Fix: remove orphaned old class body from KryzAutoMediaBrowserService #5
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package com.example.kryz_go_flutter
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import android.app.Notification
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import android.app.NotificationChannel
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import android.app.NotificationManager
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import android.content.ComponentName
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import android.content.Context
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import android.media.AudioAttributes
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import android.media.AudioFocusRequest
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import android.media.AudioManager
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import android.media.MediaPlayer
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import android.net.Uri
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import android.os.Build
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import android.os.Bundle
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import android.support.v4.media.MediaBrowserCompat.MediaItem
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import android.support.v4.media.MediaDescriptionCompat
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import android.support.v4.media.MediaMetadataCompat
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import android.support.v4.media.session.MediaSessionCompat
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import android.support.v4.media.session.PlaybackStateCompat
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import android.util.Log
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import androidx.core.app.NotificationCompat
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import androidx.media.MediaBrowserServiceCompat
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/**
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* MediaBrowserService for Android Auto.
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*
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* Android Auto connects to this service to browse content and control playback.
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*
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* Two playback modes:
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* 1. Cold start (Flutter not running): the service plays the stream directly via
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* MediaPlayer. This avoids the unreliable startActivity → Flutter bridge.
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* 2. Warm start (Flutter running): MainActivity registers play/stop callbacks so
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* Auto commands are forwarded through the method channel to just_audio.
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*
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* When the Flutter app opens while the service is playing, MainActivity stops the
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* service's MediaPlayer and Flutter takes over seamlessly.
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*
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* Brand color (#E36A18) is declared on this service via KryzAutoTheme in styles.xml
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* so Android Auto accents its media UI with the KRYZ orange.
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*/
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class KryzAutoMediaBrowserService : MediaBrowserServiceCompat() {
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companion object {
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private const val TAG = "KryzAutoService"
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private const val MEDIA_ID_ROOT = "kryz_root"
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private const val MEDIA_ID_LIVE = "kryz_live_stream"
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private const val STREAM_URL = "https://kryz.out.airtime.pro/kryz_a"
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private const val NOTIFICATION_CHANNEL_ID = "com.kryzgoflutter.auto.channel"
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private const val NOTIFICATION_ID = 1001
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private var instance: KryzAutoMediaBrowserService? = null
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// Called by MainActivity to mirror Flutter playback state into the MediaSession.
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fun updatePlaybackState(isPlaying: Boolean, isBuffering: Boolean) {
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instance?.applyPlaybackState(isPlaying, isBuffering)
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}
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// Called by MainActivity when Flutter is alive and taking over from the service player.
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fun stopServicePlayer() {
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instance?.stopServicePlayback()
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}
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fun isServicePlaying(): Boolean {
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return try {
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instance?.serviceMediaPlayer?.isPlaying == true
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} catch (_: IllegalStateException) {
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false
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}
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}
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// Flutter-side play/stop callbacks registered by MainActivity when Flutter is ready.
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private var directPlayCallback: (() -> Unit)? = null
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private var directStopCallback: (() -> Unit)? = null
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fun registerDirectCallbacks(play: () -> Unit, stop: () -> Unit) {
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directPlayCallback = play
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directStopCallback = stop
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}
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fun unregisterDirectCallbacks() {
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directPlayCallback = null
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directStopCallback = null
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}
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}
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private lateinit var mediaSession: MediaSessionCompat
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private var serviceMediaPlayer: MediaPlayer? = null
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private var audioFocusRequest: AudioFocusRequest? = null
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private val mediaSessionCallback = object : MediaSessionCompat.Callback() {
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override fun onPlay() {
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Log.d(TAG, "onPlay()")
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triggerPlay()
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}
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override fun onStop() {
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Log.d(TAG, "onStop()")
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val stop = directStopCallback
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if (stop != null) {
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stop()
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} else {
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stopServicePlayback()
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}
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}
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override fun onPlayFromMediaId(mediaId: String?, extras: Bundle?) {
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Log.d(TAG, "onPlayFromMediaId: $mediaId")
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if (mediaId == MEDIA_ID_LIVE) triggerPlay()
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}
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override fun onPlayFromSearch(query: String?, extras: Bundle?) {
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Log.d(TAG, "onPlayFromSearch: $query")
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triggerPlay()
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}
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}
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private fun triggerPlay() {
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val play = directPlayCallback
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if (play != null) {
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// Flutter is running — signal buffering then let Flutter handle audio.
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applyPlaybackState(isPlaying = false, isBuffering = true)
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play()
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} else {
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// Flutter is not running — play directly via MediaPlayer.
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startServicePlayback()
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}
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}
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override fun onCreate() {
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super.onCreate()
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instance = this
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Log.d(TAG, "onCreate()")
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createNotificationChannel()
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try {
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mediaSession = MediaSessionCompat(
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this,
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TAG,
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ComponentName(this, com.ryanheise.audioservice.MediaButtonReceiver::class.java),
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null,
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).apply {
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setCallback(mediaSessionCallback)
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@Suppress("DEPRECATION")
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setFlags(
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MediaSessionCompat.FLAG_HANDLES_MEDIA_BUTTONS or
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MediaSessionCompat.FLAG_HANDLES_TRANSPORT_CONTROLS
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)
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setPlaybackState(
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PlaybackStateCompat.Builder()
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.setActions(
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PlaybackStateCompat.ACTION_PLAY or
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PlaybackStateCompat.ACTION_STOP or
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PlaybackStateCompat.ACTION_PLAY_FROM_MEDIA_ID or
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PlaybackStateCompat.ACTION_PLAY_FROM_SEARCH
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)
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.setState(PlaybackStateCompat.STATE_STOPPED, 0, 1f)
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.build()
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)
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setMetadata(buildLiveStreamMetadata())
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isActive = true
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}
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sessionToken = mediaSession.sessionToken
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Log.d(TAG, "MediaSession created, sessionToken set")
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} catch (e: Exception) {
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Log.e(TAG, "Failed to create MediaSession", e)
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}
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}
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override fun onGetRoot(
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clientPackageName: String,
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clientUid: Int,
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rootHints: Bundle?
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): BrowserRoot {
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Log.d(TAG, "onGetRoot() from $clientPackageName")
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return BrowserRoot(MEDIA_ID_ROOT, null)
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}
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override fun onLoadChildren(
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parentId: String,
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result: Result<List<MediaItem>>
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) {
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Log.d(TAG, "onLoadChildren($parentId)")
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if (parentId == MEDIA_ID_ROOT) {
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val iconUri = Uri.parse("android.resource://${packageName}/mipmap/ic_launcher")
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val description = MediaDescriptionCompat.Builder()
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.setMediaId(MEDIA_ID_LIVE)
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.setTitle("KRYZ Live Stream")
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.setSubtitle("KRYZ Radio")
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.setIconUri(iconUri)
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.setMediaUri(Uri.parse(STREAM_URL))
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.build()
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result.sendResult(listOf(MediaItem(description, MediaItem.FLAG_PLAYABLE)))
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} else {
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result.sendResult(emptyList())
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}
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}
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override fun onDestroy() {
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Log.d(TAG, "onDestroy()")
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stopServicePlayback()
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instance = null
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if (::mediaSession.isInitialized) mediaSession.release()
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super.onDestroy()
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}
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// Direct MediaPlayer playback used when Flutter is not running (cold Auto start).
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private fun startServicePlayback() {
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Log.d(TAG, "startServicePlayback()")
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stopServicePlayback()
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applyPlaybackState(isPlaying = false, isBuffering = true)
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startForeground(NOTIFICATION_ID, buildNotification(isPlaying = false))
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requestAudioFocus()
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val player = MediaPlayer()
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try {
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player.setAudioAttributes(
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AudioAttributes.Builder()
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.setUsage(AudioAttributes.USAGE_MEDIA)
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.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
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.build()
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)
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player.setDataSource(STREAM_URL)
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player.setOnPreparedListener { mp ->
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Log.d(TAG, "MediaPlayer prepared → starting")
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mp.start()
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applyPlaybackState(isPlaying = true, isBuffering = false)
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startForeground(NOTIFICATION_ID, buildNotification(isPlaying = true))
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}
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player.setOnInfoListener { _, what, _ ->
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when (what) {
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MediaPlayer.MEDIA_INFO_BUFFERING_START ->
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applyPlaybackState(isPlaying = false, isBuffering = true)
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MediaPlayer.MEDIA_INFO_BUFFERING_END ->
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applyPlaybackState(isPlaying = true, isBuffering = false)
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}
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true
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}
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player.setOnErrorListener { _, what, extra ->
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Log.e(TAG, "MediaPlayer error what=$what extra=$extra")
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applyPlaybackState(isPlaying = false, isBuffering = false)
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@Suppress("DEPRECATION")
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stopForeground(true)
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true
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}
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player.prepareAsync()
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serviceMediaPlayer = player
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} catch (e: Exception) {
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Log.e(TAG, "Failed to start service playback: ${e.message}")
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player.release()
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applyPlaybackState(isPlaying = false, isBuffering = false)
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@Suppress("DEPRECATION")
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stopForeground(true)
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}
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}
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private fun stopServicePlayback() {
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val player = serviceMediaPlayer ?: return
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Log.d(TAG, "stopServicePlayback()")
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serviceMediaPlayer = null
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try {
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if (player.isPlaying) player.stop()
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player.release()
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} catch (e: Exception) {
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Log.e(TAG, "Error releasing MediaPlayer: ${e.message}")
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}
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abandonAudioFocus()
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applyPlaybackState(isPlaying = false, isBuffering = false)
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@Suppress("DEPRECATION")
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stopForeground(true)
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}
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private fun applyPlaybackState(isPlaying: Boolean, isBuffering: Boolean) {
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if (!::mediaSession.isInitialized) return
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val state = when {
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isPlaying -> PlaybackStateCompat.STATE_PLAYING
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isBuffering -> PlaybackStateCompat.STATE_BUFFERING
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else -> PlaybackStateCompat.STATE_STOPPED
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}
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val actions = if (isPlaying || isBuffering) {
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PlaybackStateCompat.ACTION_STOP
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} else {
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PlaybackStateCompat.ACTION_PLAY or
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PlaybackStateCompat.ACTION_PLAY_FROM_MEDIA_ID or
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PlaybackStateCompat.ACTION_PLAY_FROM_SEARCH
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}
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mediaSession.setPlaybackState(
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PlaybackStateCompat.Builder()
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.setActions(actions)
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.setState(state, PlaybackStateCompat.PLAYBACK_POSITION_UNKNOWN, 1f)
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.build()
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)
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Log.d(TAG, "applyPlaybackState: playing=$isPlaying buffering=$isBuffering")
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}
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private fun requestAudioFocus() {
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val audioManager = getSystemService(Context.AUDIO_SERVICE) as AudioManager
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
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val req = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN)
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.setAudioAttributes(
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AudioAttributes.Builder()
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.setUsage(AudioAttributes.USAGE_MEDIA)
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.setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
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.build()
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)
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.build()
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audioFocusRequest = req
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audioManager.requestAudioFocus(req)
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} else {
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@Suppress("DEPRECATION")
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audioManager.requestAudioFocus(null, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN)
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}
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}
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private fun abandonAudioFocus() {
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val audioManager = getSystemService(Context.AUDIO_SERVICE) as AudioManager
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
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audioFocusRequest?.let { audioManager.abandonAudioFocusRequest(it) }
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audioFocusRequest = null
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}
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}
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private fun createNotificationChannel() {
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
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val channel = NotificationChannel(
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NOTIFICATION_CHANNEL_ID,
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"KRYZ Auto Playback",
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NotificationManager.IMPORTANCE_LOW,
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).apply {
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description = "KRYZ Radio Android Auto playback"
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setShowBadge(false)
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}
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val mgr = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
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mgr.createNotificationChannel(channel)
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}
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}
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private fun buildNotification(isPlaying: Boolean): Notification {
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return NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
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.setContentTitle("KRYZ Radio")
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.setContentText(if (isPlaying) "Playing via Android Auto" else "Connecting…")
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.setSmallIcon(R.mipmap.ic_launcher)
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.setOngoing(isPlaying)
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.setSilent(true)
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.build()
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}
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private fun buildLiveStreamMetadata(): MediaMetadataCompat {
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val iconUri = Uri.parse("android.resource://${packageName}/mipmap/ic_launcher")
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return MediaMetadataCompat.Builder()
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.putString(MediaMetadataCompat.METADATA_KEY_TITLE, "KRYZ Live Stream")
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.putString(MediaMetadataCompat.METADATA_KEY_ARTIST, "KRYZ Radio")
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.putString(MediaMetadataCompat.METADATA_KEY_ALBUM, "Live")
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.putString(MediaMetadataCompat.METADATA_KEY_MEDIA_ID, MEDIA_ID_LIVE)
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.putString(MediaMetadataCompat.METADATA_KEY_MEDIA_URI, STREAM_URL)
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.putString(MediaMetadataCompat.METADATA_KEY_ALBUM_ART_URI, iconUri.toString())
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.putString(MediaMetadataCompat.METADATA_KEY_DISPLAY_ICON_URI, iconUri.toString())
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.build()
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}
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}
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Reference in New Issue
Block a user