使用nostra13 universalimageloader时，某些图像未加载到GridView中？并且url变形，如下面的logcat所示（％20％20在一些url之后添加）：
http://www.XXXXXXXXXXXXXXXXXX.com/waller/WALLPAPER/URL_THUMB/0.jpg%20%20
java.io.FileNotFoundException: http://www.XXXXXXXXXXXXXXXXXX.com/waller/WALLPAPER/URL_THUMB/0.jpg%20%20
at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getInputStream
com.nostra13.universalimageloader.core.download.URLConnectionImageDownloader.getStreamFromNetwork
at com.nostra13.universalimageloader.core.download.ImageDownloader.getStream
at com.nostra13.universalimageloader.core.LoadAndDisplayImageTask.saveImageOnDisc
at com.nostra13.universalimageloader.core.LoadAndDisplayImageTask.tryLoadBitmap(LoadAndDisplayImageTask.java:204)
at com.nostra13.universalimageloader.core.LoadAndDisplayImageTask.run
at java.util.concurrent.Executors$RunnableAdapter.call
java.util.concurrent.FutureTask$Sync.innerRun
at java.util.concurrent.FutureTask.run
at java.util.concurrent.ThreadPoolExecutor.runWorker
at java.util.concurrent.ThreadPoolExecutor$Worker.run
at java.lang.Thread.run
http://www.messina-test.com/waller/WALLPAPER/URL_THUMB/0.jpg%20%20
java.io.FileNotFoundException: http://www.messina-test.com/waller/WALLPAPER/URL_THUMB/0.jpg%20%20
at org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getInputStream
at com.nostra13.universalimageloader.core.download.URLConnectionImageDownloader.getStreamFromNetwork
at com.nostra13.universalimageloader.core.download.ImageDownloader.getStream
at com.nostra13.universalimageloader.core.LoadAndDisplayImageTask.saveImageOnDisc
at com.nostra13.universalimageloader.core.LoadAndDisplayImageTask.tryLoadBitmap
at com.nostra13.universalimageloader.core.LoadAndDisplayImageTask.run
at java.util.concurrent.Executors$RunnableAdapter.call
at java.util.concurrent.FutureTask$Sync.innerRun
at java.util.concurrent.FutureTask.run