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Add Playback Notification

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Add a MediaStyle Notification for music playback.
This commit is contained in:
OxygenCobalt 2020-10-31 11:50:42 -06:00
parent a4f55873ec
commit e00930cc5f
9 changed files with 204 additions and 96 deletions
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10
app/src/main/java/org/oxycblt/auxio/MainActivity.kt
View file

@ -1,9 +1,11 @@
package org.oxycblt.auxio
import android.content.Context
import android.content.Intent
import android.util.AttributeSet
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import org.oxycblt.auxio.playback.PlaybackService
import org.oxycblt.auxio.theme.accent
// FIXME: Fix bug where fast navigation will break the animations and
@ -16,4 +18,12 @@ class MainActivity : AppCompatActivity(R.layout.activity_main) {
return super.onCreateView(name, context, attrs)
}
override fun onStart() {
super.onStart()
Intent(this, PlaybackService::class.java).also {
this.startService(it)
}
}
}

11
app/src/main/java/org/oxycblt/auxio/MainFragment.kt
View file

@ -1,6 +1,5 @@
package org.oxycblt.auxio
import android.content.Intent
import android.os.Bundle
import android.util.Log
import android.view.LayoutInflater
@ -16,7 +15,6 @@ import com.google.android.material.tabs.TabLayoutMediator
import org.oxycblt.auxio.databinding.FragmentMainBinding
import org.oxycblt.auxio.library.LibraryFragment
import org.oxycblt.auxio.music.MusicStore
import org.oxycblt.auxio.playback.PlaybackService
import org.oxycblt.auxio.playback.PlaybackViewModel
import org.oxycblt.auxio.songs.SongsFragment
import org.oxycblt.auxio.theme.accent
@ -105,15 +103,6 @@ class MainFragment : Fragment() {
}
}
// Start the playback service [If not already]
if (!playbackModel.serviceStarted) {
Intent(requireContext(), PlaybackService::class.java).also {
requireContext().startService(it)
}
playbackModel.setServiceStatus(true)
}
Log.d(this::class.simpleName, "Fragment Created.")
return binding.root

13
app/src/main/java/org/oxycblt/auxio/music/coil/CoilUtils.kt
View file

@ -1,9 +1,11 @@
package org.oxycblt.auxio.music.coil
import android.content.Context
import android.graphics.Bitmap
import android.net.Uri
import android.util.Log
import android.widget.ImageView
import androidx.core.graphics.drawable.toBitmap
import androidx.databinding.BindingAdapter
import coil.Coil
import coil.request.ImageRequest
@ -129,6 +131,17 @@ fun ImageView.bindGenreImage(genre: Genre) {
Coil.imageLoader(context).enqueue(request)
}
// Get a bitmap for a song, onDone will be called when the bitmap is loaded.
fun getBitmap(song: Song, context: Context, onDone: (Bitmap) -> Unit) {
Coil.enqueue(
ImageRequest.Builder(context)
.data(song.album.coverUri)
.error(R.drawable.ic_song)
.target { onDone(it.toBitmap()) }
.build()
)
}
// Get the base request used across the other functions.
private fun getDefaultRequest(context: Context, imageView: ImageView): ImageRequest.Builder {
return ImageRequest.Builder(context)

2
app/src/main/java/org/oxycblt/auxio/playback/PlaybackFragment.kt
View file

@ -138,6 +138,8 @@ class PlaybackFragment : Fragment(), SeekBar.OnSeekBarChangeListener {
binding.playbackLoop.imageTintList = accentColor
binding.playbackLoop.setImageResource(R.drawable.ic_loop)
}
else -> return@observe
}
}

73
app/src/main/java/org/oxycblt/auxio/playback/PlaybackNotificationHolder.kt Normal file
View file

@ -0,0 +1,73 @@
package org.oxycblt.auxio.playback
import android.app.Notification
import android.app.NotificationChannel
import android.app.NotificationManager
import android.content.Context
import android.os.Build
import android.support.v4.media.session.MediaSessionCompat
import androidx.core.app.NotificationCompat
import androidx.media.app.NotificationCompat.MediaStyle
import org.oxycblt.auxio.R
import org.oxycblt.auxio.music.Song
import org.oxycblt.auxio.music.coil.getBitmap
internal class PlaybackNotificationHolder {
private lateinit var mNotification: Notification
private lateinit var notificationManager: NotificationManager
private lateinit var baseNotification: NotificationCompat.Builder
fun init(context: Context, session: MediaSessionCompat) {
// Never run if the notification has already been created
if (!::mNotification.isInitialized) {
notificationManager =
context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
// Create a notification channel if required
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
val channel = NotificationChannel(
CHANNEL_ID,
context.getString(R.string.label_notif_playback),
NotificationManager.IMPORTANCE_DEFAULT
)
notificationManager.createNotificationChannel(channel)
}
baseNotification = NotificationCompat.Builder(context, CHANNEL_ID)
.setSmallIcon(R.drawable.ic_song)
.setStyle(MediaStyle().setMediaSession(session.sessionToken))
.setChannelId(CHANNEL_ID)
.setShowWhen(false)
.setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
mNotification = baseNotification.build()
}
}
fun setMetadata(song: Song, playbackService: PlaybackService) {
// Set the basic metadata since MediaStyle wont do it yourself.
// Fun Fact: The documentation still says that MediaStyle will handle metadata changes
// from MediaSession, even though it doesn't. After 6 years.
baseNotification
.setContentTitle(song.name)
.setContentText(
playbackService.getString(
R.string.format_info,
song.album.artist.name,
song.album.name
)
)
getBitmap(song, playbackService) {
baseNotification.setLargeIcon(it)
mNotification = baseNotification.build()
playbackService.startForeground(NOTIFICATION_ID, mNotification)
}
}
companion object {
const val CHANNEL_ID = "CHANNEL_AUXIO_PLAYBACK"
const val NOTIFICATION_ID = 0xA0A0
}
}

171
app/src/main/java/org/oxycblt/auxio/playback/PlaybackService.kt
View file

@ -1,8 +1,5 @@
package org.oxycblt.auxio.playback
import android.app.Notification
import android.app.NotificationChannel
import android.app.NotificationManager
import android.app.Service
import android.bluetooth.BluetoothDevice
import android.content.BroadcastReceiver
@ -13,11 +10,12 @@ import android.media.AudioManager
import android.os.Build
import android.os.IBinder
import android.os.Parcelable
import android.support.v4.media.MediaMetadataCompat
import android.support.v4.media.session.MediaSessionCompat
import android.util.Log
import android.view.KeyEvent
import androidx.core.app.NotificationCompat
import com.google.android.exoplayer2.C
import com.google.android.exoplayer2.ExoPlaybackException
import com.google.android.exoplayer2.MediaItem
import com.google.android.exoplayer2.Player
import com.google.android.exoplayer2.SimpleExoPlayer
@ -32,49 +30,38 @@ import kotlinx.coroutines.flow.conflate
import kotlinx.coroutines.flow.flow
import kotlinx.coroutines.flow.takeWhile
import kotlinx.coroutines.launch
import org.oxycblt.auxio.R
import org.oxycblt.auxio.music.Song
import org.oxycblt.auxio.music.coil.getBitmap
import org.oxycblt.auxio.music.toURI
import org.oxycblt.auxio.playback.state.LoopMode
import org.oxycblt.auxio.playback.state.PlaybackStateCallback
import org.oxycblt.auxio.playback.state.PlaybackStateManager
private const val CHANNEL_ID = "CHANNEL_AUXIO_PLAYBACK"
private const val NOTIF_ID = 0xA0A0
private const val CONNECTED = 1
private const val DISCONNECTED = 0
// A Service that manages the single ExoPlayer instance and manages the system-side
// aspects of playback.
class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
// TODO: Use the ExoPlayer queue functionality [To an extent]? Could make things faster.
private val player: SimpleExoPlayer by lazy {
val p = SimpleExoPlayer.Builder(applicationContext).build()
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
p.experimentalSetOffloadSchedulingEnabled(true)
}
p.addListener(this)
p
SimpleExoPlayer.Builder(applicationContext).build()
}
private val playbackManager = PlaybackStateManager.getInstance()
private lateinit var mediaSession: MediaSessionCompat
private lateinit var systemReceiver: SystemEventReceiver
private var changeIsFromSystem = false
private val notificationHolder = PlaybackNotificationHolder()
private var changeIsFromAudioFocus = true
private val serviceJob = Job()
private val serviceScope = CoroutineScope(
serviceJob + Dispatchers.Main
)
private lateinit var notification: Notification
// --- SERVICE OVERRIDES ---
override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
Log.d(this::class.simpleName, "Service is active.")
return START_STICKY
return START_NOT_STICKY
}
override fun onBind(intent: Intent): IBinder? = null
@ -82,16 +69,8 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
override fun onCreate() {
super.onCreate()
// Set up the media button callbacks
mediaSession = MediaSessionCompat(this, packageName).apply {
isActive = true
}
val connector = MediaSessionConnector(mediaSession)
connector.setPlayer(player)
connector.setMediaButtonEventHandler { _, _, mediaButtonEvent ->
handleMediaButtonEvent(mediaButtonEvent)
}
// --- PLAYER SETUP ---
player.addListener(this)
// Set up AudioFocus/AudioAttributes
player.setAudioAttributes(
@ -102,7 +81,31 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
true
)
notification = createNotification()
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
player.experimentalSetOffloadSchedulingEnabled(true)
}
// --- PLAYBACKSTATEMANAGER SETUP ---
playbackManager.addCallback(this)
if (playbackManager.song != null) {
restorePlayer()
}
// --- SYSTEM RECEIVER SETUP ---
// Set up the media button callbacks
mediaSession = MediaSessionCompat(this, packageName).apply {
isActive = true
MediaSessionConnector(this).apply {
setPlayer(player)
setMediaButtonEventHandler { _, _, mediaButtonEvent ->
handleMediaButtonEvent(mediaButtonEvent)
}
}
}
// Set up callback for system events
systemReceiver = SystemEventReceiver()
@ -115,7 +118,9 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
registerReceiver(systemReceiver, this)
}
playbackManager.addCallback(this)
// --- NOTIFICATION SETUP ---
notificationHolder.init(applicationContext, mediaSession)
}
override fun onDestroy() {
@ -136,6 +141,8 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
// --- PLAYER EVENT LISTENER OVERRIDES ---
override fun onPlaybackStateChanged(state: Int) {
changeIsFromAudioFocus = false
if (state == Player.STATE_ENDED) {
playbackManager.next()
} else if (state == Player.STATE_READY) {
@ -144,13 +151,11 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
}
override fun onIsPlayingChanged(isPlaying: Boolean) {
// If the change to playing occurred from the system instead of PlaybackStateManager, then
// sync the playing value to PlaybackStateManager to keep it up ton date.
if (isPlaying != playbackManager.isPlaying && changeIsFromSystem) {
// Only sync the playing status with PlaybackStateManager if the change occurred
// from an Audio Focus change. Nowhere else.
if (isPlaying != playbackManager.isPlaying && changeIsFromAudioFocus) {
playbackManager.setPlayingStatus(isPlaying)
}
changeIsFromSystem = true
}
override fun onMediaItemTransition(mediaItem: MediaItem?, reason: Int) {
@ -162,30 +167,46 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
}
}
override fun onPlayerError(error: ExoPlaybackException) {
// If there's any issue, just go to the next song.
playbackManager.next()
}
override fun onPositionDiscontinuity(reason: Int) {
if (reason == Player.DISCONTINUITY_REASON_SEEK) {
playbackManager.setPosition(player.currentPosition / 1000)
}
}
// --- PLAYBACK STATE CALLBACK OVERRIDES ---
override fun onSongUpdate(song: Song?) {
changeIsFromSystem = false
changeIsFromAudioFocus = false
song?.let {
val item = MediaItem.fromUri(it.id.toURI())
player.setMediaItem(item)
player.prepare()
player.play()
uploadMetadataToSession(it)
notificationHolder.setMetadata(playbackManager.song!!, this)
return
}
// Stop playing/the notification if there's nothing to play.
player.stop()
stopForeground(true)
}
override fun onPlayingUpdate(isPlaying: Boolean) {
changeIsFromSystem = false
changeIsFromAudioFocus = false
if (isPlaying && !player.isPlaying) {
player.play()
startForeground(NOTIF_ID, notification)
startPollingPosition()
} else {
player.pause()
@ -196,7 +217,7 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
}
override fun onLoopUpdate(mode: LoopMode) {
changeIsFromSystem = false
changeIsFromAudioFocus = false
when (mode) {
LoopMode.NONE -> {
@ -209,16 +230,44 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
}
override fun onSeekConfirm(position: Long) {
changeIsFromSystem = false
changeIsFromAudioFocus = false
player.seekTo(position * 1000)
}
// --- OTHER FUNCTIONS ---
private fun restorePlayer() {
playbackManager.song?.let {
val item = MediaItem.fromUri(it.id.toURI())
player.setMediaItem(item)
player.prepare()
player.play()
notificationHolder.setMetadata(it, this)
}
}
private fun uploadMetadataToSession(song: Song) {
val builder = MediaMetadataCompat.Builder()
.putString(MediaMetadataCompat.METADATA_KEY_TITLE, song.name)
.putString(MediaMetadataCompat.METADATA_KEY_DISPLAY_TITLE, song.name)
.putString(MediaMetadataCompat.METADATA_KEY_ARTIST, song.album.artist.name)
.putString(MediaMetadataCompat.METADATA_KEY_AUTHOR, song.album.artist.name)
.putString(MediaMetadataCompat.METADATA_KEY_COMPOSER, song.album.artist.name)
.putString(MediaMetadataCompat.METADATA_KEY_ALBUM_ARTIST, song.album.artist.name)
.putString(MediaMetadataCompat.METADATA_KEY_ALBUM, song.album.name)
.putLong(MediaMetadataCompat.METADATA_KEY_DURATION, song.duration)
getBitmap(song, this) {
builder.putBitmap(MediaMetadataCompat.METADATA_KEY_ALBUM_ART, it)
mediaSession.setMetadata(builder.build())
}
}
// Awful Hack to get position polling to work, as exoplayer does not provide any
// onPositionChanged callback for some inane reason.
// FIXME: There has to be a better way of polling positions.
// TODO: MediaSession might have a callback for positions. Idk.
private fun pollCurrentPosition() = flow {
while (player.isPlaying) {
emit(player.currentPosition)
@ -274,35 +323,6 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
return false
}
// Create a notification
// TODO: Spin this off into its own object!
private fun createNotification(): Notification {
val notificationManager =
getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
val channel = NotificationChannel(
CHANNEL_ID,
getString(R.string.label_notif_playback),
NotificationManager.IMPORTANCE_DEFAULT
)
notificationManager.createNotificationChannel(channel)
}
// TODO: Placeholder, implement proper media controls.
val notif = NotificationCompat.Builder(
applicationContext,
CHANNEL_ID
)
.setSmallIcon(R.drawable.ic_song)
.setContentTitle(getString(R.string.app_name))
.setContentText(getString(R.string.label_is_playing))
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setChannelId(CHANNEL_ID)
.build()
return notif
}
// BroadcastReceiver for receiving system events [E.G Headphones connected/disconnected]
private inner class SystemEventReceiver : BroadcastReceiver() {
override fun onReceive(context: Context, intent: Intent) {
@ -348,4 +368,9 @@ class PlaybackService : Service(), Player.EventListener, PlaybackStateCallback {
}
}
}
companion object {
private const val DISCONNECTED = 0
private const val CONNECTED = 1
}
}

7
app/src/main/java/org/oxycblt/auxio/playback/PlaybackViewModel.kt
View file

@ -48,9 +48,6 @@ class PlaybackViewModel : ViewModel(), PlaybackStateCallback {
private val mIsSeeking = MutableLiveData(false)
val isSeeking: LiveData<Boolean> get() = mIsSeeking
private var mServiceStarted = false
val serviceStarted: Boolean get() = mServiceStarted
val formattedPosition = Transformations.map(mPosition) {
it.toDuration()
}
@ -190,10 +187,6 @@ class PlaybackViewModel : ViewModel(), PlaybackStateCallback {
mIsSeeking.value = value
}
fun setServiceStatus(value: Boolean) {
mServiceStarted = value
}
// --- OVERRIDES ---
override fun onCleared() {

12
app/src/main/java/org/oxycblt/auxio/playback/state/PlaybackStateManager.kt
View file

@ -11,17 +11,19 @@ import org.oxycblt.auxio.music.Song
import kotlin.random.Random
// The manager of the current playback state [Current Song, Queue, Shuffling]
// Never use this for ANYTHING UI related, that's what PlaybackViewModel is for.
// Yes, I know MediaSessionCompat and friends exist, but I like having full control over the
// playback state instead of dealing with android's likely buggy code.
class PlaybackStateManager {
// This class is for sole use by the classes in /playback/.
// If you want to add system-side things, add to PlaybackService.
// If you want to add ui-side things, add to PlaybackViewModel.
// [Yes, I know MediaSessionCompat exists, but I like having full control over the
// playback state instead of dealing with android's likely buggy code.]
internal class PlaybackStateManager {
// Playback
private var mSong: Song? = null
set(value) {
field = value
callbacks.forEach { it.onSongUpdate(value) }
}
private var mPosition: Long = 0
private var mPosition: Long = 0 // TODO: Consider using millis instead of seconds?
set(value) {
field = value
callbacks.forEach { it.onPositionUpdate(value) }

1
app/src/main/res/values/strings.xml
View file

@ -56,6 +56,7 @@
<string name="placeholder_genre">Unknown Genre</string>
<string name="placeholder_artist">Unknown Artist</string>
<string name="placeholder_album">Unknown Album</string>
<string name="placeholder_song">Unknown Song</string>
<string name="placeholder_no_date">No Date</string>
<!-- Format Namespace | Value formatting/plurals -->