note 09- android setup menu button

in activity (context ) overrider next two function :

@Override
    public boolean onCreateOptionsMenu(Menu menu){
        menu.add(0, 1, 1, R.string.exit);
        menu.add(0, 2, 2, R.string.about);
        return super.onCreateOptionsMenu(menu);
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item){
        
        if(item.getItemId()==1){
            this.finish();
        }
        
        
        return super.onOptionsItemSelected(item);
    }