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Ошибка приложения при добавлении фрагмента

2015-08-07 5 views
0

Я пытаюсь создать приложение, подобное Google Music, с ящиком навигации и вкладками. Часть ящика навигации работает, но теперь я не могу заставить вкладки работать. Добавление фрагмента (в конце главного файла onCreate) приложение сбой (я заметил, что иногда это не сбой? !, но в 90% он сбой). Я новичок в Android и не знаю, откуда эта проблема. Сообщения об ошибках кажутся дескриптивными, но я не могу поместить свой палец на часть моего кода.Ошибка приложения при добавлении фрагмента

Основная деятельность - AppCompatActivity. Раскладка main.xml:

<?xml version="1.0" encoding="utf-8"?> 

<android.support.v4.widget.DrawerLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:id="@+id/drawer_layout" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <!-- The main content view --> 
    <LinearLayout 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     android:orientation="vertical" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:id="@+id/main_layout" 
     android:weightSum="1"> 

     <!-- Toolbar --> 
     <!-- http://stackoverflow.com/questions/26708230/where-do-i-define-xml-for-the-toolbar-widget-in-android-5-0 --> 
     <include layout="@layout/toolbar_actionbar_with_headerbar" /> 

     <fragment 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:name="android.support.v4.app.ListFragment" 
      android:id="@+id/fragment" /> 
    </LinearLayout>  

    <!-- The navigation drawer --> 
    <android.support.v7.widget.RecyclerView 
     android:id="@+id/RecyclerView" 
     android:layout_width="250dp" 
     android:layout_height="match_parent" 
     android:layout_gravity="left"  
     android:background="#ffffff" 
     android:scrollbars="vertical">  
    </android.support.v7.widget.RecyclerView> 

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

Все отлично работает до конца onCreate -функции основной:

// Load Tab Fragment 
FragmentManager fragmentManager = getSupportFragmentManager(); 
if (fragmentManager != null) { 
    FragmentTransaction transaction = fragmentManager.beginTransaction(); 
    if (transaction != null) { 
     main_tabs_frag = new TabbedActivity(); 
     if (main_tabs_frag != null) { 
      transaction.add(R.id.fragment, main_tabs_frag); 
      transaction.commit(); 
     } 
    } 
}

Вот это TabbedActivity:

package com.example.xy.test; 

import java.util.Locale; 

import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentPagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.TextView; 

public class TabbedActivity extends Fragment { 

    /** 
    * The {@link android.support.v4.view.PagerAdapter} that will provide 
    * fragments for each of the sections. We use a 
    * {@link android.support.v4.app.FragmentPagerAdapter} derivative, which 
    * will keep every loaded fragment in memory. If this becomes too memory 
    * intensive, it may be best to switch to a 
    * {@link android.support.v4.app.FragmentStatePagerAdapter}. 
    */ 
    SectionsPagerAdapter mSectionsPagerAdapter; 

    public static final String TAG = TabbedActivity.class.getSimpleName(); 

    /** 
    * The {@link ViewPager} that will host the section contents. 
    */ 
    ViewPager mViewPager; 


    public static TabbedActivity newInstance() { 
     return new TabbedActivity(); 
    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     View v = inflater.inflate(R.layout.fragment_tabbed, container, false); 
     mSectionsPagerAdapter = new SectionsPagerAdapter(
       getChildFragmentManager()); 

     mViewPager = (ViewPager) v.findViewById(R.id.pager); 
     mViewPager.setAdapter(mSectionsPagerAdapter); 

     return v; 
    } 

    /** 
    * A {@link FragmentPagerAdapter} that returns a fragment corresponding to 
    * one of the sections/tabs/pages. 
    */ 
    public class SectionsPagerAdapter extends FragmentPagerAdapter { 

     public SectionsPagerAdapter(FragmentManager fm) { 
      super(fm); 
     } 

     @Override 
     public Fragment getItem(int position) { 
      // getItem is called to instantiate the fragment for the given page. 
      // Return a DummySectionFragment (defined as a static inner class 
      // below) with the page number as its lone argument. 
      Fragment fragment = new DummySectionFragment(); 
      Bundle args = new Bundle(); 
      args.putInt(DummySectionFragment.ARG_SECTION_NUMBER, position + 1); 
      fragment.setArguments(args); 
      return fragment; 
     } 

     @Override 
     public int getCount() { 
      // Show 3 total pages. 
      return 3; 
     } 

     @Override 
     public CharSequence getPageTitle(int position) { 
      Locale l = Locale.getDefault(); 
      switch (position) { 
       case 0: 
        return getString(R.string.tab_1).toUpperCase(l); 
       case 1: 
        return getString(R.string.tab_2).toUpperCase(l); 
       case 2: 
        return getString(R.string.tab_3).toUpperCase(l); 
      } 
      return null; 
     } 
    } 

    /** 
    * A dummy fragment representing a section of the app, but that simply 
    * displays dummy text. 
    */ 
    public static class DummySectionFragment extends Fragment { 
     /** 
     * The fragment argument representing the section number for this 
     * fragment. 
     */ 
     public static final String ARG_SECTION_NUMBER = "section_number"; 

     public DummySectionFragment() { 
     } 

     @Override 
     public View onCreateView(LayoutInflater inflater, ViewGroup container, 
           Bundle savedInstanceState) { 
      View rootView = inflater.inflate(R.layout.fragment_tabbed_content, 
        container, false); 
      TextView dummyTextView = (TextView) rootView 
        .findViewById(R.id.section_label); 
      dummyTextView.setText(Integer.toString(getArguments().getInt(
        ARG_SECTION_NUMBER))); 
      return rootView; 
     } 
    } 

}

fragement_tabbed_content.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=".TabbedActivity$DummySectionFragment" > 

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

</RelativeLayout>

fragment_tabbed.xml

<android.support.v4.view.ViewPager 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:id="@+id/pager" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent"> 

    <!-- 
     This title strip will display the currently visible page title, as well as the page 
     titles for adjacent pages. 
    --> 
    <android.support.v4.view.PagerTitleStrip 
     android:id="@+id/pager_title_strip" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_gravity="top" 
     android:background="#33b5e5" 
     android:paddingBottom="4dp" 
     android:paddingTop="4dp" 
     android:textColor="#fff" /> 

</android.support.v4.view.ViewPager>

Это здесь выход ошибки:

08-07 09:26:30.511 1874-1874/com.example.thomas.noteapp E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    Process: com.example.thomas.noteapp, PID: 1874 
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.thomas.noteapp/com.example.thomas.noteapp.main}: android.view.InflateException: Binary XML file line #33: Error inflating class fragment 
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298) 
      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360) 
      at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3912) 
      at android.app.ActivityThread.access$900(ActivityThread.java:144) 
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1284) 
      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 #33: Error inflating class fragment 
      at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:763) 
      at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
      at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) 
      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.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249) 
      at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106) 
      at com.example.thomas.noteapp.main.onCreate(main.java:46) 
      at android.app.Activity.performCreate(Activity.java:5937) 
      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.handleRelaunchActivity(ActivityThread.java:3912) 
            at android.app.ActivityThread.access$900(ActivityThread.java:144) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1284) 
            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$MethodAndArgsCaller.run(ZygoteInit.java:899) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694) 
    Caused by: java.lang.IllegalStateException: Fragment android.support.v4.app.ListFragment did not create a view. 
      at android.support.v4.app.FragmentManagerImpl.onCreateView(FragmentManager.java:2200) 
      at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:300) 
      at android.support.v7.app.AppCompatDelegateImplV7.callActivityOnCreateView(AppCompatDelegateImplV7.java:816) 
      at android.support.v7.app.AppCompatDelegateImplV11.callActivityOnCreateView(AppCompatDelegateImplV11.java:72) 
      at android.support.v7.app.AppCompatDelegateImplV7.onCreateView(AppCompatDelegateImplV7.java:804) 
      at android.support.v4.view.LayoutInflaterCompatHC$FactoryWrapperHC.onCreateView(LayoutInflaterCompatHC.java:44) 
      at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:725) 
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:806) 
            at android.view.LayoutInflater.rInflate(LayoutInflater.java:809) 
            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.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:249) 
            at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:106) 
            at com.example.thomas.noteapp.main.onCreate(main.java:46) 
            at android.app.Activity.performCreate(Activity.java:5937) 
            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.handleRelaunchActivity(ActivityThread.java:3912) 
            at android.app.ActivityThread.access$900(ActivityThread.java:144) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1284) 
            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)

источник

2015-08-07 user2366975

ответ

0

В вашем фрагменте View вы должны указать свое имя класса фрагмента вместо списка фрагмента.

<fragment 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:name="packageName.className" 
     android:id="@+id/fragment" />

и убедитесь, что ваша «деятельность» расширяет «FragmentActivity».

источник

2015-08-07 09:47:52

+0

Вы говорите о моей основной деятельности, не так ли? 'AppCompatActivity' расширяет' FragmentActivity', поэтому этот пункт должен быть заполнен. – user2366975

+0

Пробовал ваше предложение, приложение все еще падает. – user2366975

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