[Android Studio] Firebase FCM 사용법 . Part. 2

 

 

1. Android Studio 코드 추가 

 

1-1. MainActivity 

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
 
    FirebaseApp.initializeApp(this@MainActivity)
	firebaseToken()

}


    private fun firebaseToken() {
        FirebaseMessaging.getInstance().token.addOnCompleteListener(OnCompleteListener { task ->
            if (!task.isSuccessful) {
                Log.w("FCM Test: ", "Fetching FCM registration token failed", task.exception)
                return@OnCompleteListener
            }

            val token = task.result

            Log.d("FCM Test: ", token) //자신의 토큰 확인.
        })
    }

 

 

 

1-2. FirebaseMessageService 클래스 추가 . 

 

class FirebaseMessageService : FirebaseMessagingService() {
    companion object {
        private const val TAG = "FCM Test: "
    }

    override fun onMessageReceived(remoteMessage: RemoteMessage) {
        Log.d(TAG, "Message Notification Body: ${remoteMessage.data}")
        remoteMessage.data.isNotEmpty().let {
            Log.d(TAG, "Message Notification Body: ${remoteMessage.data}")
            val title = remoteMessage.data["title"]
            val body = remoteMessage.data["body"]
            showNotification(title, body)
        }

        remoteMessage.notification?.let {
            Log.d(TAG, "Message Notification Body: ${it.body}")
            showNotification(it.title, it.body)
        }
    }

    private fun showNotification(title: String?, message: String?) {
        val channelId = getString(R.string.notification_channel_id)//자신이 설정할 채널 id
        val channelName = getString(R.string.notification_channel_name) // 자신이 설정할 채널 이름
        val notificationId = 0

        val notificationManager: NotificationManager
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            notificationManager =
                getSystemService(NOTIFICATION_SERVICE) as NotificationManager
            val channel =
                NotificationChannel(channelId, channelName, NotificationManager.IMPORTANCE_DEFAULT)
            notificationManager.createNotificationChannel(channel)
        } else {
            notificationManager = getSystemService(NOTIFICATION_SERVICE) as NotificationManager
        }


        val intent = Intent(this, MainActivity::class.java).apply {
            flags = Intent.FLAG_ACTIVITY_CLEAR_TASK or Intent.FLAG_ACTIVITY_NEW_TASK
        }

        val pendingIntent: PendingIntent = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
            PendingIntent.getActivity(
                this,
                System.currentTimeMillis().toInt(),
                intent,
                PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_MUTABLE
            )
        } else {
            PendingIntent.getActivity(
                this,
                System.currentTimeMillis().toInt(),
                intent,
                PendingIntent.FLAG_UPDATE_CURRENT
            )
        }


        val notificationBuilder = NotificationCompat.Builder(this, channelId)
            .setSmallIcon(R.drawable.ic_launcher_background) // 알림 아이콘
            .setContentTitle(title)
            .setContentText(message)
            .setAutoCancel(true)
            .setContentIntent(pendingIntent)

        notificationManager.notify(notificationId, notificationBuilder.build())
    }


    override fun onNewToken(refreshedToken: String) {
        super.onNewToken(refreshedToken)

        FirebaseMessaging.getInstance().token.addOnCompleteListener { task ->
            if (task.isSuccessful) {
                Log.e(TAG, task.result)
            }
        }
    }
}


fun Activity.getIntentNotification(): Intent {
    return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        Intent().apply {
            action = Settings.ACTION_APP_NOTIFICATION_SETTINGS
            putExtra(Settings.EXTRA_APP_PACKAGE, packageName)
        }
    } else {
        Intent().apply {
            action = "android.settings.APP_NOTIFICATION_SETTINGS"
            putExtra("app_package", packageName)
            putExtra("app_uid", applicationInfo.uid)
        }
    }
}

 

 

 

 

2. Firebase 에서 FCM 보내보기. 

2-1. Firebase 프로젝트 -> Messaging 클릭. 

 

 

 

 

 

2-2. MainActivity 안의 firebaseToken () 에서 확인한 token 확인. 

 

 

 

 

2-3.  Messaging 에서 테스트 메세지 전송 클릭 후 토큰 추가 . 

 

 

 

 

확인.