Hatası alıyorum

Unable to start activity ComponentInfo{de.androidbuch.activiti/de.androidbuch.activiti.task.Activity}: android.view.InflateException: Binary XML file line #11: Error inflating class fragment

bu dikey ve yatay) modunu açtığımda. Parçaları kullanıyorum. Benim xml:

 <LinearLayout android:id="@ id/mainLayout" android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" >
    <ListView android:id="@ id/android:list" android:layout_height="wrap_content" android:layout_width="fill_parent"/> 
    <fragment android:id="@ id/fragmentDetails" android:layout_height="fill_parent" android:layout_width="fill_parent" class="de.androidbuch.activiti.task.TaskDetailsFragment"/> 
</LinearLayout>

Eğer manzara ve portre modu üzerinden geçerseniz her şey gayet iyi çalışıyor. Ama ben benim parçası (ve benim parçası görebiliyorum) tıklatın ve sonra diğer moduna geçiş yaptığınızda bir hata alıyorum. Bunu nasıl çözebilirim bir fikriniz var mı? Burada bazı cevaplar buldum ama bunların hiçbiri bana yardım etmedi

06-21 14:55:05.600: ERROR/AndroidRuntime(7636): FATAL EXCEPTION: main
06-21 14:55:05.600: ERROR/AndroidRuntime(7636): java.lang.RuntimeException: Unable to start activity         
ComponentInfo{de.androidbuch.activiti/de.androidbuch.activiti.task.Activity}:   android.view.InflateException: Binary XML file line #11: Error inflating class fragment
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1736)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1752)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3097)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.app.ActivityThread.access$1600(ActivityThread.java:123)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:997)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.os.Looper.loop(Looper.java:126)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.app.ActivityThread.main(ActivityThread.java:3998)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at java.lang.reflect.Method.invokeNative(Native Method)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at java.lang.reflect.Method.invoke(Method.java:491)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at dalvik.system.NativeStart.main(Native Method)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636): Caused by: android.view.InflateException: Binary XML file line #11: Error inflating class fragment
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:688)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:724)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:727)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.view.LayoutInflater.inflate(LayoutInflater.java:479)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.view.LayoutInflater.inflate(LayoutInflater.java:391)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.view.LayoutInflater.inflate(LayoutInflater.java:347)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:227)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.app.Activity.setContentView(Activity.java:1771)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at de.androidbuch.activiti.task.TaskActivity.onCreate(TaskActivity.java:83)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1700)
06-21 14:55:05.600: ERROR/AndroidRuntime(7636):     ... 12 more

Hdemirchian olarak kullandığınızdan emin olun

import android.support.v4.app.Fragment;

Ve ayrıca parça(lar) kullanarak Etkinliği Activity düzenli yerine FragmentActivity uzanır emin olun

import android.support.v4.app.FragmentActivity;

FragmentActivity sınıf almak için.