無法解析方法“builder()”

Question

我想在不使用 Firebase 控制台的情況下使用 FCM 向主題發送通知。 當我在Firebase 文檔的幫助下構建新消息時，這是一個問題。

問題圖片

這是我的代碼：

 public void sendToTopic() {

        Message message = Message.builder()
                .putData("score", "850")
                .putData("time", "2:45")
                .setTopic("1")
                .build();


    }

public class MyFirebaseMessagingService extends FirebaseMessagingService {


    private static final String TAG = "MyFirebaseMsgService";
    public void onMessageReceived(RemoteMessage remoteMessage) {

    }


    private void sendNotification(String messageBody) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
                PendingIntent.FLAG_ONE_SHOT);

        String channelId = ("asda");
        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder =
                new NotificationCompat.Builder(this, channelId)
                        .setSmallIcon(R.drawable.book_icon)
                        .setContentTitle("Test")
                        .setContentText(messageBody)
                        .setAutoCancel(true)
                        .setSound(defaultSoundUri)
                        .setContentIntent(pendingIntent);

        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        // Since android Oreo notification channel is needed.
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel(channelId,
                    "Channel human readable title",
                    NotificationManager.IMPORTANCE_DEFAULT);
            notificationManager.createNotificationChannel(channel);
        }

        notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
    }

}

Answer 1

Message類位於 Firebase admin sdk 中，但您不能在您的 android 項目中使用它，您只能在服務器端使用 firebase admin sdk，並且在那里您將能夠使用Message類。 檢查文檔以供參考：-

https://firebase.google.com/docs/cloud-messaging/manage-topics