title: contextthemewrapper cannot be cast to activity
body: <p>in my small app i have a PageAdapter->Fragment->ListView->ImageView. On onImageClick  i want display my image in another Fragment (Fragment3), but when i load an image in my Fragment3 get an Exception</p>
  
  <pre><code>public class Fragment3 extends DialogFragment {
  ImageLoader imageLoader;
  ...
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
      view = (ViewGroup) inflater.inflate(R.layout.fragment3_layout, container, false);
      imageView = (ImageView) view.findViewById(R.id.imageViewFrag3);
      detail = (TextView) view.findViewById(R.id.textViewFrag3);
      imageUrl = getArguments().getString("URL");
      imageView.setTag(imageUrl); 
      activity=this;      
      imageLoader = new ImageLoader(activity.getActivity().getApplicationContext());      
      imageLoader.DisplayImage(imageUrl, (Activity) activity.getActivity(), imageView);       
      return view;
  }
  ...
  }
  </code></pre>
  
  <p>and code which creates an Exception. When i create a fragment and add the ListView all passed ok, but when i create another fragment (child) and want to load Photo it fails.</p>
  
  <p>code, how i create a child fragment, without PageAdapter</p>
  
  <pre><code>holder.imgViewImage = (ImageView) vi.findViewById(R.id.imageView01);
          holder.imgViewImage.setOnClickListener(new OnClickListener() {
              @Override
              public void onClick(View v) {                   
                  android.support.v4.app.FragmentTransaction ft = activity.getFragmentManager().beginTransaction();                   
                  Fragment3 newFragment = Fragment3.newInstance();                    
                  Bundle bundle=new Bundle();
                  bundle.putString("URL", holder.imgViewImage.getTag().toString());
                  newFragment.setArguments(bundle);
                  newFragment.show( ft, "dialog");
                  Log.i("!!!", "Click on image");                 
              }
          })
  </code></pre>
  
  <p>here is Photo Loader Thread,</p>
  
  <pre><code>class PhotosLoader extends Thread {
      public void run() {
          try {
              while(true)
              {
                  if(photosQueue.photosToLoad.size()==0)
                      synchronized(photosQueue.photosToLoad){
                          photosQueue.photosToLoad.wait();
                      }
                  if(photosQueue.photosToLoad.size()!=0)
                  {
                      PhotoToLoad photoToLoad;
                      synchronized(photosQueue.photosToLoad){
                          photoToLoad=photosQueue.photosToLoad.pop();
                      }
                      Bitmap bmp=getBitmap(photoToLoad.url);
                      cache.put(photoToLoad.url, bmp);
                      if(((String)photoToLoad.imageView.getTag()).equals(photoToLoad.url)){
                          BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad.imageView);            
                          //Exception contextthemewrapper cannot be cast to activity !!!
                          Activity a= (Activity)(photoToLoad.imageView.getContext());
                          a.runOnUiThread(bd);
                      }
                  }
                  if(Thread.interrupted())
                      break;
              }
          } catch (InterruptedException e) {
          }
      }
  }
  </code></pre>
  
  <p>and Exception</p>
  
  <pre><code>02-09 08:22:57.510: E/AndroidRuntime(1449): FATAL EXCEPTION: Thread-114
  02-09 08:22:57.510: E/AndroidRuntime(1449): java.lang.ClassCastException: android.view.ContextThemeWrapper cannot be cast to android.app.Activity
  02-09 08:22:57.510: E/AndroidRuntime(1449):     at com.example.ids.ImageLoader$PhotosLoader.run(ImageLoader.java:171)
  </code></pre>