Java tutorial
/* * Copyright (C) 2014 Fastboot Mobile, LLC. * * This program is free software; you can redistribute it and/or modify it under the terms of the * GNU General Public License as published by the Free Software Foundation; either version 3 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along with this program; * if not, see <http://www.gnu.org/licenses>. */ package com.fastbootmobile.encore.app.adapters; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.os.RemoteException; import android.support.v4.app.FragmentActivity; import android.util.Log; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.BaseExpandableListAdapter; import android.widget.ImageView; import android.widget.PopupMenu; import android.widget.TextView; import com.fastbootmobile.encore.app.AlbumActivity; import com.fastbootmobile.encore.app.ArtistActivity; import com.fastbootmobile.encore.app.R; import com.fastbootmobile.encore.app.fragments.PlaylistChooserFragment; import com.fastbootmobile.encore.app.fragments.SearchFragment; import com.fastbootmobile.encore.app.ui.AlbumArtImageView; import com.fastbootmobile.encore.framework.PlaybackProxy; import com.fastbootmobile.encore.framework.PluginsLookup; import com.fastbootmobile.encore.art.RecyclingBitmapDrawable; import com.fastbootmobile.encore.framework.Suggestor; import com.fastbootmobile.encore.model.Album; import com.fastbootmobile.encore.model.Artist; import com.fastbootmobile.encore.model.BoundEntity; import com.fastbootmobile.encore.model.Playlist; import com.fastbootmobile.encore.model.SearchResult; import com.fastbootmobile.encore.model.Song; import com.fastbootmobile.encore.providers.IMusicProvider; import com.fastbootmobile.encore.providers.ProviderAggregator; import com.fastbootmobile.encore.providers.ProviderConnection; import com.fastbootmobile.encore.providers.ProviderIdentifier; import com.fastbootmobile.encore.utils.Utils; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; /** * Adapter that displays Search results in an Expandable ListView */ public class SearchAdapter extends BaseExpandableListAdapter { private static final String TAG = "SearchAdapter"; public final static int ARTIST = 0; public final static int ALBUM = 1; public final static int SONG = 2; public final static int PLAYLIST = 3; public final static int COUNT = 4; private int mMaxCount[] = new int[COUNT]; private List<SearchResult> mSearchResults; private List<SearchEntry> mAllSongs; private List<SearchEntry> mAllArtists; private List<SearchEntry> mAllPlaylists; private List<SearchEntry> mAllAlbums; private List<SearchEntry> mSortedSongs; private List<SearchEntry> mSortedArtists; private List<SearchEntry> mSortedPlaylists; private List<SearchEntry> mSortedAlbums; private final View.OnClickListener mOverflowArtistClickListener = new View.OnClickListener() { @Override public void onClick(View v) { ViewHolder vh = (ViewHolder) v.getTag(); Artist artist = (Artist) vh.content; showArtistOverflow(v.getContext(), v, artist); } }; private final View.OnClickListener mOverflowAlbumClickListener = new View.OnClickListener() { @Override public void onClick(View v) { ViewHolder vh = (ViewHolder) v.getTag(); Album album = (Album) vh.content; showAlbumOverflow(v.getContext(), v, album); } }; private final View.OnClickListener mOverflowPlaylistClickListener = new View.OnClickListener() { @Override public void onClick(View v) { ViewHolder vh = (ViewHolder) v.getTag(); Playlist playlist = (Playlist) vh.content; showPlaylistOverflow(v.getContext(), v, playlist); } }; private final View.OnClickListener mOverflowSongClickListener = new View.OnClickListener() { @Override public void onClick(View v) { ViewHolder vh = (ViewHolder) v.getTag(); Song song = (Song) vh.content; showSongOverflow(v.getContext(), v, song); } }; /** * Class representing search entries */ public class SearchEntry { SearchEntry(String ref, ProviderIdentifier id) { this.ref = ref; this.identifier = id; } public String ref; public ProviderIdentifier identifier; @Override public boolean equals(Object o) { if (o == null) { return false; } else if (o instanceof String) { return o.equals(ref); } else if (o instanceof BoundEntity) { return ref.equals(((BoundEntity) o).getRef()); } else if (o instanceof SearchEntry) { return ((SearchEntry) o).ref.equals(ref) && ((SearchEntry) o).identifier.equals(identifier); } return false; } } /** * Default constructor */ public SearchAdapter() { mSearchResults = new ArrayList<>(); mAllSongs = new ArrayList<>(); mAllArtists = new ArrayList<>(); mAllPlaylists = new ArrayList<>(); mAllAlbums = new ArrayList<>(); mSortedSongs = new ArrayList<>(); mSortedArtists = new ArrayList<>(); mSortedPlaylists = new ArrayList<>(); mSortedAlbums = new ArrayList<>(); for (int i = 0; i < COUNT; ++i) { mMaxCount[i] = 5; } } /** * Clear all the results from the adapter */ public void clear() { mSearchResults.clear(); mAllSongs.clear(); mAllArtists.clear(); mAllPlaylists.clear(); mAllAlbums.clear(); mSortedSongs.clear(); mSortedArtists.clear(); mSortedPlaylists.clear(); mSortedAlbums.clear(); } /** * {@inheritDoc} */ @Override public int getGroupCount() { if (mSearchResults.size() > 0) { return COUNT; } else { return 0; } } public void setGroupMaxCount(int group, int count) { mMaxCount[group] = count; computeResultsList(); notifyDataSetChanged(); } public int getGroupMaxCount(int group) { return mMaxCount[group]; } /** * Add the results to the current adapter's results * * @param searchResults The results to append */ public void appendResults(List<SearchResult> searchResults) { mSearchResults.addAll(searchResults); for (SearchResult searchResult : searchResults) { final ProviderIdentifier id = searchResult.getIdentifier(); final List<String> songs = searchResult.getSongsList(); final List<String> artists = searchResult.getArtistList(); final List<String> playlists = searchResult.getPlaylistList(); final List<String> albums = searchResult.getAlbumsList(); for (String song : songs) { SearchEntry entry = new SearchEntry(song, id); if (!mAllSongs.contains(entry)) { mAllSongs.add(entry); } } for (String artist : artists) { SearchEntry entry = new SearchEntry(artist, id); if (!mAllArtists.contains(entry)) { mAllArtists.add(entry); } } for (String playlist : playlists) { SearchEntry entry = new SearchEntry(playlist, id); if (!mAllPlaylists.contains(entry)) { mAllPlaylists.add(entry); } } for (String album : albums) { SearchEntry entry = new SearchEntry(album, id); if (!mAllAlbums.contains(entry)) { mAllAlbums.add(entry); } } } computeResultsList(); } private void computeResultsList() { mSortedArtists.clear(); mSortedAlbums.clear(); mSortedPlaylists.clear(); mSortedSongs.clear(); Map<ProviderIdentifier, Integer> songsPerProvider = new HashMap<>(); Map<ProviderIdentifier, Integer> albumsPerProvider = new HashMap<>(); Map<ProviderIdentifier, Integer> playlistsPerProvider = new HashMap<>(); Map<ProviderIdentifier, Integer> artistsPerProvider = new HashMap<>(); for (SearchEntry song : mAllSongs) { Integer providerCountInteger = songsPerProvider.get(song.identifier); int providerCount = providerCountInteger == null ? 0 : providerCountInteger; if (providerCount < mMaxCount[SONG]) { mSortedSongs.add(song); songsPerProvider.put(song.identifier, providerCount + 1); } } for (SearchEntry album : mAllAlbums) { Integer providerCountInteger = albumsPerProvider.get(album.identifier); int providerCount = providerCountInteger == null ? 0 : providerCountInteger; if (providerCount < mMaxCount[ALBUM]) { mSortedAlbums.add(album); albumsPerProvider.put(album.identifier, providerCount + 1); } } for (SearchEntry artist : mAllArtists) { Integer providerCountInteger = artistsPerProvider.get(artist.identifier); int providerCount = providerCountInteger == null ? 0 : providerCountInteger; if (providerCount < mMaxCount[ARTIST]) { mSortedArtists.add(artist); artistsPerProvider.put(artist.identifier, providerCount + 1); } } for (SearchEntry playlist : mAllPlaylists) { Integer providerCountInteger = playlistsPerProvider.get(playlist.identifier); int providerCount = providerCountInteger == null ? 0 : providerCountInteger; if (providerCount < mMaxCount[PLAYLIST]) { mSortedPlaylists.add(playlist); playlistsPerProvider.put(playlist.identifier, providerCount + 1); } } } /** * Returns whether or not the search results contains the provided entity * * @param ent The entity to check * @return True if the search results contains the entity, false otherwise */ public boolean contains(BoundEntity ent) { SearchEntry compare = new SearchEntry(ent.getRef(), ent.getProvider()); if (ent instanceof Song) { return mAllSongs.contains(compare); } else if (ent instanceof Artist) { return mAllArtists.contains(compare); } else if (ent instanceof Album) { return mAllAlbums.contains(compare); } else if (ent instanceof Playlist) { return mAllPlaylists.contains(compare); } return false; } /** * {@inheritDoc} */ @Override public int getChildrenCount(int i) { List children = getGroup(i); if (children != null) { return children.size() + 1; } else { return 0; } } /** * {@inheritDoc} */ @Override public List<SearchEntry> getGroup(int i) { switch (i) { case ARTIST: return mSortedArtists; case ALBUM: return mSortedAlbums; case SONG: return mSortedSongs; case PLAYLIST: return mSortedPlaylists; default: return null; } } /** * {@inheritDoc} */ @Override public SearchEntry getChild(int i, int i2) { try { return getGroup(i).get(i2); } catch (IndexOutOfBoundsException e) { // TODO: Better heuristic // This is the "More" item in search return new SearchEntry(SearchFragment.KEY_SPECIAL_MORE, null); } } /** * {@inheritDoc} */ @Override public long getGroupId(int i) { return i; } /** * {@inheritDoc} */ @Override public long getChildId(int i, int i2) { if (i < getGroupCount() && i2 < getChildrenCount(i)) { try { return (long) getChild(i, i2).hashCode(); } catch (IndexOutOfBoundsException e) { // It's the 'more' item // TODO: Better heuristic for that return -2; } } else { return -1; } } /** * {@inheritDoc} */ @Override public boolean hasStableIds() { return true; } /** * {@inheritDoc} */ @Override public View getGroupView(int i, boolean b, View view, ViewGroup parent) { final Context ctx = parent.getContext(); assert ctx != null; GroupViewHolder holder; if (view == null) { LayoutInflater inflater = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE); view = inflater.inflate(R.layout.item_group_separator, parent, false); holder = new GroupViewHolder(); holder.tvSearchSeparator = (TextView) view.findViewById(R.id.tv_search_separator); view.setTag(holder); } else { holder = (GroupViewHolder) view.getTag(); } int title; switch (i) { case ARTIST: title = R.string.tab_artists; break; case ALBUM: title = R.string.albums; break; case SONG: title = R.string.songs; break; case PLAYLIST: title = R.string.tab_playlists; break; default: throw new RuntimeException("Unknown group index: " + i); } holder.tvSearchSeparator.setText(title); if (getChildrenCount(i) == 0) { view.setVisibility(View.GONE); } else { view.setVisibility(View.VISIBLE); } return view; } /** * {@inheritDoc} */ @Override public View getChildView(int i, int i2, boolean b, View root, ViewGroup parent) { final Context ctx = parent.getContext(); assert ctx != null; if (root == null) { LayoutInflater inflater = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE); root = inflater.inflate(R.layout.item_search_element, parent, false); ViewHolder holder = new ViewHolder(); holder.albumArtImageView = (AlbumArtImageView) root.findViewById(R.id.ivCover); holder.tvTitle = (TextView) root.findViewById(R.id.tvTitle); holder.tvSubtitle = (TextView) root.findViewById(R.id.tvSubTitle); holder.divider = (TextView) root.findViewById(R.id.divider); holder.ivSource = (ImageView) root.findViewById(R.id.ivSource); holder.ivOverflow = (ImageView) root.findViewById(R.id.ivOverflow); holder.vRoot = root; holder.ivOverflow.setTag(holder); root.setTag(holder); } final ViewHolder tag = (ViewHolder) root.getTag(); if (i2 == getChildrenCount(i) - 1) { tag.albumArtImageView.setVisibility(View.INVISIBLE); tag.ivSource.setVisibility(View.GONE); if (getChildrenCount(i) == 1) { tag.tvTitle.setText(R.string.search_no_results); } else { tag.tvTitle.setText(R.string.more); } tag.tvSubtitle.setText(null); tag.ivOverflow.setVisibility(View.GONE); tag.content = null; } else { tag.albumArtImageView.setVisibility(View.VISIBLE); tag.ivSource.setVisibility(View.VISIBLE); tag.ivOverflow.setVisibility(View.VISIBLE); switch (i) { case ARTIST: updateArtistTag(i2, tag); break; case ALBUM: updateAlbumTag(i2, tag); break; case SONG: updateSongTag(i2, tag); break; case PLAYLIST: updatePlaylistTag(i2, tag); break; default: Log.e(TAG, "Unknown group " + i); break; } } return root; } /** * Updates the tag fields considering the entry is a song * * @param i The item index * @param tag The tag of the view */ private void updateSongTag(int i, ViewHolder tag) { final SearchEntry entry = mSortedSongs.get(i); final ProviderAggregator aggregator = ProviderAggregator.getDefault(); Song song = aggregator.retrieveSong(entry.ref, entry.identifier); if (song != null && song.equals(tag.content)) { // We're already displaying it return; } if (song != null && song.isLoaded()) { tag.tvTitle.setText(song.getTitle()); Artist artist = aggregator.retrieveArtist(song.getArtist(), song.getProvider()); if (artist != null) { tag.tvSubtitle.setText(artist.getName()); } else { tag.tvSubtitle.setText(null); } tag.albumArtImageView.loadArtForSong(song); tag.sourceLogo = PluginsLookup.getDefault().getCachedLogo(tag.vRoot.getResources(), song); tag.ivSource.setImageDrawable(tag.sourceLogo); tag.content = song; tag.ivOverflow.setOnClickListener(mOverflowSongClickListener); } else { tag.tvTitle.setText(R.string.loading); tag.tvSubtitle.setText(null); tag.ivSource.setImageDrawable(null); tag.albumArtImageView.setDefaultArt(); tag.ivOverflow.setOnClickListener(null); } } /** * Updates the tag fields considering the entry is an artist * * @param i The item index * @param tag The tag of the view */ private void updateArtistTag(int i, ViewHolder tag) { final SearchEntry entry = mSortedArtists.get(i); final ProviderAggregator aggregator = ProviderAggregator.getDefault(); Artist artist = aggregator.retrieveArtist(entry.ref, entry.identifier); if (artist != null && artist.equals(tag.content)) { // We're already displaying it return; } if (artist != null && (artist.isLoaded() || artist.getName() != null)) { tag.tvTitle.setText(artist.getName()); tag.tvSubtitle.setText(null); tag.albumArtImageView.loadArtForArtist(artist); tag.content = artist; tag.sourceLogo = PluginsLookup.getDefault().getCachedLogo(tag.vRoot.getResources(), artist); tag.ivSource.setImageDrawable(tag.sourceLogo); tag.ivOverflow.setOnClickListener(mOverflowArtistClickListener); } else { tag.tvTitle.setText(R.string.loading); tag.tvSubtitle.setText(null); tag.ivSource.setImageDrawable(null); tag.albumArtImageView.setDefaultArt(); tag.ivOverflow.setOnClickListener(null); } } /** * Updates the tag fields considering the entry is an album * * @param i The item index * @param tag The tag of the view */ private void updateAlbumTag(int i, ViewHolder tag) { final SearchEntry entry = mSortedAlbums.get(i); ProviderAggregator aggregator = ProviderAggregator.getDefault(); Album album = aggregator.retrieveAlbum(entry.ref, entry.identifier); if (album != null && album.equals(tag.content)) { // We're already displaying it return; } if (album != null) { tag.tvTitle.setText(album.getName()); if (album.getYear() > 0) { tag.tvSubtitle.setText("" + album.getYear()); } else { tag.tvSubtitle.setText(""); } tag.albumArtImageView.loadArtForAlbum(album); tag.sourceLogo = PluginsLookup.getDefault().getCachedLogo(tag.vRoot.getResources(), album); tag.ivSource.setImageDrawable(tag.sourceLogo); tag.content = album; tag.ivOverflow.setOnClickListener(mOverflowAlbumClickListener); // Ensure album contents are fetched so that we can do something with it ProviderConnection conn = PluginsLookup.getDefault().getProvider(album.getProvider()); if (conn != null) { IMusicProvider binder = conn.getBinder(); if (binder != null) { try { binder.fetchAlbumTracks(album.getRef()); } catch (RemoteException e) { Log.e(TAG, "Cannot fetch album tracks"); } } } } else { tag.tvTitle.setText(R.string.loading); tag.tvSubtitle.setText(null); tag.albumArtImageView.setDefaultArt(); tag.ivOverflow.setOnClickListener(null); } } /** * Updates the tag fields considering the entry is a playlist * * @param i The item index * @param tag The tag of the view */ private void updatePlaylistTag(int i, ViewHolder tag) { final SearchEntry entry = mSortedPlaylists.get(i); final Playlist playlist = ProviderAggregator.getDefault().retrievePlaylist(entry.ref, entry.identifier); final Resources res = tag.vRoot.getResources(); if (playlist != null && playlist.equals(tag.content)) { // We're already displaying it return; } if (playlist != null && (playlist.isLoaded() || playlist.getName() != null)) { tag.tvTitle.setText(playlist.getName()); tag.tvSubtitle.setText(res.getQuantityString(R.plurals.xx_songs, playlist.getSongsCount())); tag.content = playlist; tag.sourceLogo = PluginsLookup.getDefault().getCachedLogo(tag.vRoot.getResources(), playlist); tag.ivSource.setImageDrawable(tag.sourceLogo); tag.ivOverflow.setOnClickListener(mOverflowPlaylistClickListener); } else { tag.tvTitle.setText(R.string.loading); tag.tvSubtitle.setText(null); tag.ivSource.setImageDrawable(null); tag.albumArtImageView.setDefaultArt(); tag.ivOverflow.setOnClickListener(null); } } /** * {@inheritDoc} */ @Override public boolean isChildSelectable(int i, int i2) { return mSearchResults.size() > 0 && getGroup(i) != null; } private void showArtistOverflow(final Context context, View parent, final Artist artist) { PopupMenu popupMenu = new PopupMenu(context, parent); popupMenu.inflate(R.menu.search_res_artist); popupMenu.show(); popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem menuItem) { switch (menuItem.getItemId()) { case R.id.menu_play_now: List<Song> radio = Suggestor.getInstance().buildArtistRadio(artist); PlaybackProxy.clearQueue(); for (Song song : radio) { PlaybackProxy.queueSong(song, false); } PlaybackProxy.playAtIndex(0); break; default: return false; } return true; } }); } private void showAlbumOverflow(final Context context, View parent, final Album album) { PopupMenu popupMenu = new PopupMenu(context, parent); popupMenu.inflate(R.menu.search_res_album); popupMenu.show(); final String artist = Utils.getMainArtist(album); if (artist == null) { // No artist could be found for this album, don't show the entry popupMenu.getMenu().removeItem(R.id.menu_open_artist_page); } popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem menuItem) { switch (menuItem.getItemId()) { case R.id.menu_play_now: PlaybackProxy.playAlbum(album); break; case R.id.menu_add_to_queue: PlaybackProxy.queueAlbum(album, false); break; case R.id.menu_open_artist_page: if (artist != null) { Intent intent = ArtistActivity.craftIntent(context, null, artist, album.getProvider(), 0xFF333333); context.startActivity(intent); } break; case R.id.menu_add_to_playlist: PlaylistChooserFragment fragment = PlaylistChooserFragment.newInstance(album); fragment.show(((FragmentActivity) context).getSupportFragmentManager(), album.getRef()); break; default: return false; } return true; } }); } private void showSongOverflow(final Context context, View parent, final Song song) { PopupMenu popupMenu = new PopupMenu(context, parent); popupMenu.inflate(R.menu.search_res_song); popupMenu.show(); if (song.getArtist() == null) { // No attached artist, don't show the menu entry popupMenu.getMenu().removeItem(R.id.menu_open_artist_page); } if (song.getAlbum() == null) { // No attached album, don't show the menu entry popupMenu.getMenu().removeItem(R.id.menu_open_album_page); } popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem menuItem) { Intent intent; switch (menuItem.getItemId()) { case R.id.menu_play_now: PlaybackProxy.playSong(song); break; case R.id.menu_add_to_queue: PlaybackProxy.queueSong(song, false); break; case R.id.menu_open_artist_page: if (song.getArtist() != null) { intent = ArtistActivity.craftIntent(context, null, song.getArtist(), song.getProvider(), 0xFF333333); context.startActivity(intent); } break; case R.id.menu_open_album_page: if (song.getAlbum() != null) { intent = AlbumActivity.craftIntent(context, null, song.getAlbum(), song.getProvider(), 0xFF333333); context.startActivity(intent); } break; case R.id.menu_add_to_playlist: PlaylistChooserFragment fragment = PlaylistChooserFragment.newInstance(song); fragment.show(((FragmentActivity) context).getSupportFragmentManager(), song.getRef()); break; default: return false; } return true; } }); } private void showPlaylistOverflow(final Context context, View parent, final Playlist playlist) { PopupMenu popupMenu = new PopupMenu(context, parent); popupMenu.inflate(R.menu.search_res_playlist); popupMenu.show(); popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem menuItem) { switch (menuItem.getItemId()) { case R.id.menu_play_now: PlaybackProxy.playPlaylist(playlist); break; case R.id.menu_add_to_queue: PlaybackProxy.queuePlaylist(playlist, false); break; case R.id.menu_add_to_playlist: PlaylistChooserFragment fragment = PlaylistChooserFragment.newInstance(playlist); fragment.show(((FragmentActivity) context).getSupportFragmentManager(), playlist.getRef()); break; default: return false; } return true; } }); } /** * ViewHolder for list items */ public static class ViewHolder { public AlbumArtImageView albumArtImageView; public TextView tvTitle; public TextView tvSubtitle; public Object content; public TextView divider; public ImageView ivSource; public View vRoot; public RecyclingBitmapDrawable sourceLogo; public ImageView ivOverflow; } /** * ViewHolder for group headers */ private static class GroupViewHolder { public TextView tvSearchSeparator; } }