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當用戶點擊一個按鈕時,調用Acitiviy.ShowDialog(int)時出現NullReferenceException異常。 Android 2.1中發生異常,而Android 4.2中則不會。這裏是Stacktrace:在Android 2上調用ShowDialog時發生NullReferenceException異常
UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object
at (wrapper delegate-invoke) <Module>.invoke_void__this___intptr_intptr_intptr_JValue[] (intptr,intptr,intptr,Android.Runtime.JValue[]) <0x000b3>
at Android.Runtime.JNIEnv.CallVoidMethod (intptr,intptr,Android.Runtime.JValue[]) <0x00053>
at Android.App.Activity.ShowDialog (int) <0x0011f>
at MyApp.AndroidApp.InvoiceActivity.ShowScheduleDateDialog (object,System.EventArgs) <0x0003b>
at Android.Views.View/IOnClickListenerImplementor.OnClick (Android.Views.View) <0x00057>
at Android.Views.View/IOnClickListenerInvoker.n_OnClick_Landroid_view_View_ (intptr,intptr,intptr) <0x00063>
at (wrapper dynamic-method) object.be0dcca3-9ca4-47b4-a6a4-f691d34675f1 (intptr,intptr,intptr) <0x00043>
任何想法?
你應該發佈代碼本身,從這我們將無法幫助你。 – Gilson 2013-05-09 17:47:52