temp.java

Main Activity


public class MainActivity extends AppCompatActivity implements MaterialTabListener {


   
    private MaterialTabHost tabHost;
    private ViewPager viewPager;
    

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_product);
        
      
        setUpMaterialTab();
        
       
    }


    private void setUpMaterialTab(){


        tabHost = (MaterialTabHost) findViewById(R.id.material_tabs);
        viewPager = (ViewPager) findViewById(R.id.material_tab_view_pager);

        MaterialTabPagerAdapter adapter = new MaterialTabPagerAdapter(getSupportFragmentManager());

        viewPager.setAdapter(adapter);
        viewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
            @Override
            public void onPageSelected(int position) {
                // when user do a swipe the selected tab change
                tabHost.setSelectedNavigationItem(position);
               
                if(position == Constants.FAVORITES) {
                   //adapter.notifyDataSetChanged();
                }



            }

        });

        for (int i = 0; i < adapter.getCount(); i++) {
            tabHost.addTab(
                    tabHost.newTab()
                            .setText(adapter.getPageTitle(i))
                            .setTabListener(this)
            );
        }

    }

    @Override
    public void onTabSelected(MaterialTab tab) {
        // when the tab is clicked the pager swipe content to the tab position
        viewPager.setCurrentItem(tab.getPosition());
        //Toast.makeText(getApplicationContext(),"onTabSelected" + tab ,Toast.LENGTH_SHORT).show();

        if(tab.getPosition() == Constants.FAVORITES){
            LocalBroadcastManager localBroadcastManager = LocalBroadcastManager.getInstance(this);
            Intent intent = new Intent(Constants.FAVORITES_TAB_SELECTED);
            localBroadcastManager.sendBroadcast(intent);
        }


    }

    @Override
    public void onTabReselected(MaterialTab tab) {
        viewPager.setCurrentItem(tab.getPosition());
    }

    @Override
    public void onTabUnselected(MaterialTab tab) {

        if(tab.getPosition() == Constants.FAVORITES){
            LocalBroadcastManager localBroadcastManager = LocalBroadcastManager.getInstance(this);
            Intent intent = new Intent(Constants.FAVORITES_TAB_UN_SELECTED);
            localBroadcastManager.sendBroadcast(intent);
        }
    }




    /****************
     * Inner class decelerations
     ****************/


    public class MaterialTabPagerAdapter extends FragmentStatePagerAdapter {


        String[] materialTabTitles;

        public MaterialTabPagerAdapter(FragmentManager fm) {

            super(fm);
            materialTabTitles = getResources().getStringArray(R.array.material_tab_titles);

        }

        @Override
        public CharSequence getPageTitle(int position) {

            return materialTabTitles[position];

        }

        @Override
        public Fragment getItem(int position) {

            Fragment fragment = null;

            switch (position) {
                case TAB_A:

                    fragment = TAB_A_Fragment.getInstance(position);

                    break;

                case TAB_B:

                    fragment = TAB_B_Fragment.getInstance(position);


                    break;

                case TAB_C:

                    fragment = TAB_C_Fragment.getInstance(position);

                    break;

            }

            return fragment;
        }

        @Override
        public int getCount() {
            return 3;
        }
    }


}




TAB_A_Fragment

public class TAB_A_Fragment extends Fragment {

    ProductRecyclerAdapter adapter;
    TextView volleyError;
    ProductReceiver ProductReceiver;
    
    private RecyclerView productRecyclerView;
    private ArrayList<Product> productArrayList;
  

    public static TAB_A_Fragment getInstance(int position) {

        TAB_A_Fragment TAB_A_fragment = new TAB_A_Fragment();

        Bundle bundleArguments = new Bundle();
        bundleArguments.putInt("position", position);
        productListFragment.setArguments(bundleArguments);

        return productListFragment;

    }



    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putParcelableArrayList("products", productArrayList);
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }

    private void sendJSONRequest() {
        
	// get Data from server

    }


    public void refresh() {
        if (productArrayList != null){
            
            adapter = new ProductRecyclerAdapter(getActivity());
            productRecyclerView.setAdapter(adapter);
            adapter.setData(productArrayList);
        }
    }

    public void onPause() {
        super.onPause();
        LocalBroadcastManager.getInstance(getContext()).unregisterReceiver(productReceiver);
    }

    public void onResume() {
        super.onResume();
        productReceiver = new pProductReceiver();
        LocalBroadcastManager.getInstance(getContext()).registerReceiver(productReceiver,new IntentFilter(Constants.FAVORITES_TAB_UN_SELECTED));
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View layout = inflater.inflate(R.layout.fragment_product_list, container, false);

        productRecyclerView = (RecyclerView) layout.findViewById(R.id.product_recycler_list);


        // set the layout manager before trying to display data
        productRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

        adapter = new ProductRecyclerAdapter(getActivity());
        productRecyclerView.setAdapter(adapter);


        if (savedInstanceState != null) {
            productArrayList = savedInstanceState.getParcelableArrayList("products");
            adapter.setData(productArrayList);
        } else {
            sendJSONRequest();
        }

        return layout;
    }


   
    private class ProductReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            ProductListFragment.this.refresh();
        }
    }

}


ProductListFragment

public class ProductRecyclerAdapter extends RecyclerView.Adapter<ProductRecyclerAdapter.pPoductViewHolder> {

    List<pProduct> productList = new ArrayList<>();
    FavoritepProductSharedPreference favoriteProductSharedPreference;
    private LayoutInflater layoutInflater;
    private Context context;
    


    public ProductRecyclerAdapter(Context context) {

        layoutInflater = LayoutInflater.from(context);
        
        this.context = context;
        favoriteProductSharedPreference = new FavoriteProductSharedPreference();
    }




    @Override
    public PoductViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view = layoutInflater.inflate(R.layout.product_recycler_list_item, parent, false);
        pProductViewHolder productViewHolder = new ProductViewHolder(view);
        return productViewHolder;

    }

    @Override
    public void onBindViewHolder(final pProductViewHolder holder, final int position) {

        final Product productData = productList.get(position);

        holder.name.setText(productData.getNickname());

       

        // When Recycle list load set favorite flags and update model
        // If a product exists or not in shared preferences then set favorite on or off drawable

        if (favoriteProductSharedPreference.checkFavoriteItem(productList.get(position).getProductId(), context)) {
            productData.setFavorite(Constants.FAVORITE_ICON_ON);
            holder.favoriteProductImg.setImageResource(R.drawable.ic_favorite_on);
        } else {
            productData.setFavorite(Constants.FAVORITE_ICON_OFF);
            holder.favoriteProductImg.setImageResource(R.drawable.ic_favorite_off);
        }


        //Set Other data


        
        holder.favoriteProductImg.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if (productData.getFavorite() == Constants.FAVORITE_ICON_OFF) {


                    favoriteProductSharedPreference.addFavoriteProducts(context, productList.get(position), productList.get(position).getProductId());
               
                    productData.setFavorite(Constants.FAVORITE_ICON_ON);
                    holder.favoriteProductImg.setImageResource(R.drawable.ic_favorite_on);


                } else {

                    favoriteProductSharedPreference.removeFavoriteProducts(context, productList.get(position), productList.get(position).getProductId());
        
                    productData.setFavorite(Constants.FAVORITE_ICON_OFF);
                    holder.favoriteProductImg.setImageResource(R.drawable.ic_favorite_off);


                }

            }
        });


    }

    @Override
    public int getItemCount() {
        return productList.size();
    }


    public void setData(ArrayList<Product> productList) {
        this.productList = productList;
        notifyItemRangeChanged(0, productList.size());
    }

    

    public class ProductViewHolder extends RecyclerView.ViewHolder {

        

        TextView name;
        

        public ProductViewHolder(View itemView) {
            super(itemView);

            name = (TextView) itemView.findViewById(R.id.name);
            // other data
            favoriteProductImg = (ImageView) itemView.findViewById(R.id.favorite_product);

        }

    }
}

Tab_B_Fragment

public class Tab_B_FragmentFragment extends Fragment {


    FavoriteProductRecyclerAdapter adapter;
    FavoriteProductSharedPreference favoriteProductSharedPreference;
    FavoriteProductReceiver favoriteProductReceiver;
    private RecyclerView favoriteProductRecyclerView;
    private ArrayList<Product> favoriteProduct;
    private TextView emptyView;

    public static FavoriteProductListFragment getInstance(int position) {

        FavoriteProductListFragment favoritesFragment = new FavoriteProductListFragment();

        Bundle bundleArguments = new Bundle();
        bundleArguments.putInt("position", position);
        favoritesFragment.setArguments(bundleArguments);

        return favoritesFragment;
    }

    public void refresh() {

        if (favoriteProduct != null){
            favoriteProduct = favoriteProductSharedPreference.getAllFavoriteProducts(getActivity());
            adapter = new FavoriteProductRecyclerAdapter(getActivity());
            favoriteProductRecyclerView.setAdapter(adapter);
            adapter.setData(favoriteProduct);
        }
    }

    public void onPause() {
        super.onPause();
        LocalBroadcastManager.getInstance(getContext()).unregisterReceiver(favoriteProductReceiver);
    }

    public void onResume() {
        super.onResume();
        favoriteProductReceiver = new FavoriteProductReceiver();
        LocalBroadcastManager.getInstance(getContext()).registerReceiver(favoriteProductReceiver,new IntentFilter(Constants.FAVORITES_TAB_SELECTED));

    }

    @Override
    public void onStart() {
        super.onStart();
        favoriteProductReceiver = new FavoriteProductReceiver();
        LocalBroadcastManager.getInstance(getContext()).registerReceiver(favoriteProductReceiver,new IntentFilter(Constants.FAVORITES_TAB_SELECTED));
    }

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        // Inflate the layout for this fragment

   

        favoriteProductSharedPreference = new FavoriteProductSharedPreference();
        favoriteProduct = favoriteProductSharedPreference.getAllFavoriteProducts(getActivity());


        View layout = inflater.inflate(R.layout.fragment_favorites_list, container, false);
        favoriteProductRecyclerView = (RecyclerView) layout.findViewById(R.id.product_favorite_recycler_list);
        emptyView = (TextView) layout.findViewById(R.id.empty_view);


        if (favoriteProduct == null) {
            Toast.makeText(getContext(),"No Favorites",Toast.LENGTH_SHORT).show();
            favoriteProductRecyclerView.setVisibility(View.GONE);
            emptyView.setVisibility(View.VISIBLE);
        }
        else {
            favoriteProductRecyclerView.setVisibility(View.VISIBLE);
            emptyView.setVisibility(View.GONE);
            Toast.makeText(getContext(),"Have Favorites begin",Toast.LENGTH_SHORT).show();
            favoriteProductRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

            adapter = new FavoriteProductRecyclerAdapter(getActivity());
            favoriteProductRecyclerView.setAdapter(adapter);
            adapter.setData(favoriteProduct);
        }

        return layout;
    }

    private class FavoriteProductReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            FavoriteProductistFragment.this.refresh();
        }
    }

}

FavoriteProductRecyclerAdapter 

public class FavoriteProductRecyclerAdapter extends RecyclerView.Adapter<FavoriteProductRecyclerAdapter.ProductViewHolder> {

    List<Product> productList = new ArrayList<>();
    FavoriteProductSharedPreference favoriteProductSharedPreference;
    private LayoutInflater layoutInflater;
    private Context context;
    
    public FavoriteProductRecyclerAdapter(Context context) {

        layoutInflater = LayoutInflater.from(context);
        
        this.context = context;
        favoriteProductSharedPreference = new FavoriteProductSharedPreference();
    }

    @Override
    public ProductViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View view = layoutInflater.inflate(R.layout.product_recycler_list_item, parent, false);
        ProductViewHolder productViewHolder = new ProductViewHolder(view);
        return ProductViewHolder;

    }



    @Override
    public void onBindViewHolder(final ProductViewHolder holder, final int position) {

        inal Product productData = productList.get(position);

        holder.name.setText(productData.getNickname());

       

        // When Recycle list load set favorite flags and update model
        // If a product exists or not in shared preferences then set favorite on or off drawable

        if (favoriteProductSharedPreference.checkFavoriteItem(productList.get(position).getProductId(), context)) {
            productData.setFavorite(Constants.FAVORITE_ICON_ON);
            holder.favoriteProductImg.setImageResource(R.drawable.ic_favorite_on);
        } else {
            productData.setFavorite(Constants.FAVORITE_ICON_OFF);
            holder.favoriteProductImg.setImageResource(R.drawable.ic_favorite_off);
        }


        //Set Other data

        holder.favoriteProductImg.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                if (productData.getFavorite().equals(Constants.FAVORITE_ICON_ON)) {
                    Product conData;
                    if(productList.size() != 0 ){
                        conData  = productList.get(position);
                        favoriteProductSharedPreference.removeFavoriteProduct(context, productList.get(position), productList.get(position).getProductId());
                        Toast.makeText(context, R.string.removed_from_favorite_list, Toast.LENGTH_SHORT).show();
                        productData.setFavorite(Constants.FAVORITE_ICON_OFF);
                        removeItem(position, conData);
                        notifyItemRemoved(position);
                    }


                }

            }
        });


    }

    private void removeItem(int position , Product conData) {
       productList.remove(position);

    }


    @Override
    public int getItemCount() {

        if(productList == null){
            return 0;
        } else {
            return productList.size();
        }

    }


    public void setData(ArrayList<Product>productList) {
        this.ProductList = productList;

    }

    private void loadImages(final ProductViewHolder productViewHolder, String avatarImageUrl) {
        if (!avatarImageUrl.equals(Constants.STRING_NA)) {

            imageLoader.get(avatarImageUrl, new ImageLoader.ImageListener() {
                @Override
                public void onResponse(ImageLoader.ImageContainer response, boolean isImmediate) {
                    productViewHolder.avatarImage.setImageBitmap(response.getBitmap());
                }

                @Override
                public void onErrorResponse(VolleyError error) {

                }
            });
        }


    }

    public class ProductViewHolder extends RecyclerView.ViewHolder {

        TextView name;
        

        public ProductViewHolder(View itemView) {
            super(itemView);

            name = (TextView) itemView.findViewById(R.id.name);
            // other data
            favoriteProductImg = (ImageView) itemView.findViewById(R.id.favorite_product);

        }

    }
}