title: ClassCastException when using LinearLayout.LayoutParams
body: <p>This is the exception:</p>
  
  <pre><code>07-20 19:52:14.193: E/AndroidRuntime(3908): FATAL EXCEPTION: main
  07-20 19:52:14.193: E/AndroidRuntime(3908): java.lang.ClassCastException: android.view.ViewGroup$LayoutParams cannot be cast to android.widget.LinearLayout$LayoutParams
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.widget.LinearLayout.measureVertical(LinearLayout.java:634)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.widget.LinearLayout.onMeasure(LinearLayout.java:553)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.View.measure(View.java:12892)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.View.measure(View.java:12892)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1249)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.View.measure(View.java:12892)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.View.measure(View.java:12892)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.widget.LinearLayout.measureVertical(LinearLayout.java:812)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.widget.LinearLayout.onMeasure(LinearLayout.java:553)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.View.measure(View.java:12892)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4698)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2265)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.View.measure(View.java:12892)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1240)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2628)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.os.Handler.dispatchMessage(Handler.java:99)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.os.Looper.loop(Looper.java:137)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at android.app.ActivityThread.main(ActivityThread.java:4507)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at java.lang.reflect.Method.invokeNative(Native Method)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at java.lang.reflect.Method.invoke(Method.java:511)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
  07-20 19:52:14.193: E/AndroidRuntime(3908):     at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>I can't see a line where the exception is thrown so I can't figure it out quite good. I do know it is in these lines:</p>
  
  <pre><code>public class TodayFragment extends Fragment {
  
  ListView listView;
  String[] urls;
  ActionBar mActionBar;
  Spinner spinner1;
  
  public TodayFragment() {
  }
  
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
          Bundle savedInstanceState) {
      LinearLayout linear = new LinearLayout(getActivity());
      linear.setOrientation(LinearLayout.VERTICAL);
  
      spinner1 = new Spinner(getActivity());
      spinner1.setLayoutParams(new LayoutParams(
              LinearLayout.LayoutParams.WRAP_CONTENT,
              LinearLayout.LayoutParams.WRAP_CONTENT));
      linear.addView(spinner1);
      listView = new ListView(getActivity());
      spinner1.setLayoutParams(new LayoutParams(
              LinearLayout.LayoutParams.MATCH_PARENT,
              LinearLayout.LayoutParams.WRAP_CONTENT));
      linear.addView(listView);
  
      new ParseHTML().execute();
      return linear;
      }
  }
  </code></pre>
  
  <p>The fragment I'm using is android.support.v4.app.Fragment. What causes this?</p>