我是Android开发的新手.

我在布局中有一个TextView,当我尝试在Fragment类中访问TextView时,抛出NullPointerException.我正在按如下方式访问TextView …

TextView textView = (TextView) view.findViewById(R.id.quotes);

我究竟做错了什么？

我已经在SO上查看了有关此问题的其他答案,但没有找到解决方案…

相关代码

quotes_details_fragment.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <TextView
        android:id="@+id/quotes"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/quotes_details"
        android:textSize="24sp" />

</RelativeLayout>

QuotesFragment.java

public class QuotesFragment extends Fragment {

    public QuotesFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View view =  inflater.inflate(R.layout.quotes_details_fragment, container, false);
        TextView textView = (TextView) view.findViewById(R.id.quotes); // NullPointerException
        return view;
    }

}

(主要活动类仅使用FragmentTransaction调用相关片段)

谢谢你的帮助.

解决方法:

在您的onCreateView(..)中添加此LayoutInflater；

 LayoutInflater lf = getActivity().getLayoutInflater();   

像这样：

 @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // Inflate the layout for this fragment

        LayoutInflater lf = getActivity().getLayoutInflater();   

        View view =  lf.inflate(R.layout.quotes_details_fragment, container, false);
        TextView textView = (TextView) view.findViewById(R.id.quotes); // 
        return view;
    }