我想保留这些方法：
setListShown(true);
setListShownNoAnimation(true);
但如果我使用
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
使用自定义样式布局来扩充Fragment，以前的方法无法使用，并显示此异常：
07-30 20:17:46.937: E/AndroidRuntime(1374): Caused by: java.lang.IllegalStateException: Can't be used with a custom content view
07-30 20:17:46.937: E/AndroidRuntime(1374): at android.support.v4.app.ListFragment.setListShown(ListFragment.java:282)
07-30 20:17:46.937: E/AndroidRuntime(1374): at android.support.v4.app.ListFragment.setListShown(ListFragment.java:258)
那么，可能的解决方案是什么？
编辑：
Fragment使用加载程序从数据库填充其ListView。所以这就是我想保留这些方法的原因，这里需要它们：
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
mAdapter.swapCursor(data);
if (isResumed()) {
setListShown(true);
} else {
setListShownNoAnimation(true);
}
}
最简单的解决方案是基于ListFragment源创建自己的代码，并将进度窗口小部件添加到布局以显示相同的效果。到现在为止，我会删除这些行，因为我被告知。如果我进行修改，我会将其粘贴在这里。
答案 0 :(得分：17)
只需将原始ListView替换为CustomListView中的onCreateView()版面。为我工作。
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View layout = super.onCreateView(inflater, container,
savedInstanceState);
ListView lv = (ListView) layout.findViewById(android.R.id.list);
ViewGroup parent = (ViewGroup) lv.getParent();
// Remove ListView and add CustomView in its place
int lvIndex = parent.indexOfChild(lv);
parent.removeViewAt(lvIndex);
LinearLayout mLinearLayout = (LinearLayout) inflater.inflate(
R.layout.custom_list, container, false);
parent.addView(mLinearLayout, lvIndex, lv.getLayoutParams());
return layout;
}
答案 1 :(得分：8)
我尝试过这个解决方案并且有效：
在support ListFragment源代码中说，
如果您使用自己的自定义内容覆盖此方法， 考虑在布局中包含标准布局android.R.layout 文件，以便您继续保留所有标准行为 ListFragment。特别是，这是目前唯一的方法 显示内置的不确定进展状态。
所以，我已经采用了list_content.xml并将其应用于我自己的样式：
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
style="@style/page_background">
<LinearLayout android:id="@+id/progressContainer"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"
android:gravity="center">
<ProgressBar style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:paddingTop="4dip"
android:singleLine="true" />
</LinearLayout>
<FrameLayout android:id="@+id/listContainer"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:drawSelectorOnTop="false"
style="@style/rc_listview"/>
<TextView android:id="@android:id/empty"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge" />
</FrameLayout>
</FrameLayout>
然后从支持源代码复制了一个固定的ListFragment。
删除其onCreateView()。
public class FixedListFragment extends Fragment {
final private Handler mHandler = new Handler();
final private Runnable mRequestFocus = new Runnable() {
public void run() {
mList.focusableViewAvailable(mList);
}
};
final private AdapterView.OnItemClickListener mOnClickListener
= new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
onListItemClick((ListView)parent, v, position, id);
}
};
ListAdapter mAdapter;
ListView mList;
View mEmptyView;
TextView mStandardEmptyView;
View mProgressContainer;
View mListContainer;
CharSequence mEmptyText;
boolean mListShown;
public FixedListFragment() {
}
/**
* Provide default implementation to return a simple list view. Subclasses
* can override to replace with their own layout. If doing so, the
* returned view hierarchy <em>must</em> have a ListView whose id
* is {@link android.R.id#list android.R.id.list} and can optionally
* have a sibling view id {@link android.R.id#empty android.R.id.empty}
* that is to be shown when the list is empty.
*
* <p>If you are overriding this method with your own custom content,
* consider including the standard layout {@link android.R.layout#list_content}
* in your layout file, so that you continue to retain all of the standard
* behavior of ListFragment. In particular, this is currently the only
* way to have the built-in indeterminant progress state be shown.
*/
/**
* Attach to list view once the view hierarchy has been created.
*/
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
ensureList();
}
/**
* Detach from list view.
*/
public void onDestroyView() {
mHandler.removeCallbacks(mRequestFocus);
mList = null;
mListShown = false;
mEmptyView = mProgressContainer = mListContainer = null;
mStandardEmptyView = null;
super.onDestroyView();
}
/**
* This method will be called when an item in the list is selected.
* Subclasses should override. Subclasses can call
* getListView().getItemAtPosition(position) if they need to access the
* data associated with the selected item.
*
* @param l The ListView where the click happened
* @param v The view that was clicked within the ListView
* @param position The position of the view in the list
* @param id The row id of the item that was clicked
*/
public void onListItemClick(ListView l, View v, int position, long id) {
}
/**
* Provide the cursor for the list view.
*/
public void setListAdapter(ListAdapter adapter) {
boolean hadAdapter = mAdapter != null;
mAdapter = adapter;
if (mList != null) {
mList.setAdapter(adapter);
if (!mListShown && !hadAdapter) {
// The list was hidden, and previously didn't have an
// adapter. It is now time to show it.
setListShown(true, getView().getWindowToken() != null);
}
}
}
/**
* Set the currently selected list item to the specified
* position with the adapter's data
*
* @param position
*/
public void setSelection(int position) {
ensureList();
mList.setSelection(position);
}
/**
* Get the position of the currently selected list item.
*/
public int getSelectedItemPosition() {
ensureList();
return mList.getSelectedItemPosition();
}
/**
* Get the cursor row ID of the currently selected list item.
*/
public long getSelectedItemId() {
ensureList();
return mList.getSelectedItemId();
}
/**
* Get the activity's list view widget.
*/
public ListView getListView() {
ensureList();
return mList;
}
/**
* The default content for a ListFragment has a TextView that can
* be shown when the list is empty. If you would like to have it
* shown, call this method to supply the text it should use.
*/
public void setEmptyText(CharSequence text) {
ensureList();
if (mStandardEmptyView == null) {
throw new IllegalStateException("Can't be used with a custom content view");
}
mStandardEmptyView.setText(text);
if (mEmptyText == null) {
mList.setEmptyView(mStandardEmptyView);
}
mEmptyText = text;
}
/**
* Control whether the list is being displayed. You can make it not
* displayed if you are waiting for the initial data to show in it. During
* this time an indeterminant progress indicator will be shown instead.
*
* <p>Applications do not normally need to use this themselves. The default
* behavior of ListFragment is to start with the list not being shown, only
* showing it once an adapter is given with {@link #setListAdapter(ListAdapter)}.
* If the list at that point had not been shown, when it does get shown
* it will be do without the user ever seeing the hidden state.
*
* @param shown If true, the list view is shown; if false, the progress
* indicator. The initial value is true.
*/
public void setListShown(boolean shown) {
setListShown(shown, true);
}
/**
* Like {@link #setListShown(boolean)}, but no animation is used when
* transitioning from the previous state.
*/
public void setListShownNoAnimation(boolean shown) {
setListShown(shown, false);
}
/**
* Control whether the list is being displayed. You can make it not
* displayed if you are waiting for the initial data to show in it. During
* this time an indeterminant progress indicator will be shown instead.
*
* @param shown If true, the list view is shown; if false, the progress
* indicator. The initial value is true.
* @param animate If true, an animation will be used to transition to the
* new state.
*/
private void setListShown(boolean shown, boolean animate) {
ensureList();
if (mProgressContainer == null) {
throw new IllegalStateException("Can't be used with a custom content view");
}
if (mListShown == shown) {
return;
}
mListShown = shown;
if (shown) {
if (animate) {
mProgressContainer.startAnimation(AnimationUtils.loadAnimation(
getActivity(), android.R.anim.fade_out));
mListContainer.startAnimation(AnimationUtils.loadAnimation(
getActivity(), android.R.anim.fade_in));
} else {
mProgressContainer.clearAnimation();
mListContainer.clearAnimation();
}
mProgressContainer.setVisibility(View.GONE);
mListContainer.setVisibility(View.VISIBLE);
} else {
if (animate) {
mProgressContainer.startAnimation(AnimationUtils.loadAnimation(
getActivity(), android.R.anim.fade_in));
mListContainer.startAnimation(AnimationUtils.loadAnimation(
getActivity(), android.R.anim.fade_out));
} else {
mProgressContainer.clearAnimation();
mListContainer.clearAnimation();
}
mProgressContainer.setVisibility(View.VISIBLE);
mListContainer.setVisibility(View.GONE);
}
}
/**
* Get the ListAdapter associated with this activity's ListView.
*/
public ListAdapter getListAdapter() {
return mAdapter;
}
private void ensureList() {
if (mList != null) {
return;
}
View root = getView();
if (root == null) {
throw new IllegalStateException("Content view not yet created");
}
if (root instanceof ListView) {
mList = (ListView)root;
} else {
mStandardEmptyView = (TextView)root.findViewById(android.R.id.empty);
if (mStandardEmptyView == null) {
mEmptyView = root.findViewById(android.R.id.empty);
} else {
mStandardEmptyView.setVisibility(View.GONE);
}
mProgressContainer = root.findViewById(R.id.progressContainer);
mListContainer = root.findViewById(R.id.listContainer);
View rawListView = root.findViewById(android.R.id.list);
if (!(rawListView instanceof ListView)) {
if (rawListView == null) {
throw new RuntimeException(
"Your content must have a ListView whose id attribute is " +
"'android.R.id.list'");
}
throw new RuntimeException(
"Content has view with id attribute 'android.R.id.list' "
+ "that is not a ListView class");
}
mList = (ListView)rawListView;
if (mEmptyView != null) {
mList.setEmptyView(mEmptyView);
} else if (mEmptyText != null) {
mStandardEmptyView.setText(mEmptyText);
mList.setEmptyView(mStandardEmptyView);
}
}
mListShown = true;
mList.setOnItemClickListener(mOnClickListener);
if (mAdapter != null) {
ListAdapter adapter = mAdapter;
mAdapter = null;
setListAdapter(adapter);
} else {
// We are starting without an adapter, so assume we won't
// have our data right away and start with the progress indicator.
if (mProgressContainer != null) {
setListShown(false, false);
}
}
mHandler.post(mRequestFocus);
}
}
在那之后，一切都变得完美。
在创建Fragment时，只需对此list_content.xml进行充气。
public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.list_content, container, false);
return view;
}
答案 2 :(得分：0)
另一个对我有用的解决方案就是放这行
<include layout="@android:layout/list_content" />
而不是ListView。
您可以在其上构建自己的内容或使用其他一些视图将其包围。例如，以下是我的布局：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="@dimen/default_view_padding"
android:gravity="center"
android:weightSum="4">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/btnCounterBack"
android:src="?attr/ic_previous"
android:background="?android:attr/selectableItemBackground"
android:contentDescription="@null"/>
<TextView
android:id="@+id/tvCounterLevel"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/counter_categories"
android:layout_gravity="center"
android:paddingTop="@dimen/default_view_padding"
android:paddingBottom="@dimen/default_view_padding"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:gravity="center"/>
</RelativeLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:gravity="center_vertical"
android:background="?attr/dropShadowBackground"
android:orientation="vertical" >
<include layout="@android:layout/list_content" />
</LinearLayout>
答案 3 :(得分：-1)
setListShown(true);和setListShownNoAnimation(true);，仅适用于Api Level 11+。您要么放弃支持＆lt; = Api等级10（选择不当），要么删除线。
如果我正确理解documentation您无需设置它们，因为true是默认值