我有一个使用带有选项卡的 ActionBar 的 SherlockFragmentActivity。其中一个选项卡是一个 SherlockFragment,它有一个包含片段的布局文件。首次显示该选项卡时,一切都很好。如果我切换到另一个选项卡,然后返回到该选项卡,我会崩溃:
02-21 10:25:10.077: E/AndroidRuntime(3916): Caused by: java.lang.IllegalArgumentException: Binary XML file line #29: Duplicate id 0x7f06006e, tag null, or parent id 0x0 with another fragment for com.nexapps.myq.fragments.TitleInfo
02-21 10:25:10.077: E/AndroidRuntime(3916): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:275)
02-21 10:25:10.077: E/AndroidRuntime(3916): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
02-21 10:25:10.077: E/AndroidRuntime(3916): ... 21 more
我的主要活动:
public class TitleActivity extends SherlockFragmentActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
...
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
...
Tab tab = actionBar.newTab().setText(R.string.details);
tab.setTabListener(new TabListener<TitleDetailsFragment>(this, "details", TitleDetailsFragment.class));
actionBar.addTab(tab);
}
}
标签监听器:公共类 TabListener 实现 com.actionbarsherlock.app.ActionBar.TabListener { private Fragment mFragment; 私人最终活动 mActivity;私有最终字符串 mTag;私有最终类 mClass;
public TabListener(Activity activity, String tag, Class<T> cls) {
mActivity = activity;
mTag = tag;
mClass = cls;
}
public TabListener(Activity activity, String tag, Class<T> clz, Fragment fragment) {
mActivity = activity;
mTag = tag;
mClass = clz;
mFragment = fragment;
}
public void onTabSelected(Tab tab, FragmentTransaction ft) {
if (mFragment == null) {
mFragment = Fragment.instantiate(mActivity, mClass.getName());
ft.add(android.R.id.content, mFragment, mTag);
} else {
ft.attach(mFragment);
}
TabChangeInterface tci = (TabChangeInterface) mActivity;
if (tci != null) {
tci.tabSelect(mTag);
}
}
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
if (mFragment != null) {
ft.detach(mFragment);
}
}
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
}
我的标签片段:
public class TitleDetailsFragment extends SherlockFragment {
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_title, container, false);
return view;
}
}
R.layout.activity_title:
<fragment
android:id="@+id/info"
android:name="foo.TitleInfo"
...
我可以删除 id (这解决了问题),但这些有助于状态更改。关于如何保留 ID 并解决问题的任何想法?