Get data from pending intent to launch detail window in app

I've been trying to find any examples that create an intent with data (such as an ID) so when it's touched in the notification drawer it opens my app (which works) and then loads the correct screen. I'm attaching an ID using intent.putExtra('the_id', ID);.

I was able to get the id with another way but then when I would press back to go to my map screen I kept getting that "MapView is already created, can only have one MapView at a time" error.

The below code is launching the notification properly and when I open it from the Notification drawer it opens my app but doesn't open the new window.

Notifications.js

// Create intent - Below is the intent I found that launches my app properly from a Notification
    var intent = Ti.Android.createIntent({
        flags: Ti.Android.FLAG_ACTIVITY_CLEAR_TOP | Ti.Android.FLAG_ACTIVITY_SINGLE_TOP,
        className:'com.example.app.appActivity',
        packageName:Ti.App.id
   });
   intent.addCategory(Ti.Android.CATEGORY_LAUNCHER);
   intent.putExtra('detail_id', detail_id);
 
    // Send Android Notification
    Ti.Android.NotificationManager.notify(
    detail_id, // <-- this is an ID that we can use to clear the notification later
    Ti.Android.createNotification({
        defaults: Ti.Android.DEFAULT_ALL,
        icon: Ti.App.Android.R.drawable.my_icon,
        contentTitle: 'Title',
        contentText : 'Text',
        tickerText: 'Some ticker text',
        flags: Ti.Android.FLAG_AUTO_CANCEL,
        contentIntent: Ti.Android.createPendingIntent({
            activity:Ti.Android.currentActivity,
            intent:intent,
            flags:Ti.Android.FLAG_UPDATE_CURRENT,
            type:Ti.Android.PENDING_INTENT_FOR_ACTIVITY
        })
    }));

// Check for Intent
        var currActivity = Ti.Android.currentActivity;
        var intentData = currActivity.getIntent().getStringExtra('detail_id');
        Ti.API.log('INTENT = ' + intentData);
        if(intentData != null){
            // open proper window with intent id pulling in the correct info to build the window
        }

I just need to be able to get the id from the notification, and do something with it in my app (like a listener). I can't find any examples of this really standard notification functionality, so I hope someone might know what I need to change.

Thanks.