Android通知管理器TransactionTooLargeException

Question

我正在使用具有持续通知的前台服务，该服务会非常频繁地更新。

当服务启动时，我使用通知构建器初始化通知管理器并保留所有引用。

通知具有带按钮的自定义布局。每次用户按下按钮时，我都会更新远程视图并调用 notificationManager.notify（service_id，notificationBuilderCompat.build（））。

最后，经过多次点击后，我收到了TransactionTooLargeException错误，其中包含数据包的大小（以字节为单位）。每个 notify（）都会为此数字添加更多字节。

处理此问题的最佳方法是什么？

所用代码的演示：

class MyService: LifecycleService() {

var notificationBuilderCompat: NotificationCompat.Builder
var notificationManager: NotificationManager
var viewModel: ViewModel
val FOREGROUND_SERVICE = 10
val EXTRA_NOTIFICATION_TYPE = "EXTRA_NOTIFICATION_TYPE"
val NOTIFICATION_CHANNEL_ID = "channel_01"

override fun onCreate() {
    super.onCreate()

    // View model that holds the data
    viewModel = ViewModel()

    registerReceiver(broadcastReceiver, IntentFilter(NOTIFICATION_MESSAGE_INTENT)
    notificationManager = getSytemService(Context.NOTIFICATION_SERVICE) as NotificationManager

    // In case of android O
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
        val channel = NotificationChannel(NOTIFICATION_CHANNEL_ID, "notification_name", NotificationManager.IMPORTNACE_MAX)
        notificationManager.createNotificationChannel(channel)
    }

    notificationBuilderCompat = NotificationCompat.Builder(applicationContext, NOTIFICATION_CHANNEL_ID)
}

ovveride fun onStartCommand(intent: Intent?, flags: Int, startId:Int): Int {

    // Received start notification command
    if (intent.action == START_FOREGROUND_ACTION) {
        setupNotification()
        viewModel.observerData.observe(this, Observer { data ->
            remoteViews.setTextViewText(R.id.notification_text, data)

            // This handles the update with the new data, and also where the exception happens
            notificationManager.notify(FOREGROUND_SERVICE, notificationBuilderCompat.build())
        })
    } else {
        stopForground(true)
        unregisterReceiver(broadcastReceiver)
        stopSelf()
    }
}

fun setupNotification() {
    remoteViews = RemoteViews(packageName, R.layout.item_notification)

    // Setting all the remote views here
    remoteViews.setImageViewResource(R.id.notification_app_icon, R.mipmap.ic_luancher)

    // Setting the click event
    val clickIntent = Intent(NOTIFICATION_MESSAGE_INTENT)
    clickIntent.putExtra(EXTRA_NOTIFICATION_TYPE, 1)
    val clickPendingIntent = PendingIntent.getBroadcast(this, 1, clickIntent, PendingIntent.FLAG_UPDATE_CURRENT)
    remoteVies.setOnClickPendingIntent(R.id.notification_button, clickPendingIntent)

    notificationBuilderCompat.setContent(remoteViews)
        .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
        .setTicker("Notificaion on")
        .setCustomBigContentView(remoteViews)
        .setSmallIcon(R.drawable.icon)
        .setPriority(NotificationCompat.PRIORITY_MAX)
        .setOngoing(true)
        .setOnlyAlertOnce(true)
        .setDefaults(0)

    startForeground(FORGROUND_SERVICE, notificationBuilderCompat.build()
}

// This is the broadcast receiver class to handle the click on the notification button
val broadcastReceiver = object: BroadcastReceiver() {
    ovveride fun onReceive(context: Context?, intent: Intent?) {
        // Getting the notification type
        val notificationType = intent!!.getIntExtra(EXTRA_NOTIFICATION_TYPE, 0)

        if (notificationType == 1) {
            // Updating the data here which invokes the observer
            viewModel.updateData()
        }
    }
}

}