Question

我正在创建包含两个标签的菜单。每个选项卡都有三个显示内容的片段。我虽然这很简单，但经过实验和谷歌搜索，看起来我错了。

我设法为第一个标签创建片段。但是，当我更改到其他选项卡并返回时，我收到以下错误消息和应用程序崩溃：

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)

现在我的标签是片段本身，它们动态地放置在屏幕上。这些片段然后膨胀xml文件，这些文件静态地放置在它们中。经过一些谷歌搜索后，我发现将片段放入片段中有点棘手。

getChildFragmentManager在API级别17中工作，但我希望将API级别保持在14级。无论如何都要创建这种菜单结构吗？我是否需要为标签创建单独的活动？

这是我的活动，显示标签：

    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);
        }

    }
}

其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>

tab-fragment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>

说实话，我不确定错误消息对重复ID的意义，或导致它的原因。基本上我正在寻找一个解决方案来创建我描述的菜单结构或修复我当前实现的方法。

Answer 1

嵌套片段功能（在API级别17上实现）也在支持包中提供。从android.support.v4.app.Fragment而不是android.app.Fragment扩展您的片段。并将您的父级活动替换为android.support.v4.app.FragmentActivity。

标签内的碎片

1 个答案: