Error inflating class fragment

Question

I get the Error

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

when I switch via the portrait and the landscape mode. I'm using fragments. My xml is:

 <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>

If I switch via landscape and portrait mode everything works fine. But when I click on my fragment (and I can see my fragment) and then switch to the other mode I get the error. Any idea how I can solve it? Found some answers here but none of these helped me out...

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

Answer 1

Could you post the fragment's onCreate and onCreateView methods? I had exactly same exception which was caused by an exception in the fragment onCreate method, when I fixed that problem it fixed the Error inflating class fragment.

Answer 2

None of the solutions mentioned above helped me. In the log I could find the detail of the exception as mentioned below:

06-19 16:20:37.885: E/AndroidRuntime(23973): Caused by: java.lang.RuntimeException: API key not found.  Check that /meta-data/ android:name="com.google.android.maps.v2.API_KEY" android:value="your API key"/ is in the application element of AndroidManifest.xml.

I did this and my code was working!

<meta-data  android:name="com.google.android.maps.v2.API_KEY" android:value="AIzaSyCl1yGPZ3mpxxxxxxxAz2R-t7zcWVzrHUL9k"/>
</application>

Answer 3

If you want to inherit the AppCompatActivity, then you can do something like this- In the activity xml, use a FrameLayout like this-

<FrameLayout
    android:id="@+id/result_fragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_below="@+id/progress_frame"/>

and in the activity onCreate-

final FragmentManager supportFragmentManager = getSupportFragmentManager();
    FragmentTransaction ft = supportFragmentManager.beginTransaction();
    ft.replace(R.id.result_fragment, fphResultActivityFragment, "result fragment");
    ft.commitAllowingStateLoss();

Answer 4

I had a similar problem; after running the AdMob example, I tried to insert Ads in my app, causing this error:

01-02 16:48:51.269    8199-8199/it.dndc.BreathPlot E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.IllegalStateException: Could not execute method of the activity
 Caused by: android.view.InflateException: Binary XML file line #57: Error inflating class fragment

The solution is: you cannot insert the fragment for an Ad into a ListActivity. Instead, I could add it to a FragmentActivity and to an ActionBarActivity without any problem.

My suggestion is: start from the AdMob example and add into it your existing app: I would have saved a lot of time !!!

Answer 5

If your fragment is a List Fragment then the activity which uses that fragment must implement the onFragmentInteraction interface.

Answer 6

I was having the same problem as you are facing. None of the tips on top helped me. Later, I found that all I had to do is fix my imports from:

import android.app.Fragment;

to:

import android.support.v4.app.Fragment;