Programatically detect presence of hardware call/hang up keys

One of my clients wants a code method that returns a boolean. True if the Android phone has hardware red/green call/hang up keys and false if it does not.

Sonething like this :

public void keyFeedbackFromInput(KeyEvent event) {
  if (event.getAction() == KeyEvent.ACTION_DOWN 
        && (event.getFlags() & KeyEvent.FLAG_VIRTUAL_HARD_KEY) != 0) {
    // perform your logic here
  }
}

But not in a key press event as in the code snippet above. He 开发者_如何学Pythonneeds to determine this up front if a phone has physical red/green keys or virtual ones.

Is it possible and if yes can someone provide a code sample to achieve this?

EDITED:

There is no call to get that kind of info. You can try having a dictionary with Build.MODEL as key. Something like:

/* Create the dictionary */
private HashMap<String, Boolean> redGreenKeys = new HashMap<String, Boolean>();
redGreenKeys.put("Milestone", false);


public Boolean hasRedGreenButtons() {
    Boolean ret = redGreenKeys.get(Build.MODEL);
    if ( ret == null )
        return false;

    return ret;
}