| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.car.media.drawer; |
| |
| import android.content.Context; |
| import android.graphics.PorterDuff; |
| import android.graphics.drawable.Drawable; |
| import android.media.MediaDescription; |
| import android.media.browse.MediaBrowser; |
| import android.media.session.MediaSession; |
| import android.support.annotation.Nullable; |
| import android.util.Log; |
| import com.android.car.app.DrawerItemViewHolder; |
| import com.android.car.media.MediaPlaybackModel; |
| import com.android.car.media.R; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * {@link MediaItemsFetcher} implementation that fetches items from a specific {@link MediaBrowser} |
| * node. |
| * <p> |
| * It optionally supports surfacing the Media app's queue as the last item. |
| */ |
| class MediaBrowserItemsFetcher implements MediaItemsFetcher { |
| private static final String TAG = "Media.BrowserFetcher"; |
| |
| /** |
| * An id that can be returned from {@link MediaBrowser.MediaItem#getMediaId()} to indicate that |
| * a {@link android.media.browse.MediaBrowser.MediaItem} representing the play queue has been |
| * clicked. |
| */ |
| static final String PLAY_QUEUE_MEDIA_ID = "com.android.car.media.drawer.PLAY_QUEUE"; |
| |
| private final Context mContext; |
| private final MediaPlaybackModel mMediaPlaybackModel; |
| private final String mMediaId; |
| private final boolean mShowQueueItem; |
| private final MediaItemOnClickListener mItemClickListener; |
| private ItemsUpdatedCallback mCallback; |
| private List<MediaBrowser.MediaItem> mItems = new ArrayList<>(); |
| private boolean mQueueAvailable; |
| |
| MediaBrowserItemsFetcher(Context context, MediaPlaybackModel model, |
| MediaItemOnClickListener listener, String mediaId, boolean showQueueItem) { |
| mContext = context; |
| mMediaPlaybackModel = model; |
| mItemClickListener = listener; |
| mMediaId = mediaId; |
| mShowQueueItem = showQueueItem; |
| } |
| |
| @Override |
| public void start(ItemsUpdatedCallback callback) { |
| mCallback = callback; |
| updateQueueAvailability(); |
| mMediaPlaybackModel.getMediaBrowser().subscribe(mMediaId, mSubscriptionCallback); |
| mMediaPlaybackModel.addListener(mModelListener); |
| } |
| |
| private final MediaPlaybackModel.Listener mModelListener = |
| new MediaPlaybackModel.AbstractListener() { |
| @Override |
| public void onQueueChanged(List<MediaSession.QueueItem> queue) { |
| updateQueueAvailability(); |
| } |
| @Override |
| public void onSessionDestroyed(CharSequence destroyedMediaClientName) { |
| updateQueueAvailability(); |
| } |
| }; |
| |
| private final MediaBrowser.SubscriptionCallback mSubscriptionCallback = |
| new MediaBrowser.SubscriptionCallback() { |
| @Override |
| public void onChildrenLoaded(String parentId, List<MediaBrowser.MediaItem> children) { |
| mItems.clear(); |
| mItems.addAll(children); |
| mCallback.onItemsUpdated(); |
| } |
| |
| @Override |
| public void onError(String parentId) { |
| Log.e(TAG, "Error loading children of: " + mMediaId); |
| mItems.clear(); |
| mCallback.onItemsUpdated(); |
| } |
| }; |
| |
| private void updateQueueAvailability() { |
| if (mShowQueueItem && !mMediaPlaybackModel.getQueue().isEmpty()) { |
| mQueueAvailable = true; |
| } |
| } |
| |
| @Override |
| public int getItemCount() { |
| int size = mItems.size(); |
| if (mQueueAvailable) { |
| size++; |
| } |
| return size; |
| } |
| |
| @Override |
| public boolean usesSmallLayout(int position) { |
| if (mQueueAvailable && position == mItems.size()) { |
| return true; |
| } |
| return MediaItemsFetcher.usesSmallLayout(mItems.get(position).getDescription()); |
| } |
| |
| @Override |
| public void populateViewHolder(DrawerItemViewHolder holder, int position) { |
| if (mQueueAvailable && position == mItems.size()) { |
| holder.getTitle().setText(mMediaPlaybackModel.getQueueTitle()); |
| return; |
| } |
| MediaBrowser.MediaItem item = mItems.get(position); |
| MediaItemsFetcher.populateViewHolderFrom(holder, item.getDescription()); |
| |
| if (holder.getRightIcon() == null) { |
| return; |
| } |
| |
| if (item.isBrowsable()) { |
| int iconColor = mContext.getColor(R.color.car_tint); |
| Drawable drawable = mContext.getDrawable(R.drawable.ic_chevron_right); |
| drawable.setColorFilter(iconColor, PorterDuff.Mode.SRC_IN); |
| holder.getRightIcon().setImageDrawable(drawable); |
| } else { |
| holder.getRightIcon().setImageDrawable(null); |
| } |
| } |
| |
| @Override |
| public void onItemClick(int position) { |
| if (mItemClickListener == null) { |
| return; |
| } |
| |
| MediaBrowser.MediaItem item = mQueueAvailable && position == mItems.size() |
| ? createPlayQueueMediaItem() |
| : mItems.get(position); |
| |
| mItemClickListener.onMediaItemClicked(item); |
| } |
| |
| /** |
| * Creates and returns a {@link android.media.browse.MediaBrowser.MediaItem} that represents an |
| * entry for the play queue. A play queue media item will have a media id of |
| * {@link #PLAY_QUEUE_MEDIA_ID} and is {@link MediaBrowser.MediaItem#FLAG_BROWSABLE}. |
| */ |
| private MediaBrowser.MediaItem createPlayQueueMediaItem() { |
| MediaDescription description = new MediaDescription.Builder() |
| .setMediaId(PLAY_QUEUE_MEDIA_ID) |
| .setTitle(mMediaPlaybackModel.getQueueTitle()) |
| .build(); |
| |
| return new MediaBrowser.MediaItem(description, MediaBrowser.MediaItem.FLAG_BROWSABLE); |
| } |
| |
| @Override |
| public void cleanup() { |
| mMediaPlaybackModel.removeListener(mModelListener); |
| mMediaPlaybackModel.getMediaBrowser().unsubscribe(mMediaId); |
| mCallback = null; |
| } |
| |
| @Override |
| public int getScrollPosition() { |
| return MediaItemsFetcher.DONT_SCROLL; |
| } |
| } |