[android-developers] Mimic Home button in software

I would like the back button to work exactly like the home button in
my activity. I know that doesn't sounds like something I would want to
do, but it makes sense in the context of my app.

I've tried an intent:
Intent intent = new Intent(Intent.ACTION_MAIN, null);
intent.addCategory(Intent.CATEGORY_HOME);
startActivity(intent);
But this doesn't work the same way.
I've tried super.onKeyDown(KeyEvent.KEYCODE_HOME, event); on the
onKeyDown method and it does nothing.

They problem is the keyguard acts different when you push the home
button when you have an unlock pattern set.
There is usually a "Emergency Call" button on the unlock pattern
screen, but there is not when you click the home button and you have
dismissed the keyguard.
I would like the back button to behave the same way.

Would I be able to do this with the instrument class? Is there a
better way to do it?

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