相关疑难解决方法(0)

以下是在Android 1.6上运行,因此我使用兼容包进行分片.以下TestFragment是静态嵌套类:

public class FragmentTestActivity extends FragmentActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
}

public static class TestFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        TextView result = new TextView(getActivity());
        result.setText("Hello TestFragment");
        return result;
    }
}

}

main.xml文件:

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent">
<fragment class="com.test.FragmentTestActivity$TestFragment"
        android:id="@+id/test"
        android:layout_width="fill_parent" android:layout_height="fill_parent" />
</FrameLayout>

奇怪的是容器参数onCreateView是null.

现在,如果我以编程方式添加片段(只需更改onCreateActivity 的方法),则容器不再为null.为什么？

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Fragment frag = new TestFragment(); …