Not opening specific activity on notification click when the app is in background/not running

As per Firebase Cloud Messaging documentation-If Activity is in foreground then onMessageReceived will get called. If Activity is in background or closed then notification message is shown in the notification center for app launcher activity. For More information Check this link

Notification messages delivered when your app is in the background. In this case, the notification is delivered to the device’s system tray. A user tap on a notification opens the app launcher by default.

Messages with both notification and data payload, when received in the background. In this case, the notification is delivered to the device’s system tray, and the data payload is delivered in the extras of the intent of your launcher Activity.

if (getIntent().getExtras() != null) {
for (String key : getIntent().getExtras().keySet()){
    String value = getIntent().getExtras().getString(key);
    Log.d(TAG, "Key: " + key + " Value: " + value);
}}

use this code to get intent datas