toddler safe app on android

Question

I have an app, that should be toddler safe. Meaning that, it blocks any single key touch, yet handles long pressing for exiting the app. This is so that, the toddler will be

Answer 1

For me below code is hiding the home button in ICS (version 4.4.4)

public void onCreate(Bundle savedInstanceState) {
    this.getWindow().setType(WindowManager.LayoutParams.TYPE_APPLICATION);
            super.onAttachedToWindow();
            super.onCreate(savedInstanceState);
            setContentView(R.layout.main);

    }