Java tutorial
/* * Copyright (C) 2015 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.tv; import android.content.Context; import android.content.pm.PackageManager; import android.graphics.drawable.Drawable; import android.os.Handler; import android.os.Looper; import android.support.v17.leanback.widget.ImageCardView; import android.support.v17.leanback.widget.Presenter; import android.support.v4.graphics.ColorUtils; import android.support.v7.graphics.Palette; import android.text.TextUtils; import android.view.ViewGroup; import android.widget.ImageView; import com.fastbootmobile.encore.app.R; import com.fastbootmobile.encore.art.AlbumArtHelper; import com.fastbootmobile.encore.art.AlbumArtTask; import com.fastbootmobile.encore.art.RecyclingBitmapDrawable; 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.Song; import com.fastbootmobile.encore.providers.DSPConnection; import com.fastbootmobile.encore.providers.ProviderAggregator; import com.fastbootmobile.encore.providers.ProviderConnection; import com.fastbootmobile.encore.utils.Utils; public class CardPresenter extends Presenter { private static final String TAG = "CardPresenter"; private static final int CARD_WIDTH = 212; private static final int CARD_HEIGHT = 176; private static int sSelectedBackgroundColor; private static int sDefaultBackgroundColor; private Context mContext; private Drawable mDefaultCardImage; private AlbumArtTask mArtTask; private Handler mHandler; public CardPresenter() { mHandler = new Handler(Looper.getMainLooper()); } @Override public ViewHolder onCreateViewHolder(ViewGroup parent) { sDefaultBackgroundColor = parent.getResources().getColor(R.color.primary_dark); sSelectedBackgroundColor = parent.getResources().getColor(R.color.primary); mContext = parent.getContext(); mDefaultCardImage = mContext.getResources().getDrawable(R.drawable.album_placeholder); ImageCardView cardView = new ImageCardView(mContext) { @Override public void setSelected(boolean selected) { updateCardBackgroundColor(this, selected); super.setSelected(selected); } }; cardView.setFocusable(true); cardView.setFocusableInTouchMode(true); updateCardBackgroundColor(cardView, false); return new ViewHolder(cardView); } private static void updateCardBackgroundColor(ImageCardView view, boolean selected) { int color = selected ? sSelectedBackgroundColor : sDefaultBackgroundColor; if (view.getTag() != null && view.getTag() instanceof Palette) { Palette palette = (Palette) view.getTag(); final int darkVibColor = palette.getDarkVibrantColor(sSelectedBackgroundColor); final int darkVibColorDim = ColorUtils.compositeColors(0xA0FFFFFF & darkVibColor, 0xFF000000); color = selected ? darkVibColor : darkVibColorDim; } // Both background colors should be set because the view's background is temporarily visible // during animations. view.setBackgroundColor(color); view.findViewById(R.id.info_field).setBackgroundColor(color); } @Override public void onBindViewHolder(Presenter.ViewHolder viewHolder, Object item) { final ImageCardView cardView = (ImageCardView) viewHolder.view; final Context ctx = viewHolder.view.getContext(); if (item instanceof Artist) { Artist artist = (Artist) item; cardView.setTitleText(artist.getName()); cardView.setContentText(mContext.getString(R.string.artist)); } else if (item instanceof Album) { Album album = (Album) item; cardView.setTitleText(album.getName()); cardView.setContentText(mContext.getString(R.string.album)); String artistRef = Utils.getMainArtist(album); if (artistRef != null) { Artist artist = ProviderAggregator.getDefault().retrieveArtist(artistRef, album.getProvider()); if (artist != null && artist.getName() != null && !TextUtils.isEmpty(artist.getName())) { cardView.setContentText(artist.getName()); } } } else if (item instanceof Song) { Song song = (Song) item; cardView.setTitleText(song.getTitle()); String artistRef = song.getArtist(); if (artistRef != null) { Artist artist = ProviderAggregator.getDefault().retrieveArtist(artistRef, song.getProvider()); if (artist != null && artist.getName() != null && !TextUtils.isEmpty(artist.getName())) { cardView.setContentText(artist.getName()); } } } else if (item instanceof Playlist) { Playlist playlist = (Playlist) item; cardView.setTitleText(playlist.getName()); cardView.setContentText(ctx.getResources().getQuantityString(R.plurals.nb_tracks, playlist.getSongsCount(), playlist.getSongsCount())); } else if (item instanceof MyLibraryItem) { MyLibraryItem libraryItem = (MyLibraryItem) item; switch (libraryItem.getType()) { case MyLibraryItem.TYPE_ALBUMS: cardView.setTitleText(ctx.getString(R.string.tab_albums)); break; case MyLibraryItem.TYPE_ARTISTS: cardView.setTitleText(ctx.getString(R.string.tab_artists)); break; } cardView.setMainImage(ctx.getResources().getDrawable(R.drawable.album_placeholder)); updateCardBackgroundColor(cardView, cardView.isSelected()); } else if (item instanceof ProviderConnection) { ProviderConnection connection = (ProviderConnection) item; try { Drawable icon = ctx.getPackageManager().getApplicationIcon(connection.getPackage()); cardView.setMainImage(icon); } catch (PackageManager.NameNotFoundException e) { // set default icon cardView.setMainImage(ctx.getResources().getDrawable(R.mipmap.ic_launcher)); } cardView.setTitleText(connection.getProviderName()); cardView.setContentText(connection.getAuthorName()); cardView.setMainImageScaleType(ImageView.ScaleType.CENTER_INSIDE); cardView.getMainImageView().setBackgroundColor(0xFFFFFFFF); } else if (item instanceof DSPConnection) { DSPConnection connection = (DSPConnection) item; try { Drawable icon = ctx.getPackageManager().getApplicationIcon(connection.getPackage()); cardView.setMainImage(icon); } catch (PackageManager.NameNotFoundException e) { // set default icon cardView.setMainImage(ctx.getResources().getDrawable(R.mipmap.ic_launcher)); } cardView.setTitleText(connection.getProviderName()); cardView.setContentText(connection.getAuthorName()); cardView.setMainImageScaleType(ImageView.ScaleType.CENTER_INSIDE); cardView.getMainImageView().setBackgroundColor(0xFFFFFFFF); } cardView.setMainImageDimensions(CARD_WIDTH, CARD_HEIGHT); cardView.setMainImage(mDefaultCardImage); if (item instanceof BoundEntity) { mArtTask = AlbumArtHelper.retrieveAlbumArt(mContext.getResources(), new AlbumArtHelper.AlbumArtListener() { @Override public void onArtLoaded(final RecyclingBitmapDrawable output, BoundEntity request) { if (output != null) { mHandler.post(new Runnable() { public void run() { Palette palette = Palette.from(output.getBitmap()).generate(); cardView.setMainImage(output, true); cardView.setTag(palette); updateCardBackgroundColor(cardView, cardView.isSelected()); } }); } } }, (BoundEntity) item, CARD_WIDTH, false); } } @Override public void onUnbindViewHolder(Presenter.ViewHolder viewHolder) { ImageCardView cardView = (ImageCardView) viewHolder.view; // Remove references to images so that the garbage collector can free up memory cardView.setBadgeImage(null); cardView.setMainImage(null); cardView.setTag(null); updateCardBackgroundColor(cardView, false); } }