ForegroundService没有从片段开始？

Posted 2021-03-31

我正在尝试从片段启动服务，但我的代码似乎没有正常运行，或者我认为我如何处理上下文有问题。当我从一个活动内部启动我的服务时它运行正常但它在片段内部不起作用。

这是我的片段类：

class OnAirFragment : BaseFragment() {

    private var play = "Play"
    private var playValue = false
    private lateinit var updatePlaybackUI: BroadcastReceiver

    private var playWhenReady = "Play State"
    private var playbackState = "Playback State"

    private var isClicked = false


    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {
        // Inflate the layout for this fragment
        val view = inflater.inflate(R.layout.fragment_on_air, container, false)

        view.start.setOnClickListener {
            Log.d("TEST", "TAP")
            if (!isClicked) {
                Log.d("TEST2", "TAP2")

                start.setBackgroundResource(R.drawable.ic_pause_empty)

                val intent = Intent(context, PlaybackService::class.java)
                intent.putExtra(play, playValue)
                Util.startForegroundService(context, intent)


                var intentToService = Intent("activity.to.service.transfer")
                intentToService.putExtra("x", true)

                context!!.sendBroadcast(intentToService)


                val filter = IntentFilter()
                filter.addAction("service.to.activity.transfer")
                updatePlaybackUI = object : BroadcastReceiver() {
                    override fun onReceive(context: Context, intent: Intent?) {
                        // UI update here
                        var playPauseState = intent!!.getBooleanExtra(playWhenReady, true)
                        var stopState = intent.getIntExtra(playbackState, Int.MAX_VALUE)

                        if (!playPauseState || stopState == 1) {
                            start.setBackgroundResource(R.drawable.ic_play_empty)
                            isClicked = false

                        } else {
                            start.setBackgroundResource(R.drawable.ic_pause_empty)
                        }
                    }
                }
                context!!.registerReceiver(updatePlaybackUI, filter)
                isClicked = !isClicked

            } else {
                Log.d("TEST3", "TAP3")
                playValue = false

                start.setBackgroundResource(R.drawable.ic_play_empty)

                val intent = Intent(context, PlaybackService::class.java)
                intent.putExtra(play, playValue)
                context!!.stopService(intent)
                isClicked = !isClicked
            }

        }


        return view
    }
}

这是我的服务类：

class PlaybackService : Service() {
    private var player: SimpleExoPlayer? = null
    private var playerNotificationManager: PlayerNotificationManager? = null
    private var mediaSession: MediaSessionCompat? = null

    private lateinit var receiver: BroadcastReceiver


    private var playWhenReady = "Play State"
    private var playbackState = "Playback State"

    override fun onCreate() {
        super.onCreate()
        val context = this

        player = ExoPlayerFactory.newSimpleInstance(context, DefaultTrackSelector())
        val dataSourceFactory = DefaultDataSourceFactory(
                context, Util.getUserAgent(context, "Exo"))

        val mediaUri = Uri.parse("http://www.radioideal.net:8026/;")
        val mediaSource = ExtractorMediaSource.Factory(dataSourceFactory)
                .createMediaSource(mediaUri)

        player!!.prepare(mediaSource)
        player!!.playWhenReady = true

        val filter = IntentFilter()
        filter.addAction("activity.to.service.transfer")
        receiver = object : BroadcastReceiver() {
            override fun onReceive(context: Context, intent: Intent?) {
                var play = intent!!.getBooleanExtra("x", true)
                player!!.playWhenReady = play
            }
        }
        registerReceiver(receiver, filter)

        player?.addListener(eventListener)

        playerNotificationManager = PlayerNotificationManager.createWithNotificationChannel(
                context,
                "BREAKFAST RADIO",
                R.string.exo_download_notification_channel_name,
                1000,
                object : PlayerNotificationManager.MediaDescriptionAdapter {
                    override fun getCurrentContentTitle(player: Player): String {
                        return "BR Live"
                    }

                    @Nullable
                    override fun createCurrentContentIntent(player: Player): PendingIntent? {
                        return null
                    }

                    @Nullable
                    override fun getCurrentContentText(player: Player): String? {
                        return "BR Live"
                    }

                    @Nullable
                    override fun getCurrentLargeIcon(player: Player, callback: PlayerNotificationManager.BitmapCallback): Bitmap? {
                        return BitmapFactory.decodeResource(context.resources, R.drawable.exo_controls_play)
                    }
                }
        )
        playerNotificationManager!!.setNotificationListener(object : PlayerNotificationManager.NotificationListener {
            override fun onNotificationStarted(notificationId: Int, notification: Notification) {
                startForeground(notificationId, notification)
            }

            override fun onNotificationCancelled(notificationId: Int) {
                stopSelf()
            }
        })
        playerNotificationManager!!.setPlayer(player)


        playerNotificationManager?.setFastForwardIncrementMs(0)
        playerNotificationManager?.setRewindIncrementMs(0)
        playerNotificationManager?.setUseNavigationActions(false)


        val playbackStateBuilder = PlaybackStateCompat.Builder()
        playbackStateBuilder.setActions(PlaybackStateCompat.ACTION_PLAY or PlaybackStateCompat.ACTION_PAUSE)

        mediaSession = MediaSessionCompat(context, "BREAKFAST")
        mediaSession!!.isActive = true
        mediaSession?.setPlaybackState(playbackStateBuilder.build())
        playerNotificationManager!!.setMediaSessionToken(mediaSession!!.sessionToken)

    }

    override fun onDestroy() {
        mediaSession!!.release()
        playerNotificationManager!!.setPlayer(null)
        player!!.release()
        player = null

        super.onDestroy()
    }

    @Nullable
    override fun onBind(intent: Intent): IBinder? {
        return null
    }

    override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
        return Service.START_STICKY
    }

    private var eventListener: Player.EventListener = object : Player.EventListener {
        override fun onPlaybackParametersChanged(playbackParameters: PlaybackParameters?) {
            var i = 0
        }

        override fun onSeekProcessed() {
            var i = 0
        }

        override fun onTracksChanged(trackGroups: TrackGroupArray?, trackSelections: TrackSelectionArray?) {
            var i = 0
        }

        override fun onPlayerError(error: ExoPlaybackException?) {
            var i = 0
        }

        override fun onLoadingChanged(isLoading: Boolean) {
            var i = 0
        }

        override fun onPositionDiscontinuity(reason: Int) {
            var i = 0
        }

        override fun onRepeatModeChanged(repeatMode: Int) {
            var i = 0
        }

        override fun onShuffleModeEnabledChanged(shuffleModeEnabled: Boolean) {
            var i = 0
        }

        override fun onTimelineChanged(timeline: Timeline?, manifest: Any?, reason: Int) {
            var i = 0
        }

        override fun onPlayerStateChanged(playWhenReady: Boolean, playbackState: Int) {
            sendPlaybackState(playWhenReady, playbackState)
        }
    }

    private fun sendPlaybackState(playWhenReadyValue: Boolean, playbackStateValue: Int) {
        var intent = Intent("service.to.activity.transfer")
        intent.putExtra(playWhenReady, playWhenReadyValue)
        intent.putExtra(playbackState, playbackStateValue)

        sendBroadcast(intent)
    }
}

而且我不确定我的广播接收器是否正常工作。

答案

在你的片段类中：

            val intent = Intent(context, PlaybackService::class.java) //what's context?
            intent.putExtra(play, playValue)
            Util.startForegroundService(context, intent)//what's context?

通常应该是这样的：

 startService(new Intent(getActivity(),myPlayService.class)); 

另一答案

在Manifest.xml中注册服务