InflateException beim Erstellen der Navigationsschublade

Question

Ich habe eine Android-Anwendung mit erstellt. Ich wollte eine Aktivität mit Navigationsleiste hinzufügen. So benutzte ich, Navigation Drawer Activity in Android Studio.

Dann habe ich versucht, es zu starten eine andere Tätigkeit .Mögen dies unter Verwendung

Intent intent = new Intent(this, AddInfoActivity.class); 
startActivity(intent); 

Dann bekam ich Fehlermeldung folgt.

FATAL EXCEPTION: main 
Process: xxx.com.au.abcd, PID: 13408 
java.lang.RuntimeException: Unable to start activity ComponentInfo{xxx.com.au.abcd/xxx.com.au.abcd.activities.AddInfoActivity}: android.view.InflateException: Binary XML file line #18: Error inflating class fragment 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2436) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2498) 
    at android.app.ActivityThread.access$900(ActivityThread.java:179) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1324) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:146) 
    at android.app.ActivityThread.main(ActivityThread.java:5641) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1288) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1104) 
    at dalvik.system.NativeStart.main(Native Method) 
Caused by: android.view.InflateException: Binary XML file line #18: Error inflating class fragment 
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:719) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:761) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:498) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:398) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:354) 
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284) 
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
    at xxx.com.au.abcd.activities.AddInfoActivity.onCreate(AddInfoActivity.java:33) 
    at android.app.Activity.performCreate(Activity.java:5484) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2400) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2498)  
    at android.app.ActivityThread.access$900(ActivityThread.java:179)  
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1324)  
    at android.os.Handler.dispatchMessage(Handler.java:102)  
    at android.os.Looper.loop(Looper.java:146)  
    at android.app.ActivityThread.main(ActivityThread.java:5641)  
    at java.lang.reflect.Method.invokeNative(Native Method)  
    at java.lang.reflect.Method.invoke(Method.java:515)  
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1288)  
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1104)  
    at dalvik.system.NativeStart.main(Native Method)  
Caused by: java.lang.NullPointerException 
    at xxx.com.au.abcd.activities.NavigationDrawerFragment.onCreateView(NavigationDrawerFragment.java:103) 
    at android.app.Fragment.performCreateView(Fragment.java:1700) 
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:866) 
    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1040) 
    at android.app.FragmentManagerImpl.addFragment(FragmentManager.java:1142) 
    at android.app.Activity.onCreateView(Activity.java:5020) 
    at android.support.v4.app.BaseFragmentActivityHoneycomb.onCreateView(BaseFragmentActivityHoneycomb.java:36) 
    at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:75) 
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:695) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:761)  
    at android.view.LayoutInflater.inflate(LayoutInflater.java:498)  
    at android.view.LayoutInflater.inflate(LayoutInflater.java:398)  
    at android.view.LayoutInflater.inflate(LayoutInflater.java:354)  
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284)  
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)  
    at xxx.com.au.abcd.activities.AddInfoActivity.onCreate(AddInfoActivity.java:33)  
    at android.app.Activity.performCreate(Activity.java:5484)  
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)  
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2400)  
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2498)  
    at android.app.ActivityThread.access$900(ActivityThread.java:179)  
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1324)  
    at android.os.Handler.dispatchMessage(Handler.java:102)  
    at android.os.Looper.loop(Looper.java:146)  
    at android.app.ActivityThread.main(ActivityThread.java:5641)  
    at java.lang.reflect.Method.invokeNative(Native Method)  
    at java.lang.reflect.Method.invoke(Method.java:515) 

Und das ist meine Tätigkeit mit Navigationsleiste

AddInfoActivity.java

import android.app.Activity; 

import butterknife.ButterKnife; 
import tekhinno.com.au.mygulukose.R; 

public class AddInfoActivity extends BaseActivity 
     implements NavigationDrawerFragment.NavigationDrawerCallbacks { 

    /** 
    * Fragment managing the behaviors, interactions and presentation of the navigation drawer. 
    */ 
    private NavigationDrawerFragment mNavigationDrawerFragment; 

    /** 
    * Used to store the last screen title. For use in {@link #restoreActionBar()}. 
    */ 
    private CharSequence mTitle; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.add_info_activity); 

     ButterKnife.inject(this); 

     mNavigationDrawerFragment = (NavigationDrawerFragment) 
       getFragmentManager().findFragmentById(R.id.navigation_drawer); 
     mTitle = getTitle(); 

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

    @Override 
    public void onNavigationDrawerItemSelected(int position) { 
     // update the main content by replacing fragments 
     FragmentManager fragmentManager = getFragmentManager(); 
     fragmentManager.beginTransaction() 
       .replace(R.id.container, PlaceholderFragment.newInstance(position + 1)) 
       .commit(); 
    } 

    public void onSectionAttached(int number) { 
     switch (number) { 
      case 1: 
       mTitle = getString(R.string.title_section1); 
       break; 
      case 2: 
       mTitle = getString(R.string.title_section2); 
       break; 
      case 3: 
       mTitle = getString(R.string.title_section3); 
       break; 
     } 
    } 

    public void restoreActionBar() { 
     ActionBar actionBar = getActionBar(); 
     actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); 
     actionBar.setDisplayShowTitleEnabled(true); 
     actionBar.setTitle(mTitle); 
    } 

    /** 
    * A placeholder fragment containing a simple view. 
    */ 
    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"; 

     public PlaceholderFragment() { 
     } 

     /** 
     * 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; 
     } 

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

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

} 

NavigationDrawerFragment.java

import butterknife.ButterKnife; 
import tekhinno.com.au.mygulukose.R; 

/** 
* Fragment used for managing interactions for and presentation of a navigation drawer. 
* See the <a href="https://developer.android.com/design/patterns/navigation-drawer.html#Interaction"> 
* design guidelines</a> for a complete explanation of the behaviors implemented here. 
*/ 
public class NavigationDrawerFragment extends Fragment { 

    /** 
    * Remember the position of the selected item. 
    */ 
    private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position"; 

    /** 
    * Per the design guidelines, you should show the drawer on launch until the user manually 
    * expands it. This shared preference tracks this. 
    */ 
    private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned"; 

    /** 
    * A pointer to the current callbacks instance (the Activity). 
    */ 
    private NavigationDrawerCallbacks mCallbacks; 

    /** 
    * Helper component that ties the action bar to the navigation drawer. 
    */ 
    private ActionBarDrawerToggle mDrawerToggle; 

    private DrawerLayout mDrawerLayout; 
    private ListView mDrawerListView; 
    private View mFragmentContainerView; 

    private int mCurrentSelectedPosition = 0; 
    private boolean mFromSavedInstanceState; 
    private boolean mUserLearnedDrawer; 

    public NavigationDrawerFragment() { 
    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     // Read in the flag indicating whether or not the user has demonstrated awareness of the 
     // drawer. See PREF_USER_LEARNED_DRAWER for details. 
     SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity()); 
     mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false); 

     if (savedInstanceState != null) { 
      mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION); 
      mFromSavedInstanceState = true; 
     } 

     // Select either the default item (0) or the last selected item. 
     selectItem(mCurrentSelectedPosition); 
    } 

    @Override 
    public void onActivityCreated(Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 
     // Indicate that this fragment would like to influence the set of actions in the action bar. 
     setHasOptionsMenu(true); 
    } 

    **@Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     mDrawerListView = (ListView) inflater.inflate(
       R.layout.drawer_add_info, 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; 
    }** 

    public boolean isDrawerOpen() { 
     return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView); 
    } 

    /** 
    * Users of this fragment must call this method to set up the navigation drawer interactions. 
    * 
    * @param fragmentId The android:id of this fragment in its activity's layout. 
    * @param drawerLayout The DrawerLayout containing this fragment's UI. 
    */ 
    public void setUp(int fragmentId, DrawerLayout drawerLayout) { 
     mFragmentContainerView = getActivity().findViewById(fragmentId); 
     mDrawerLayout = drawerLayout; 

     // set a custom shadow that overlays the main content when the drawer opens 
     mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); 
     // set up the drawer's list view with items and click listener 

     ActionBar actionBar = getActionBar(); 
     actionBar.setDisplayHomeAsUpEnabled(true); 
     actionBar.setHomeButtonEnabled(true); 

     // ActionBarDrawerToggle ties together the the proper interactions 
     // between the navigation drawer and the action bar app icon. 
     mDrawerToggle = new ActionBarDrawerToggle(
       getActivity(),     /* host Activity */ 
       mDrawerLayout,     /* DrawerLayout object */ 
       R.drawable.ic_drawer,    /* nav drawer image to replace 'Up' caret */ 
       R.string.navigation_drawer_open, /* "open drawer" description for accessibility */ 
       R.string.navigation_drawer_close /* "close drawer" description for accessibility */ 
     ) { 
      @Override 
      public void onDrawerClosed(View drawerView) { 
       super.onDrawerClosed(drawerView); 
       if (!isAdded()) { 
        return; 
       } 

       getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu() 
      } 

      @Override 
      public void onDrawerOpened(View drawerView) { 
       super.onDrawerOpened(drawerView); 
       if (!isAdded()) { 
        return; 
       } 

       if (!mUserLearnedDrawer) { 
        // The user manually opened the drawer; store this flag to prevent auto-showing 
        // the navigation drawer automatically in the future. 
        mUserLearnedDrawer = true; 
        SharedPreferences sp = PreferenceManager 
          .getDefaultSharedPreferences(getActivity()); 
        sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply(); 
       } 

       getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu() 
      } 
     }; 

     // If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer, 
     // per the navigation drawer design guidelines. 
     if (!mUserLearnedDrawer && !mFromSavedInstanceState) { 
      mDrawerLayout.openDrawer(mFragmentContainerView); 
     } 

     // Defer code dependent on restoration of previous instance state. 
     mDrawerLayout.post(new Runnable() { 
      @Override 
      public void run() { 
       mDrawerToggle.syncState(); 
      } 
     }); 

     mDrawerLayout.setDrawerListener(mDrawerToggle); 
    } 

    private void selectItem(int position) { 
     mCurrentSelectedPosition = position; 
     if (mDrawerListView != null) { 
      mDrawerListView.setItemChecked(position, true); 
     } 
     if (mDrawerLayout != null) { 
      mDrawerLayout.closeDrawer(mFragmentContainerView); 
     } 
     if (mCallbacks != null) { 
      mCallbacks.onNavigationDrawerItemSelected(position); 
     } 
    } 

    @Override 
    public void onAttach(Activity activity) { 
     super.onAttach(activity); 
     try { 
      mCallbacks = (NavigationDrawerCallbacks) activity; 
     } catch (ClassCastException e) { 
      throw new ClassCastException("Activity must implement NavigationDrawerCallbacks."); 
     } 
    } 

    @Override 
    public void onDetach() { 
     super.onDetach(); 
     mCallbacks = null; 
    } 

    @Override 
    public void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition); 
    } 

    @Override 
    public void onConfigurationChanged(Configuration newConfig) { 
     super.onConfigurationChanged(newConfig); 
     // Forward the new configuration the drawer toggle component. 
     mDrawerToggle.onConfigurationChanged(newConfig); 
    } 

    @Override 
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 
     // If the drawer is open, show the global app actions in the action bar. See also 
     // showGlobalContextActionBar, which controls the top-left area of the action bar. 
     if (mDrawerLayout != null && isDrawerOpen()) { 
      inflater.inflate(R.menu.global, menu); 
      showGlobalContextActionBar(); 
     } 
     super.onCreateOptionsMenu(menu, inflater); 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     if (mDrawerToggle.onOptionsItemSelected(item)) { 
      return true; 
     } 

     if (item.getItemId() == R.id.action_example) { 
      Toast.makeText(getActivity(), "Example action.", Toast.LENGTH_SHORT).show(); 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

    /** 
    * Per the navigation drawer design guidelines, updates the action bar to show the global app 
    * 'context', rather than just what's in the current screen. 
    */ 
    private void showGlobalContextActionBar() { 
     ActionBar actionBar = getActionBar(); 
     actionBar.setDisplayShowTitleEnabled(true); 
     actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); 
     actionBar.setTitle(R.string.app_name); 
    } 

    private ActionBar getActionBar() { 
     return getActivity().getActionBar(); 
    } 

    /** 
    * Callbacks interface that all activities using this fragment must implement. 
    */ 
    public static interface NavigationDrawerCallbacks { 
     /** 
     * Called when an item in the navigation drawer is selected. 
     */ 
     void onNavigationDrawerItemSelected(int position); 
    } 
} 

Und diese ein re mein Layout-Dateien,

fragment_add_info.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:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context="tekhinno.com.au.mygulukose.activities.AddInfoActivity$PlaceholderFragment"> 

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

</RelativeLayout> 

drawer_add_info.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:background="#cccc" 
    android:choiceMode="singleChoice" 
    android:divider="@android:color/transparent" 
    android:dividerHeight="0dp" 
    tools:context="tekhinno.com.au.mygulukose.activities.NavigationDrawerFragment" /> 

add_info_activity.xml

<!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. --> 
<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="tekhinno.com.au.mygulukose.activities.AddInfoActivity"> 

    <!-- As the main content view, the view below consumes the entire 
     space available using match_parent in both dimensions. --> 
    <FrameLayout 
     android:id="@+id/container" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" /> 

    <!-- The drawer is given a fixed width in dp and extends the full height of 
     the container. --> 
    <fragment 
     android:id="@+id/navigation_drawer" 
     android:name="tekhinno.com.au.mygulukose.activities.NavigationDrawerFragment" 
     android:layout_width="@dimen/navigation_drawer_width" 
     android:layout_height="match_parent" 
     android:layout_gravity="start" 
     tools:layout="@layout/drawer_add_info" /> 

</android.support.v4.widget.DrawerLayout> 

HINWEIS: - Diese Layoutdateien und NavigationDrawerFragment.java wurden von Android Studio generiert. Haben Sie eine Idee zu diesem Problem?

Answer 1

Sie verwenden getFragmentManager(), um den Fragmentmanager abzurufen. Sie müssen SupportFragmentManager abrufen, wenn Sie AppCompatActivity durch BaseActivity erweitern.

@Override 
public void onNavigationDrawerItemSelected(int position) { 
    // update the main content by replacing fragments 
    FragmentManager fragmentManager = getSupportFragmentManager(); 
    fragmentManager.beginTransaction() 
      .replace(R.id.container, PlaceholderFragment.newInstance(position + 1)) 
      .commit(); 
} 

Hinweis: Bei der Verwendung von Support-Paketen müssen Sie SupportFragmentManager verwenden.