How to Implement Multiple Notifications with Multiple Intents in Android?

Question

How can I implement multiple notifications, each with its own unique intent in an Android application?

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

Intent intent1 = new Intent(this, FirstActivity.class);
PendingIntent pendingIntent1 = PendingIntent.getActivity(this, 0, intent1, PendingIntent.FLAG_UPDATE_CURRENT);

Notification notification1 = new NotificationCompat.Builder(this, CHANNEL_ID)
        .setSmallIcon(R.drawable.ic_notification)
        .setContentTitle("First Notification")
        .setContentText("This is the first notification")
        .setContentIntent(pendingIntent1)
        .setAutoCancel(true)
        .build();

notificationManager.notify(NOTIFICATION_ID_1, notification1);

// Repeat for additional notifications with different intents.

Answer

Creating multiple notifications in Android is straightforward with the NotificationManager, allowing each notification to launch different activities or intents. This can enhance user engagement by providing context-aware notifications. The process involves defining intents for each notification, creating notifications with a unique identifier, and attaching these intents to the respective notifications.

public void sendNotifications() {
    NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    // Notification channel setup for Android 8.0+
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID, "My Notifications", 
                NotificationManager.IMPORTANCE_DEFAULT);
        notificationManager.createNotificationChannel(channel);
    }

    // Creating multiple notifications
    for (int i = 0; i < 3; i++) {
        Intent intent = new Intent(this, TargetActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, i, intent, PendingIntent.FLAG_UPDATE_CURRENT);

        Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
                .setSmallIcon(R.drawable.ic_notification)
                .setContentTitle("Notification " + (i + 1))
                .setContentText("This is notification number " + (i + 1))
                .setContentIntent(pendingIntent)
                .setAutoCancel(true)
                .build();

        notificationManager.notify(i + 1, notification);
    }
}

Causes

User notification needs vary across different parts of the app.
Different actions can be associated with each notification.

Solutions

Set up Notification channels for Android 8.0 and above.
For each notification, create a unique intent and pending intent.
Use unique notification IDs to avoid overwriting notifications.

Common Mistakes

Mistake: Using the same notification ID for multiple notifications, leading to overwrites.

Solution: Always use unique IDs for each notification to ensure they remain separate.

Mistake: Not setting up the notification channel for newer Android versions.

Solution: Ensure you create a notification channel for Android 8.0 (API level 26) and above.

Helpers

Android notifications
multiple intents
Android notification tutorial
sent multiple notifications
notification best practices
Android programming