FCM 通知未在 android 的前台显示

Question

通知在后台显示，但当应用程序在前台时，通知不显示。我应用了许多解决方案，但它们对我不起作用。谁能告诉我我的错误在哪里？提前致谢

这是清单

        <service
        android:exported="false"
        android:name=".services.MyFirebaseMessagingService">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
        </intent-filter>
    </service>

    <meta-data
        android:name="com.google.firebase.messaging.default_notification_icon"
        android:resource="@drawable/cute" />
    <meta-data
        android:name="com.google.firebase.messaging.default_notification_color"
        android:resource="@color/design_default_color_on_primary" />

这是我的 ServicesClass

const val cannelId = "notification_channel"
const val channel_name = "com.dextrologix.dham.rfms.resident.services"
class MyFirebaseMessagingService : FirebaseMessagingService() {
    override fun onMessageReceived(remoteMessage: RemoteMessage) {
        if (remoteMessage.notification != null) {

            genrateNotification(
                remoteMessage.notification!!.title!!,
                remoteMessage.notification!!.body!!
            )
        }
    }
    @SuppressLint("RemoteViewLayout")
    fun getRemoteView(title: String, message: String): RemoteViews {
        val remteViews = RemoteViews(
            "com.dextrologix.dham.rfms.resident.services",
            R.layout.pushnotification_layout
        )
        remteViews.setTextViewText(R.id.notification_title, title)
        remteViews.setTextViewText(R.id.notification_message, message)
        remteViews.setImageViewResource(R.id.notification_image, R.drawable.cute)
        return remteViews
    }
    fun genrateNotification(title: String, message: String) {
        var intent = Intent(this, MainActivity::class.java)
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
        val pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT)
        var builder: NotificationCompat.Builder =
            NotificationCompat.Builder(applicationContext, cannelId)
                .setSmallIcon(R.drawable.person_icon)
                .setAutoCancel(true)
                .setVibrate(longArrayOf(1000, 1000, 1000, 1000))
                .setOnlyAlertOnce(true)
                .setContentIntent(pendingIntent)

        builder = builder.setContent(getRemoteView(title, message))
        val notificationManager =
            getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val notificationChannel =
                NotificationChannel(cannelId, channel_name, NotificationManager.IMPORTANCE_HIGH)
            notificationManager.createNotificationChannel(notificationChannel)
        }
        notificationManager.notify(0, builder.build())

    }

}

Answer 1

您似乎缺少通知渠道。它们是 android 通知所必需的。 docs link