我对微调器下拉列表和更改方向有疑问。

在我的 Activity 中，我显示了一个对话框，其中有两个微调器。当对话框显示给用户并且用户更改屏幕方向时，一切正常——在我的 onPause 中，我只是简单地关闭对话框。

如果用户点击微调器，则会在更改方向之前向用户显示一个下拉列表。但是，当用户未从下拉列表中选择任何内容，只是在更改方向之前展开列表时，我遇到了一个错误。

我已经尝试了很多方法来解决这个问题(即 onSaveInstanceState() 中的 spinner.setSelection(0) 等)。我的想法是在用户未选择项目并且发生方向更改时从代码中关闭下拉列表。

错误是关于Android.WindowLeaked:

E/WindowManager( 2455): Activity pl.myapp.WebViewActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@45041e60 that was originally added here
E/WindowManager( 2455): android.view.WindowLeaked: Activity pl.myapp.WebViewActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@45041e60 that was originally added here
E/WindowManager( 2455):     at android.view.ViewRoot.<init>(ViewRoot.java:247)
E/WindowManager( 2455):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
E/WindowManager( 2455):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
E/WindowManager( 2455):     at android.view.Window$LocalWindowManager.addView(Window.java:424)
E/WindowManager( 2455):     at android.app.Dialog.show(Dialog.java:241)
E/WindowManager( 2455):     at android.app.AlertDialog$Builder.show(AlertDialog.java:802)
E/WindowManager( 2455):     at android.widget.Spinner.performClick(Spinner.java:257)
E/WindowManager( 2455):     at android.view.View$PerformClick.run(View.java:8816)
E/WindowManager( 2455):     at android.os.Handler.handleCallback(Handler.java:587)
E/WindowManager( 2455):     at android.os.Handler.dispatchMessage(Handler.java:92)
E/WindowManager( 2455):     at android.os.Looper.loop(Looper.java:123)
E/WindowManager( 2455):     at android.app.ActivityThread.main(ActivityThread.java:4627)
E/WindowManager( 2455):     at java.lang.reflect.Method.invokeNative(Native Method)
E/WindowManager( 2455):     at java.lang.reflect.Method.invoke(Method.java:521)
E/WindowManager( 2455):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/WindowManager( 2455):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/WindowManager( 2455):     at dalvik.system.NativeStart.main(Native Method)

另外，出现这个错误:

D/AndroidRuntime( 2455): Shutting down VM
W/dalvikvm( 2455): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
E/AndroidRuntime( 2455): FATAL EXCEPTION: main
E/AndroidRuntime( 2455): java.lang.IllegalArgumentException: View not attached to window manager
E/AndroidRuntime( 2455):    at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:355)
E/AndroidRuntime( 2455):    at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:200)
E/AndroidRuntime( 2455):    at android.view.Window$LocalWindowManager.removeView(Window.java:432)
E/AndroidRuntime( 2455):    at android.app.Dialog.dismissDialog(Dialog.java:278)
E/AndroidRuntime( 2455):    at android.app.Dialog.access$000(Dialog.java:71)
E/AndroidRuntime( 2455):    at android.app.Dialog$1.run(Dialog.java:111)
E/AndroidRuntime( 2455):    at android.app.Dialog.dismiss(Dialog.java:268)
E/AndroidRuntime( 2455):    at android.widget.Spinner.onDetachedFromWindow(Spinner.java:86)
E/AndroidRuntime( 2455):    at android.view.View.dispatchDetachedFromWindow(View.java:6033)
E/AndroidRuntime( 2455):    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1158)
E/AndroidRuntime( 2455):    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156)
E/AndroidRuntime( 2455):    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156)
E/AndroidRuntime( 2455):    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156)
E/AndroidRuntime( 2455):    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156)
E/AndroidRuntime( 2455):    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156)
E/AndroidRuntime( 2455):    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156)
E/AndroidRuntime( 2455):    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1156)
E/AndroidRuntime( 2455):    at android.view.ViewRoot.dispatchDetachedFromWindow(ViewRoot.java:1630)
E/AndroidRuntime( 2455):    at android.view.ViewRoot.doDie(ViewRoot.java:2671)
E/AndroidRuntime( 2455):    at android.view.ViewRoot.handleMessage(ViewRoot.java:1948)
E/AndroidRuntime( 2455):    at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 2455):    at android.os.Looper.loop(Looper.java:123)
E/AndroidRuntime( 2455):    at android.app.ActivityThread.main(ActivityThread.java:4627)
E/AndroidRuntime( 2455):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 2455):    at java.lang.reflect.Method.invoke(Method.java:521)
E/AndroidRuntime( 2455):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
E/AndroidRuntime( 2455):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
E/AndroidRuntime( 2455):    at dalvik.system.NativeStart.main(Native Method)

编辑

解决方案:

最后我找到了导致这个 *&#$% 错误的原因。在我的 Activity list 中我有 android:configChanges="orientation"，当我将其更改为 android:configChanges="keyboardHidden|orientation"时，问题就消失了!

谢谢 4 的帮助!

最佳答案

我有一个 idea to prevent orientation changes当显示带有微调器的对话框时，发现 there is no reliable way to do that .我找到的最佳解决方案是 replace spinner with a button .

关于android - Spinner下拉列表和屏幕方向改变问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5233741/