具有兼容性的片段库

Question

我试图以最简单的方式使用片段。我寻找有第一个显示一组按钮，这将导致不同的按钮。 我使用兼容性库，它似乎很好包括，并且我所有的导入都是正确的。

这里是如何我试图这样做：

主营：

public class MainActivity extends FragmentActivity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
    } 
} 

的main.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="vertical" > 

    <fragment 
     android:id="@+id/titles_frag" 
     android:name="com.clicmobile.cannes.TitlesFragments" 
     android:layout_width="match_parent" 
     android:layout_height="0dp" 
     android:layout_weight="1" > 
    </fragment> 

    <FrameLayout 
     android:id="@+id/details" 
     android:layout_width="match_parent" 
     android:layout_height="0dp" 
     android:layout_weight="1" /> 

</LinearLayout> 

我TitlesFragments：

public class TitlesFragments extends Fragment { 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 

     View mainView = inflater.inflate(R.layout.title_fragment, container, 
       false); 


     GrigFragment details = (GrigFragment) getFragmentManager() 
       .findFragmentById(R.id.details); 

解决方案： GridFragment details = new GridFragment（）;

 FragmentTransaction ft = getFragmentManager().beginTransaction(); 
     ft.replace(R.id.details, details); 
     ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE); 
     ft.commit(); 

     return mainView; 

    } 
} 

title_fragment.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="vertical" > 
    <Button 
    android:layout_height="wrap_content" 
    android:layout_width="wrap_content" 
    android:id="@+id/myButton" 
    android:text="lol" 
    /> 

</LinearLayout> 

GridFragment：

public class GrigFragment extends Fragment{ 

    public static GrigFragment newInstance() { 
     GrigFragment f = new GrigFragment(); 



      return f; 
     } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 

     View mainView = inflater.inflate(R.layout.title_fragment_2, container, false);  
     return mainView; 


    } 
} 

我title_fragment_2.xml颇为相似，我title_fragment.xml

我获得forceClose！

我的logcat：

02-14 16:29:24.500: E/AndroidRuntime(5204): FATAL EXCEPTION: main 
02-14 16:29:24.500: E/AndroidRuntime(5204): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.clicmobile.cannes/com.clicmobile.cannes.MainActivity}: android.view.InflateException: Binary XML file line #7: Error inflating class fragment 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.os.Handler.dispatchMessage(Handler.java:99) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.os.Looper.loop(Looper.java:130) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.app.ActivityThread.main(ActivityThread.java:3683) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at java.lang.reflect.Method.invokeNative(Native Method) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at java.lang.reflect.Method.invoke(Method.java:507) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at dalvik.system.NativeStart.main(Native Method) 
02-14 16:29:24.500: E/AndroidRuntime(5204): Caused by: android.view.InflateException: Binary XML file line #7: Error inflating class fragment 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:587) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.view.LayoutInflater.rInflate(LayoutInflater.java:623) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.view.LayoutInflater.inflate(LayoutInflater.java:408) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:207) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.app.Activity.setContentView(Activity.java:1657) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at com.clicmobile.cannes.MainActivity.onCreate(MainActivity.java:13) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  ... 11 more 
02-14 16:29:24.500: E/AndroidRuntime(5204): Caused by: java.lang.NullPointerException 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.support.v4.app.BackStackRecord.doAddOp(BackStackRecord.java:321) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.support.v4.app.BackStackRecord.replace(BackStackRecord.java:360) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.support.v4.app.BackStackRecord.replace(BackStackRecord.java:352) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at com.clicmobile.cannes.TitlesFragments.onCreateView(TitlesFragments.java:29) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:772) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:970) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.support.v4.app.FragmentManagerImpl.addFragment(FragmentManager.java:1048) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:257) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563) 
02-14 16:29:24.500: E/AndroidRuntime(5204):  ... 20 more 

Answer 1

你可能要一个类attritbut添加到您的xml：

<fragment 
    android:id="@+id/titles_frag" 
    android:name="com.clicmobile.cannes.TitlesFragments" 
    **android:class="com.clicmobile.cannes.TitlesFragments"** 
    android:layout_width="match_parent" 
    android:layout_height="0dp" 
    android:layout_weight="1" 
> 
</fragment>