Error from inside the Android tools, check the console

D:\Android-Sdk\tools\ant\build.xml:820: The following error occurred while executing this line:
D:\Android-Sdk\tools\ant\build.xml:831: The following error occurred while executing this line:
D:\Android-Sdk\tools\ant\build.xml:285: com.android.sdklib.build.ApkCreationException: Debug Certificate expired on 11-12-2 上午1:01
 at com.android.sdklib.build.ApkBuilder.getDebugKey(ApkBuilder.java:277)
 at com.android.sdklib.build.ApkBuilder.<init>(ApkBuilder.java:384)
 at com.android.ant.ApkBuilderTask.execute(ApkBuilderTask.java:333)
 at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
 at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
 at org.apache.tools.ant.Task.perform(Task.java:348)
 at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68)
 at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
 at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
 at org.apache.tools.ant.Task.perform(Task.java:348)
 at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:398)
 at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
 at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
 at org.apache.tools.ant.Task.perform(Task.java:348)
 at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68)
 at com.android.ant.IfElseTask.execute(IfElseTask.java:124)
 at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
 at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
 at org.apache.tools.ant.Task.perform(Task.java:348)
 at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68)
 at com.android.ant.IfElseTask.execute(IfElseTask.java:124)
 at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
 at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
 at org.apache.tools.ant.Task.perform(Task.java:348)
 at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68)
 at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
 at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
 at org.apache.tools.ant.Task.perform(Task.java:348)
 at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:398)
 at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
 at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
 at java.lang.reflect.Method.invoke(Method.java:597)
 at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
 at org.apache.tools.ant.Task.perform(Task.java:348)
 at org.apache.tools.ant.Target.execute(Target.java:390)
 at org.apache.tools.ant.Target.performTasks(Target.java:411)
 at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
 at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
 at processing.mode.android.AndroidBuild.antBuild(AndroidBuild.java:320)
 at processing.mode.android.AndroidBuild.build(AndroidBuild.java:73)
 at processing.mode.android.AndroidMode.handleRunEmulator(AndroidMode.java:146)
 at processing.mode.android.AndroidEditor$12.run(AndroidEditor.java:337)