title: Orientation Change: IllegalStateException when DialogFragment is visible
body: <p>I'd like to let Android handle orientation change. 
  Unfortunately it crashes each time a dialog is open and orientation change occurs.
  I already suspect the cause but don't know how to handle it:</p>
  
  <p>When Application first starts backstack looks like this:</p>
  
  <pre><code>02-07 15:25:36.517: I/System.out(14541): Added Fragments:
  02-07 15:25:36.517: I/System.out(14541):   #0: PortraitModeFragment{41963330 #0 id=0x7f090001 ListViewFragment}
  </code></pre>
  
  <p>great, now we open a dialog:</p>
  
  <pre><code>02-07 15:26:03.316: I/System.out(14541): Added Fragments:
  02-07 15:26:03.316: I/System.out(14541):   #0: PortraitModeFragment{41963330 #0 id=0x7f090001 ListViewFragment}
  02-07 15:26:03.326: I/System.out(14541):   #1: MyDialogFragment{4199f6a0 #1 MyDialogFragment}
  </code></pre>
  
  <p>And now when rotate the device:</p>
  
  <pre><code>02-07 15:26:37.502: E/AndroidRuntime(14541): FATAL EXCEPTION: main
  02-07 15:26:37.502: E/AndroidRuntime(14541): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.testapp/com.example.testapp.MainActivity}: android.view.InflateException: Binary XML file line #11: Error inflating class fragment
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3692)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.app.ActivityThread.access$700(ActivityThread.java:141)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1240)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.os.Handler.dispatchMessage(Handler.java:99)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.os.Looper.loop(Looper.java:137)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.app.ActivityThread.main(ActivityThread.java:5039)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at java.lang.reflect.Method.invokeNative(Native Method)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at java.lang.reflect.Method.invoke(Method.java:511)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at dalvik.system.NativeStart.main(Native Method)
  02-07 15:26:37.502: E/AndroidRuntime(14541): Caused by: android.view.InflateException: Binary XML file line #11: Error inflating class fragment
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:270)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.app.Activity.setContentView(Activity.java:1881)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at com.example.testapp.MainActivity.onCreate(MainActivity.java:17)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.app.Activity.performCreate(Activity.java:5104)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    ... 12 more
  02-07 15:26:37.502: E/AndroidRuntime(14541): Caused by: java.lang.IllegalStateException: Fragment com.example.testapp.fragments.LandscapeModeFragment did not create a view.
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:303)
  02-07 15:26:37.502: E/AndroidRuntime(14541):    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:676)
  </code></pre>
  
  <p>Interesting fun-fact: This does not happen if I first turn around the device and subsequently open the dialog and change orientation, because both fragments are preloaded and exist peacefully in the backstack:</p>
  
  <pre><code>02-07 15:34:00.015: I/System.out(15412):   #0: PortraitModeragment{419b99b0 #0 id=0x7f090001 ListViewFragment}
  02-07 15:34:00.015: I/System.out(15412):   #1: LandscapeModeFragment{419b9b88 #1 id=0x7f090003 LandscapeModeFragment}
  02-07 15:34:00.025: I/System.out(15412):   #2: MyDialogFragment{419d1da0 #2 MyDialogFragment}
  </code></pre>
  
  <p>I cant make the user rotate the smartphone around before using my app, so what to do? ;)</p>
  
  <p><strong>To reproduce:</strong></p>
  
  <p>How I add the Dialog to backstack:</p>
  
  <pre><code>MyDialogFragment myTvShowDialog = new MyDialogFragment();
  myTvShowDialog.show(getActivity().getSupportFragmentManager(),myTvShowDialog.TAG);
  </code></pre>
  
  <p>What I did was create two xml files for MainActivity:</p>
  
  <p>1 . res/layout/main.xml (PortraitMode):</p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"&gt;
       &lt;TextView android:id="@+id/textView1" android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:text="layout-land/PORTRAIT" /&gt;
       &lt;fragment class="com.example.testapp.fragments.PortraitModeFragment"
                          android:id="@+id/fragment" android:layout_weight="1"
                          android:layout_width="0px" android:layout_height="match_parent" android:tag="PortraitModeFragment"&gt;
       &lt;/fragment&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <hr>
  
  <p>2 . res/layout-land/main.xml (LandscapeMode)</p>
  
  <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" android:orientation="vertical"&gt;
      &lt;TextView   android:id="@+id/textView1"   android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="layout-land/LANDSCAPE" /&gt;
      &lt;fragment class="com.example.testapp.fragments.LandscapeModeFragment"
              android:id="@+id/LandscapeModeFragment" android:layout_weight="1"
              android:layout_width="0px" android:layout_height="0dp" android:tag="LandscapeModeFragment"&gt;
       &lt;/fragment&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>MainActivity.java:</p>
  
  <pre><code>public class MainActivity extends FragmentActivity {
      private static final String TAG = "MainActivity";
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          Log.v(TAG, "onCreate()");
          setContentView(R.layout.activity_main);
          getSupportFragmentManager().dump("", null,
                  new PrintWriter(System.out, true), null);
      }
  }
  </code></pre>
  
  <p>FragmentPortraitMode:</p>
  
  <pre><code>public class PortraitModeFragment extends Fragment {
      @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
          Bundle savedInstanceState) {
      View fragment = inflater.inflate(R.layout.portraitmodefragment_layout,
              null);
      Button findViewById = (Button) fragment.findViewById(R.id.button1);
      findViewById.setOnClickListener(new OnClickListener() {
  
          @Override
          public void onClick(View v) {
              MyDialogFragment myDialog = new MyDialogFragment();
              myDialog.show(getActivity().getSupportFragmentManager(),
                      MyDialogFragment.TAG);
          }
      });
      TextView textView = (TextView) fragment.findViewById(R.id.textView1);
      textView.setText(TAG);
      return fragment;
  }
  </code></pre>
  
  <p>Fragment LandscapeMode:</p>
  
  <pre><code>public class LandscapeModeFragment extends Fragment {
  
      public static final String TAG = "LandscapeModeFragment";
  
      @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
          Bundle savedInstanceState) {
      View fragment = inflater.inflate(R.layout.landscapemode_fragment_layout,
              container, false);
      return fragment;
  }
  }
  </code></pre>
  
  <p>landscapemode_fragment_layout.xml:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout 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"&gt;
              &lt;TextView
              android:id="@+id/textView1"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="LANDSCAPEFRAGMENT" /&gt;
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p>portraitmode_fragment_layout_xml:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;LinearLayout 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"&gt;
      &lt;Button   android:id="@+id/button1"    android:layout_width="wrap_content"    android:layout_height="wrap_content"     android:text="Button" /&gt;
  
      &lt;TextView
          android:id="@+id/textView1"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text="TextView" /&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>