title: Problem with camera when orientation changes
body: <p>I'm doing an application that calls a different activity when the device orientation changes from landscape to portrait or viceversa. The activity for the landscape mode is an augmented reality one, so I use the camera to show the surroundings to the user. However, when I try to go back to portrait, the app crashes and displays this error:</p>
  
  <pre><code>08-17 16:05:42.622: ERROR/AndroidRuntime(9769): FATAL EXCEPTION: main
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769): java.lang.RuntimeException: set display orientation failed
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.hardware.Camera.setDisplayOrientation(Native Method)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at es.ucm.look.ar.Preview.surfaceChanged(Preview.java:102)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.view.SurfaceView.updateWindow(SurfaceView.java:549)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.view.SurfaceView.setFrame(SurfaceView.java:294)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.view.View.layout(View.java:7169)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.view.View.layout(View.java:7175)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.view.View.layout(View.java:7175)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.view.View.layout(View.java:7175)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.view.ViewRoot.performTraversals(ViewRoot.java:1140)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1859)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.os.Handler.dispatchMessage(Handler.java:99)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.os.Looper.loop(Looper.java:130)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at android.app.ActivityThread.main(ActivityThread.java:3683)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at java.lang.reflect.Method.invokeNative(Native Method)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at java.lang.reflect.Method.invoke(Method.java:507)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
  08-17 16:05:42.622: ERROR/AndroidRuntime(9769):     at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>The change from portrait to landscape works normally.</p>
  
  <p>This is my android manifest (the activity "EmergenciesList" is the one for portrait mode, and "MapaMovilAR" for lanscape):</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.list" android:versionCode="1" android:versionName="1.0"&gt;
  &lt;uses-permission android:name="android.permission.CAMERA" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /&gt;
  &lt;uses-permission android:name="android.permission.INTERNET" /&gt;
  &lt;application android:icon="@drawable/icon" android:label="@string/app_name"
      android:name="cl.puc.memoria.MapaMovilApplication"&gt;
      &lt;activity android:name="cl.puc.memoria.EmergenciesList"
          android:configChanges="orientation" android:label="@string/app_name"&gt;
          &lt;intent-filter&gt;
              &lt;action android:name="android.intent.action.MAIN"&gt;&lt;/action&gt;
              &lt;category android:name="android.intent.category.LAUNCHER"&gt;    &lt;/category&gt;
          &lt;/intent-filter&gt;
      &lt;/activity&gt;
      &lt;activity android:name="cl.puc.memoria.AR.MapaMovilAR"
          android:configChanges="orientation"&gt;
      &lt;/activity&gt;
      &lt;activity android:name="es.ucm.look.ar.LookAR"&gt;&lt;/activity&gt;
  
  &lt;/application&gt;
  &lt;uses-sdk android:minSdkVersion="7" /&gt;
  
  &lt;/manifest&gt; 
  </code></pre>
  
  <p>And finally this is the code for handling the orientation change:</p>
  
  <pre><code>@Override
  public void onConfigurationChanged(Configuration newConfig) {
      super.onConfigurationChanged(newConfig);
  
      if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
          Intent el = new Intent(MapaMovilAR.this,
                  cl.puc.memoria.EmergenciesList.class);
          startActivity(el);
      } else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
          Toast.makeText(this, "portrait", Toast.LENGTH_SHORT).show();
      }
  }
  </code></pre>
  
  <p>Is there anything that could be causing the crash?</p>