小编ayb*_*uka的帖子

我试图像在示例中一样在片段中添加TabHost,在调用时获取NullPointerException

mTabHost.setup()

可能是什么问题？代码如下

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

    View rootView = inflater.inflate(R.layout.tabs_layout,container,false);

    mTabHost = (FragmentTabHost)rootView.findViewById(android.R.id.tabhost);
    mTabHost.setup(getActivity(), getChildFragmentManager(), R.id.tabcontent);

    mTabHost.addTab(mTabHost.newTabSpec("fragmentb").setIndicator("tab1"),
            Fragment1.class, null);
    mTabHost.addTab(mTabHost.newTabSpec("fragmentc").setIndicator("tab2"),
            Fragment2.class, null);
    return rootView;
}

XML:

<android.support.v4.app.FragmentTabHost
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/tabhost"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <FrameLayout
            android:id="@+id/tabcontent"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            />

    </LinearLayout>
</android.support.v4.app.FragmentTabHost>