Question

我正在尝试从broadcastReceiver类观察MutableLiveData，但是它不起作用。

我发送了一条通知，并在其上添加了一个操作，该操作启动了未决的Intent。 endingIntent将广播发送到我的NotificationReceiver类，该类扩展了BroadcastReceiver。它进入onReceive函数，并更改MutableLiveData。在另一个类中，我尝试观察此MutableLiveData，但它仅在初始化部分中第一次起作用。但是，当在NotificationReceiver的“ onRecieve”函数中更改MutableLiveData时，该观察器将无法正常工作。

通过操作创建通知

getRegionalCustomer

我的NotificationReceiver类：

val intent = Intent(context, NotificationReceiver::class.java).apply {
    action = "ZOOM"
}

val pendingIntent: PendingIntent =
        PendingIntent.getBroadcast(context, 0, intent, 0)

val notifyBuilder = NotificationCompat.Builder(context, Constants.PRIMARY_CHANNEL_ID)
        .setContentTitle(notificationTitle)
        .setContentText(notificationText)
        .setSmallIcon(notificationIcon)
        .setContentIntent(pendingIntent)
        .setAutoCancel(true)
        .addAction(
                R.drawable.icon,
                "zoom",
                pendingIntent
        )

mNotifyManager?.notify(notificationID, notifyBuilder.build())

观察片段：

class NotificationReceiver: BroadcastReceiver() {
    var shouldZoom = MutableLiveData<Boolean>()

    init {
        shouldZoom.value = false
    }

    override fun onReceive(context: Context?, intent: Intent?) {
        when (intent?.action) {
            "ZOOM" -> zoomLoaction()
        }
    }

    private fun zoomLoaction() {
        shouldZoom.value = true
    }
}

清单：

var notificationReceiver = NotificationReceiver()
notificationReceiver.shouldZoom.observe(this, Observer {
    if (it) {
        // Log
    }
})

如何观察broadcastReceiver的mutableLiveData变量？

0 个答案: