小编zon*_*ond的帖子

在我的小应用程序中,我有一个PageAdapter-> Fragment-> ListView-> ImageView.在onImageClick上我希望在另一个片段(Fragment3)中显示我的图像,但是当我在Fragment3中加载图像时会得到一个例外

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;
}
...
}

和创建异常的代码.当我创建一个片段并添加ListView时,所有传递确定,但是当我创建另一个片段(子)并想要加载Photo时它失败了.

代码,如何创建子片段,没有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 …

我有碎片的问题.

我面临的问题是,我有一个简单的问题 DialogFragment

public class Fragment3 extends DialogFragment  {
private Fragment activity;
ViewGroup root;

static Fragment3 newInstance() {
    Fragment3 f = new Fragment3();
    return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {        
    root = (ViewGroup) inflater.inflate(R.layout.fragment3_layout, container, false);
    return root;
  } 
}  

我想从另一个片段创建这个片段

public class ListViewImageAdapter extends BaseAdapter {

private Fragment activity;
....

public ListViewImageAdapter(Fragment activity, ArrayList<Object> listImages) {
    this.activity = activity;
 ...}

....
FragmentTransaction ft = activity.getFragmentManager().beginTransaction();
Fragment3 newFragment = Fragment3.newInstance();
newFragment.show( ft, "dialog");
.... …