I am glad to post it! After working all night I found something. So, here we go!
1. Create an xml layout file for your notification.
2. Create the notification using the Notification.Builder. After adding everything you want (icons, sounds, etc) do this:
//R.layout.notification_layout is from step 1
RemoteViews contentView=new RemoteViews(ctx.getPackageName(), R.layout.notification_layout);
setListeners(contentView);//look at step 3
notification.contentView = contentView;
3. Create a method setListeners. Inside this method you have to write this:
//HelperActivity will be shown at step 4
Intent radio=new Intent(ctx, packagename.youractivity.class);
radio.putExtra("AN_ACTION", "do");//if necessary
PendingIntent pRadio = PendingIntent.getActivity(ctx, 0, radio, 0);
//R.id.radio is a button from the layout which is created at step 2 view.setOnClickPendingIntent(R.id.radio, pRadio);
//Follows exactly my code!
Intent volume=new Intent(ctx, tsapalos11598712.bill3050.shortcuts.helper.HelperActivity.class);
volume.putExtra("DO", "volume");</p>
//HERE is the whole trick. Look at pVolume. I used 1 instead of 0.
PendingIntent pVolume = PendingIntent.getActivity(ctx, 1, volume, 0);
view.setOnClickPendingIntent(R.id.volume, pVolume);
4. For my requirements I used a HelperActivity which responds to the intents. But for you I don’t think it is necessary.
If you want the full source code you can browse it or download it from my git repo. The code is for personal use, so don’t expect to read a gorgeous code with a lot of comments. https://github.com/BILLyTheLiTTle/AndroidProject_Shortcuts
ALL THE ABOVE, ANSWERS THE QUESTION OF CATCHING EVENT FROM DIFFERENT BUTTONS.
About canceling the notification I redirect you here
How to clear a notification in Android
Just remember to use the id you parsed at the notify method when you called the notification for fist time