I gist for Low Wee.

forlowee.java

package com.benjamintanweihao.bookeesg.product;

import com.benjamintanweihao.bookeesg.R;

import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.text.method.ScrollingMovementMethod;
import android.util.Log;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.benjamintanweihao.bookeesg.home.HomeActivity;
import com.nlbservice.bookeesg.ArrayOfItem;
import com.nlbservice.bookeesg.CatalogueService;
import com.nlbservice.bookeesg.Credientials;
import com.nlbservice.bookeesg.GetAvailabilityInfoResponse;
import com.nlbservice.bookeesg.GetTitleDetailsResponse;
import com.nlbservice.bookeesg.Item;
import com.nlbservice.bookeesg.Modifiers;
import com.viewpagerindicator.TabPageIndicator;

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


public class ProductDetailsActivity extends FragmentActivity {
    private static final String[] CONTENT = new String[]{ "Availability", "Details", "Reviews" };

    ImageView productImageView;
    TextView titleTextView;
    ViewPager mViewPager;
    TabPageIndicator indicator;
    ProductDetailsFragmentAdapter mProductDetailsFragmentAdapter;
    CatalogueService catalogueService = new CatalogueService();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.product_details_tabs);

        mProductDetailsFragmentAdapter = new ProductDetailsFragmentAdapter(getSupportFragmentManager());

        mViewPager = (ViewPager) findViewById(R.id.pager);
        mViewPager.setAdapter(mProductDetailsFragmentAdapter);

        indicator = (TabPageIndicator) findViewById(R.id.indicator);
        indicator.setViewPager(mViewPager);

        productImageView = (ImageView) findViewById(R.id.productImageView);
        titleTextView = (TextView) findViewById(R.id.title_text_view);

        String isbn = getIntent().getStringExtra(HomeActivity.EXTRA_SCAN_RESULT);
        new GetTitleDetailsTask().execute(isbn);
        new SetCoverImageTask().execute(isbn);
        new GetAvailabilityInfoAsyncTask().execute(isbn);
    }

    class ProductDetailsFragmentAdapter extends FragmentPagerAdapter {

        private HashMap<Integer, Fragment> mPageReferenceMap = new HashMap<Integer, Fragment>();

        public ProductDetailsFragmentAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            if (position == 0) {
                Fragment f1 = ProductAvailabilityListFragment.newInstance();
                mPageReferenceMap.put(position, f1);
                return f1;
            } else if (position == 1) {
                Fragment f2 = ProductDetailsFragment.newInstance();
                mPageReferenceMap.put(position, f2);
                return f2;
            } else if (position == 2) {
                Fragment f3 = ProductAvailabilityListFragment.newInstance();
                mPageReferenceMap.put(position, f3);
                return f3;
            } else {
                // TODO: This needs to be retired eventually
                return TestFragment.newInstance(CONTENT[position % CONTENT.length]);
            }
        }

        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            mPageReferenceMap.remove(position);
            super.destroyItem(container, position, object);
        }


        public Fragment getFragmentByPosition(int position) {
            return mPageReferenceMap.get(position);
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return CONTENT[position % CONTENT.length].toUpperCase();
        }

        @Override
        public int getCount() {
            return CONTENT.length;
        }
    }

    private class SetCoverImageTask extends AsyncTask<String, Void, Bitmap> {
        @Override
        protected Bitmap doInBackground(String... isbns) {
            String isbn = isbns[0].toString();
            String url = "http://covers.openlibrary.org/b/isbn/" + isbn + "-M.jpg";
            return Utility.getBitmapFromURL(url);
        }

        @Override
        protected void onPostExecute(Bitmap bitmap) {
            productImageView.setImageBitmap(bitmap);
        }
    }

    private class GetTitleDetailsTask extends AsyncTask<String, Void, GetTitleDetailsResponse> {
        @Override
        protected GetTitleDetailsResponse doInBackground(String... isbns) {

            String isbn = isbns[0].toString();
            try {
                GetTitleDetailsResponse response = catalogueService.GetTitleDetails(Credientials.APIKEY, isbn);
                return response;

            } catch (Exception ex) {

            }
            return null;
        }

        @Override
        protected void onPostExecute(GetTitleDetailsResponse response) {
            if (response != null && response.TitleDetail != null) {
                if (response.TitleDetail.TitleName != null) {
                    titleTextView.setText(response.TitleDetail.TitleName);
                } else {
                    titleTextView.setText("N.A");
                }

                // Populate the [Details] tab
                Fragment detailsFragment = mProductDetailsFragmentAdapter.getFragmentByPosition(1);

                // FIXME: If rotate, everything goes to hell.
                TextView publisherTextView = (TextView) detailsFragment.getView().findViewById(R.id.product_details_publisher_text_view);
                TextView physicalDescriptionTextView = (TextView) detailsFragment.getView().findViewById(R.id.product_details_physical_description_text_view);
                TextView isbnTextView = (TextView) detailsFragment.getView().findViewById(R.id.product_details_isbn_text_view);
                TextView summaryTextView = (TextView)detailsFragment.getView().findViewById(R.id.product_details_summary_text_view);

                if (response.TitleDetail.Publisher != null) {
                    publisherTextView.setText(response.TitleDetail.Publisher);
                } else {
                    publisherTextView.setText("N.A");
                }

                if (response.TitleDetail.PhysicalDesc != null) {
                    physicalDescriptionTextView.setText(response.TitleDetail.PhysicalDesc);
                } else {
                    physicalDescriptionTextView.setText("N.A");
                }

                if (response.TitleDetail.ISBN != null) {
                    isbnTextView.setText(response.TitleDetail.ISBN);
                } else {
                    isbnTextView.setText("N.A");
                }

                if (response.TitleDetail.Summary != null) {
                    isbnTextView.setText(response.TitleDetail.ISBN);
                } else {
                    isbnTextView.setText("N.A");
                }


                TextView summaryTextView = (TextView)view.findViewById(R.id.product_details_summary_text_view);
                summaryTextView.setMovementMethod(ScrollingMovementMethod.getInstance());

            } else {
                // TODO: No result! Go back.
                Toast.makeText(getApplicationContext(), "No result!", Toast.LENGTH_LONG).show();
            }
        }
    }

    // TODO
    private class GetAvailabilityInfoAsyncTask extends AsyncTask<String, Void, GetAvailabilityInfoResponse> {
        @Override
        protected GetAvailabilityInfoResponse doInBackground(String... isbns) {
            String isbn = isbns[0].toString();
            Modifiers modifiers = new Modifiers();

            try {
                GetAvailabilityInfoResponse response = catalogueService.GetAvailabilityInfo(Credientials.APIKEY, isbn, modifiers);
            } catch (Exception ex) {

            }

            return null;
        }

        @Override
        protected void onPostExecute(GetAvailabilityInfoResponse response) {

            if (response != null) {
                ArrayOfItem items = response.Items;

                ArrayList<AvailiabilityInfo> availiabilityInfoList = new ArrayList<AvailiabilityInfo>();
                for(Item i : items) {

                    AvailiabilityInfo aInfo = new AvailiabilityInfo(i.BranchName, i.LocationDesc, i.StatusDesc, i.StatusDate, i.CallNumber);
                    availiabilityInfoList.add(aInfo);
                }

                // Populate the [Availability] tab
                AvailabilityInfoItemAdapter adapter = new AvailabilityInfoItemAdapter(getApplicationContext(), R.layout.availability_list_item, availiabilityInfoList);
                ProductAvailabilityListFragment listFragment = (ProductAvailabilityListFragment)mProductDetailsFragmentAdapter.getFragmentByPosition(0);
                ListView listView = listFragment.getListView();
                listView.setAdapter(adapter);
                adapter.notifyDataSetChanged();
            }
        }
    }
}