Inquiry about applying Android notification channel

Hi, how are you?

I am inquiring by applying the notification channel.

When the app is not running, you cannot receive a pop-up message from the server, and there is no sound or vibration. Therefore, you want to apply the notification channel

NotificationCompat.Builder builder = new NotificationCompat.Builder(this, chanelId);

Cannot apply two factors to NotificationCompat.Builder in part <

This or getApplicationContext() does not cause an error, but you cannot receive a pop-up message from the server when the app is not running the same way, and there is no notification sound or vibration.

I think I need to write the ChaneId in NotificationCompat.Builder, but if I write it, there will be an error. The error content is actual and formal argument list different in length.

I ask for your help me <