[Android] Firebase Push Token (feat. WebView)

https://firebase.google.com/docs/cloud-messaging/android/first-message?hl=ko&authuser=0&_gl=1*dvs24r*_ga*MTQyMzQxMTk4My4xNzQxMDYyMjUy*_ga_CW55HF8NVT*MTc0MTA2MjI1MS4xLjEuMTc0MTA2MjM2Ny4xOC4wLjA.#retrieve-the-current-registration-token

백그라운드 앱에 테스트 메시지 보내기  |  Firebase Cloud Messaging

 

 

https://firebase.google.com/docs/cloud-messaging/android/client?hl=ko

Android에서 Firebase 클라우드 메시징 클라이언트 앱 설정  |  Firebase Cloud Messaging

 

https://firebase.google.com/docs/cloud-messaging/android/receive?hl=ko

Android 앱에서 메시지 수신  |  Firebase Cloud Messaging

 

 

https://velog.io/@simsubeen/Android-Kotlin-Firebase-Cloud-Messaging

[Android / Kotlin] Firebase Cloud Messaging - PUSH 알림 받기

 

이렇게 해도 알림이 null로 오는 경우가 있다. 

 

override fun onMessageReceived(remoteMessage: RemoteMessage) {
        super.onMessageReceived(remoteMessage)

        remoteMessage.notification?.let { notification ->
            Log.d(TAG, "Notification Title: ${notification.title}")
            Log.d(TAG, "Notification Body: ${notification.body}")

            // null 체크 후 sendNotification 호출
            val title = notification.title
            val body = notification.body

            if (title != null && body != null) {
                sendNotification(title, body)
            } else {
                Log.w(TAG, "Notification title or body is null, not sending notification.")
            }
        }

        // Data 페이로드 확인
        if (remoteMessage.data.isNotEmpty()) {
            val title = remoteMessage.data["title"].takeUnless { it.isNullOrEmpty() }
                ?: remoteMessage.notification?.title
                ?: "No Title"

            val body = remoteMessage.data["body"].takeUnless { it.isNullOrEmpty() }
                ?: remoteMessage.notification?.body
                ?: "No Body"

            Log.d(TAG, "Received Message - Title: $title, Body: $body")
            sendNotification(title, body)

            Log.d(TAG, "Data Payload - Title: $title, Body: $body")
            sendNotification(title, body)
            return
        }

        // Notification 페이로드 확인
        remoteMessage.notification?.let {
            val title = remoteMessage.data["title"].takeUnless { it.isNullOrEmpty() }
                ?: remoteMessage.notification?.title
                ?: "No Title"

            val body = remoteMessage.data["body"].takeUnless { it.isNullOrEmpty() }
                ?: remoteMessage.notification?.body
                ?: "No Body"

            Log.d(TAG, "Received Message - Title: $title, Body: $body")
            sendNotification(title, body)

            Log.d(TAG, "Notification Payload - Title: $title, Body: $body")
            sendNotification(title, body)
        }

    }

 

이렇게 수정해보자

 

+추가 Android 레벨 13 이상일땐 알림 권한 요청을 보내자, 그러면 앱 다운 받고 유저에게 권한을 물어본다.

 

@RequiresApi(Build.VERSION_CODES.TIRAMISU)
    private val PERMISSIONS = arrayOf(
        Manifest.permission.POST_NOTIFICATIONS
    )

    private val PERMISSION_REQUEST_CODE = 5000


//대충 메인 액티비티 온크리에잍트에
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
            if (!Permission.checkAndRequestPermissions(this, PERMISSIONS, PERMISSION_REQUEST_CODE)) {
                Log.d(TAG, "알림 권한 요청함")
            }
        }