Errore durante il gonfiaggio del frammento dal layout android-support-v4

Question

Ho problemi a lavorare con i frammenti sulla piattaforma 2.2. Ho importato la libreria android-support-v4.jar per supportare i frammenti.
Ho provato a cambiare il target in Honeycomb 3.0 e il codice funziona. Quindi, voglio sapere se esiste un modo per lavorare con i frammenti su una piattaforma nativa e un modo diverso per farlo con le versioni precedenti.

Ecco il mio AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
    package="com.nsy.testefragmentos" 
    android:versionCode="1" 
    android:versionName="1.0" > 
    <uses-sdk android:minSdkVersion="8" /> 
    <application 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" > 
     <activity 
      android:label="@string/app_name" 
      android:name=".TesteFragmentosActivity" > 
      <intent-filter > 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
      <activity android:name="FragmentoLista" /> 
      <activity android:name="FragmentoDetalhe" /> 
    </application> 
</manifest> 

E qui è la mia classe principale

package com.nsy.testefragmentos; 

import android.app.Activity; 
import android.os.Bundle; 

public class TesteFragmentosActivity extends Activity { 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
    } 
} 

E, infine, il frammento chiamato dal file main.xml:

package com.nsy.testefragmentos; 

import android.os.Bundle; 
import android.support.v4.app.ListFragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 

public class FragmentoLista extends ListFragment { 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     return super.onCreateView(inflater, container, savedInstanceState);   
    } 
} 

quando corro , l'errore di seguire viene visualizzato nel logCat:

12-24 11:46:16.708: E/AndroidRuntime(395): FATAL EXCEPTION: main 
12-24 11:46:16.708: E/AndroidRuntime(395): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nsy.testefragmentos/com.nsy.testefragmentos.TesteFragmentosActivity}: android.view.InflateException: Binary XML file line #8: Error inflating class fragment 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.os.Handler.dispatchMessage(Handler.java:99) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.os.Looper.loop(Looper.java:123) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.app.ActivityThread.main(ActivityThread.java:4627) 
12-24 11:46:16.708: E/AndroidRuntime(395): at java.lang.reflect.Method.invokeNative(Native Method) 
12-24 11:46:16.708: E/AndroidRuntime(395): at java.lang.reflect.Method.invoke(Method.java:521) 
12-24 11:46:16.708: E/AndroidRuntime(395): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
12-24 11:46:16.708: E/AndroidRuntime(395): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
12-24 11:46:16.708: E/AndroidRuntime(395): at dalvik.system.NativeStart.main(Native Method) 
12-24 11:46:16.708: E/AndroidRuntime(395): Caused by: android.view.InflateException: Binary XML file line #8: Error inflating class fragment 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:576) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.view.LayoutInflater.rInflate(LayoutInflater.java:618) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.view.LayoutInflater.inflate(LayoutInflater.java:407) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.view.LayoutInflater.inflate(LayoutInflater.java:320) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.view.LayoutInflater.inflate(LayoutInflater.java:276) 
12-24 11:46:16.708: E/AndroidRuntime(395): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.app.Activity.setContentView(Activity.java:1647) 
12-24 11:46:16.708: E/AndroidRuntime(395): at com.nsy.testefragmentos.TesteFragmentosActivity.onCreate(TesteFragmentosActivity.java:12) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
12-24 11:46:16.708: E/AndroidRuntime(395): ... 11 more 
12-24 11:46:16.708: E/AndroidRuntime(395): Caused by: java.lang.ClassNotFoundException: android.view.fragment in loader dalvik.system.PathClassLoader[/data/app/com.nsy.testefragmentos-1.apk] 
12-24 11:46:16.708: E/AndroidRuntime(395): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243) 
12-24 11:46:16.708: E/AndroidRuntime(395): at java.lang.ClassLoader.loadClass(ClassLoader.java:573) 
12-24 11:46:16.708: E/AndroidRuntime(395): at java.lang.ClassLoader.loadClass(ClassLoader.java:532) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.view.LayoutInflater.createView(LayoutInflater.java:466) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.view.LayoutInflater.onCreateView(LayoutInflater.java:544) 
12-24 11:46:16.708: E/AndroidRuntime(395): at com.android.internal.policy.impl.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:66) 
12-24 11:46:16.708: E/AndroidRuntime(395): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:563) 
12-24 11:46:16.708: E/AndroidRuntime(395): ... 20 more 
12-24 11:46:21.828: I/Process(395): Sending signal. PID: 395 SIG: 9 

Davvero non so cosa sto facendo di sbagliato =/Qualcuno può aiutarmi? thnkx

Answer 1

L'attività dovrebbe estendere FragmentActivity anziché Activity. Ho avuto lo stesso problema me stesso.

public class TesteFragmentosActivity extends FragmentActivity { 
    ... 
} 

Answer 2

A volte l'errore (errore di miniera) ho affrontato questo, ho usando frammento (android.app.fragment) in un file e in un altro chiamandolo con Fragment (android.support.v4.app. Frammento). Dopo aver controllato la linea Uno su uno ho trovato questo e risolto, per questo errore ho trascorso 5-6 ore, stavo implementando ImageSlider