在我的小應用程序中我有一個PageAdapter-> Fragment-> ListView-> ImageView。在onImageClick我想在另一個片段(Fragment3)顯示我的形象,但是當我加載我Fragment3圖像獲取異常contextthemewrapper不能投到活動
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;
}
...
}
和代碼創建一個例外。當我創建一個片段,並添加ListView全部通過確定,但是當我創建另一個片段(子),並希望加載照片失敗。
碼,我如何創建一個子片段,沒有PageAdapter
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");
}
})
這裏的Photo Loader主題,
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) {
}
}
}
和異常
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)
這裏是這段代碼Activity a =(Activity)photoToLoad.imageView.getContext(); ? – keshav