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Diffstat (limited to 'src/com/android/tv/MediaSessionWrapper.java')
| -rw-r--r-- | src/com/android/tv/MediaSessionWrapper.java | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/src/com/android/tv/MediaSessionWrapper.java b/src/com/android/tv/MediaSessionWrapper.java new file mode 100644 index 00000000..da6ad2a4 --- /dev/null +++ b/src/com/android/tv/MediaSessionWrapper.java @@ -0,0 +1,216 @@ +/* + * 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.tv; + +import android.content.Context; +import android.content.Intent; +import android.graphics.Bitmap; +import android.graphics.BitmapFactory; +import android.media.MediaMetadata; +import android.media.session.MediaSession; +import android.media.session.PlaybackState; +import android.media.tv.TvContract; +import android.media.tv.TvInputInfo; +import android.os.AsyncTask; +import android.support.annotation.NonNull; +import android.support.annotation.Nullable; +import android.text.TextUtils; + +import com.android.tv.data.Channel; +import com.android.tv.data.Program; +import com.android.tv.util.ImageLoader; +import com.android.tv.util.Utils; + +/** + * A wrapper class for {@link MediaSession} to support common operations on media sessions for + * {@link MainActivity}. + */ +class MediaSessionWrapper { + private static final String MEDIA_SESSION_TAG = "com.android.tv.mediasession"; + private static PlaybackState MEDIA_SESSION_STATE_PLAYING = new PlaybackState.Builder() + .setState(PlaybackState.STATE_PLAYING, PlaybackState.PLAYBACK_POSITION_UNKNOWN, 1.0f) + .build(); + private static PlaybackState MEDIA_SESSION_STATE_STOPPED = new PlaybackState.Builder() + .setState(PlaybackState.STATE_STOPPED, PlaybackState.PLAYBACK_POSITION_UNKNOWN, 0.0f) + .build(); + + private final Context mContext; + private final MediaSession mMediaSession; + private int mNowPlayingCardWidth; + private int mNowPlayingCardHeight; + + MediaSessionWrapper(Context context) { + mContext = context; + mMediaSession = new MediaSession(context, MEDIA_SESSION_TAG); + mMediaSession.setCallback(new MediaSession.Callback() { + @Override + public boolean onMediaButtonEvent(@NonNull Intent mediaButtonIntent) { + // Consume the media button event here. Should not send it to other apps. + return true; + } + }); + mMediaSession.setFlags(MediaSession.FLAG_HANDLES_MEDIA_BUTTONS | + MediaSession.FLAG_HANDLES_TRANSPORT_CONTROLS); + mNowPlayingCardWidth = mContext.getResources().getDimensionPixelSize( + R.dimen.notif_card_img_max_width); + mNowPlayingCardHeight = mContext.getResources().getDimensionPixelSize( + R.dimen.notif_card_img_height); + } + + /** + * Sets playback state. + * + * @param isPlaying {@code true} if TV is playing, otherwise {@code false}. + */ + void setPlaybackState(boolean isPlaying) { + if (isPlaying) { + mMediaSession.setActive(true); + // setPlaybackState() has to be called after calling setActive(). b/31933276 + mMediaSession.setPlaybackState(MEDIA_SESSION_STATE_PLAYING); + } else if (mMediaSession.isActive()) { + mMediaSession.setPlaybackState(MEDIA_SESSION_STATE_STOPPED); + mMediaSession.setActive(false); + } + } + + /** + * Updates media session according to the current TV playback status. + * + * @param blocked {@code true} if the current channel is blocked, either by user settings or + * the current program's content ratings. + * @param currentChannel The currently playing channel. + * @param currentProgram The currently playing program. + */ + void update(boolean blocked, Channel currentChannel, Program currentProgram) { + if (currentChannel == null) { + setPlaybackState(false); + return; + } + + // If the channel is blocked, display a lock and a short text on the Now Playing Card + if (blocked) { + Bitmap art = BitmapFactory.decodeResource(mContext.getResources(), + R.drawable.ic_message_lock_preview); + updateMediaMetadata(mContext.getResources() + .getString(R.string.channel_banner_locked_channel_title), art); + setPlaybackState(true); + return; + } + + String cardTitleText = null; + String posterArtUri = null; + if (currentProgram != null) { + cardTitleText = currentProgram.getTitle(); + posterArtUri = currentProgram.getPosterArtUri(); + } + if (TextUtils.isEmpty(cardTitleText)) { + cardTitleText = getChannelName(currentChannel); + } + updateMediaMetadata(cardTitleText, null); + if (posterArtUri == null) { + posterArtUri = TvContract.buildChannelLogoUri(currentChannel.getId()).toString(); + } + updatePosterArt(currentChannel, currentProgram, cardTitleText, null, posterArtUri); + setPlaybackState(true); + } + + /** + * Releases the media session. + * + * @see MediaSession#release() + */ + void release() { + mMediaSession.release(); + } + + private String getChannelName(Channel channel) { + if (channel.isPassthrough()) { + TvInputInfo input = TvApplication.getSingletons(mContext).getTvInputManagerHelper() + .getTvInputInfo(channel.getInputId()); + return Utils.loadLabel(mContext, input); + } else { + return channel.getDisplayName(); + } + } + + private void updatePosterArt(Channel currentChannel, Program currentProgram, + String cardTitleText, @Nullable Bitmap posterArt, @Nullable String posterArtUri) { + if (posterArt != null) { + updateMediaMetadata(cardTitleText, posterArt); + } else if (posterArtUri != null) { + ImageLoader.loadBitmap(mContext, posterArtUri, mNowPlayingCardWidth, + mNowPlayingCardHeight, new ProgramPosterArtCallback(this, currentChannel, + currentProgram, cardTitleText)); + } else { + updateMediaMetadata(cardTitleText, R.drawable.default_now_card); + } + } + + private void updateMediaMetadata(final String title, final Bitmap posterArt) { + new AsyncTask<Void, Void, Void>() { + @Override + protected Void doInBackground(Void... arg0) { + MediaMetadata.Builder builder = new MediaMetadata.Builder(); + builder.putString(MediaMetadata.METADATA_KEY_TITLE, title); + if (posterArt != null) { + builder.putBitmap(MediaMetadata.METADATA_KEY_ART, posterArt); + } + mMediaSession.setMetadata(builder.build()); + return null; + } + }.execute(); + } + + private void updateMediaMetadata(final String title, final int imageResId) { + new AsyncTask<Void, Void, Void> () { + @Override + protected Void doInBackground(Void... arg0) { + MediaMetadata.Builder builder = new MediaMetadata.Builder(); + builder.putString(MediaMetadata.METADATA_KEY_TITLE, title); + Bitmap posterArt = + BitmapFactory.decodeResource(mContext.getResources(), imageResId); + if (posterArt != null) { + builder.putBitmap(MediaMetadata.METADATA_KEY_ART, posterArt); + } + mMediaSession.setMetadata(builder.build()); + return null; + } + }.execute(); + } + + private static class ProgramPosterArtCallback extends + ImageLoader.ImageLoaderCallback<MediaSessionWrapper> { + private final Channel mChannel; + private final Program mProgram; + private final String mCardTitleText; + + ProgramPosterArtCallback(MediaSessionWrapper sessionWrapper, Channel channel, + Program program, String cardTitleText) { + super(sessionWrapper); + mChannel = channel; + mProgram = program; + mCardTitleText = cardTitleText; + } + + @Override + public void onBitmapLoaded(MediaSessionWrapper sessionWrapper, @Nullable Bitmap posterArt) { + if (((MainActivity) sessionWrapper.mContext).isNowPlayingProgram(mChannel, mProgram)) { + sessionWrapper.updatePosterArt(mChannel, mProgram, mCardTitleText, posterArt, null); + } + } + } +} |