在android中使用Google日历API检索提要

我正在使用下面的代码将google日历中的所有提要检索到我的应用程序中

 try{
        URL feedUrl = new    
        URL("https://www.google.com/calendar/feeds/mymailID/public/full");
        CalendarService myService = new CalendarService("exampleCo-exampleApp-1");
        myService.setUserCredentials("mymailID", "mymailIDpassword");

        // Send the request and receive the response:
        CalendarEventFeed myFeed = myService.getFeed(feedUrl, CalendarEventFeed.class);

        System.out.println("feed:"+myFeed);
        }
        catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ServiceException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
 }

我在运行应用程序时出现以下错误。我认为用户凭据有问题，因此我将日历公开并尝试运行，但仍然出现相同的错误。我浏览了一些解决方案，他们建议将gdata jar文件放入libs文件夹，但当我这样做时，我得到了一个dalvik错误，因为在android 4.0中，libs文件夹包含android-support-v4.jar，这会弹出一个错误，表示文件重复

   05-24 13:20:33.129: W/dalvikvm(274): Unable to resolve superclass of Lcom/google/gdata/client/calendar/CalendarService; (537)
05-24 13:20:33.129: W/dalvikvm(274): Link of class 'Lcom/google/gdata/client/calendar/CalendarService;' failed
05-24 13:20:33.139: E/dalvikvm(274): Could not find class 'com.google.gdata.client.calendar.CalendarService', referenced from method com.googlecalendar.googleapi.MainActivity.onCreate
05-24 13:20:33.139: W/dalvikvm(274): VFY: unable to resolve new-instance 546 (Lcom/google/gdata/client/calendar/CalendarService;) in Lcom/googlecalendar/googleapi/MainActivity;
05-24 13:20:33.139: D/dalvikvm(274): VFY: replacing opcode 0x22 at 0x000f
05-24 13:20:33.139: W/dalvikvm(274): VFY: unable to resolve exception class 717 (Lcom/google/gdata/util/ServiceException;)
05-24 13:20:33.139: W/dalvikvm(274): VFY: unable to find exception handler at addr 0x44
05-24 13:20:33.139: W/dalvikvm(274): VFY:  rejected Lcom/googlecalendar/googleapi/MainActivity;.onCreate (Landroid/os/Bundle;)V
05-24 13:20:33.139: W/dalvikvm(274): VFY:  rejecting opcode 0x0d at 0x0044
05-24 13:20:33.139: W/dalvikvm(274): VFY:  rejected Lcom/googlecalendar/googleapi/MainActivity;.onCreate (Landroid/os/Bundle;)V
05-24 13:20:33.139: W/dalvikvm(274): Verifier rejected class Lcom/googlecalendar/googleapi/MainActivity;
05-24 13:20:33.139: W/dalvikvm(274): Class init failed in newInstance call (Lcom/googlecalendar/googleapi/MainActivity;)
05-24 13:20:33.139: D/AndroidRuntime(274): Shutting down VM
05-24 13:20:33.139: W/dalvikvm(274): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-24 13:20:33.169: E/AndroidRuntime(274): FATAL EXCEPTION: main
05-24 13:20:33.169: E/AndroidRuntime(274): java.lang.VerifyError: com.googlecalendar.googleapi.MainActivity
05-24 13:20:33.169: E/AndroidRuntime(274):  at java.lang.Class.newInstanceImpl(Native Method)
05-24 13:20:33.169: E/AndroidRuntime(274):  at java.lang.Class.newInstance(Class.java:1429)
05-24 13:20:33.169: E/AndroidRuntime(274):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
05-24 13:20:33.169: E/AndroidRuntime(274):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
05-24 13:20:33.169: E/AndroidRuntime(274):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
05-24 13:20:33.169: E/AndroidRuntime(274):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
05-24 13:20:33.169: E/AndroidRuntime(274):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
05-24 13:20:33.169: E/AndroidRuntime(274):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-24 13:20:33.169: E/AndroidRuntime(274):  at android.os.Looper.loop(Looper.java:123)
05-24 13:20:33.169: E/AndroidRuntime(274):  at android.app.ActivityThread.main(ActivityThread.java:4627)
05-24 13:20:33.169: E/AndroidRuntime(274):  at java.lang.reflect.Method.invokeNative(Native Method)
05-24 13:20:33.169: E/AndroidRuntime(274):  at java.lang.reflect.Method.invoke(Method.java:521)
05-24 13:20:33.169: E/AndroidRuntime(274):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-24 13:20:33.169: E/AndroidRuntime(274):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-24 13:20:33.169: E/AndroidRuntime(274):  at dalvik.system.NativeStart.main(Native Method)
05-24 13:20:36.480: I/Process(274): Sending signal. PID: 274 SIG: 9
05-24 13:25:02.579: W/dalvikvm(305): Unable to resolve superclass of Lcom/google/gdata/client/calendar/CalendarService; (537)
05-24 13:25:02.579: W/dalvikvm(305): Link of class 'Lcom/google/gdata/client/calendar/CalendarService;' failed
05-24 13:25:02.599: E/dalvikvm(305): Could not find class 'com.google.gdata.client.calendar.CalendarService', referenced from method com.googlecalendar.googleapi.MainActivity.onCreate
05-24 13:25:02.599: W/dalvikvm(305): VFY: unable to resolve new-instance 546 (Lcom/google/gdata/client/calendar/CalendarService;) in Lcom/googlecalendar/googleapi/MainActivity;
05-24 13:25:02.609: D/dalvikvm(305): VFY: replacing opcode 0x22 at 0x000f
05-24 13:25:02.639: W/dalvikvm(305): VFY: unable to resolve exception class 717 (Lcom/google/gdata/util/ServiceException;)
05-24 13:25:02.639: W/dalvikvm(305): VFY: unable to find exception handler at addr 0x44
05-24 13:25:02.649: W/dalvikvm(305): VFY:  rejected Lcom/googlecalendar/googleapi/MainActivity;.onCreate (Landroid/os/Bundle;)V
05-24 13:25:02.649: W/dalvikvm(305): VFY:  rejecting opcode 0x0d at 0x0044
05-24 13:25:02.649: W/dalvikvm(305): VFY:  rejected Lcom/googlecalendar/googleapi/MainActivity;.onCreate (Landroid/os/Bundle;)V
05-24 13:25:02.649: W/dalvikvm(305): Verifier rejected class Lcom/googlecalendar/googleapi/MainActivity;
05-24 13:25:02.649: W/dalvikvm(305): Class init failed in newInstance call (Lcom/googlecalendar/googleapi/MainActivity;)
05-24 13:25:02.649: D/AndroidRuntime(305): Shutting down VM
05-24 13:25:02.649: W/dalvikvm(305): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-24 13:25:02.709: E/AndroidRuntime(305): FATAL EXCEPTION: main
05-24 13:25:02.709: E/AndroidRuntime(305): java.lang.VerifyError: com.googlecalendar.googleapi.MainActivity
05-24 13:25:02.709: E/AndroidRuntime(305):  at java.lang.Class.newInstanceImpl(Native Method)
05-24 13:25:02.709: E/AndroidRuntime(305):  at java.lang.Class.newInstance(Class.java:1429)
05-24 13:25:02.709: E/AndroidRuntime(305):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
05-24 13:25:02.709: E/AndroidRuntime(305):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
05-24 13:25:02.709: E/AndroidRuntime(305):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
05-24 13:25:02.709: E/AndroidRuntime(305):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
05-24 13:25:02.709: E/AndroidRuntime(305):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
05-24 13:25:02.709: E/AndroidRuntime(305):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-24 13:25:02.709: E/AndroidRuntime(305):  at android.os.Looper.loop(Looper.java:123)
05-24 13:25:02.709: E/AndroidRuntime(305):  at android.app.ActivityThread.main(ActivityThread.java:4627)
05-24 13:25:02.709: E/AndroidRuntime(305):  at java.lang.reflect.Method.invokeNative(Native Method)
05-24 13:25:02.709: E/AndroidRuntime(305):  at java.lang.reflect.Method.invoke(Method.java:521)
05-24 13:25:02.709: E/AndroidRuntime(305):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-24 13:25:02.709: E/AndroidRuntime(305):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-24 13:25:02.709: E/AndroidRuntime(305):  at dalvik.system.NativeStart.main(Native Method)
05-24 13:25:05.190: I/Process(305): Sending signal. PID: 305 SIG: 9

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我似乎没有得到任何人的回应？我想知道为什么？这个帖子完全无效吗？或者没人知道我的问题的解决方案？