希望这不是一个愚蠢的问题，答案就在我的眼皮底下，因为我一直在花费很长时间尝试不同的方法来解决它，而现在已经太晚了，我要放弃这个问题并最终抓住一些睡觉。
我正在构建一个示例应用程序来解决 UI 中的问题，以便稍后将其添加到实际应用程序中。该应用程序将是带有列表片段的选项卡，并且在列表选择中它将打开一个带有文本或图片的新片段。
一切都在纵向上工作得很好，但是当我尝试从任何选项卡或片段进入横向时，我总是遇到崩溃。我责怪标签，当它只是一个列表时，方向交换效果很好，然后我添加了标签，这个错误开始出现。
我显示片段的方式是替换 xml 中的片段，正如我所说的那样，在选项卡出现之前它工作正常。方向开关提示需要横向 xml，我猜问题是当方向改变时选项卡没有正确重新加载新布局。我仍然是超级新手，所以我知道使用 onSaveInstanceState 但我不确定如何正确进行，或者解决方案是否不同。
代码来了。
肖像 XML
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/fragment_layout_support"
android:layout_width="match_parent"
android:layout_height="match_parent" >
***id.titles includes the listview, which needs to be replaced in portrait***
<fragment
android:id="@+id/titles"
android:layout_width="match_parent"
android:layout_height="match_parent"
class=".TitlesFragment" />
</FrameLayout>
横向 XML
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:baselineAligned="false"
android:orientation="horizontal"
tools:context=".TitlesFragment" >
***listview on the left***
<fragment
android:id="@+id/titles"
android:name=".TitlesFragment"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" />
***Details frame for fragments to inflate into on the right***
<FrameLayout
android:id="@+id/details"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="3" />
</LinearLayout>
ListFragment 类（两个列表相似）
public class TitlesFragment extends SherlockListFragment implements ActionBar.TabListener {
boolean mDualPane;
int mCurCheckPosition = 0;
private Fragment mFragment;
@Override
public void onActivityCreated(Bundle savedInstanceState){
super.onActivityCreated(savedInstanceState);
setListAdapter (new ArrayAdapter<String> (getActivity(),
android.R.layout.simple_list_item_1, android.R.id.text1, ColorList.COLORS));
/* Checking if landscape or not. id.details is unique to landscape */
View detailsFrame = getActivity().findViewById(R.id.details);
mDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;
if (savedInstanceState != null){
mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
}
if (mDualPane){
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
showDetails(mCurCheckPosition);
}
}
@Override
public void onSaveInstanceState(Bundle outState){
super.onSaveInstanceState(outState);
outState.putInt("curChoice", mCurCheckPosition);
/****** This SaveInstanceState did well at changing the orientation before the tabs were added.
* Is there a way to refresh the tabs on the new layout when the orientation changes? */
}
@Override
public void onListItemClick(ListView l, View v, int position, long id){
showDetails(position);
}
/* If Landscape, replace details. If not, replace titles, which includes the listview */
void showDetails(int position){
SherlockFragment newContent = new SherlockFragment();
FragmentManager fm = getFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
if(mDualPane){
switch(position){
case 0:
newContent = new Blue();
break;
case 1:
newContent = new Red();
break;
case 2:
newContent = new Green();
break;
case 3:
newContent = new Yellow();
break;
case 4:
newContent = new Purple();
break;
} ft.replace(R.id.details, newContent);
} else {
switch(position){
case 0:
newContent = new Blue();
break;
case 1:
newContent = new Red();
break;
case 2:
newContent = new Green();
break;
case 3:
newContent = new Yellow();
break;
case 4:
newContent = new Purple();
break;
}ft.replace(R.id.titles, newContent);
}
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.addToBackStack(null);
ft.commit();
return;
}
/* Tab functionality */
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
mFragment = new TitlesFragment();
ft.replace(R.id.titles, mFragment);
//ft.attach(mFragment);
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
//ft.remove(mFragment);
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
谢谢大家的帮助！我很抱歉在我发布这篇文章后不得不离开，但我会在睡几个小时后回来。