我有2个片段FragmentA和FragmentB。FragmentA 位于 FragmentB 之上。现在我想在 FragmentB 上添加选项卡。请帮忙。到目前为止我的代码:-
布局/片段A.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Top Fragment" />
</LinearLayout>
布局/片段B.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#F5F6CE"
android:orientation="vertical" >
<TabHost
android:id="@android:id/tabhost"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</TabWidget>
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<include
android:id="@+id/tabdata1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
layout=“@layout/tabdata1_view"/>
<include
android:id="@+id/tabdata2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
layout=“@layout/tabdata2_view"
/>
</FrameLayout>
</LinearLayout>
</TabHost>
</LinearLayout>
碎片B.java
public class Fragment2 extends Fragment{
TabHost myTabHost;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment2_layout, container, false);
myTabHost = (TabHost) getView().findViewById(R.id.tabhost)
return rootView;
}
}
错误:-
行" myTabHost = (TabHost) getView().findViewById(R.id.tabhost)
"给出错误,因为它找不到选项卡主机。
请提出一种方法来实现此目的。
试试这个
myTabHost = (TabHost) rootview.findViewById(android.R.id.tabhost);
这应该可以消除您现在面临的错误
这是因为在你从onCreateView返回之前,片段实际上还没有视图。你只需要相对于rootView调用findViewById。喜欢这个:
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment2_layout, container, false);
myTabHost = (TabHost) rootView.findViewById(R.id.tabhost)
return rootView;
}