在没有UI的情况下添加其他Fragment后,获取"Fragment没有创建视图"

Question

我有一个非常奇怪的问题.我有一个常见的片段,几乎在我的应用程序的每个活动中都添加了.此片段显示了一个小版本的播放器栏.所以它会收听一些广播以更新当前音乐的名称,并有一些控制,如播放/暂停.

就像我说的,我几乎在我的应用程序的每个活动中都添加了这个片段,我从来没有遇到任何问题.但现在,我需要创建一个没有UI且保留的新片段(setRetainInstance(true)).添加这个新片段后,一切似乎都没问题.直到我旋转设备并且活动崩溃.

所以,查看日志,我看到以下异常:

07-05 14:10:23.818: ERROR/AndroidRuntime(25922): FATAL EXCEPTION: main
        java.lang.RuntimeException: Unable to start activity ComponentInfo{com.soongz/com.soongz.ui.PlaylistActivity}: android.view.InflateException: Binary XML file line #13: Error inflating class fragment
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3576)
        at android.app.ActivityThread.access$800(ActivityThread.java:140)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1243)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:137)
        at android.app.ActivityThread.main(ActivityThread.java:4921)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:511)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
        at dalvik.system.NativeStart.main(Native Method)
        Caused by: android.view.InflateException: Binary XML file line #13: Error inflating class fragment
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
        at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:313)
        at com.actionbarsherlock.internal.ActionBarSherlockNative.setContentView(ActionBarSherlockNative.java:119)
        at com.actionbarsherlock.app.SherlockFragmentActivity.setContentView(SherlockFragmentActivity.java:262)
        at net.simonvt.menudrawer.MenuDrawer.setContentView(MenuDrawer.java:964)
        at com.soongz.ui.BaseComMenuActivity.setContentViewComMenu(BaseComMenuActivity.java:31)
        at com.soongz.ui.PlaylistActivity.createView(PlaylistActivity.java:111)
        at br.com.cybereagle.androidlibrary.ui.EagleActivity.onCreate(EagleActivity.java:57)
        at android.app.Activity.performCreate(Activity.java:5206)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
        ... 12 more
        Caused by: java.lang.IllegalStateException: Fragment com.soongz.ui.fragment.PlayerReduzidoFragment did not create a view.
        at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:303)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
        ... 26 more

此异常发生在已存在于Activity中的Fragment中,而不是发生在新Fragment中.如果我使用小版本的播放器栏删除片段并保留新片段而不使用UI,则一切正常.如果我只保留旧片段并删除新片段,它也可以工作.

更多细节:旧片段通过布局XML添加.这是活动的XML:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">

    <fragment
        android:name="com.soongz.ui.fragment.ListaDeMusicasFragment"
        android:id="@+id/lista_de_musicas_fragment"
        style="?layoutListViewMusicas" />

    <fragment
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:name="com.soongz.ui.fragment.PlayerReduzidoFragment"/>
</LinearLayout>

以下列方式添加新片段(无UI):

FragmentManager fragmentManager = getSupportFragmentManager();
operacoesEmBackgroundFragment = (OperacoesEmBackgroundFragment) fragmentManager.findFragmentByTag(TAG_OPERACOES_EM_BACKGROUND_FRAGMENT);

if(operacoesEmBackgroundFragment == null){
    operacoesEmBackgroundFragment = new OperacoesEmBackgroundFragment();
    fragmentManager.beginTransaction()
            .add(operacoesEmBackgroundFragment, TAG_OPERACOES_EM_BACKGROUND_FRAGMENT)
            .commit();
}

更新:

我从没有UI的片段中删除了setRetainInstance(true),以查看问题是否与此相关.但问题仍然存在.

Answer 1

天啊,我无法相信.我解决了我的问题只是设置有问题的片段的ID.

现在,XML的Activity布局如下:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">

    <fragment
        android:name="com.soongz.ui.fragment.ListaDeMusicasFragment"
        android:id="@+id/lista_de_musicas_fragment"
        style="?layoutListViewMusicas" />

    <fragment
        android:id="@+id/player_reduzido_fragment"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:name="com.soongz.ui.fragment.PlayerReduzidoFragment"/>
</LinearLayout>

我不知道为什么.它一定是个bug.