Code example

FavoritesFragment

package com.stylezappmen.android.fragments;


import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.costum.android.widget.LoadMoreListView;
import com.stylezappmen.android.R;
import com.stylezappmen.android.activities.SingleProductActivity;
import com.stylezappmen.android.adapters.list.ProductsListAdapter;
import com.stylezappmen.android.enums.DialogType;
import com.stylezappmen.android.interfaces.DialogCallbacks;
import com.stylezappmen.android.interfaces.IRequestableDefaultImpl;
import com.stylezappmen.android.interfaces.ProductInteractionDefaultImpl;
import com.stylezappmen.android.interfaces.ProgressCallbacks;
import com.stylezappmen.android.models.Product;
import com.stylezappmen.android.network.API;
import com.stylezappmen.android.utils.ConstantUtils;

import java.util.ArrayList;
import java.util.Arrays;

/**
 * A simple {@link Fragment} subclass.
 */
public class FavoritesFragment extends Fragment {

    private static final String MAX_PAGE_COUNT = "max_page_count";

    protected LoadMoreListView favoritesList;
    protected RelativeLayout blankContainer;
    protected TextView blankText;
    protected ImageView blankImage;
    protected ProductsListAdapter adapter;
    protected DialogCallbacks dialogCallbacks;
    protected ProgressCallbacks progressCallbacks;
    int page = 1;
    int maxPageCount;

    public FavoritesFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        adapter = new ProductsListAdapter(getActivity());
        adapter.setFavorite(true);
        setHasOptionsMenu(true);

        if (savedInstanceState != null)
            maxPageCount = savedInstanceState.getInt(MAX_PAGE_COUNT);
    }


    @Override
    public void onSaveInstanceState(Bundle outState) {
        outState.putInt(MAX_PAGE_COUNT, maxPageCount);
        super.onSaveInstanceState(outState);
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        dialogCallbacks = (DialogCallbacks) activity;
        progressCallbacks = (ProgressCallbacks) activity;
    }

    @Override
    public void onDetach() {
        super.onDetach();
        progressCallbacks.hideLoader();
        dialogCallbacks = null;
        progressCallbacks = null;
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);
        inflater.inflate(R.menu.menu_favorites, menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_email:
                dialogCallbacks.showDialog(DialogType.NOTIFIED, "");
                break;
            case R.id.action_dislike_all:
                progressCallbacks.showLoader();
                API.dislikeAll(new IRequestableDefaultImpl(getActivity(), this) {
                    @Override
                    public void completed(Object... params) {
                        if (isAdded())
                            getActivity().runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    progressCallbacks.hideLoader();
                                    adapter.swap(new ArrayList<>());

                                    renderProducts();
                                }
                            });
                    }
                });
                break;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_favorites, container, false);
        blankContainer = (RelativeLayout) view.findViewById(R.id.blank_container);
        favoritesList = (LoadMoreListView) view.findViewById(R.id.products_list);
        blankText = (TextView) view.findViewById(R.id.blank_text);
        blankImage = (ImageView) view.findViewById(R.id.blank_image);

        favoritesList.setAdapter(adapter);

        favoritesList.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Product product = (Product) adapter.getItem(position);
                startActivity(new Intent(getActivity(), SingleProductActivity.class).putExtra(SingleProductActivity.PRODUCT_EXTRA, product));
            }
        });

        adapter.setOnProductInteractionListener(new ProductInteractionDefaultImpl() {
            @Override
            public void onRemove(final int position) {
                Product product = (Product) adapter.getItem(position);
                progressCallbacks.showLoader();
                API.dislike(product.id, new IRequestableDefaultImpl(getActivity(), FavoritesFragment.this) {
                    @Override
                    public void completed(Object... params) {
                        getActivity().runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                progressCallbacks.hideLoader();
                                adapter.remove(position);

                                renderProducts();
                            }
                        });
                    }
                });
            }

            @Override
            public void onShare(int position) {
                Product product = (Product) adapter.getItem(position);
                dialogCallbacks.showDialog(DialogType.SHARE, product.shareText);
            }
        });


//        ArrayList<Product> products = new ArrayList<>();
//        for (int i = 0; i < 10; i++) {
//            Product product = new Product(UUID.randomUUID().toString(), R.drawable.ic_jacket, i + 188.90, i + 220.50, "Suede Bomber Blue Jacket for Men 2015", "ARMANI");
//            products.add(product);
//        }
//        adapter.swap(products);

        loadFavorites(false);

        favoritesList.setOnLoadMoreListener(new LoadMoreListView.OnLoadMoreListener() {
            @Override
            public void onLoadMore() {
                if (page < maxPageCount) {
                    page++;
                    loadFavorites(true);
                }
            }
        });

        return view;
    }

    private void loadFavorites(boolean isLoadMore) {
        if (isAdded()) {
            if (!isLoadMore)
                progressCallbacks.showLoader();

            API.products("/my", page, new IRequestableDefaultImpl(getActivity(), this) {
                @Override
                public void completed(final Object... params) {
                    if (isAdded())
                        getActivity().runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                progressCallbacks.hideLoader();
                                ArrayList<Product> products = new ArrayList<>(Arrays.asList((Product[]) params[0]));
                                adapter.addAllProducts(products);
                                favoritesList.onLoadMoreComplete();
                                renderProducts();
                                maxPageCount = (Integer) params[2];
                                favoritesList.setShouldLoadMore(page < maxPageCount);
                            }
                        });
                }

                @Override
                public void failed(Object... params) {
                    super.failed(params);
                    if (isAdded())
                        getActivity().runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                favoritesList.onLoadMoreComplete();
                            }
                        });
                }
            });
        }
    }

    private void renderProducts() {
        if (adapter.getCount() > 0) {
            favoritesList.setVisibility(View.VISIBLE);
            blankContainer.setVisibility(View.GONE);
            setMenuVisibility(true);
        } else {
            setMenuVisibility(false);
            favoritesList.setVisibility(View.GONE);
            blankContainer.setVisibility(View.VISIBLE);
            blankText.setText(getString(R.string.blank_favorites));
            blankImage.setImageResource(ConstantUtils.IS_MALE ? R.drawable.ic_not_liked_men : R.drawable.ic_not_liked);
        }
    }

}

ProductsListAdapter

package com.stylezappmen.android.adapters.list;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.squareup.picasso.Picasso;
import com.stylezappmen.android.R;
import com.stylezappmen.android.interfaces.OnProductInteractionListener;
import com.stylezappmen.android.models.Product;
import com.stylezappmen.android.utils.ConstantUtils;

import java.util.Collection;

/**
 * Created by qq on 27.03.2015.
 */
public class ProductsListAdapter extends BaseListAdapter {

    boolean isFavorite;
    OnProductInteractionListener onProductInteractionListener;

    public void setFavorite(boolean isFavorite) {
        this.isFavorite = isFavorite;
    }

    public void setOnProductInteractionListener(OnProductInteractionListener onProductInteractionListener) {
        this.onProductInteractionListener = onProductInteractionListener;
    }

    public ProductsListAdapter(Activity context) {
        super(context);
    }

    public void addAllProducts(Collection<?> products) {
        items.addAll(products);
        notifyDataSetChanged();
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            LayoutInflater inflater = context.get().getLayoutInflater();
            convertView = inflater.inflate(R.layout.product_list_item, parent, false);
        }

        Product product = (Product) getItem(position);
        ImageView productImage = (ImageView) convertView.findViewById(R.id.product_image);
        TextView productName = (TextView) convertView.findViewById(R.id.product_name);
        TextView productBrand = (TextView) convertView.findViewById(R.id.product_brand);
        TextView productCost = (TextView) convertView.findViewById(R.id.product_cost);
        ImageView remove = (ImageView) convertView.findViewById(R.id.remove_product);
        ImageView share = (ImageView) convertView.findViewById(R.id.share_product);
        ImageView like = (ImageView) convertView.findViewById(R.id.like_product);

        if (isFavorite) {
            like.setVisibility(View.GONE);
            remove.setVisibility(View.VISIBLE);
            remove.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (onProductInteractionListener != null)
                        onProductInteractionListener.onRemove(position);
                }
            });
        } else {
            remove.setVisibility(View.GONE);
            like.setVisibility(View.VISIBLE);
            if (product.status.equals("liked"))
                like.setImageResource(ConstantUtils.IS_MALE ? R.drawable.ic_like_men : R.drawable.ic_like);
            else
                like.setImageResource(ConstantUtils.IS_MALE ? R.drawable.ic_not_liked_men : R.drawable.ic_not_liked);

            like.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (onProductInteractionListener != null)
                        onProductInteractionListener.onLike(position);
                }
            });
        }

        share.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (onProductInteractionListener != null)
                    onProductInteractionListener.onShare(position);
            }
        });


        productName.setText(product.name);
        productBrand.setText(product.brand);
        productCost.setText("$" + product.cost);

        Picasso.with(context.get())
                .load(product.image)
//                .resizeDimen(R.dimen.image_size, R.dimen.image_size)
//                .centerCrop()
                .into(productImage);

        return convertView;
    }

}