2
一个活动中的许多片段的问题已经在这里讨论过了,但我似乎无法找到解决我的定位问题的解决方案。一个活动中的多个片段
我想要一个水平滚动条在屏幕上方,并在它下面定制一个ListFragment。我在下面发布的代码放置滚动条,然后ListFragment覆盖它。当我尝试修改主机FrameLayout有两个FrameLayouts我得到运行时错误。
简单地说,我该如何定位滚动条下的listFragment?
public class GoogleNewsMainActivity extends FragmentActivity{
public static Context c;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
c=this;
setContentView(R.layout.activity_fragment);
/* FragmentManager fm = getSupportFragmentManager();
Fragment fragment = fm.findFragmentById(R.id.fragmentContainer);
if (fragment == null) {
Scroll_Menu_Fragment scrollFragment = new Scroll_Menu_Fragment();
fm.beginTransaction()
.add(R.id.fragmentContainer, scrollFragment)
.commit();
GoogleNewsMainFragment f = new GoogleNewsMainFragment();
fm.beginTransaction()
.add(R.id.fragmentContainer, f)
.commit();
} */
}
}
这里是滚动条片段:
public class Scroll_Menu_Fragment extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
return inflater.inflate(R.layout.scrollbar_fragment, container, false);
}
@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
}
这是ListFragment
public class GoogleNewsMainFragment extends ListFragment implements LoaderCallbacks<Cursor> {
private static final String COLUMN_ID = "id";
public final static String NEWSFROMSERVICE = "NEWSFROMSERVICE";
static ImageView thumbnail;
static String mSectionSelected;
private NewsCursor mCursor;
private ListView lv;
private NewsCursorAdapter adapter;
public static final String ID = "id";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setRetainInstance(true);
setHasOptionsMenu(true);
mSectionSelected = ""; // until they select one
getLoaderManager().initLoader(0, null, this);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_google_news_main, container, false);
getActivity().setTitle(R.string.news_list_title);
return v;
}
最后主办布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/fragmentContainer"
android:baselineAligned="false"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<fragment
android:id="@+id/scrollFragment"
android:layout_width="fill_parent"
android:layout_weight="10"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
class="com.gilchrist.android.googlenews.Scroll_Menu_Fragment" ></fragment>
<fragment
android:id="@+id/listFragment"
android:layout_width="fill_parent"
android:layout_weight="90"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
class="com.gilchrist.android.googlenews.GoogleNewsMainFragment" ></fragment>
</LinearLayout>
我想你应该在xml中添加片段以及更多信息只需看看特定章节中的vogella示例 –
我更改了最初发布的代码并将片段放入活动布局中 - 如有人在上面评论。这个想法是沿着屏幕顶部的滚动视图和由listFragment占据的屏幕的其余部分。和我在运行时试图做到这一点一样的问题。滚动条出现在屏幕的顶部,然后listfragment占据整个屏幕并覆盖滚动条。你如何将这两个片段放在另一个之上? – Glenn