從 FCM HTTP v1 API 遷移至 AndroidConfigV2

import androidx.core.app.NotificationCompat
import com.google.firebase.messaging.FirebaseMessagingService
import com.google.firebase.messaging.NotificationResponse
import com.google.firebase.messaging.RemoteMessage

class MyFirebaseMessagingService : FirebaseMessagingService() {

    override fun onNotificationReceived(message: RemoteMessage): NotificationResponse {
        val serverNotif = message.notification
        val channelId = serverNotif?.channelId ?: "default_channel"
        // Keep the server-defined title unchanged, or fall back to default
        val title = serverNotif?.title ?: "New message"
        // Modify the notification body on-device (for example, decrypting data)
        val decryptedBody = decryptPayload(message.data["encrypted_content"])

        val builder = NotificationCompat.Builder(this, channelId)
            .setSmallIcon(R.drawable.ic_stat_notification)
            .setContentTitle(title)
            .setContentText(decryptedBody)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setAutoCancel(true)

        // Return the response for the open-source FCM SDK to post to the Android platform
        return NotificationResponse.create("optional_tag", 100, builder.build())
    }
}

import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;
import com.google.firebase.messaging.NotificationResponse;
import androidx.core.app.NotificationCompat;

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    @Override
    public NotificationResponse onNotificationReceived(RemoteMessage message) {
        RemoteMessage.Notification serverNotif = message.getNotification();
        String channelId = (serverNotif != null && serverNotif.getChannelId() != null)
                ? serverNotif.getChannelId()
                : "default_channel";
        // Keep the server-defined title unchanged, or fall back to default
        String title = (serverNotif != null && serverNotif.getTitle() != null)
                ? serverNotif.getTitle()
                : "New message";
        // Modify the notification body on-device (for example, decrypting data)
        String decryptedBody = decryptPayload(message.getData().get("encrypted_content"));

        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, channelId)
                .setSmallIcon(R.drawable.ic_stat_notification)
                .setContentTitle(title)
                .setContentText(decryptedBody)
                .setPriority(NotificationCompat.PRIORITY_HIGH)
                .setAutoCancel(true);

        // Return the response for the open-source FCM SDK to post to the Android platform
        return NotificationResponse.create("optional_tag", 100, builder.build());
    }
}

import androidx.lifecycle.Lifecycle
import androidx.lifecycle.ProcessLifecycleOwner

override fun onNotificationReceived(message: RemoteMessage): NotificationResponse {
    val chatId = message.data["chat_id"]
    val isAppForeground = ProcessLifecycleOwner.get()
        .lifecycle
        .currentState
        .isAtLeast(Lifecycle.State.STARTED)

    if (isAppForeground && chatRepository.isConversationActive(chatId)) {
        // Suppress notification display because the user is actively viewing this chat
        return NotificationResponse.suppress()
    }

    val builder = buildNotificationForChat(message)
    return NotificationResponse.create("chat_tag", 101, builder.build())
}

import androidx.lifecycle.Lifecycle;
import androidx.lifecycle.ProcessLifecycleOwner;

@Override
public NotificationResponse onNotificationReceived(RemoteMessage message) {
    String chatId = message.getData().get("chat_id");
    boolean isAppForeground = ProcessLifecycleOwner.get()
            .getLifecycle()
            .getCurrentState()
            .isAtLeast(Lifecycle.State.STARTED);

    if (isAppForeground && chatRepository.isConversationActive(chatId)) {
        // Suppress notification display because the user is actively viewing this chat
        return NotificationResponse.suppress();
    }

    NotificationCompat.Builder builder = buildNotificationForChat(message);
    return NotificationResponse.create("chat_tag", 101, builder.build());
}

override fun onNotificationReceived(message: RemoteMessage): NotificationResponse {
    // Retrieve the scoped manager for this message execution
    val manager = getFcmNotificationManager(message)

    // 1. Cancel an outdated notification right away
    manager.cancelNow("message_tag", 50)

    // 2. Post the item notification immediately
    val itemNotif = NotificationCompat.Builder(this, "chat_channel")
        .setSmallIcon(R.drawable.ic_message)
        .setContentTitle("Alex")
        .setContentText(message.data["text"])
    manager.postNow("item_tag", 51, itemNotif.build())

    // 3. Post a group summary notification
    val summaryNotif = NotificationCompat.Builder(this, "chat_channel")
        .setSmallIcon(R.drawable.ic_message)
        .setContentTitle("New Conversations")
        .setGroupSummary(true)
    manager.postNow("summary_tag", 52, summaryNotif.build())

    // 4. Return finished() to complete the streaming workflow
    return manager.finished()
}

@Override
public NotificationResponse onNotificationReceived(RemoteMessage message) {
    // Retrieve the scoped manager for this message execution
    FcmNotificationManager manager = getFcmNotificationManager(message);

    // 1. Cancel an outdated notification right away
    manager.cancelNow("message_tag", 50);

    // 2. Post the item notification immediately
    NotificationCompat.Builder itemNotif = new NotificationCompat.Builder(this, "chat_channel")
            .setSmallIcon(R.drawable.ic_message)
            .setContentTitle("Alex")
            .setContentText(message.getData().get("text"));
    manager.postNow("item_tag", 51, itemNotif.build());

    // 3. Post a group summary notification
    NotificationCompat.Builder summaryNotif = new NotificationCompat.Builder(this, "chat_channel")
            .setSmallIcon(R.drawable.ic_message)
            .setContentTitle("New Conversations")
            .setGroupSummary(true);
    manager.postNow("summary_tag", 52, summaryNotif.build());

    // 4. Return finished() to complete the streaming workflow
    return manager.finished();
}

override fun onBackgroundSyncReceived(message: RemoteMessage) {
    val syncCommand = message.data["sync_action"]

    try {
        // Perform local database synchronization or cache refresh
        AppDataRepository.getInstance(applicationContext).syncWithServer(syncCommand)
    } catch (e: Exception) {
        Log.e("FCM", "Background sync operation failed", e)
    }
    // Execution completes -> GMS Core marks the message as handled and unbinds.
}

@Override
public void onBackgroundSyncReceived(RemoteMessage message) {
    String syncCommand = message.getData().get("sync_action");

    try {
        // Perform local database synchronization or cache refresh
        AppDataRepository.getInstance(getApplicationContext()).syncWithServer(syncCommand);
    } catch (Exception e) {
        Log.e("FCM", "Background sync operation failed", e);
    }
    // Execution completes -> GMS Core marks the message as handled and unbinds.
}

override fun onDeletedMessages() {
    // Perform a full state synchronization with your app server
    AppDataRepository.getInstance(applicationContext).scheduleFullSync()
}

@Override
public void onDeletedMessages() {
    // Perform a full state synchronization with your app server
    AppDataRepository.getInstance(getApplicationContext()).scheduleFullSync();
}