ImageLoader不可用

Question

我想從libs-for-android（http://code.google.com/p/libs-for-android/）中使用ImageLoader類，並且得到以下異常：

java.lang.IllegalStateException: ImageLoader not available 
    579   AndroidRuntime E at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 
    579   AndroidRuntime E at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 
    579   AndroidRuntime E at android.app.ActivityThread.access$1500(ActivityThread.java:117) 
    579   AndroidRuntime E at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 
    579   AndroidRuntime E at android.os.Handler.dispatchMessage(Handler.java:99) 
    579   AndroidRuntime E at android.os.Looper.loop(Looper.java:123) 
    579   AndroidRuntime E at android.app.ActivityThread.main(ActivityThread.java:3683) 
    579   AndroidRuntime E at java.lang.reflect.Method.invokeNative(Native Method) 
    579   AndroidRuntime E at java.lang.reflect.Method.invoke(Method.java:507) 
    579   AndroidRuntime E at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839 
           ) 
    579   AndroidRuntime E at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 
    579   AndroidRuntime E at dalvik.system.NativeStart.main(Native Method) 
    579   AndroidRuntime E Caused by: java.lang.IllegalStateException: ImageLoader not available 
    579   AndroidRuntime E at com.google.android.imageloader.ImageLoader.get(ImageLoader.java:103) 

（有我下面作爲一個例子在其網站上演示應用程序上面鏈接：http://code.google.com/p/libs-for-android/source/browse/demos/jamendo/src/com/google/android/demos/jamendo/widget/AlbumGalleryAdapter.java）

我試圖用一個PagerAdapter內的ImageLoader的，這裏是有關的代碼（它是綁定語句多數民衆贊成在導致異常）：

public FeaturedImagePagerAdapter(Context context, ArrayList<JSONObject> images) { 
     this.cxt = context; 
     mImages = images; 
     mLoader = ImageLoader.get(this.cxt); 
    } 

@Override 
    public Object instantiateItem(View collection, int position) { 
     LayoutInflater inflater = (LayoutInflater) cxt 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     LinearLayout featured_image_layout = (LinearLayout) inflater.inflate(R.layout.featured_image_item, null); 


     // code omitted from this area that does some setup with the layout above. 

     ImageView image = (ImageView) featured_image_layout.findViewById(R.id.featured_image); 

     try {   
      mLoader.bind(image, mImages.get(position).getString("url"), null); 
     } catch (JSONException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 



     return featured_image_layout; 
    } 

我不知道 - 也許ImageLoader類不適合在PagerAdapter中使用？

Answer 1

我使用ImageLoader，但沒有像那樣實例化它。我只是這樣做...

mImageLoader = new ImageLoader();