android-fragments - FragmentActivity：无法解析 setContentView

Question

我遇到以下活动的问题

public class MainActivity extends FragmentActivity implements UpdateActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tabbed_main_activity); <-- error here

我收到以下错误：Cannot resolve method setContentView(int)

我究竟做错了什么？

PS：我还与http://developer.android.com/training/basics/fragments/fragment-ui.html进行了交叉检查