我正在创建有两个选项卡的菜单。每个选项卡都有三个显示内容的片段。我虽然这很简单，但在试验和谷歌搜索之后，看起来我错了。
我设法为第一个选项卡创建了片段。但是，当我切换到其他选项卡并返回时，我收到以下错误消息并且应用程序崩溃：
07-11 16:49:57.829: E/AndroidRuntime(20009): FATAL EXCEPTION: main
07-11 16:49:57.829: E/AndroidRuntime(20009): android.view.InflateException: Binary XML file line #8: Error inflating class fragment
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:697)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.view.LayoutInflater.rInflate(LayoutInflater.java:739)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
07-11 16:49:57.829: E/AndroidRuntime(20009): at com.machinedata.ui.feedback.UsersFragment.onCreateView(UsersFragment.java:16)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:828)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1032)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.app.BackStackRecord.run(BackStackRecord.java:622)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1382)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.app.FragmentManagerImpl$1.run(FragmentManager.java:426)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.os.Handler.handleCallback(Handler.java:605)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.os.Handler.dispatchMessage(Handler.java:92)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.os.Looper.loop(Looper.java:137)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.app.ActivityThread.main(ActivityThread.java:4507)
07-11 16:49:57.829: E/AndroidRuntime(20009): at java.lang.reflect.Method.invokeNative(Native Method)
07-11 16:49:57.829: E/AndroidRuntime(20009): at java.lang.reflect.Method.invoke(Method.java:511)
07-11 16:49:57.829: E/AndroidRuntime(20009): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:978)
07-11 16:49:57.829: E/AndroidRuntime(20009): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)
07-11 16:49:57.829: E/AndroidRuntime(20009): at dalvik.system.NativeStart.main(Native Method)
07-11 16:49:57.829: E/AndroidRuntime(20009): Caused by: java.lang.IllegalArgumentException: Binary XML file line #8: Duplicate id 0x7f0b0013, tag null, or parent id 0xffffffff with another fragment for com.machinedata.ui.UserListFragment
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.app.Activity.onCreateView(Activity.java:4252)
07-11 16:49:57.829: E/AndroidRuntime(20009): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:673)
现在我的选项卡本身就是片段，它们被动态放置到屏幕上。然后这些片段膨胀 xml 文件，其中静态放置了片段。经过一番谷歌搜索后，我发现将片段放在片段中有点棘手。
getChildFragmentManager 在 API 级别 17 中工作，但我想将 API 级别保持在 14 中。无论如何要创建这种菜单结构吗？我需要为标签创建单独的活动吗？
这是我显示选项卡的活动：
public class FeedbackActivity extends Activity implements UserListFragment.OnItemClickedListener
{
private ToplistsFragment toplist;
private UsersFragment users;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
setContentView(R.layout.feedback_screen);
//create tabs for dashboard and graphs
ActionBar.Tab tab1 = actionBar.newTab().setText(R.string.feedbackUsers);
ActionBar.Tab tab2 = actionBar.newTab().setText(R.string.feedbackToplist);
toplist = new ToplistsFragment();
users = new UsersFragment();
tab2.setTabListener(new MyTabsListener(toplist));
tab1.setTabListener(new MyTabsListener(users));
actionBar.addTab(tab1);
actionBar.addTab(tab2);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// TODO Auto-generated method stub
super.onCreateContextMenu(menu, v, menuInfo);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
// TODO Auto-generated method stub
Log.v("log","ID: " + item.getItemId() + " " + item.getTitle());
switch (item.getItemId())
{
case android.R.id.home:
Intent intent = new Intent(this, ModeSelectActivity.class);
startActivity(intent);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onUserItemClick(AdapterView<?> parent, View v, int position, long id, UserData user)
{
//wite your activity code here
Log.v("log", "name: " + user.getName());
}
//tablistener
class MyTabsListener implements ActionBar.TabListener
{
public Fragment fragment;
public MyTabsListener(Fragment fragment)
{
this.fragment = fragment;
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft)
{
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft)
{
ft.replace(R.id.feedback_fragcontainer, fragment);
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft)
{
ft.remove(fragment);
}
}
}
它的 xml 文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/feedback_fragcontainer"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" />
</LinearLayout>
和标签片段的 xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:baselineAligned="false">
<fragment
android:id="@+id/feedbackuserListFragment"
android:layout_width="match_parent"
android:layout_weight="1"
android:layout_height="match_parent"
class="com.machinedata.ui.UserListFragment" >
</fragment>
<fragment
android:id="@+id/feedbackSessionListFragment"
android:layout_width="match_parent"
android:layout_weight="1"
android:layout_height="match_parent"
class="com.machinedata.ui.feedback.SessionListFragment" >
<!-- Preview: layout=@layout/details -->
</fragment>
<fragment
android:id="@+id/feedbackDetailsFragment"
android:layout_width="match_parent"
android:layout_weight="0.5"
android:layout_height="match_parent"
class="com.machinedata.ui.feedback.DetailsFragment" >
<!-- Preview: layout=@layout/details -->
</fragment>
</LinearLayout>
老实说，我不确定重复 id 的错误消息是什么意思，或者是什么原因造成的。基本上我正在寻找一种解决方案来创建我描述的菜单结构或修复我当前的实现的方法。