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错误膨胀类的片段InflateException二进制XML文件

分类: 技术问答 • 2022-07-05 17:34:30
问题描述：

我正在设计我的第一个应用程序使用材料设计和NavigationDrawer布局等，我遇到了一个问题。该应用程序非常简单（只显示文本），并且基于Android Studio中提供的模板。错误膨胀类的片段InflateException二进制XML文件

当尝试启动我的应用程序得到以下logcat的错误：

Java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.test/com.example.test.MainActivity}: android.view.InflateException: Binary XML file line #22: Error inflating class fragment 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
     at android.app.ActivityThread.access$800(ActivityThread.java:144) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:135) 
     at android.app.ActivityThread.main(ActivityThread.java:5221) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at java.lang.reflect.Method.invoke(Method.java:372) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
Caused by: android.view.InflateException: Binary XML file line #22: Error inflating class fragment 
     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:763) 
     at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:504) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
     at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
     at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228) 
     at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102) 
     at com.example.test.MainActivity.onCreate(MainActivity.java:92) 
     at android.app.Activity.performCreate(Activity.java:5933) 
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) 
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
            at android.app.ActivityThread.access$800(ActivityThread.java:144) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
            at android.os.Handler.dispatchMessage(Handler.java:102) 
            at android.os.Looper.loop(Looper.java:135) 
            at android.app.ActivityThread.main(ActivityThread.java:5221) 
            at java.lang.reflect.Method.invoke(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:372) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.support.v7.app.ActionBar.getThemedContext()' on a null object reference 
     at com.example.test.NavigationDrawerFragment.onCreateView(NavigationDrawerFragment.java:100) 
     at android.support.v4.app.Fragment.performCreateView(Fragment.java:1786) 
     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:920) 
     at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104) 
     at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1206) 
     at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2159) 
     at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:297) 
     at android.support.v7.app.ActionBarActivity.onCreateView(ActionBarActivity.java:547) 
     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727) 
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
            at android.view.LayoutInflater.inflate(LayoutInflater.java:504) 
            at android.view.LayoutInflater.inflate(LayoutInflater.java:414) 
            at android.view.LayoutInflater.inflate(LayoutInflater.java:365) 
            at android.support.v7.app.ActionBarActivityDelegateBase.setContentView(ActionBarActivityDelegateBase.java:228) 
            at android.support.v7.app.ActionBarActivity.setContentView(ActionBarActivity.java:102) 
            at com.example.test.MainActivity.onCreate(MainActivity.java:92) 
            at android.app.Activity.performCreate(Activity.java:5933) 
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105) 
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251) 
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
            at android.app.ActivityThread.access$800(ActivityThread.java:144) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278) 
            at android.os.Handler.dispatchMessage(Handler.java:102) 
            at android.os.Looper.loop(Looper.java:135) 
            at android.app.ActivityThread.main(ActivityThread.java:5221) 
            at java.lang.reflect.Method.invoke(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:372) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)

我的主要活动如下：

protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     mNavigationDrawerFragment = (NavigationDrawerFragment) 
       getSupportFragmentManager().findFragmentById(R.id.navigation_drawer); 
     mTitle = getTitle(); 

     // Set up the drawer. 
     mNavigationDrawerFragment.setUp(
       R.id.navigation_drawer, 
       (DrawerLayout) findViewById(R.id.drawer_layout)); 
} 

public static class PlaceholderFragment extends Fragment { 
     /** 
     * The fragment argument representing the section number for this 
     * fragment. 
     */ 
     private static final String ARG_SECTION_NUMBER = "section_number"; 

     /** 
     * Returns a new instance of this fragment for the given section 
     * number. 
     */ 
     public static PlaceholderFragment newInstance(int sectionNumber) { 
      PlaceholderFragment fragment = new PlaceholderFragment(); 
      Bundle args = new Bundle(); 
      args.putInt(ARG_SECTION_NUMBER, sectionNumber); 
      fragment.setArguments(args); 
      return fragment; 
     } 

     public PlaceholderFragment() { 
     } 

     @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, 
           Bundle savedInstanceState) { 
      super.onCreateView(inflater, container, savedInstanceState); 
      View rootView = inflater.inflate(R.layout.fragment_main, container, false); 
      return rootView; 
     } 

     @Override 
     public void onAttach(Activity activity) { 
      super.onAttach(activity); 
      ((MainActivity) activity).onSectionAttached(
        getArguments().getInt(ARG_SECTION_NUMBER)); 
     } 
    }

NavigationDrawerFragment的onCreateView：

public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    mDrawerListView = (ListView) inflater.inflate(
      R.layout.fragment_navigation_drawer, container, false); 
    mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
      selectItem(position); 
     } 
    }); 
    mDrawerListView.setAdapter(new ArrayAdapter<String>(
      getActionBar().getThemedContext(), 
      android.R.layout.simple_list_item_activated_1, 
      android.R.id.text1, 
      new String[]{ 
        getString(R.string.title_section1), 
        getString(R.string.title_section2), 
        getString(R.string.title_section3), 
      })); 
    mDrawerListView.setItemChecked(mCurrentSelectedPosition, true); 
    return mDrawerListView; 
}

activity_main.xml：

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:id="@+id/drawer_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context=".MainActivity"> 
    <FrameLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/container" /> 
    <fragment android:id="@+id/navigation_drawer" 
     android:layout_width="@dimen/navigation_drawer_width" android:layout_height="match_parent" 
     android:layout_gravity="start" android:name="com.example.test.NavigationDrawerFragment" 
     tools:layout="@layout/fragment_navigation_drawer" /> 
</android.support.v4.widget.DrawerLayout>

fragment_navigation_drawer.xml：

<ListView 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:choiceMode="singleChoice" 
    android:divider="@android:color/transparent" android:dividerHeight="0dp" 
    android:background="#cccc" tools:context=".NavigationDrawerFragment" />

fragment_main.xml：

<RelativeLayout 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:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    tools:context=".MainActivity$PlaceholderFragment"> 

    <TextView android:id="@+id/section_label" android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:elevation="5dp"/> 

    <TextView 
     android:id="@+id/status_display" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_gravity="bottom" 
     android:elevation="5dp"> 
    </TextView> 

</RelativeLayout>

如果您需要任何更多的代码，请不要犹豫，问。谢谢！

答

在您的fragment_navigation_drawer.xml中给出您的Listview和您的onCreateView的NavigationDrawerFragment.java文件的ID。

View myParentView = inflater.inflate(
     R.layout.fragment_navigation_drawer, container, false); 
mDrawerListView = (ListView) myParentView.findViewById(R.id.listview); 
// the listview is the id you gave to you listview in xml

更改此：

mDrawerListView.setAdapter(new ArrayAdapter<String>(
      getActionBar().getThemedContext()

要：

mDrawerListView.setAdapter(new ArrayAdapter<String>(
      getActivity(),

现在你可以继续（这是预防措施代码）。

答

我有同样的问题：

我的解决办法是在onCreate()selectItem(mCurrentSelectedPosition);之前添加mDrawerLayout=null;。

答

我有同样的问题，事实证明我让我的应用程序全屏，没有行动栏。

我通过将我的主题更改为具有操作栏的主题来解决了该问题。

答

以上都不适合我。实际上，删除 android:theme="...."从application xml标记AndroidManifest.xml文件或添加一个主题，支持ActionBar。希望这有助于拯救某人我曾经的斗争。

当我使用API​​ 25在Android Studio 2.3.3中创建导航抽屉活动时发生此问题。

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