Android 创建菜单

@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        menu.add(0, 0, 0, "退出");
        menu.add(0, 1, 1, "关于"); 
        return true;
    }
    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        super.onOptionsItemSelected(item);
        switch(item.getItemId())
        {
            case 0:
                finish();
                return true;
            case 1:
                startActivity(new Intent(this, about.class));
                return true;
        }
        
        return false;
    }