In a live card, you can call:
finish();
to return to the home screen (OK Glass).
I tested this on XE16 and it worked.
Here is some more detailed code from my Activity:
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_DPAD_CENTER:
{
//return to OK Glass screen
finish();
return true;
}
}
return super.onKeyDown(keyCode, event);
}
If you provide some code to make your question more specific I can provide more specific guidance.