我正在尝试在我的应用中使用应用内购买流程。我使用来自http://developer.android.com/training/in-app-billing/preparing-iab-app.html（IabHelper等）的助手类。在我付款之前一切都很好。返回活动时，引发此异常
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null,
request=10001, result=-1, data=Intent { (has extras) }} to activity
{com.sunlight.mangomonitor/com.sunlight.mangomonitor.PurchaseActivity}:
java.lang.IllegalArgumentException: java.security.spec.InvalidKeySpecException:
java.lang.RuntimeException: error:0D07209B:asn1 encoding routines:ASN1_get_object:too long
at android.app.ActivityThread.deliverResults(ActivityThread.java:3408)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3451)
at android.app.ActivityThread.access$1200(ActivityThread.java:154)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1332)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5296)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalArgumentException: java.security.spec.InvalidKeySpecException:
java.lang.RuntimeException: error:0D07209B:asn1 encoding routines:ASN1_get_object:too long
at com.sunlight.mangomonitor.util.Security.generatePublicKey(Security.java:92)
at com.sunlight.mangomonitor.util.Security.verifyPurchase(Security.java:66)
at com.sunlight.mangomonitor.util.IabHelper.handleActivityResult(IabHelper.java:460)
at com.sunlight.mangomonitor.PurchaseActivity.onActivityResult(PurchaseActivity.java:145)
at android.app.Activity.dispatchActivityResult(Activity.java:5444)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3404)
... 11 more
Caused by: java.security.spec.InvalidKeySpecException: java.lang.RuntimeException:
error:0D07209B:asn1 encoding routines:ASN1_get_object:too long
at
org.apache.harmony.xnet.provider.jsse.OpenSSLRSAKeyFactory.engineGeneratePublic(OpenSSLRSAKeyF actory.java:52)
at java.security.KeyFactory.generatePublic(KeyFactory.java:171)
at com.sunlight.mangomonitor.util.Security.generatePublicKey(Security.java:87)
... 16 more
Caused by: java.lang.RuntimeException: error:0D07209B:asn1 encoding
routines:ASN1_get_object:too long
at org.apache.harmony.xnet.provider.jsse.NativeCrypto.d2i_PUBKEY(Native Method)
at org.apache.harmony.xnet.provider.jsse.OpenSSLRSAKeyFactory.engineGeneratePublic(OpenSSLRSAKeyfactory.java:48)
我发现开始购买的activity可能被破坏了，这种情况应该怎么办？有什么建议么？