Android - Override back button to act like home button

On pressing the back button, I'd like my application to go into the stopped state, rather than the destroyed state.
In the Android docs it states:

...not all activities have the behavior that they are destroyed when BACK is pressed. When the user starts playing music in the Music application and then presses BACK, the application overrides the normal back behavior, preventing the player activity from being destroyed, and continues playing music, even though its activity is no longer visible

How do I replicate this functionality in my own application?
I think there must be three possibilities...

1. Capture the back button press (as below) and then call whatever method(s) the home button calls.
   

   @Override public boolean onKeyDown(int keyCode, KeyEvent event) { 
       if ((keyCode == KeyEvent.KEYCODE_BACK)) { 
           Log.d(this.getClass().getName(), "back button pressed"); 
       } 
       return super.onKeyDown(keyCode, event); } 

2. Capture the back button press and then spoof a home button press.
3. Capture the back button press, then start an Activity of the home screen, effectively putting my application's Activity into the stopped state.

I know about services and am using one in the application to which this problem is related. This question is specifically about putting the Activity into the stopped state rather than the destroyed state on pressing the back button.

 

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Android - Combining text and image on Button or ImageButton

I'm trying to have an image (as the background) on a button and add dynamically, depending on what's happening during run-time, some text above/over the image.

If I use ImageButton I don't even have the possibility to add text. If I use Button I can add text but only define an image with android:drawableBottom and similar XML attributes as defined here.

However these attributes only combine text & image in x- and y-dimensions, meaning I can draw an image around my text, but not below/under my text (with the z-axis defined as coming out of the display).

Any suggestions on how to do this? One idea would be to either extend Button or ImageButton and override the draw()-method. But with my current level of knowledge I don't really know how to do this (2D rendering). Maybe someone with more experience knows a solution or at least some pointers to start?

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