Basic Notification with Load Intent in Android

package com.compgensoft.notificationtutorial;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.NotificationCompat;
import androidx.core.app.NotificationManagerCompat;

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

public class MainActivity extends AppCompatActivity {
    public static final String CHANNEL_ID = "channel";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // creating the channel
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
            String name = CHANNEL_ID;
            String description = "This is the channel description";
            int importance = NotificationManager.IMPORTANCE_DEFAULT;
            NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
            channel.setDescription(description);
            NotificationManager notificationManager = getSystemService(NotificationManager.class);
            notificationManager.createNotificationChannel(channel);
        }

        // setting on tap notification
        Intent intent = new Intent(this, AlertDetails.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);

        // building the notification
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
                .setSmallIcon(R.drawable.call)
                .setContentTitle("Channel")
                .setContentText("I am a notification!")
                // to set longer style do .setStyle(new NotificationCompat.BigTextStyle().bigText("much longer text that can't fit on one line"))
                .setPriority(NotificationCompat.PRIORITY_DEFAULT)
                .setContentIntent(pendingIntent)
                .setAutoCancel(true);

        // showing the notification
        NotificationManagerCompat notificationManagerCompat = NotificationManagerCompat.from(this);

        int notificationId = 1;
        notificationManagerCompat.notify(notificationId, builder.build());


    }
}