| /* |
| * Copyright 2019 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 android.media.session; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.app.Activity; |
| import android.app.PendingIntent; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.media.AudioAttributes; |
| import android.media.MediaDescription; |
| import android.media.MediaMetadata; |
| import android.media.Rating; |
| import android.media.VolumeProvider; |
| import android.media.session.MediaSessionManager.RemoteUserInfo; |
| import android.net.Uri; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.Parcel; |
| import android.os.ResultReceiver; |
| import android.service.media.MediaBrowserService; |
| import android.text.TextUtils; |
| import android.util.Log; |
| import android.util.Pair; |
| import android.view.KeyEvent; |
| import android.view.ViewConfiguration; |
| |
| import java.util.List; |
| import java.util.Objects; |
| |
| /** |
| * @hide |
| */ |
| public final class MediaSessionEngine implements AutoCloseable { |
| private static final String TAG = "MediaSession"; |
| |
| private final Object mLock = new Object(); |
| |
| private final MediaSession.Token mSessionToken; |
| private final MediaController mController; |
| private final SessionLink mSessionLink; |
| |
| private CallbackMessageHandler mCallbackHandler; |
| private VolumeProvider mVolumeProvider; |
| private PlaybackState mPlaybackState; |
| |
| private boolean mActive = false; |
| |
| /** |
| * Creates a new session. The session will automatically be registered with |
| * the system but will not be published until {@link #setActive(boolean) |
| * setActive(true)} is called. You must call {@link #close()} when |
| * finished with the session. |
| * |
| * @param context The context to use to create the session. |
| * @param sessionLink A session link for the binder of MediaSessionRecord |
| */ |
| public MediaSessionEngine(@NonNull Context context, @NonNull SessionLink sessionLink, |
| @NonNull SessionCallbackLink cbLink) { |
| mSessionLink = sessionLink; |
| |
| cbLink.setSessionEngine(this); |
| mSessionToken = new MediaSession.Token(mSessionLink.getController()); |
| mController = new MediaController(context, mSessionToken); |
| } |
| |
| /** |
| * Set the callback to receive updates for the MediaSession. This includes |
| * media button events and transport controls. The caller's thread will be |
| * used to post updates. |
| * <p> |
| * Set the callback to null to stop receiving updates. |
| * |
| * @param callback The callback object |
| */ |
| public void setCallback(@Nullable MediaSession.Callback callback) { |
| setCallback(callback, new Handler()); |
| } |
| |
| /** |
| * Set the callback to receive updates for the MediaSession. This includes |
| * media button events and transport controls. |
| * <p> |
| * Set the callback to null to stop receiving updates. |
| * |
| * @param callback The callback to receive updates on. |
| * @param handler The handler that events should be posted on. |
| */ |
| public void setCallback(@Nullable MediaSession.Callback callback, @NonNull Handler handler) { |
| setCallbackInternal(callback == null ? null : new CallbackWrapper(callback), handler); |
| } |
| |
| private void setCallbackInternal(CallbackWrapper callback, Handler handler) { |
| synchronized (mLock) { |
| if (mCallbackHandler != null) { |
| // We're updating the callback, clear the session from the old one. |
| mCallbackHandler.mCallbackWrapper.mSessionImpl = null; |
| mCallbackHandler.removeCallbacksAndMessages(null); |
| } |
| if (callback == null) { |
| mCallbackHandler = null; |
| return; |
| } |
| callback.mSessionImpl = this; |
| CallbackMessageHandler msgHandler = new CallbackMessageHandler(handler.getLooper(), |
| callback); |
| mCallbackHandler = msgHandler; |
| } |
| } |
| |
| /** |
| * Set an intent for launching UI for this Session. This can be used as a |
| * quick link to an ongoing media screen. The intent should be for an |
| * activity that may be started using {@link Activity#startActivity(Intent)}. |
| * |
| * @param pi The intent to launch to show UI for this Session. |
| */ |
| public void setSessionActivity(@Nullable PendingIntent pi) { |
| try { |
| mSessionLink.setLaunchPendingIntent(pi); |
| } catch (RuntimeException e) { |
| Log.wtf(TAG, "Failure in setLaunchPendingIntent.", e); |
| } |
| } |
| |
| /** |
| * Set a pending intent for your media button receiver to allow restarting |
| * playback after the session has been stopped. If your app is started in |
| * this way an {@link Intent#ACTION_MEDIA_BUTTON} intent will be sent via |
| * the pending intent. |
| * |
| * @param mbr The {@link PendingIntent} to send the media button event to. |
| */ |
| public void setMediaButtonReceiver(@Nullable PendingIntent mbr) { |
| try { |
| mSessionLink.setMediaButtonReceiver(mbr); |
| } catch (RuntimeException e) { |
| Log.wtf(TAG, "Failure in setMediaButtonReceiver.", e); |
| } |
| } |
| |
| /** |
| * Set any flags for the session. |
| * |
| * @param flags The flags to set for this session. |
| */ |
| public void setFlags(int flags) { |
| try { |
| mSessionLink.setFlags(flags); |
| } catch (RuntimeException e) { |
| Log.wtf(TAG, "Failure in setFlags.", e); |
| } |
| } |
| |
| /** |
| * Set the attributes for this session's audio. This will affect the |
| * system's volume handling for this session. If |
| * {@link #setPlaybackToRemote} was previously called it will stop receiving |
| * volume commands and the system will begin sending volume changes to the |
| * appropriate stream. |
| * <p> |
| * By default sessions use attributes for media. |
| * |
| * @param attributes The {@link AudioAttributes} for this session's audio. |
| */ |
| public void setPlaybackToLocal(AudioAttributes attributes) { |
| if (attributes == null) { |
| throw new IllegalArgumentException("Attributes cannot be null for local playback."); |
| } |
| try { |
| mSessionLink.setPlaybackToLocal(attributes); |
| } catch (RuntimeException e) { |
| Log.wtf(TAG, "Failure in setPlaybackToLocal.", e); |
| } |
| } |
| |
| /** |
| * Configure this session to use remote volume handling. This must be called |
| * to receive volume button events, otherwise the system will adjust the |
| * appropriate stream volume for this session. If |
| * {@link #setPlaybackToLocal} was previously called the system will stop |
| * handling volume changes for this session and pass them to the volume |
| * provider instead. |
| * |
| * @param volumeProvider The provider that will handle volume changes. May |
| * not be null. |
| */ |
| public void setPlaybackToRemote(@NonNull VolumeProvider volumeProvider) { |
| if (volumeProvider == null) { |
| throw new IllegalArgumentException("volumeProvider may not be null!"); |
| } |
| synchronized (mLock) { |
| mVolumeProvider = volumeProvider; |
| } |
| volumeProvider.setCallback(new VolumeProvider.Callback() { |
| @Override |
| public void onVolumeChanged(VolumeProvider volumeProvider) { |
| notifyRemoteVolumeChanged(volumeProvider); |
| } |
| }); |
| |
| try { |
| mSessionLink.setPlaybackToRemote(volumeProvider.getVolumeControl(), |
| volumeProvider.getMaxVolume()); |
| mSessionLink.setCurrentVolume(volumeProvider.getCurrentVolume()); |
| } catch (RuntimeException e) { |
| Log.wtf(TAG, "Failure in setPlaybackToRemote.", e); |
| } |
| } |
| |
| /** |
| * Set if this session is currently active and ready to receive commands. If |
| * set to false your session's controller may not be discoverable. You must |
| * set the session to active before it can start receiving media button |
| * events or transport commands. |
| * |
| * @param active Whether this session is active or not. |
| */ |
| public void setActive(boolean active) { |
| if (mActive == active) { |
| return; |
| } |
| try { |
| mSessionLink.setActive(active); |
| mActive = active; |
| } catch (RuntimeException e) { |
| Log.wtf(TAG, "Failure in setActive.", e); |
| } |
| } |
| |
| /** |
| * Get the current active state of this session. |
| * |
| * @return True if the session is active, false otherwise. |
| */ |
| public boolean isActive() { |
| return mActive; |
| } |
| |
| /** |
| * Send a proprietary event to all MediaControllers listening to this |
| * Session. It's up to the Controller/Session owner to determine the meaning |
| * of any events. |
| * |
| * @param event The name of the event to send |
| * @param extras Any extras included with the event |
| */ |
| public void sendSessionEvent(@NonNull String event, @Nullable Bundle extras) { |
| if (TextUtils.isEmpty(event)) { |
| throw new IllegalArgumentException("event cannot be null or empty"); |
| } |
| try { |
| mSessionLink.sendEvent(event, extras); |
| } catch (RuntimeException e) { |
| Log.wtf(TAG, "Error sending event", e); |
| } |
| } |
| |
| /** |
| * This must be called when an app has finished performing playback. If |
| * playback is expected to start again shortly the session can be left open, |
| * but it must be released if your activity or service is being destroyed. |
| */ |
| public void close() { |
| try { |
| mSessionLink.destroySession(); |
| } catch (RuntimeException e) { |
| Log.wtf(TAG, "Error releasing session: ", e); |
| } |
| } |
| |
| /** |
| * Retrieve a token object that can be used by apps to create a |
| * {@link MediaController} for interacting with this session. The owner of |
| * the session is responsible for deciding how to distribute these tokens. |
| * |
| * @return A token that can be used to create a MediaController for this |
| * session |
| */ |
| public @NonNull MediaSession.Token getSessionToken() { |
| return mSessionToken; |
| } |
| |
| /** |
| * Get a controller for this session. This is a convenience method to avoid |
| * having to cache your own controller in process. |
| * |
| * @return A controller for this session. |
| */ |
| public @NonNull MediaController getController() { |
| return mController; |
| } |
| |
| /** |
| * Update the current playback state. |
| * |
| * @param state The current state of playback |
| */ |
| public void setPlaybackState(@Nullable PlaybackState state) { |
| mPlaybackState = state; |
| try { |
| mSessionLink.setPlaybackState(state); |
| } catch (RuntimeException e) { |
| Log.wtf(TAG, "Dead object in setPlaybackState.", e); |
| } |
| } |
| |
| /** |
| * Update the current metadata. New metadata can be created using |
| * {@link android.media.MediaMetadata.Builder}. This operation may take time proportional to |
| * the size of the bitmap to replace large bitmaps with a scaled down copy. |
| * |
| * @param metadata The new metadata |
| * @see android.media.MediaMetadata.Builder#putBitmap |
| */ |
| public void setMetadata(@Nullable MediaMetadata metadata) { |
| long duration = -1; |
| int fields = 0; |
| MediaDescription description = null; |
| if (metadata != null) { |
| if (metadata.containsKey(MediaMetadata.METADATA_KEY_DURATION)) { |
| duration = metadata.getLong(MediaMetadata.METADATA_KEY_DURATION); |
| } |
| fields = metadata.size(); |
| description = metadata.getDescription(); |
| } |
| String metadataDescription = "size=" + fields + ", description=" + description; |
| |
| try { |
| mSessionLink.setMetadata(metadata, duration, metadataDescription); |
| } catch (RuntimeException e) { |
| Log.wtf(TAG, "Dead object in setPlaybackState.", e); |
| } |
| } |
| |
| /** |
| * Update the list of items in the play queue. It is an ordered list and |
| * should contain the current item, and previous or upcoming items if they |
| * exist. Specify null if there is no current play queue. |
| * <p> |
| * The queue should be of reasonable size. If the play queue is unbounded |
| * within your app, it is better to send a reasonable amount in a sliding |
| * window instead. |
| * |
| * @param queue A list of items in the play queue. |
| */ |
| public void setQueue(@Nullable List<MediaSession.QueueItem> queue) { |
| try { |
| mSessionLink.setQueue(queue); |
| } catch (RuntimeException e) { |
| Log.wtf("Dead object in setQueue.", e); |
| } |
| } |
| |
| /** |
| * Set the title of the play queue. The UI should display this title along |
| * with the play queue itself. |
| * e.g. "Play Queue", "Now Playing", or an album name. |
| * |
| * @param title The title of the play queue. |
| */ |
| public void setQueueTitle(@Nullable CharSequence title) { |
| try { |
| mSessionLink.setQueueTitle(title); |
| } catch (RuntimeException e) { |
| Log.wtf("Dead object in setQueueTitle.", e); |
| } |
| } |
| |
| /** |
| * Set the style of rating used by this session. Apps trying to set the |
| * rating should use this style. Must be one of the following: |
| * <ul> |
| * <li>{@link Rating#RATING_NONE}</li> |
| * <li>{@link Rating#RATING_3_STARS}</li> |
| * <li>{@link Rating#RATING_4_STARS}</li> |
| * <li>{@link Rating#RATING_5_STARS}</li> |
| * <li>{@link Rating#RATING_HEART}</li> |
| * <li>{@link Rating#RATING_PERCENTAGE}</li> |
| * <li>{@link Rating#RATING_THUMB_UP_DOWN}</li> |
| * </ul> |
| */ |
| public void setRatingType(int type) { |
| try { |
| mSessionLink.setRatingType(type); |
| } catch (RuntimeException e) { |
| Log.e(TAG, "Error in setRatingType.", e); |
| } |
| } |
| |
| /** |
| * Set some extras that can be associated with the {@link MediaSession}. No assumptions should |
| * be made as to how a {@link MediaController} will handle these extras. |
| * Keys should be fully qualified (e.g. com.example.MY_EXTRA) to avoid conflicts. |
| * |
| * @param extras The extras associated with the {@link MediaSession}. |
| */ |
| public void setExtras(@Nullable Bundle extras) { |
| try { |
| mSessionLink.setExtras(extras); |
| } catch (RuntimeException e) { |
| Log.wtf("Dead object in setExtras.", e); |
| } |
| } |
| |
| /** |
| * Gets the controller information who sent the current request. |
| * <p> |
| * Note: This is only valid while in a request callback, such as |
| * {@link MediaSession.Callback#onPlay}. |
| * |
| * @throws IllegalStateException If this method is called outside of |
| * {@link MediaSession.Callback} methods. |
| * @see MediaSessionManager#isTrustedForMediaControl(RemoteUserInfo) |
| */ |
| public @NonNull RemoteUserInfo getCurrentControllerInfo() { |
| if (mCallbackHandler == null || mCallbackHandler.mCurrentControllerInfo == null) { |
| throw new IllegalStateException( |
| "This should be called inside of MediaSession.Callback methods"); |
| } |
| return mCallbackHandler.mCurrentControllerInfo; |
| } |
| |
| /** |
| * Returns the name of the package that sent the last media button, transport control, or |
| * command from controllers and the system. This is only valid while in a request callback, such |
| * as {@link MediaSession.Callback#onPlay}. |
| */ |
| public String getCallingPackage() { |
| if (mCallbackHandler != null && mCallbackHandler.mCurrentControllerInfo != null) { |
| return mCallbackHandler.mCurrentControllerInfo.getPackageName(); |
| } |
| return null; |
| } |
| |
| |
| /** |
| * Notify the system that the remote volume changed. |
| * |
| * @param provider The provider that is handling volume changes. |
| */ |
| private void notifyRemoteVolumeChanged(VolumeProvider provider) { |
| synchronized (mLock) { |
| if (provider == null || provider != mVolumeProvider) { |
| Log.w(TAG, "Received update from stale volume provider"); |
| return; |
| } |
| } |
| try { |
| mSessionLink.setCurrentVolume(provider.getCurrentVolume()); |
| } catch (RuntimeException e) { |
| Log.e(TAG, "Error in notifyVolumeChanged", e); |
| } |
| } |
| |
| void dispatchPrepare(RemoteUserInfo caller) { |
| postToCallback(caller, CallbackMessageHandler.MSG_PREPARE, null, null); |
| } |
| |
| void dispatchPrepareFromMediaId(RemoteUserInfo caller, String mediaId, Bundle extras) { |
| postToCallback(caller, CallbackMessageHandler.MSG_PREPARE_MEDIA_ID, mediaId, extras); |
| } |
| |
| void dispatchPrepareFromSearch(RemoteUserInfo caller, String query, Bundle extras) { |
| postToCallback(caller, CallbackMessageHandler.MSG_PREPARE_SEARCH, query, extras); |
| } |
| |
| void dispatchPrepareFromUri(RemoteUserInfo caller, Uri uri, Bundle extras) { |
| postToCallback(caller, CallbackMessageHandler.MSG_PREPARE_URI, uri, extras); |
| } |
| |
| void dispatchPlay(RemoteUserInfo caller) { |
| postToCallback(caller, CallbackMessageHandler.MSG_PLAY, null, null); |
| } |
| |
| void dispatchPlayFromMediaId(RemoteUserInfo caller, String mediaId, Bundle extras) { |
| postToCallback(caller, CallbackMessageHandler.MSG_PLAY_MEDIA_ID, mediaId, extras); |
| } |
| |
| void dispatchPlayFromSearch(RemoteUserInfo caller, String query, Bundle extras) { |
| postToCallback(caller, CallbackMessageHandler.MSG_PLAY_SEARCH, query, extras); |
| } |
| |
| void dispatchPlayFromUri(RemoteUserInfo caller, Uri uri, Bundle extras) { |
| postToCallback(caller, CallbackMessageHandler.MSG_PLAY_URI, uri, extras); |
| } |
| |
| void dispatchSkipToItem(RemoteUserInfo caller, long id) { |
| postToCallback(caller, CallbackMessageHandler.MSG_SKIP_TO_ITEM, id, null); |
| } |
| |
| void dispatchPause(RemoteUserInfo caller) { |
| postToCallback(caller, CallbackMessageHandler.MSG_PAUSE, null, null); |
| } |
| |
| void dispatchStop(RemoteUserInfo caller) { |
| postToCallback(caller, CallbackMessageHandler.MSG_STOP, null, null); |
| } |
| |
| void dispatchNext(RemoteUserInfo caller) { |
| postToCallback(caller, CallbackMessageHandler.MSG_NEXT, null, null); |
| } |
| |
| void dispatchPrevious(RemoteUserInfo caller) { |
| postToCallback(caller, CallbackMessageHandler.MSG_PREVIOUS, null, null); |
| } |
| |
| void dispatchFastForward(RemoteUserInfo caller) { |
| postToCallback(caller, CallbackMessageHandler.MSG_FAST_FORWARD, null, null); |
| } |
| |
| void dispatchRewind(RemoteUserInfo caller) { |
| postToCallback(caller, CallbackMessageHandler.MSG_REWIND, null, null); |
| } |
| |
| void dispatchSeekTo(RemoteUserInfo caller, long pos) { |
| postToCallback(caller, CallbackMessageHandler.MSG_SEEK_TO, pos, null); |
| } |
| |
| void dispatchRate(RemoteUserInfo caller, Rating rating) { |
| postToCallback(caller, CallbackMessageHandler.MSG_RATE, rating, null); |
| } |
| |
| void dispatchSetPlaybackSpeed(RemoteUserInfo caller, float speed) { |
| postToCallback(caller, CallbackMessageHandler.MSG_SET_PLAYBACK_SPEED, speed, null); |
| } |
| |
| void dispatchCustomAction(RemoteUserInfo caller, String action, Bundle args) { |
| postToCallback(caller, CallbackMessageHandler.MSG_CUSTOM_ACTION, action, args); |
| } |
| |
| void dispatchMediaButton(RemoteUserInfo caller, Intent mediaButtonIntent) { |
| postToCallback(caller, CallbackMessageHandler.MSG_MEDIA_BUTTON, mediaButtonIntent, null); |
| } |
| |
| void dispatchMediaButtonDelayed(RemoteUserInfo info, Intent mediaButtonIntent, |
| long delay) { |
| postToCallbackDelayed(info, CallbackMessageHandler.MSG_PLAY_PAUSE_KEY_DOUBLE_TAP_TIMEOUT, |
| mediaButtonIntent, null, delay); |
| } |
| |
| void dispatchAdjustVolume(RemoteUserInfo caller, int direction) { |
| postToCallback(caller, CallbackMessageHandler.MSG_ADJUST_VOLUME, direction, null); |
| } |
| |
| void dispatchSetVolumeTo(RemoteUserInfo caller, int volume) { |
| postToCallback(caller, CallbackMessageHandler.MSG_SET_VOLUME, volume, null); |
| } |
| |
| void dispatchCommand(RemoteUserInfo caller, String command, Bundle args, |
| ResultReceiver resultCb) { |
| Command cmd = new Command(command, args, resultCb); |
| postToCallback(caller, CallbackMessageHandler.MSG_COMMAND, cmd, null); |
| } |
| |
| private void postToCallback(RemoteUserInfo caller, int what, Object obj, Bundle data) { |
| postToCallbackDelayed(caller, what, obj, data, 0); |
| } |
| |
| private void postToCallbackDelayed(RemoteUserInfo caller, int what, Object obj, Bundle data, |
| long delay) { |
| synchronized (mLock) { |
| if (mCallbackHandler != null) { |
| mCallbackHandler.post(caller, what, obj, data, delay); |
| } |
| } |
| } |
| |
| /** |
| * Return true if this is considered an active playback state. |
| */ |
| public static boolean isActiveState(int state) { |
| switch (state) { |
| case PlaybackState.STATE_FAST_FORWARDING: |
| case PlaybackState.STATE_REWINDING: |
| case PlaybackState.STATE_SKIPPING_TO_PREVIOUS: |
| case PlaybackState.STATE_SKIPPING_TO_NEXT: |
| case PlaybackState.STATE_BUFFERING: |
| case PlaybackState.STATE_CONNECTING: |
| case PlaybackState.STATE_PLAYING: |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Interface for handling MediaButtoneEvent |
| */ |
| public interface MediaButtonEventDelegate { |
| /** |
| * Called when a media button is pressed and this session has the |
| * highest priority or a controller sends a media button event to the |
| * session. |
| * |
| * @param mediaButtonIntent an intent containing the KeyEvent as an extra |
| * @return True if the event was handled, false otherwise. |
| */ |
| boolean onMediaButtonIntent(Intent mediaButtonIntent); |
| } |
| |
| /** |
| * Receives media buttons, transport controls, and commands from controllers |
| * and the system. A callback may be set using {@link #setCallback}. |
| * @hide |
| */ |
| public static class CallbackWrapper implements MediaButtonEventDelegate { |
| |
| private final MediaSession.Callback mCallback; |
| |
| @SuppressWarnings("WeakerAccess") /* synthetic access */ |
| MediaSessionEngine mSessionImpl; |
| @SuppressWarnings("WeakerAccess") /* synthetic access */ |
| CallbackMessageHandler mHandler; |
| private boolean mMediaPlayPauseKeyPending; |
| |
| public CallbackWrapper(MediaSession.Callback callback) { |
| mCallback = callback; |
| if (mCallback != null) { |
| mCallback.onSetMediaButtonEventDelegate(this); |
| } |
| } |
| |
| /** |
| * Called when a controller has sent a command to this session. |
| * The owner of the session may handle custom commands but is not |
| * required to. |
| * |
| * @param command The command name. |
| * @param args Optional parameters for the command, may be null. |
| * @param cb A result receiver to which a result may be sent by the command, may be null. |
| */ |
| public void onCommand(@NonNull String command, @Nullable Bundle args, |
| @Nullable ResultReceiver cb) { |
| if (mCallback != null) { |
| mCallback.onCommand(command, args, cb); |
| } |
| } |
| |
| /** |
| * Called when a media button is pressed and this session has the |
| * highest priority or a controller sends a media button event to the |
| * session. The default behavior will call the relevant method if the |
| * action for it was set. |
| * <p> |
| * The intent will be of type {@link Intent#ACTION_MEDIA_BUTTON} with a |
| * KeyEvent in {@link Intent#EXTRA_KEY_EVENT} |
| * |
| * @param mediaButtonIntent an intent containing the KeyEvent as an |
| * extra |
| * @return True if the event was handled, false otherwise. |
| */ |
| public boolean onMediaButtonEvent(@NonNull Intent mediaButtonIntent) { |
| return mCallback == null ? false : mCallback.onMediaButtonEvent(mediaButtonIntent); |
| } |
| |
| private void handleMediaPlayPauseKeySingleTapIfPending() { |
| if (!mMediaPlayPauseKeyPending) { |
| return; |
| } |
| mMediaPlayPauseKeyPending = false; |
| mHandler.removeMessages(CallbackMessageHandler.MSG_PLAY_PAUSE_KEY_DOUBLE_TAP_TIMEOUT); |
| PlaybackState state = mSessionImpl.mPlaybackState; |
| long validActions = state == null ? 0 : state.getActions(); |
| boolean isPlaying = state != null |
| && state.getState() == PlaybackState.STATE_PLAYING; |
| boolean canPlay = (validActions & (PlaybackState.ACTION_PLAY_PAUSE |
| | PlaybackState.ACTION_PLAY)) != 0; |
| boolean canPause = (validActions & (PlaybackState.ACTION_PLAY_PAUSE |
| | PlaybackState.ACTION_PAUSE)) != 0; |
| if (isPlaying && canPause) { |
| onPause(); |
| } else if (!isPlaying && canPlay) { |
| onPlay(); |
| } |
| } |
| |
| /** |
| * Override to handle requests to prepare playback. During the preparation, a session should |
| * not hold audio focus in order to allow other sessions play seamlessly. The state of |
| * playback should be updated to {@link PlaybackState#STATE_PAUSED} after the preparation is |
| * done. |
| */ |
| public void onPrepare() { |
| if (mCallback != null) { |
| mCallback.onPrepare(); |
| } |
| } |
| |
| /** |
| * Override to handle requests to prepare for playing a specific mediaId that was provided |
| * by your app's {@link MediaBrowserService}. During the preparation, a session should not |
| * hold audio focus in order to allow other sessions play seamlessly. The state of playback |
| * should be updated to {@link PlaybackState#STATE_PAUSED} after the preparation is done. |
| * The playback of the prepared content should start in the implementation of |
| * {@link #onPlay}. Override {@link #onPlayFromMediaId} to handle requests for starting |
| * playback without preparation. |
| */ |
| public void onPrepareFromMediaId(String mediaId, Bundle extras) { |
| if (mCallback != null) { |
| mCallback.onPrepareFromMediaId(mediaId, extras); |
| } |
| } |
| |
| /** |
| * Override to handle requests to prepare playback from a search query. An empty query |
| * indicates that the app may prepare any music. The implementation should attempt to make a |
| * smart choice about what to play. During the preparation, a session should not hold audio |
| * focus in order to allow other sessions play seamlessly. The state of playback should be |
| * updated to {@link PlaybackState#STATE_PAUSED} after the preparation is done. The playback |
| * of the prepared content should start in the implementation of {@link #onPlay}. Override |
| * {@link #onPlayFromSearch} to handle requests for starting playback without preparation. |
| */ |
| public void onPrepareFromSearch(String query, Bundle extras) { |
| if (mCallback != null) { |
| mCallback.onPrepareFromSearch(query, extras); |
| } |
| } |
| |
| /** |
| * Override to handle requests to prepare a specific media item represented by a URI. |
| * During the preparation, a session should not hold audio focus in order to allow |
| * other sessions play seamlessly. The state of playback should be updated to |
| * {@link PlaybackState#STATE_PAUSED} after the preparation is done. |
| * The playback of the prepared content should start in the implementation of |
| * {@link #onPlay}. Override {@link #onPlayFromUri} to handle requests |
| * for starting playback without preparation. |
| */ |
| public void onPrepareFromUri(Uri uri, Bundle extras) { |
| if (mCallback != null) { |
| mCallback.onPrepareFromUri(uri, extras); |
| } |
| } |
| |
| /** |
| * Override to handle requests to begin playback. |
| */ |
| public void onPlay() { |
| if (mCallback != null) { |
| mCallback.onPlay(); |
| } |
| } |
| |
| /** |
| * Override to handle requests to begin playback from a search query. An |
| * empty query indicates that the app may play any music. The |
| * implementation should attempt to make a smart choice about what to |
| * play. |
| */ |
| public void onPlayFromSearch(String query, Bundle extras) { |
| if (mCallback != null) { |
| mCallback.onPlayFromSearch(query, extras); |
| } |
| } |
| |
| /** |
| * Override to handle requests to play a specific mediaId that was |
| * provided by your app's {@link MediaBrowserService}. |
| */ |
| public void onPlayFromMediaId(String mediaId, Bundle extras) { |
| if (mCallback != null) { |
| mCallback.onPlayFromMediaId(mediaId, extras); |
| } |
| } |
| |
| /** |
| * Override to handle requests to play a specific media item represented by a URI. |
| */ |
| public void onPlayFromUri(Uri uri, Bundle extras) { |
| if (mCallback != null) { |
| mCallback.onPlayFromUri(uri, extras); |
| } |
| } |
| |
| /** |
| * Override to handle requests to play an item with a given id from the |
| * play queue. |
| */ |
| public void onSkipToQueueItem(long id) { |
| if (mCallback != null) { |
| mCallback.onSkipToQueueItem(id); |
| } |
| } |
| |
| /** |
| * Override to handle requests to pause playback. |
| */ |
| public void onPause() { |
| if (mCallback != null) { |
| mCallback.onPause(); |
| } |
| } |
| |
| /** |
| * Override to handle requests to skip to the next media item. |
| */ |
| public void onSkipToNext() { |
| if (mCallback != null) { |
| mCallback.onSkipToNext(); |
| } |
| } |
| |
| /** |
| * Override to handle requests to skip to the previous media item. |
| */ |
| public void onSkipToPrevious() { |
| if (mCallback != null) { |
| mCallback.onSkipToPrevious(); |
| } |
| } |
| |
| /** |
| * Override to handle requests to fast forward. |
| */ |
| public void onFastForward() { |
| if (mCallback != null) { |
| mCallback.onFastForward(); |
| } |
| } |
| |
| /** |
| * Override to handle requests to rewind. |
| */ |
| public void onRewind() { |
| if (mCallback != null) { |
| mCallback.onRewind(); |
| } |
| } |
| |
| /** |
| * Override to handle requests to stop playback. |
| */ |
| public void onStop() { |
| if (mCallback != null) { |
| mCallback.onStop(); |
| } |
| } |
| |
| /** |
| * Override to handle requests to seek to a specific position in ms. |
| * |
| * @param pos New position to move to, in milliseconds. |
| */ |
| public void onSeekTo(long pos) { |
| if (mCallback != null) { |
| mCallback.onSeekTo(pos); |
| } |
| } |
| |
| /** |
| * Override to handle the item being rated. |
| * |
| * @param rating |
| */ |
| public void onSetRating(@NonNull Rating rating) { |
| if (mCallback != null) { |
| mCallback.onSetRating(rating); |
| } |
| } |
| |
| /** |
| * Override to handle the playback speed change. |
| * |
| * @param speed the playback speed |
| */ |
| public void onSetPlaybackSpeed(float speed) { |
| if (mCallback != null) { |
| mCallback.onSetPlaybackSpeed(speed); |
| } |
| } |
| |
| /** |
| * Called when a {@link MediaController} wants a {@link PlaybackState.CustomAction} to be |
| * performed. |
| * |
| * @param action The action that was originally sent in the |
| * {@link PlaybackState.CustomAction}. |
| * @param extras Optional extras specified by the {@link MediaController}. |
| */ |
| public void onCustomAction(@NonNull String action, @Nullable Bundle extras) { |
| if (mCallback != null) { |
| mCallback.onCustomAction(action, extras); |
| } |
| } |
| |
| @Override |
| public boolean onMediaButtonIntent(Intent mediaButtonIntent) { |
| if (mSessionImpl != null && mHandler != null |
| && Intent.ACTION_MEDIA_BUTTON.equals(mediaButtonIntent.getAction())) { |
| KeyEvent ke = mediaButtonIntent.getParcelableExtra(Intent.EXTRA_KEY_EVENT); |
| if (ke != null && ke.getAction() == KeyEvent.ACTION_DOWN) { |
| PlaybackState state = mSessionImpl.mPlaybackState; |
| long validActions = state == null ? 0 : state.getActions(); |
| switch (ke.getKeyCode()) { |
| case KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE: |
| case KeyEvent.KEYCODE_HEADSETHOOK: |
| if (ke.getRepeatCount() > 0) { |
| // Consider long-press as a single tap. |
| handleMediaPlayPauseKeySingleTapIfPending(); |
| } else if (mMediaPlayPauseKeyPending) { |
| // Consider double tap as the next. |
| mHandler.removeMessages(CallbackMessageHandler |
| .MSG_PLAY_PAUSE_KEY_DOUBLE_TAP_TIMEOUT); |
| mMediaPlayPauseKeyPending = false; |
| if ((validActions & PlaybackState.ACTION_SKIP_TO_NEXT) != 0) { |
| onSkipToNext(); |
| } |
| } else { |
| mMediaPlayPauseKeyPending = true; |
| mSessionImpl.dispatchMediaButtonDelayed( |
| mSessionImpl.getCurrentControllerInfo(), |
| mediaButtonIntent, ViewConfiguration.getDoubleTapTimeout()); |
| } |
| return true; |
| default: |
| // If another key is pressed within double tap timeout, consider the |
| // pending play/pause as a single tap to handle media keys in order. |
| handleMediaPlayPauseKeySingleTapIfPending(); |
| break; |
| } |
| |
| switch (ke.getKeyCode()) { |
| case KeyEvent.KEYCODE_MEDIA_PLAY: |
| if ((validActions & PlaybackState.ACTION_PLAY) != 0) { |
| onPlay(); |
| return true; |
| } |
| break; |
| case KeyEvent.KEYCODE_MEDIA_PAUSE: |
| if ((validActions & PlaybackState.ACTION_PAUSE) != 0) { |
| onPause(); |
| return true; |
| } |
| break; |
| case KeyEvent.KEYCODE_MEDIA_NEXT: |
| if ((validActions & PlaybackState.ACTION_SKIP_TO_NEXT) != 0) { |
| onSkipToNext(); |
| return true; |
| } |
| break; |
| case KeyEvent.KEYCODE_MEDIA_PREVIOUS: |
| if ((validActions & PlaybackState.ACTION_SKIP_TO_PREVIOUS) != 0) { |
| onSkipToPrevious(); |
| return true; |
| } |
| break; |
| case KeyEvent.KEYCODE_MEDIA_STOP: |
| if ((validActions & PlaybackState.ACTION_STOP) != 0) { |
| onStop(); |
| return true; |
| } |
| break; |
| case KeyEvent.KEYCODE_MEDIA_FAST_FORWARD: |
| if ((validActions & PlaybackState.ACTION_FAST_FORWARD) != 0) { |
| onFastForward(); |
| return true; |
| } |
| break; |
| case KeyEvent.KEYCODE_MEDIA_REWIND: |
| if ((validActions & PlaybackState.ACTION_REWIND) != 0) { |
| onRewind(); |
| return true; |
| } |
| break; |
| } |
| } |
| } |
| return false; |
| } |
| } |
| |
| /** |
| * A single item that is part of the play queue. It contains a description |
| * of the item and its id in the queue. |
| */ |
| public static final class QueueItem { |
| /** |
| * This id is reserved. No items can be explicitly assigned this id. |
| */ |
| public static final int UNKNOWN_ID = -1; |
| |
| private final MediaDescription mDescription; |
| private final long mId; |
| |
| /** |
| * Create a new {@link MediaSession.QueueItem}. |
| * |
| * @param description The {@link MediaDescription} for this item. |
| * @param id An identifier for this item. It must be unique within the |
| * play queue and cannot be {@link #UNKNOWN_ID}. |
| */ |
| public QueueItem(MediaDescription description, long id) { |
| if (description == null) { |
| throw new IllegalArgumentException("Description cannot be null."); |
| } |
| if (id == UNKNOWN_ID) { |
| throw new IllegalArgumentException("Id cannot be QueueItem.UNKNOWN_ID"); |
| } |
| mDescription = description; |
| mId = id; |
| } |
| |
| public QueueItem(Parcel in) { |
| mDescription = MediaDescription.CREATOR.createFromParcel(in); |
| mId = in.readLong(); |
| } |
| |
| /** |
| * Get the description for this item. |
| */ |
| public MediaDescription getDescription() { |
| return mDescription; |
| } |
| |
| /** |
| * Get the queue id for this item. |
| */ |
| public long getQueueId() { |
| return mId; |
| } |
| |
| /** |
| * Flatten this object in to a Parcel. |
| * |
| * @param dest The Parcel in which the object should be written. |
| * @param flags Additional flags about how the object should be written. |
| */ |
| public void writeToParcel(Parcel dest, int flags) { |
| mDescription.writeToParcel(dest, flags); |
| dest.writeLong(mId); |
| } |
| |
| @Override |
| public String toString() { |
| return "MediaSession.QueueItem {" + "Description=" + mDescription + ", Id=" + mId |
| + " }"; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o == null) { |
| return false; |
| } |
| |
| if (!(o instanceof QueueItem)) { |
| return false; |
| } |
| |
| final QueueItem item = (QueueItem) o; |
| if (mId != item.mId) { |
| return false; |
| } |
| |
| if (!Objects.equals(mDescription, item.mDescription)) { |
| return false; |
| } |
| |
| return true; |
| } |
| } |
| |
| private static final class Command { |
| public final String command; |
| public final Bundle extras; |
| public final ResultReceiver stub; |
| |
| Command(String command, Bundle extras, ResultReceiver stub) { |
| this.command = command; |
| this.extras = extras; |
| this.stub = stub; |
| } |
| } |
| |
| private class CallbackMessageHandler extends Handler { |
| private static final int MSG_COMMAND = 1; |
| private static final int MSG_MEDIA_BUTTON = 2; |
| private static final int MSG_PREPARE = 3; |
| private static final int MSG_PREPARE_MEDIA_ID = 4; |
| private static final int MSG_PREPARE_SEARCH = 5; |
| private static final int MSG_PREPARE_URI = 6; |
| private static final int MSG_PLAY = 7; |
| private static final int MSG_PLAY_MEDIA_ID = 8; |
| private static final int MSG_PLAY_SEARCH = 9; |
| private static final int MSG_PLAY_URI = 10; |
| private static final int MSG_SKIP_TO_ITEM = 11; |
| private static final int MSG_PAUSE = 12; |
| private static final int MSG_STOP = 13; |
| private static final int MSG_NEXT = 14; |
| private static final int MSG_PREVIOUS = 15; |
| private static final int MSG_FAST_FORWARD = 16; |
| private static final int MSG_REWIND = 17; |
| private static final int MSG_SEEK_TO = 18; |
| private static final int MSG_RATE = 19; |
| private static final int MSG_SET_PLAYBACK_SPEED = 20; |
| private static final int MSG_CUSTOM_ACTION = 21; |
| private static final int MSG_ADJUST_VOLUME = 22; |
| private static final int MSG_SET_VOLUME = 23; |
| private static final int MSG_PLAY_PAUSE_KEY_DOUBLE_TAP_TIMEOUT = 24; |
| |
| @SuppressWarnings("WeakerAccess") /* synthetic access */ |
| CallbackWrapper mCallbackWrapper; |
| @SuppressWarnings("WeakerAccess") /* synthetic access */ |
| RemoteUserInfo mCurrentControllerInfo; |
| |
| CallbackMessageHandler(Looper looper, CallbackWrapper callbackWrapper) { |
| super(looper); |
| mCallbackWrapper = callbackWrapper; |
| mCallbackWrapper.mHandler = this; |
| } |
| |
| void post(RemoteUserInfo caller, int what, Object obj, Bundle data, long delayMs) { |
| Pair<RemoteUserInfo, Object> objWithCaller = Pair.create(caller, obj); |
| Message msg = obtainMessage(what, objWithCaller); |
| msg.setAsynchronous(true); |
| msg.setData(data); |
| if (delayMs > 0) { |
| sendMessageDelayed(msg, delayMs); |
| } else { |
| sendMessage(msg); |
| } |
| } |
| |
| @Override |
| public void handleMessage(Message msg) { |
| mCurrentControllerInfo = ((Pair<RemoteUserInfo, Object>) msg.obj).first; |
| |
| VolumeProvider vp; |
| Object obj = ((Pair<RemoteUserInfo, Object>) msg.obj).second; |
| |
| switch (msg.what) { |
| case MSG_COMMAND: |
| Command cmd = (Command) obj; |
| mCallbackWrapper.onCommand(cmd.command, cmd.extras, cmd.stub); |
| break; |
| case MSG_MEDIA_BUTTON: |
| mCallbackWrapper.onMediaButtonEvent((Intent) obj); |
| break; |
| case MSG_PREPARE: |
| mCallbackWrapper.onPrepare(); |
| break; |
| case MSG_PREPARE_MEDIA_ID: |
| mCallbackWrapper.onPrepareFromMediaId((String) obj, msg.getData()); |
| break; |
| case MSG_PREPARE_SEARCH: |
| mCallbackWrapper.onPrepareFromSearch((String) obj, msg.getData()); |
| break; |
| case MSG_PREPARE_URI: |
| mCallbackWrapper.onPrepareFromUri((Uri) obj, msg.getData()); |
| break; |
| case MSG_PLAY: |
| mCallbackWrapper.onPlay(); |
| break; |
| case MSG_PLAY_MEDIA_ID: |
| mCallbackWrapper.onPlayFromMediaId((String) obj, msg.getData()); |
| break; |
| case MSG_PLAY_SEARCH: |
| mCallbackWrapper.onPlayFromSearch((String) obj, msg.getData()); |
| break; |
| case MSG_PLAY_URI: |
| mCallbackWrapper.onPlayFromUri((Uri) obj, msg.getData()); |
| break; |
| case MSG_SKIP_TO_ITEM: |
| mCallbackWrapper.onSkipToQueueItem((Long) obj); |
| break; |
| case MSG_PAUSE: |
| mCallbackWrapper.onPause(); |
| break; |
| case MSG_STOP: |
| mCallbackWrapper.onStop(); |
| break; |
| case MSG_NEXT: |
| mCallbackWrapper.onSkipToNext(); |
| break; |
| case MSG_PREVIOUS: |
| mCallbackWrapper.onSkipToPrevious(); |
| break; |
| case MSG_FAST_FORWARD: |
| mCallbackWrapper.onFastForward(); |
| break; |
| case MSG_REWIND: |
| mCallbackWrapper.onRewind(); |
| break; |
| case MSG_SEEK_TO: |
| mCallbackWrapper.onSeekTo((Long) obj); |
| break; |
| case MSG_RATE: |
| mCallbackWrapper.onSetRating((Rating) obj); |
| break; |
| case MSG_SET_PLAYBACK_SPEED: |
| mCallbackWrapper.onSetPlaybackSpeed((Float) obj); |
| break; |
| case MSG_CUSTOM_ACTION: |
| mCallbackWrapper.onCustomAction((String) obj, msg.getData()); |
| break; |
| case MSG_ADJUST_VOLUME: |
| synchronized (mLock) { |
| vp = mVolumeProvider; |
| } |
| if (vp != null) { |
| vp.onAdjustVolume((int) obj); |
| } |
| break; |
| case MSG_SET_VOLUME: |
| synchronized (mLock) { |
| vp = mVolumeProvider; |
| } |
| if (vp != null) { |
| vp.onSetVolumeTo((int) obj); |
| } |
| break; |
| case MSG_PLAY_PAUSE_KEY_DOUBLE_TAP_TIMEOUT: |
| mCallbackWrapper.handleMediaPlayPauseKeySingleTapIfPending(); |
| break; |
| } |
| mCurrentControllerInfo = null; |
| } |
| } |
| } |