片段中的應用內計費

Question

我正在制作一個包含標簽內片段的應用程序。每當我嘗試調用應用程序內結算請求購買時，它都會給我下面粘貼的錯誤。

這是我在應用程序中調用片段的設計。

CalendarUIActivity (FragmentActivity) -> CalendarUIMain (Fragment) -> When the user ask for more then InAppSubsricbe (DialogFragment) -> On click of OK of above dialog another dialog fragment got open with list of In-App Products which InAppProductsList(DialogFragment)

現在，當我點擊 Dialog Fragment Edit it redirects it method to main CalendarUIMain Fragment at that time它給我錯誤（如下粘貼），市場購買屏幕成功打開。但是點擊購買屏幕的 OK 它消失了因為應用程序被強制關閉。

04-11 09:10:52.450: E/AndroidRuntime(1966): FATAL EXCEPTION: main
04-11 09:10:52.450: E/AndroidRuntime(1966): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.uks.android.epn.activity/com.uks.android.epn.activity.MainActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.uks.android.epn.activity/com.uks.android.epn.activity.CalendarUIActivity}: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.uks.android.epn.fragments.CalendarUIMain$InAppProductsDialog: make sure class name exists, is public, and has an empty constructor that is public
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1818)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1834)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3200)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.ActivityThread.access$600(ActivityThread.java:125)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1031)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.os.Handler.dispatchMessage(Handler.java:99)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.os.Looper.loop(Looper.java:132)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.ActivityThread.main(ActivityThread.java:4135)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at java.lang.reflect.Method.invokeNative(Native Method)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at java.lang.reflect.Method.invoke(Method.java:491)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at dalvik.system.NativeStart.main(Native Method)
04-11 09:10:52.450: E/AndroidRuntime(1966): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.uks.android.epn.activity/com.uks.android.epn.activity.CalendarUIActivity}: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.uks.android.epn.fragments.CalendarUIMain$InAppProductsDialog: make sure class name exists, is public, and has an empty constructor that is public
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1818)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.ActivityThread.startActivityNow(ActivityThread.java:1659)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:676)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.widget.TabHost.setCurrentTab(TabHost.java:345)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.widget.TabHost.addTab(TabHost.java:235)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at com.uks.android.epn.activity.MainActivity.addTab(MainActivity.java:78)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at com.uks.android.epn.activity.MainActivity.initTabs(MainActivity.java:45)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at com.uks.android.epn.activity.MainActivity.onCreate(MainActivity.java:35)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.Activity.performCreate(Activity.java:4397)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1782)
04-11 09:10:52.450: E/AndroidRuntime(1966):     ... 12 more
04-11 09:10:52.450: E/AndroidRuntime(1966): Caused by: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.uks.android.epn.fragments.CalendarUIMain$InAppProductsDialog: make sure class name exists, is public, and has an empty constructor that is public
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.support.v4.app.Fragment.instantiate(Fragment.java:395)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.support.v4.app.FragmentState.instantiate(Fragment.java:96)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.support.v4.app.FragmentManagerImpl.restoreAllState(FragmentManager.java:1726)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.support.v4.app.FragmentActivity.onCreate(FragmentActivity.java:198)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at com.uks.android.epn.activity.ActivitysTab.onCreate(ActivitysTab.java:25)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at com.uks.android.epn.activity.CalendarUIActivity.onCreate(CalendarUIActivity.java:23)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.Activity.performCreate(Activity.java:4397)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1782)
04-11 09:10:52.450: E/AndroidRuntime(1966):     ... 24 more
04-11 09:10:52.450: E/AndroidRuntime(1966): Caused by: java.lang.InstantiationException: com.uks.android.epn.fragments.CalendarUIMain$InAppProductsDialog
04-11 09:10:52.450: E/AndroidRuntime(1966):     at java.lang.Class.newInstanceImpl(Native Method)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at java.lang.Class.newInstance(Class.java:1301)
04-11 09:10:52.450: E/AndroidRuntime(1966):     at android.support.v4.app.Fragment.instantiate(Fragment.java:384)
04-11 09:10:52.450: E/AndroidRuntime(1966):     ... 32 more

現在請參考此鏈接以獲取代碼（因為代碼有點大）。 關聯

提前致謝。

Answer 1

顯示來自CalendarUIMain$InAppProductsDialog的相關代碼。 InAppProductsDialog是 static 內部 class 嗎？ 它有一個可訪問的默認構造函數嗎？

Answer 2

很抱歉打擾 Stacked Guys 給出答案，

這是一個簡單的問題，我發現片段沒有在屏幕方向上實例化，因為屏幕方向被鎖定為portrait 。所以每當我在平板電腦上測試該代碼時，Google Play 的屏幕就會進入橫向模式，這反過來會導致例外。

感謝@Nikolay Elenkov static inner class 的想法。