同时更新两个Android通知

// 创建第一个通知
NotificationCompat.Builder builder1 = new NotificationCompat.Builder(context, channelId)
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("通知1标题")
        .setContentText("通知1内容");

// 创建第二个通知
NotificationCompat.Builder builder2 = new NotificationCompat.Builder(context, channelId)
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("通知2标题")
        .setContentText("通知2内容");

// 更新第一个通知
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(notificationId1, builder1.build());

// 更新第二个通知
notificationManager.notify(notificationId2, builder2.build());