MainPodcastFragment.java

package se.slide.sgu;

import android.app.ActionBar;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;

import se.slide.sgu.animations.ScaleFadePageTransformer;
import se.slide.sgu.animations.ZoomOutPageTransformer;

import java.util.Locale;

public class MainPodcastFragment extends Fragment implements ActionBar.OnNavigationListener {
    
    private final String TAG = "MainPodcastFragment";
    
    private SectionsPagerAdapter                mSectionsPagerAdapter;
    private ViewPager                           mViewPager;
    
    final String[] actions = new String[] {
            "Ad Free",
            "Premium"
    };
    
    public MainPodcastFragment() {
        
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        MyLog.v(TAG, "onCreateView");
        
        View view = inflater.inflate(R.layout.fragment_viewpager, null);
        
        mSectionsPagerAdapter = new SectionsPagerAdapter(getChildFragmentManager());

        mViewPager = (ViewPager) view.findViewById(R.id.pager);
        mViewPager.setAdapter(mSectionsPagerAdapter);
        mViewPager.setPageTransformer(true, new ZoomOutPageTransformer());
        
        final ActionBar actionBar = getActivity().getActionBar();
        
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_spinner_dropdown_item, actions);
        
        actionBar.setTitle("");
        actionBar.setDisplayHomeAsUpEnabled(false);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
        actionBar.setListNavigationCallbacks(adapter, this);
        
        mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
            @Override
            public void onPageSelected(int position) {
                actionBar.setSelectedNavigationItem(position);
            }
        });
        
        return view;
    }

    @Override
    public boolean onNavigationItemSelected(int itemPosition, long itemId) {
        if (itemPosition == 0) {
            mViewPager.setCurrentItem(0, true);
        }
        else if (itemPosition == 1) {
            mViewPager.setCurrentItem(1, true);
        }
                
        return false;
    }
    
    public void downloadCompleted() {
        String fragmentAdfree = makeFragmentName(mViewPager.getId(), 0);
        String fragmentPremium = makeFragmentName(mViewPager.getId(), 1);
        
        ContentFragment fragAdfree = (ContentFragment) getChildFragmentManager().findFragmentByTag(fragmentAdfree);
        ContentFragment fragPremium = (ContentFragment) getChildFragmentManager().findFragmentByTag(fragmentPremium);
        
        if (fragAdfree != null)
            fragAdfree.refresh();
        if (fragPremium != null)
            fragPremium.refresh();
    }
    
    public void notifyOfBinding() {
        String fragmentAdfree = makeFragmentName(mViewPager.getId(), 0);
        String fragmentPremium = makeFragmentName(mViewPager.getId(), 1);
        
        ContentFragment fragAdfree = (ContentFragment) getChildFragmentManager().findFragmentByTag(fragmentAdfree);
        ContentFragment fragPremium = (ContentFragment) getChildFragmentManager().findFragmentByTag(fragmentPremium);
        
        if (fragAdfree != null)
            fragAdfree.replaceCurrentlyPlayingContent();
        if (fragPremium != null)
            fragPremium.replaceCurrentlyPlayingContent();
    }
    
    /**
     * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
     * one of the sections/tabs/pages.
     */
    public class SectionsPagerAdapter extends FragmentPagerAdapter {

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

        @Override
        public Fragment getItem(int position) {
            MyLog.v(TAG, "getItem: " + position);
            
            Fragment fragment = new ContentFragment();
            
            Bundle args = new Bundle();
            
            if (position == 0)
                args.putInt(ContentFragment.CONTENT_MODE, ContentFragment.MODE_ADFREE);
            else
                args.putInt(ContentFragment.CONTENT_MODE, ContentFragment.MODE_PREMIUM);
            
            fragment.setArguments(args);
            //fragment.setRetainInstance(true);
            return fragment;
        }

        @Override
        public int getCount() {
            // Show 2 total pages.
            return 2;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            Locale l = Locale.getDefault();
            switch (position) {
                case 0:
                    return getString(R.string.tab_adfree).toUpperCase(l);
                case 1:
                    return getString(R.string.tab_premium).toUpperCase(l);
            }
            return null;
        }
    }
    
    private static String makeFragmentName(int viewId, int index) {
        return "android:switcher:" + viewId + ":" + index;
    }
}