I doubt you will get this to work correctly, because you are doing this
after parts of the framework that deal with things like going in and out of
touch mode have seen the events.
Why are you doing this? If a device doesn't have a DPAD, the user isn't
going to think to use the volume keys to navigate focus(!!). You should be
giving them a good touch-based UI.
On Fri, Dec 17, 2010 at 12:38 AM, blindfold wrote:
> For Android phones that lack a physical d-pad or trackball (e.g.
> Alcatel OT-980, Motorola Droid Pro), I am trying to remap the physical
> up and down volume keys to simulated up and down d-pad keys using code
> like
>
> @Override
> public boolean onKeyDown(int keyCode, KeyEvent event) {
> if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
> KeyEvent ke = new KeyEvent(KeyEvent.ACTION_DOWN,
> KeyEvent.KEYCODE_DPAD_UP);
> dispatchKeyEvent(ke);
> return true;
> }
> return super.onKeyDown(keyCode, event);
> }
>
> Although this works fine with a ListView and with activity views that
> become scrollable because they are too large to fit on the physical
> screen, it somehow does not work at all for activity views that remain
> small enough to fit on the screen. I can test this by increasing the
> number of radio buttons in some activity view and then see how the
> above key remapping begins to work fine as soon as there are more
> controls than fit on the screen. I have tried all sorts of things with
> setting focus after making things focusable using setFocusable(true),
> setFocusableInTouchMode(true), requestFocus(), requestFocusFromTouch()
> and so on, but nothing seems to help. The above onKeyDown() executes
> in all relevant cases as shown by my Log.i() output, but it is the
> dispatchKeyEvent() that in the described cases does nothing. All my
> activity views are surrounded by in the XML
> of their respective layouts. More about the context of this problem at
>
> http://groups.google.com/group/eyes-free-dev/browse_thread/thread/3747abb6f0b9df11
> (eyes-free-dev list).
>
> So the above code works "sometimes", but I need a reliable/general
> solution. How can one reliably remap physical keys to perform key
> functions for which there are no physical keys on the Android device?
>
> Thanks!
>
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--
Dianne Hackborn
Android framework engineer
hack...@android.com
Note: please don't send private questions to me, as I don't have time to
provide private support, and so won't reply to such e-mails. All such
questions should be posted on public forums, where I and others can see and
answer them.
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