Android 第一行代码

日志文件如下：
07-01 13:21:36.265  17086-17086/stuapplication.pla.edu.cn.fragmentbestpractice W/dalvikvm﹕ VFY: unable to find class referenced in signature (Landroid/os/PersistableBundle;)
07-01 13:21:36.265  17086-17086/stuapplication.pla.edu.cn.fragmentbestpractice I/dalvikvm﹕ Could not find method android.support.v7.app.AppCompatActivity.onCreate, referenced from method stuapplication.pla.edu.cn.fragmentbestpractice.NewsContentActivity.onCreate
07-01 13:21:36.265  17086-17086/stuapplication.pla.edu.cn.fragmentbestpractice W/dalvikvm﹕ VFY: unable to resolve virtual method 9140: Landroid/support/v7/app/AppCompatActivity;.onCreate (Landroid/os/Bundle;Landroid/os/PersistableBundle;)V
07-01 13:21:36.265  17086-17086/stuapplication.pla.edu.cn.fragmentbestpractice D/dalvikvm﹕ VFY: replacing opcode 0x6f at 0x0000
　　　　　　　　　　　　　　　　　　　　　

相关代码：

public class NewsTitleFragment extends Fragment implements AdapterView.OnItemClickListener {

.....

@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    News news = (News) newsArrayList.get(position);
    if (isTwoPageModel){
        Log.v("NewsTitleFragment","Sorry, pad screen adapter not complete");
    }else {
        NewsContentActivity .actionStart(getActivity(), news.getTitle(), news.getContent());
    }
}
.....
}

public class NewsContentActivity extends AppCompatActivity {
    public  static  void actionStart(Context context, String title, String content){
        Intent intent = new Intent(context,NewsContentActivity.class);
        intent.putExtra("title", title);
        intent.putExtra("content", content);
        context.startActivity(intent);
        Log.v("NewsContentActivity", "startActivity");
    }
....
}