MainFragment.java

package com.simplecity.amp_library.ui.fragments;

import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;

import com.simplecity.amp_library.R;
import com.simplecity.amp_library.ui.activities.MainActivity;
import com.simplecity.amp_library.ui.adapters.PagerAdapter;
import com.simplecity.amp_library.ui.views.SlidingTabLayout;
import com.simplecity.amp_library.utils.ActionBarUtils;
import com.simplecity.amp_library.utils.ColorUtils;
import com.simplecity.amp_library.utils.DialogUtils;
import com.simplecity.amp_library.utils.ShuttleUtils;
import com.simplecity.amp_library.utils.ThemeUtils;

public class MainFragment extends BaseFragment {

    private static final String TAG = "MainFragment";

    private static final String GENRES_ORDER = "genres_order";
    private static final String SUGGESTED_ORDER = "suggested_order";
    private static final String ARTISTS_ORDER = "artists_order";
    private static final String ALBUMS_ORDER = "albums_order";
    private static final String SONGS_ORDER = "songs_order";
    private static final String FOLDERS_ORDER = "folders_order";
    private static final String PLAYLISTS_ORDER = "playlists_order";

    private static final String SHOW_GENRES = "show_genres";
    private static final String SHOW_SUGGESTED = "show_suggested";
    private static final String SHOW_ARTISTS = "show_artists";
    private static final String SHOW_ALBUMS = "show_albums";
    private static final String SHOW_SONGS = "show_songs";
    private static final String SHOW_FOLDERS = "show_folders";
    private static final String SHOW_PLAYLISTS = "show_playlists";

    private View dummyToolbar;
    private View dummyStatusBar;

    private SharedPreferences prefs;
    private SharedPreferences.OnSharedPreferenceChangeListener sharedPreferenceChangeListener;

    private int defaultPage;

    private PagerAdapter adapter;
    private SlidingTabLayout slidingTabLayout;
    private ViewPager pager;

    public MainFragment() {
    }

    public static MainFragment newInstance() {

        final MainFragment fragment = new MainFragment();
        final Bundle args = new Bundle();
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public void onAttach(Context context) {

        super.onAttach(context);
        ((MainActivity) context).onSectionAttached(getString(R.string.library_title));
    }

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

        prefs = PreferenceManager.getDefaultSharedPreferences(this.getActivity());

        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this.getActivity());

        boolean showGenres = prefs.getBoolean(SHOW_GENRES, true);
        boolean showSuggested = prefs.getBoolean(SHOW_SUGGESTED, true);
        boolean showArtists = prefs.getBoolean(SHOW_ARTISTS, true);
        boolean showAlbums = prefs.getBoolean(SHOW_ALBUMS, true);
        boolean showSongs = prefs.getBoolean(SHOW_SONGS, true);
        boolean showFolders = prefs.getBoolean(SHOW_FOLDERS, false);
        if (!ShuttleUtils.isUpgraded()) {
            showFolders = false;
        }
        boolean showPlaylists = prefs.getBoolean(SHOW_PLAYLISTS, false);

        int genresOrder = prefs.getInt(GENRES_ORDER, 0);
        int suggestedOrder = prefs.getInt(SUGGESTED_ORDER, 1);
        int artistsOrder = prefs.getInt(ARTISTS_ORDER, 2);
        int albumsOrder = prefs.getInt(ALBUMS_ORDER, 3);
        int songsOrder = prefs.getInt(SONGS_ORDER, 4);
        int foldersOrder = prefs.getInt(FOLDERS_ORDER, 5);
        int playlistsOrder = prefs.getInt(PLAYLISTS_ORDER, 6);

        adapter = new PagerAdapter(getChildFragmentManager());

        for (int i = 0; i < 8; i++) {
            if (genresOrder == i) {
                if (showGenres) {
                    adapter.addFragment(GenreFragment.newInstance(getString(R.string.genres_title)));
                }
            } else if (suggestedOrder == i) {
                if (showSuggested) {
                    adapter.addFragment(SuggestedFragment.newInstance(getString(R.string.suggested_title)));
                }
            } else if (artistsOrder == i) {
                if (showArtists) {
                    adapter.addFragment(AlbumArtistFragment.newInstance(getString(R.string.artists_title)));
                }
            } else if (albumsOrder == i) {
                if (showAlbums) {
                    adapter.addFragment(AlbumFragment.newInstance(getString(R.string.albums_title)));
                }
            } else if (songsOrder == i) {
                if (showSongs) {
                    adapter.addFragment(SongFragment.newInstance(getString(R.string.tracks_title)));
                }
            } else if (foldersOrder == i) {
                if (showFolders) {
                    adapter.addFragment(FolderFragment.newInstance(getString(R.string.folders_title)));
                }
            } else if (playlistsOrder == i) {
                if (showPlaylists) {
                    adapter.addFragment(PlaylistFragment.newInstance(getString(R.string.playlists_title)));
                }
            }
        }

        defaultPage = 2;

        String defaultPage = prefs.getString("pref_default_page", null);
        for (int i = 0; i < adapter.getCount(); i++) {
            if (adapter.getPageTitle(i).equals(defaultPage)) {
                this.defaultPage = i;
            }
        }
        if (this.defaultPage > adapter.getCount()) {
            if (adapter.getCount() > 3) {
                this.defaultPage = 2;
            } else {
                this.defaultPage = 0;
            }
        }

        sharedPreferenceChangeListener = (sharedPreferences, key) -> {
            if (key.equals("pref_theme_highlight_color") || key.equals("pref_theme_accent_color") || key.equals("pref_theme_white_accent")) {
                themeUIComponents();
            }
        };

        this.prefs.registerOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
    }

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

        View rootView = inflater.inflate(R.layout.fragment_main, container, false);

        pager = (ViewPager) rootView.findViewById(R.id.pager);
        pager.setAdapter(adapter);
        pager.setOffscreenPageLimit(adapter.getCount() - 1);
        pager.setCurrentItem(defaultPage);

        slidingTabLayout = (SlidingTabLayout) rootView.findViewById(R.id.tabs);
        ThemeUtils.themeTabLayout(getActivity(), slidingTabLayout);
        slidingTabLayout.setViewPager(pager);

        pager.postDelayed(() -> {
            if (pager != null) {
                DialogUtils.showRateSnackbar(getActivity(), pager);
            }
        }, 1000);

        dummyToolbar = rootView.findViewById(R.id.dummyToolbar);
        dummyStatusBar = rootView.findViewById(R.id.dummyStatusBar);

        //We need to set the dummy status bar height.
        if (ShuttleUtils.hasKitKat()) {
            LinearLayout.LayoutParams statusBarParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, (int) ActionBarUtils.getStatusBarHeight(getActivity()));
            dummyStatusBar.setLayoutParams(statusBarParams);
        } else {
            dummyStatusBar.setVisibility(View.GONE);
        }

        themeUIComponents();

        return rootView;
    }

    private void themeUIComponents() {

        if (dummyStatusBar != null) {
            //noinspection ResourceAsColor
            dummyStatusBar.setBackgroundColor(ShuttleUtils.hasLollipop() ? ColorUtils.getPrimaryColorDark(getContext()) : ColorUtils.getPrimaryColor());
        }

        if (dummyToolbar != null) {
            dummyToolbar.setBackgroundColor(ColorUtils.getPrimaryColor());
        }

        if (slidingTabLayout != null) {
            ThemeUtils.themeTabLayout(getActivity(), slidingTabLayout);
        }
        if (pager != null) {
            ThemeUtils.themeViewPager(pager);
        }
    }

    @Override
    public void onDestroy() {
        adapter.clear();
        prefs.unregisterOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);

        super.onDestroy();
    }

    public Fragment getCurrentFragment() {
        if (adapter == null || pager == null) {
            return null;
        }
        return adapter.getItem(pager.getCurrentItem());
    }

    @Override
    protected String screenName() {
        return TAG;
    }

}