android menu事件

@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) {
        switch (item.getItemId()) {
            case 1:
                finish();
                break;
            case 2:
                break;
        }

        return super.onOptionsItemSelected(item);
    }