How to Create Custom Notifications with Listeners

MoreBlock Code: 

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

CharSequence name = "Channel name 1";

String description = "Notification channel";

int importance = NotificationManager.IMPORTANCE_DEFAULT;

NotificationChannel channel = new NotificationChannel("id 1", name, importance);

channel.setDescription(description);

NotificationManager notificationManager = getSystemService(NotificationManager.class);

notificationManager.createNotificationChannel(channel);

}

OnButtonClicked:

RemoteViews contentView = new RemoteViews(getPackageName(), R.layout.cview);

Intent intent = new Intent(MainActivity.this, TwoActivity.class);

intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);

PendingIntent pendingIntent = PendingIntent.getActivity(MainActivity.this, 0, intent, 0);

Intent intent1 = new Intent(MainActivity.this, ThreeActivity.class);

intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);

PendingIntent pendingIntent1 = PendingIntent.getActivity(MainActivity.this, 0, intent1, 0);

Intent intent2 = new Intent(MainActivity.this, FourActivity.class);

intent2.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);

PendingIntent pendingIntent2 = PendingIntent.getActivity(MainActivity.this, 0, intent2, 0);

androidx.core.app.NotificationCompat.Builder builder = new androidx.core.app.NotificationCompat.Builder(MainActivity.this, "id 1")

.setSmallIcon(R.drawable.img)

.setContent(contentView)

.setOngoing(false)

.setPriority(androidx.core.app.NotificationCompat.PRIORITY_DEFAULT)

.setAutoCancel(true);

contentView.setOnClickPendingIntent(R.id.one,pendingIntent);

contentView.setOnClickPendingIntent(R.id.two,pendingIntent1);

contentView.setOnClickPendingIntent(R.id.three,pendingIntent2);

androidx.core.app.NotificationManagerCompat notificationManager = androidx.core.app.NotificationManagerCompat.from(MainActivity.this);

notificationManager.notify(1, builder.build());