i found a solution for my problem, maybe this can help other programmers too.
first of all, I hide the SystemBar with this Answer:
Is there a way to hide the system bar in Android 3.0? It's an internal device and I'm managing navigation
Then i create my own home button Service with allways show a home icon on the left side of the top. The Service got a onTouchEvent, looks like this
public boolean onTouchEvent(MotionEvent event) {
if(event.getRawY() < 50 && event.getRawX() < 50)
{
Context context = getContext();
Intent startMain = new Intent(Intent.ACTION_MAIN);
startMain.addCategory(Intent.CATEGORY_HOME);
startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(startMain);
}
return true;
}
i hope this can help people out, if not ask me a question :-) i will try to help you