Android Back Button?

Hi Guys

I looked everywhere on the forums but can't seem to find any info on this.

Is there a way for Stencyl to recognise the "Back Button" on an Android being pressed?

Thank you in advance!

Same here

I've tried to make a native extension but with no success.

Inspired by captaincomic's Keyboard Input scene behavior (http://community.stencyl.com/index.php/topic,24713.msg141968.html#msg141968), for me this works:

Create a scene behavior and add it to the first scene.

Import block
------------
import nme.events.Event;
import nme.events.KeyboardEvent;
import nme.Lib;
import nme.ui.Keyboard;

When created block
-------------------

in a code block:

var lastEvent:KeyboardEvent;


Lib.current.stage.addEventListener(KeyboardEvent.KEY_DOWN, function(event) {
   lastEvent = event;
   // trace("Keydown: " + lastEvent.keyCode);
   if (lastEvent.keyCode==27) {
      lastEvent.stopImmediatePropagation();
      lastEvent.stopPropagation();
      // call your function here
      sayToScene("Global Functions Scene", "ControlBackButton", [getCurrentSceneName()]);
   }
});



Lib.current.stage.addEventListener(KeyboardEvent.KEY_UP, function(event) {
   lastEvent = event;
   // trace("Keyup: " + lastEvent.keyCode);
   if (lastEvent.keyCode==27) {
      lastEvent.stopImmediatePropagation();
      lastEvent.stopPropagation();
   }
});

Thanks for sharing. The key to this was stopping propagation, otherwise one could just bind the Escape key to a control. That detects the back button but does not prevent the default operation from happening (sending the app to the background).

I suppose the cleanest thing to do if we had to integrate it would be to add a game setting that let you shut off the default back button behavior and then detect the back button pressing using the regular keyboard detection events.

I've now added said option to the Mobile Settings > Input page.

Checking it will disable the default behavior of quitting the app, letting you use a keyboard control bound to the "Esc" key.

I was actually going to request this as a feature when I saw the code.

When I went to enable it... It does not look as described.  Also, regardless of enabled or not it seems to have broken android output.

I responded in the fixed bugs forum -- im not sure anybody checks that... so im double posting here to ensure somebody see's it.

http://community.stencyl.com/index.php/topic,21520.0.html

also, i cannot clear logs as it says "unable to delete file"

The errors in your log don't have anything to do with this change.

Checked in the missing language pack string.

I'm not sure what's changed.  I've downloaded a win 8 update, reboot.  Saw the change and downloaded it.

I don't have any additional language packs installed for win 8 or stencyl

My comment was actually referring to Stencyl and how I forgot to check in the language entry for the new option. That is why it's showing up as 'missing'. If you redownload, you'll see the text for it now.

Gintonic - do you only need to attach that initial scene behavior to the very first scene and then just bind Keyboard UP to whatever I want the back button to do?

Yes, with sayToScene(...) you can trigger an event. But now this all is built-in. You don't need to overwrite it on our own.

So, how can I trigger the back button to do custom thing I want it to do? (like go back in menus)

see attachment