通用ImageLoader - 查看不能为空

-2

我想在ListView显示图标，我使用libs Universal Imageloader。但给我错误。请给我一个解决方案或编辑我的代码。通用ImageLoader - 查看不能为空

感谢您的帮助！

对不起，我英语不好。

代码段是

public class InfoTeacherFragment extends Fragment { 
    ProgressDialog pDialog; 
    Context mContext; 
    Vector<ArrayList<String>> data; 
    ArrayList<String> Name; 
    ArrayList<String> School; 
    ArrayList<String> Link; 
    ArrayList<String> Icon; 
    ListView lvItem; 
    DisplayImageOptions options; 

    public InfoTeacherFragment() { 
    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     options = new DisplayImageOptions.Builder() 
       .showImageOnLoading(R.drawable.ic_mission) 
       .showImageForEmptyUri(R.drawable.ic_empty) 
       .showImageOnFail(R.drawable.ic_error).cacheInMemory(true) 
       .cacheOnDisk(true).considerExifParams(true) 
       .bitmapConfig(Bitmap.Config.RGB_565).build(); 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 
     View rootView = inflater.inflate(R.layout.teacherinfo_layout, 
       container, false); 
     mContext = container.getContext(); 
     lvItem = (ListView) rootView.findViewById(R.id.lvTeacher); 
     if (Utils.isOnline(mContext) == true 
       && Utils.KEY_CHECK_SUCCESS.equals("SUCCESS")) { 
      new LoadData().execute(); 

      lvItem.setOnItemClickListener(new OnItemClickListener() { 

       @Override 
       public void onItemClick(AdapterView<?> adapter, View view, 
         int position, long id) { 

        Intent intent = new Intent(mContext, NewsItemView.class); 
        if (Link != null) { 
         intent.putExtra("URL", Link.get(position)); 
         startActivity(intent); 
        } 
       } 
      }); 
     } else if (Utils.isOnline(mContext) == true 
       && Utils.KEY_CHECK_SUCCESS.equals("FAIL")) { 
      Utils.MyToast(Utils.KEYWORK_ERROR[0], R.drawable.warning_icon, 
        mContext, false); 
     } 
     return rootView; 
    } 

    @Override 
    public void onDestroy() { 
     super.onDestroy(); 
     AnimateFirstDisplayListener.displayedImages.clear(); 
    } 

    class LoadData extends AsyncTask<Void, Void, String> { 
     private String Url = "http://scv.udn.vn/dhdn/trdhsp/page/1"; 

     @Override 
     protected void onPreExecute() { 
      pDialog = ProgressDialog.show(mContext, "", Utils.KEYWORK_ERROR[2]); 
      data = new Vector<ArrayList<String>>(); 
      Name = new ArrayList<String>(); 
      School = new ArrayList<String>(); 
      Link = new ArrayList<String>(); 
      Icon = new ArrayList<String>(); 
      super.onPreExecute(); 
     } 

     @Override 
     protected String doInBackground(Void... params) { 
      data = Utils.getInformationTeacher(Url); 
      if (!(data.isEmpty())) { 
       return Utils.KEY_CHECK_SUCCESS; 
      } else { 
       return Utils.KEY_CHECK_FAIL; 
      } 
     } 

     @Override 
     protected void onPostExecute(String result) { 
      if (result.equals(Utils.KEY_CHECK_SUCCESS)) { 
       pDialog.dismiss(); 
       Name = data.get(0); 
       School = data.get(1); 
       Icon = data.get(2); 
       Link = data.get(3); 
       ((ListView) lvItem).setAdapter(new InfoTeacher(mContext, Name, 
         School, Icon)); 
      } else if (result.equals(Utils.KEY_CHECK_FAIL)) { 
       pDialog.dismiss(); 
       Utils.MyToast(Utils.KEYWORK_ERROR[0], R.drawable.warning_icon, 
         mContext, false); 
      } 
      super.onPostExecute(result); 
     } 
    } 

    class InfoTeacher extends BaseAdapter { 
     private Context context; 
     private ArrayList<String> Icon = new ArrayList<String>(); 
     private ArrayList<String> Name = new ArrayList<String>(); 
     private ArrayList<String> School = new ArrayList<String>(); 
     private LayoutInflater inflater; 
     ImageLoadingListener animateFirstListener = new AnimateFirstDisplayListener(); 

     public InfoTeacher(Context context, ArrayList<String> Name, 
       ArrayList<String> School, ArrayList<String> Icon) { 
      this.context = context; 
      this.Name = Name; 
      this.Icon = Icon; 
      this.School = School; 
      inflater = LayoutInflater.from(getActivity()); 
     } 

     @Override 
     public int getCount() { 
      return Name.size(); 
     } 

     @Override 
     public Object getItem(int position) { 
      return position; 
     } 

     @Override 
     public long getItemId(int position) { 
      return position; 
     } 

     @Override 
     public View getView(int position, View view, ViewGroup arg2) { 
      View rowView = view; 
      ViewHolder holder; 
      if (rowView == null) { 
       holder = new ViewHolder(); 
       // inflater = (LayoutInflater) context 
       // .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
       rowView = inflater.inflate(R.layout.teacher_layout, null); 
       holder.Name = (TextView) rowView 
         .findViewById(R.id.tv_NameTeacher); 
       holder.School = (TextView) rowView.findViewById(R.id.tv_School); 
       holder.ic_naviga = (ImageView) rowView 
         .findViewById(R.id.ivNaviga); 
       holder.icon = (ImageView) rowView 
         .findViewById(R.id.iv_IconTeacher); 
       rowView.setTag(holder); 
      } else 
       holder = (ViewHolder) view.getTag(); 
      final String mIcon = Icon.get(position); 
      holder.Name.setText(Name.get(position).toString()); 
      holder.School.setText(School.get(position).toString()); 
      ImageLoader.getInstance().displayImage(mIcon, holder.icon, options, 
        animateFirstListener); 
      return rowView; 
     } 

    } 

    static class ViewHolder { 
     ImageView icon; 
     TextView Name; 
     TextView School; 
     ImageView ic_naviga; 
    } 

    private static class AnimateFirstDisplayListener extends 
      SimpleImageLoadingListener { 

     static final List<String> displayedImages = Collections 
       .synchronizedList(new LinkedList<String>()); 

     @Override 
     public void onLoadingComplete(String imageUri, View view, 
       Bitmap loadedImage) { 
      if (loadedImage != null) { 
       ImageView imageView = (ImageView) view; 
       boolean firstDisplay = !displayedImages.contains(imageUri); 
       if (firstDisplay) { 
        FadeInBitmapDisplayer.animate(imageView, 500); 
        displayedImages.add(imageUri); 
       } 
      } 
     } 
    } 
    }

和错误

12-29 07:54:34.400: E/AndroidRuntime(7687): FATAL EXCEPTION: main 
12-29 07:54:34.400: E/AndroidRuntime(7687): java.lang.IllegalArgumentException: view must not be null 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at com.nostra13.universalimageloader.core.imageaware.ViewAware.<init>(ViewAware.java:70) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at com.nostra13.universalimageloader.core.imageaware.ViewAware.<init>(ViewAware.java:50) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at com.nostra13.universalimageloader.core.imageaware.ImageViewAware.<init>(ImageViewAware.java:44) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at com.nostra13.universalimageloader.core.ImageLoader.displayImage(ImageLoader.java:365) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at com.nostra13.universalimageloader.core.ImageLoader.displayImage(ImageLoader.java:340) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.readnews.main.InfoTeacherFragment$InfoTeacher.getView(InfoTeacherFragment.java:196) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.AbsListView.obtainView(AbsListView.java:2159) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.ListView.makeAndAddView(ListView.java:1831) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.ListView.fillDown(ListView.java:674) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.ListView.fillFromTop(ListView.java:735) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.ListView.layoutChildren(ListView.java:1652) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.AbsListView.onLayout(AbsListView.java:1994) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.View.layout(View.java:14008) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewGroup.layout(ViewGroup.java:4373) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1021) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.View.layout(View.java:14008) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewGroup.layout(ViewGroup.java:4373) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.View.layout(View.java:14008) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewGroup.layout(ViewGroup.java:4373) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:678) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.View.layout(View.java:14008) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewGroup.layout(ViewGroup.java:4373) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.View.layout(View.java:14008) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewGroup.layout(ViewGroup.java:4373) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1663) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1521) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.LinearLayout.onLayout(LinearLayout.java:1434) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.View.layout(View.java:14008) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewGroup.layout(ViewGroup.java:4373) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.widget.FrameLayout.onLayout(FrameLayout.java:448) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.View.layout(View.java:14008) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewGroup.layout(ViewGroup.java:4373) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1892) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1711) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.Choreographer.doCallbacks(Choreographer.java:562) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.Choreographer.doFrame(Choreographer.java:532) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.os.Handler.handleCallback(Handler.java:725) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.os.Handler.dispatchMessage(Handler.java:92) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.os.Looper.loop(Looper.java:137) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at android.app.ActivityThread.main(ActivityThread.java:5041) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at java.lang.reflect.Method.invokeNative(Native Method) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at java.lang.reflect.Method.invoke(Method.java:511) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
12-29 07:54:34.400: E/AndroidRuntime(7687):  at dalvik.system.NativeStart.main(Native Method)

行代码错误：

ImageLoader.getInstance().displayImage(mIcon, holder.icon, options, 
         animateFirstListener);

来源

2014-12-29 Iris Louis

后'teacher_layout' – mmlooloo

'holder.icon'为空，检查 –

韩国社交协会的ID @shayanpourvatan我笨:( –

您还没有初始化ImageLoader。

在适配器中显示的图像之前添加以下代码：

ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context).build(); 
ImageLoader.getInstance().init(config);

来源

2014-12-29 08:31:48 max59

通用ImageLoader - 查看不能为空

回答

相关问题