我创建了一个非常简单的片段来测试我的应用程序，我得到了以下错误消息：

I created a very simple fragment to test my app and I got the following error message:

03-31 16:04:39.834: E/AndroidRuntime(7860): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.team3.domore/com.team3.domore.TabActivity}: java.lang.ClassCastException: com.team3.domore.SomeFrag cannot be cast to android.support.v4.app.Fragment

我的片段是非常简单的...

My fragment is really simple...

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class SomeFrag extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        return inflater.inflate(R.layout.alarm_frag, container, false);
    }

    @Override
    public void onStart() {
        super.onStart();
    }
}

请帮忙......我一直在努力奋斗着这个了近两个小时。

Please help...I've been struggling with this for almost two hours..

编辑：我是pretty的肯定，我称这个片段（扩展FragmentActivity一个活动）是工作......眼前这个片断部分是不工作...

I'm pretty sure where I called this fragment (an activity that extends FragmentActivity) is working... just this fragment part is not working...

推荐答案

您 SomeFrag 扩展

android.app.Fragment

如在进口说明。更改导入到

as stated in the imports. Change the import to

android.support.v4.app.Fragment

和中投将获得成功。