Untitled

package com.example.thecocktaildb;

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Build;

import androidx.annotation.NonNull;
import androidx.core.app.NotificationCompat;

import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;

public class MessagingService extends FirebaseMessagingService {
    private static final String CHANNEL_ID = "my_channel_id";
    private static final CharSequence CHANNEL_NAME = "my_channel_name";

    @Override
    public void onMessageReceived(@NonNull RemoteMessage remoteMessage) {
        super.onMessageReceived(remoteMessage);

        if (remoteMessage.getNotification() != null) {
            // hien thi message
            showNotification(
                    remoteMessage.getNotification().getTitle(),
                    remoteMessage.getNotification().getBody()
            );
        }

    }

    public void showNotification(String title, String body) {
        Intent intent = new Intent(this, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(
                this,
                0,
                intent,
                PendingIntent.FLAG_NO_CREATE
        );

        NotificationCompat.Builder builder = new NotificationCompat.Builder(
                getApplicationContext(),
                CHANNEL_ID)
                .setContentIntent(pendingIntent)
                .setContentTitle(title)
                .setContentText(body)
                .setSmallIcon(R.drawable.ic_message)
                .setAutoCancel(true)
                .setOnlyAlertOnce(true);

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

        // >= Android API 26
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel(
                    CHANNEL_ID,
                    CHANNEL_NAME,
                    NotificationManager.IMPORTANCE_HIGH
            );
            manager.createNotificationChannel(channel);
        }
        manager.notify(0, builder.build());
    }
}