application.freadom.model.NewsfreadList;
import com.application.freadom.utils.ImageLoadingUtils;
import com.application.freadom.utils.Utils;
import com.application.freadom.widgets.AspectRatioImageView;
import com.application.freadom.widgets.FiraSansTextView;
import com.application.freadom.widgets.RadioGroupPlus;
import com.application.freadom.widgets.SpaceItemDecoration;
import com.bumptech.glide.Glide;
import com.bumptech.glide.Priority;
import com.bumptech.glide.request.RequestOptions;

import java.util.ArrayList;
import java.util.List;

import butterknife.BindView;
import butterknife.ButterKnife;


public class HomeFragmentAdapter extends RecyclerView.Adapter implements CategoryAdapter.Callbacks, NewsFreadHomeAdapter.Callbacks{

    public interface Callbacks {
        public void onCategoryClick(Category category);
        public void onNewsFreadClick(NewsFread newsFread);
        public void onLeaderboardClick();
    }

    private static final int VIEW_CATEGORY = 1;
    private static final int VIEW_NEWSFREAD = 2;
    private static final int VIEW_LEADERBOARD = 3;
    private static final int VIEW_FOOTER = 4;

    private Callbacks mCallbacks;
    private Context context;
    private List mFeedList;
    private HomeModel mHomeModel;
    private LayoutInflater mInflater;
    private RecyclerView.RecycledViewPool mRecycledViewPool;

    public HomeFragmentAdapter(HomeModel homeModel) {
        this.mHomeModel = homeModel;
        mRecycledViewPool = new RecyclerView.RecycledViewPool();
        mFeedList = processModel(mHomeModel);
        Log.e("size", "->"+getItemCount());
    }

    private List processModel(@NonNull final HomeModel model) {

        final ArrayList exploreCards = new ArrayList();

        // add category view
        if(model.getCategoryList()!=null && !model.getCategoryList().getCategories().isEmpty()) {
            Log.e("category", "->");
            exploreCards.add(model.getCategoryList());
        }

        // add newsfread view
        if(model.getNewsfreadList()!=null && !model.getNewsfreadList().getNewsFreads().isEmpty()) {
            Log.e("newsfread", "->");
            exploreCards.add(model.getNewsfreadList());
        }

        //add child leaderboard view
        if(model.getChildLeaderboardModel()!=null) {
            exploreCards.add(model.getChildLeaderboardModel());
        }

        // for footer
        exploreCards.add(null);

        return exploreCards;
    }

    @Override
    public int getItemViewType(final int position) {
        final Object item = mFeedList.get(position);

        if(item instanceof CategoryList) {
            return VIEW_CATEGORY;
        } else if (item instanceof NewsfreadList) {
            return VIEW_NEWSFREAD;
        } else if (item instanceof ChildLeaderboardModel) {
            return VIEW_LEADERBOARD;
        } else if(item == null){
            return VIEW_FOOTER;
        }
        throw new IllegalArgumentException("Unknown view type.");
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder (ViewGroup parent, int viewType) {
        context = parent.getContext();
        mInflater = LayoutInflater.from(context);
        switch (viewType) {
            case VIEW_CATEGORY:
                return createCategoryListViewHolder(parent);
            case VIEW_NEWSFREAD:
                return createNewsfreadListViewHolder(parent);
            case VIEW_LEADERBOARD:
                return createChildLeaderboardViewHolder(parent);
            case VIEW_FOOTER:
                return createFooterViewHolder(parent);
            default:
                throw new IllegalArgumentException("Unknown view type.");
        }
    }

    private @NonNull
    CategoryListViewHolder createCategoryListViewHolder(final ViewGroup parent) {
        CategoryListViewHolder holder = new CategoryListViewHolder(mInflater.inflate(R.layout.item_home_categories_view, parent, false));
        int columnCount = context.getResources().getInteger(R.integer.item_column);
        GridLayoutManager gridLayoutManager = new GridLayoutManager(context, columnCount);

        int spacing = Utils.dpToPx(0.5f, context);

        holder.categoriesRecyclerView.addItemDecoration(new SpaceItemDecoration(spacing));
        holder.categoriesRecyclerView.setLayoutManager(gridLayoutManager);
        holder.categoriesRecyclerView.setNestedScrollingEnabled(false);
        holder.categoriesRecyclerView.setRecycledViewPool(mRecycledViewPool);

        return holder;
    }

    private @NonNull
    NewsfreadListViewHolder createNewsfreadListViewHolder(final ViewGroup parent) {

        NewsfreadListViewHolder holder = new NewsfreadListViewHolder(mInflater.inflate(R.layout.item_home_newsfread_view, parent, false));

        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false);
        int spacing = Utils.dpToPx(5, context);
        holder.newsfreadRecyclerView.addItemDecoration(new SpaceItemDecoration(spacing));

        //snapping behaviour
        SnapHelper snapHelper = new LinearSnapHelper();
        snapHelper.attachToRecyclerView(holder.newsfreadRecyclerView);
        holder.newsfreadRecyclerView.setLayoutManager(linearLayoutManager);
        holder.newsfreadRecyclerView.setNestedScrollingEnabled(false);
        holder.newsfreadRecyclerView.setRecycledViewPool(mRecycledViewPool);
        return holder;
    }

    private @NonNull
    ChildLeaderboardViewHolder createChildLeaderboardViewHolder(final ViewGroup parent) {
        return new ChildLeaderboardViewHolder(mInflater.inflate(R.layout.item_child_leaderboard, parent, false));
    }

    private @NonNull
    FooterViewHolder createFooterViewHolder(final ViewGroup parent) {
        return new FooterViewHolder(mInflater.inflate(R.layout.item_home_footer, parent, false));
    }

    @Override
    public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {
        switch (getItemViewType(position)) {
            case VIEW_CATEGORY:
                bindCategoryList((CategoryListViewHolder) holder, (CategoryList) mFeedList.get(position)); break;
            case VIEW_NEWSFREAD:
                bindNewsfreadList((NewsfreadListViewHolder) holder, (NewsfreadList) mFeedList.get(position)); break;
            case VIEW_LEADERBOARD:
                bindChildLeaderboard((ChildLeaderboardViewHolder) holder, (ChildLeaderboardModel) mFeedList.get(position)); break;
            case VIEW_FOOTER:
                bindFooter((FooterViewHolder) holder, mFeedList.get(position)); break;
            default:
                throw new IllegalArgumentException("Unknown view type.");
        }
    }

    private void bindCategoryList(final CategoryListViewHolder holder, final CategoryList categoryList) {
        CategoryAdapter categoryAdapter = new CategoryAdapter(categoryList.getCategories());
        categoryAdapter.setCallbacks(this);
        holder.categoriesRecyclerView.setAdapter(categoryAdapter);
    }

    private void bindNewsfreadList(final NewsfreadListViewHolder holder, final NewsfreadList newsfreadList) {
        NewsFreadHomeAdapter newsFreadAdapter = new NewsFreadHomeAdapter(newsfreadList.getNewsFreads());
        newsFreadAdapter.setCallbacks(this);
        holder.newsfreadRecyclerView.setAdapter(newsFreadAdapter);
    }

    private void bindChildLeaderboard(final ChildLeaderboardViewHolder holder, final ChildLeaderboardModel childLeaderboardModel) {

        holder.mLeaderboardTitle.setText(R.string.leaderboard);

        if(childLeaderboardModel.getTopChild()!=null) {
            holder.topChildView.setVisibility(View.VISIBLE);

            ImageLoadingUtils.loadChildImage(holder.topChildImage, childLeaderboardModel.getTopChild());

            holder.topChildName.setText(childLeaderboardModel.getTopChild().getFullName());
            holder.topChildFreados.setText(String.valueOf(childLeaderboardModel.getTopChild().getFreadoPoints()));

        } else {
            holder.topChildView.setVisibility(View.GONE);
        }

        if(childLeaderboardModel.getChild()!=null) {
            holder.childView.setVisibility(View.VISIBLE);

            ImageLoadingUtils.loadChildImage(holder.childImage, childLeaderboardModel.getChild());

            holder.childImage.setBackgroundDrawable(ContextCompat.getDrawable(context, R.drawable.background_rounded_dotted));

            holder.childName.setText(childLeaderboardModel.getChild().getFullName());
            holder.childFreados.setText(String.valueOf(childLeaderboardModel.getChild().getFreadoPoints()));

        } else {
            holder.childView.setVisibility(View.GONE);
        }

        if(childLeaderboardModel.getNextChild()!=null) {
            holder.nextChildView.setVisibility(View.VISIBLE);

            ImageLoadingUtils.loadChildImage(holder.nextChildImage, childLeaderboardModel.getNextChild());

            holder.nextChildName.setText(childLeaderboardModel.getNextChild().getFullName());
            holder.nextChildFreados.setText(String.valueOf(childLeaderboardModel.getNextChild().getFreadoPoints()));

        } else {
            holder.nextChildView.setVisibility(View.GONE);
        }

        holder.itemView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(mCallbacks!=null)
                    mCallbacks.onLeaderboardClick();
            }
        });

    }

    private void bindFooter(final FooterViewHolder holder, final Object objects) {
    }

    @Override
    public void onCategoryClick(Category category) {
        if(mCallbacks!=null)
            mCallbacks.onCategoryClick(category);
    }

    @Override
    public void onNewsFreadClick(NewsFread newsFread) {
        if(mCallbacks!=null)
            mCallbacks.onNewsFreadClick(newsFread);
    }

    @Override
    public int getItemCount() {
        return (mFeedList!=null? mFeedList.size():0);
    }

    public void setCallbacks(Callbacks callbacks) {
        this.mCallbacks = callbacks;
    }

    public class CategoryListViewHolder extends RecyclerView.ViewHolder {

        @BindView(R.id.categoriesRecyclerView)
        RecyclerView categoriesRecyclerView;

        public CategoryListViewHolder(View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        }
    }

    public class NewsfreadListViewHolder extends RecyclerView.ViewHolder {

        @BindView(R.id.newsfreadRecyclerView)
        RecyclerView newsfreadRecyclerView;

        public NewsfreadListViewHolder(View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        }
    }

    public class ChildLeaderboardViewHolder extends RecyclerView.ViewHolder {

        @BindView(R.id.text_home_leaderboard_title)
        FiraSansTextView mLeaderboardTitle;
        @BindView(R.id.view_top_child)
        View topChildView;
        @BindView(R.id.view_child)
        View childView;
        @BindView(R.id.view_next_child)
        View nextChildView;
        @BindView(R.id.image_top_child)
        AspectRatioImageView topChildImage;
        @BindView(R.id.image_child)
        AspectRatioImageView childImage;
        @BindView(R.id.image_next_child)
        AspectRatioImageView nextChildImage;
        @BindView(R.id.text_top_child_name)
        FiraSansTextView topChildName;
        @BindView(R.id.text_child_name)
        FiraSansTextView childName;
        @BindView(R.id.text_next_child_name)
        FiraSansTextView nextChildName;
        @BindView(R.id.text_top_child_freados)
        FiraSansTextView topChildFreados;
        @BindView(R.id.text_child_freados)
        FiraSansTextView childFreados;
        @BindView(R.id.text_next_child_freados)
        FiraSansTextView nextChildFreados;
        @BindView(R.id.radio_group_child)
        RadioGroupPlus childRadioGroup;
        @BindView(R.id.radio_button_top_child)
        RadioButton topChildRadioButton;
        @BindView(R.id.radio_button_child)
        RadioButton childRadioButton;
        @BindView(R.id.radio_button_next_child)
        RadioButton nextChildRadioButton;

        public ChildLeaderboardViewHolder(View itemView) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        }
    }

    public class FooterViewHolder extends RecyclerView.ViewHolder {

        public FooterViewHolder(View itemView) {
            super(itemView);
        }
    }

}