jdom库在那里，我已经删除并一次又一次地添加到构建路径。而且，我已多次清理该项目。但我仍然得到这个错误：
04-27 10:51:27.867: W/ActivityThread(530): Application com.pkg.src.nhs.glos is waiting for the debugger on port 8100...
04-27 10:51:27.936: I/System.out(530): Sending WAIT chunk
04-27 10:51:29.396: I/dalvikvm(530): Debugger is active
04-27 10:51:29.736: I/System.out(530): Debugger has connected
04-27 10:51:29.746: I/System.out(530): waiting for debugger to settle...
04-27 10:51:29.996: I/System.out(530): waiting for debugger to settle...
04-27 10:51:30.262: I/System.out(530): waiting for debugger to settle...
04-27 10:51:30.479: I/System.out(530): waiting for debugger to settle...
04-27 10:51:30.689: I/System.out(530): waiting for debugger to settle...
04-27 10:51:30.896: I/System.out(530): waiting for debugger to settle...
04-27 10:51:43.786: D/dalvikvm(553): GC freed 683 objects / 60040 bytes in 110ms
04-27 10:51:49.396: W/dalvikvm(553): VFY: unable to find class referenced in signature (Lcom/androidquery/AQuery;)
04-27 10:51:49.576: W/dalvikvm(553): VFY: unable to find class referenced in signature (Lcom/androidquery/util/XmlDom;)
04-27 10:51:49.646: W/dalvikvm(553): VFY: unable to find class referenced in signature (Lcom/androidquery/callback/AjaxStatus;)
04-27 10:51:49.646: I/dalvikvm(553): Could not find method com.androidquery.util.XmlDom.tags, referenced from method com.pkg.src.nhs.glos.MainActivity.setImageCallBack
04-27 10:51:49.646: W/dalvikvm(553): VFY: unable to resolve virtual method 80: Lcom/androidquery/util/XmlDom;.tags (Ljava/lang/String;)Ljava/util/List;
04-27 10:51:49.646: D/dalvikvm(553): VFY: replacing opcode 0x6e at 0x0013
04-27 10:51:49.646: D/dalvikvm(553): Making a copy of Lcom/pkg/src/nhs/glos/MainActivity;.setImageCallBack code (200 bytes)
04-27 10:51:50.126: E/dalvikvm(553): Could not find class 'org.jdom.input.SAXBuilder', referenced from method com.pkg.src.nhs.glos.MainActivity$SetImageTask.doInBackground
04-27 10:51:50.126: W/dalvikvm(553): VFY: unable to resolve new-instance 166 (Lorg/jdom/input/SAXBuilder;) in Lcom/pkg/src/nhs/glos/MainActivity$SetImageTask;
04-27 10:51:50.126: D/dalvikvm(553): VFY: replacing opcode 0x22 at 0x0009
04-27 10:51:50.126: D/dalvikvm(553): Making a copy of Lcom/pkg/src/nhs/glos/MainActivity$SetImageTask;.doInBackground code (205 bytes)
04-27 10:51:50.736: W/dalvikvm(553): threadid=15: thread exiting with uncaught exception (group=0x4001b188)
04-27 10:51:50.746: E/AndroidRuntime(553): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception
04-27 10:51:50.846: E/AndroidRuntime(553): java.lang.RuntimeException: An error occured while executing doInBackground()
04-27 10:51:50.846: E/AndroidRuntime(553): at android.os.AsyncTask$3.done(AsyncTask.java:200)
04-27 10:51:50.846: E/AndroidRuntime(553): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
04-27 10:51:50.846: E/AndroidRuntime(553): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
04-27 10:51:50.846: E/AndroidRuntime(553): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
04-27 10:51:50.846: E/AndroidRuntime(553): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
04-27 10:51:50.846: E/AndroidRuntime(553): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
04-27 10:51:50.846: E/AndroidRuntime(553): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
04-27 10:51:50.846: E/AndroidRuntime(553): at java.lang.Thread.run(Thread.java:1096)
04-27 10:51:50.846: E/AndroidRuntime(553): Caused by: java.lang.NoClassDefFoundError: org.jdom.input.SAXBuilder
04-27 10:51:50.846: E/AndroidRuntime(553): at com.pkg.src.nhs.glos.MainActivity$SetImageTask.doInBackground(MainActivity.java:100)
04-27 10:51:50.846: E/AndroidRuntime(553): at com.pkg.src.nhs.glos.MainActivity$SetImageTask.doInBackground(MainActivity.java:1)
04-27 10:51:50.846: E/AndroidRuntime(553): at android.os.AsyncTask$2.call(AsyncTask.java:185)
04-27 10:51:50.846: E/AndroidRuntime(553): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
04-27 10:51:50.846: E/AndroidRuntime(553): ... 4 more
04-27 10:51:50.941: I/dalvikvm(553): threadid=7: reacting to signal 3
04-27 10:51:50.941: E/dalvikvm(553): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
04-27 10:52:02.038: I/Process(553): Sending signal. PID: 553 SIG: 9
检查是否在构建路径设置的“订购和导出”选项卡中选中了jdom库。如果没有检查，请执行清理并重试运行您的应用程序。
在Android Studio中，它必须自动添加您添加到项目中“libs”文件夹的jar文件，但有时它不会这样做。所以你必须为Windows用户转到“项目结构”= ctrl + alt + shift + S.
然后单击面板左侧的“app”。然后单击“依赖关系”选项卡。然后单击（+） - > jar依赖项。然后在libs文件夹中选择你的jar文件。
然后单击确定。