指定的子级已具有父级。必须对子对象&x27；调用removeView（）；她先是父母。（C#）

我见过很多类似的问题，但到目前为止，我所看到的对我的问题没有帮助（主要是因为它是Java的，而我使用C#）

我试过这么做，但还是犯了同样的错误

builder.SetView(null);
builder.SetView(_imageView);

它所做的是从库中选择或添加图像后，将

Uri

添加到列表中（

ListView

）。单击该项目后，将在看到图像（

\u imageView

）的位置显示一个警报对话框。单击

取消

并在

从库中删除和添加另一个图像后查看
Uri
图像后，会发生此错误

我看到的所有解决方案都使用了充气，我真的不知道如何在代码中加入充气，因为imageview依赖于动态值（从gallery导入的图像）

请注意，我使用的是Xamarin Android

跟踪：

06-27 17:51:54.434 E/mono-rt (16678): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
06-27 17:51:54.434 E/mono-rt (16678):   at android.view.ViewGroup.addViewInner(ViewGroup.java:3430)
06-27 17:51:54.434 E/mono-rt (16678):   at android.view.ViewGroup.addView(ViewGroup.java:3301)
06-27 17:51:54.434 E/mono-rt (16678):   at android.view.ViewGroup.addView(ViewGroup.java:3277)
06-27 17:51:54.434 E/mono-rt (16678):   at com.android.internal.app.AlertController.setupView(AlertController.java:416)
06-27 17:51:54.434 E/mono-rt (16678):   at com.android.internal.app.AlertController.installContent(AlertController.java:244)
06-27 17:51:54.434 E/mono-rt (16678):   at android.app.AlertDialog.onCreate(AlertDialog.java:337)
06-27 17:51:54.434 E/mono-rt (16678):   at android.app.Dialog.dispatchOnCreate(Dialog.java:355)
06-27 17:51:54.434 E/mono-rt (16678):   at android.app.Dialog.show(Dialog.java:260)
06-27 17:51:54.434 E/mono-rt (16678):   at android.app.AlertDialog$Builder.show(AlertDialog.java:951)
06-27 17:51:54.434 E/mono-rt (16678):   at mono.android.widget.AdapterView_OnItemClickListenerImplementor.n_onItemClick(Native Method)
06-27 17:51:54.434 E/mono-rt (16678):   at mono.android.widget.AdapterView_OnItemClickListenerImplementor.onItemClick(AdapterView_OnItemClickListenerImplementor.java:29)
06-27 17:51:54.434 E/mono-rt (16678):   at android.widget.AdapterView.performItemClick(AdapterView.java:298)
06-27 17:51:54.434 E/mono-rt (16678):   at android.widget.AbsListView.performItemClick(AbsListView.java:1128)
06-27 17:51:54.434 E/mono-rt (16678):   at android.widget.AbsListView$PerformClick.run(AbsListView.java:2815)
06-27 17:51:54.434 E/mono-rt (16678):   at android.widget.AbsListView$1.run(AbsListView.java:3574)
06-27 17:51:54.434 E/mono-rt (16678):   at android.os.Handler.handleCallback(Handler.java:800)
06-27 17:51:54.434 E/mono-rt (16678):   at android.os.Handler.dispatchMessage(Handler.java:100)
06-27 17:51:54.434 E/mono-rt (16678):   at android.os.Looper.loop(Looper.java:194)
06-27 17:51:54.434 E/mono-rt (16678):   at android.app.ActivityThread.main(ActivityThread.java:5371)
06-27 17:51:54.434 E/mono-rt (16678):   at java.lang.reflect.Method.invokeNative(Native Method)
06-27 17:51:54.434 E/mono-rt (16678):   at java.lang.reflect.Method.invoke(Method.java:525)
06-27 17:51:54.434 E/mono-rt (16678):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
06-27 17:51:54.434 E/mono-rt (16678):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
06-27 17:51:54.434 E/mono-rt (16678):   at dalvik.system.NativeStart.main(Native Method)

TLDR

我在WPF中遇到了类似的问题。我如何解决它的步骤（代码是针对WPF的，API在XAMARIN中可能不同）：

获取我需要的孩子的参考资料。
Grid contentGrid=page.contentGrid

让孩子离开父母（有点悲哀）。在我的例子中，父网格是一个名为
MainGrid
：
page.MainGrid.Children.Remove（contentGrid）的网格

在您的例子中，
Children
集合的
Remove（）
方法被称为
RemoveView（）
，因为它们调用控件“视图”，这是我个人所不喜欢的。
图像视图已经分配给父视图创建一个新的图像视图并进行设置

  AlertDialog.Builder builder = new AlertDialog.Builder(this);
                 builder.SetTitle("Preview");  
 var temp= new ImageView(this);   
temp.SetImageBitmap(App.bm);                   
                 builder.SetView(temp);
                 builder.SetCancelable(false);
                 builder.SetPositiveButton("Cancel", (senderAlert, args) => { });
                 builder.SetNegativeButton("Delete?", (senderAlert, args) =>
                 {

                     Java.Lang.Object toRemove = myFileListAdapter.GetItem(e.Position);
                     myFileListAdapter.Remove(toRemove);
                     myFileListAdapter.NotifyDataSetChanged();
                     setListViewHeightBasedOnChildren(listViewFiles);

                 });

                 builder.Show();
                };

你能把堆栈跟踪添加到你的答案中吗？@YumeYume我刚刚添加了。请检查。这似乎有效，我不再收到错误，但在添加另一个图像后，用于查看图像的对话框正在复制。例如，我添加了一张照片，然后我查看了它，删除后，我添加了另一张。当我查看它然后单击取消时，前面添加的图像的对话框就在那里。这让我很困惑。另一个问题是，当我添加许多照片时，当我逐个单击它时，最新添加的照片是对话框上唯一出现的照片。请使用-=解除事件处理程序的绑定，方法与使用+=添加的方式相同，并且在您删除该对话框时也会取消该对话框。很抱歉，回复太晚。我需要哪个事件处理程序来解除绑定？如下所示：
listViewFiles.ItemClick-=（对象发送者，ItemClickEventArgs e）
？似乎也没有关闭
AlertDialog.Builder
的选项？我是新手，希望您不要介意。listViewFiles.ItemClick+=ClickHandler；…}ClickHandler（对象发送者，ItemClickEventArgs e）{…}listViewFiles.ItemClick-=ClickHandler我真的不知道从哪里获取引用以及应该使用哪个父级。是
图像视图
还是
警报对话框
？
builder.SetView(null);
builder.SetView(_imageView);

06-27 17:51:54.434 E/mono-rt (16678): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
06-27 17:51:54.434 E/mono-rt (16678):   at android.view.ViewGroup.addViewInner(ViewGroup.java:3430)
06-27 17:51:54.434 E/mono-rt (16678):   at android.view.ViewGroup.addView(ViewGroup.java:3301)
06-27 17:51:54.434 E/mono-rt (16678):   at android.view.ViewGroup.addView(ViewGroup.java:3277)
06-27 17:51:54.434 E/mono-rt (16678):   at com.android.internal.app.AlertController.setupView(AlertController.java:416)
06-27 17:51:54.434 E/mono-rt (16678):   at com.android.internal.app.AlertController.installContent(AlertController.java:244)
06-27 17:51:54.434 E/mono-rt (16678):   at android.app.AlertDialog.onCreate(AlertDialog.java:337)
06-27 17:51:54.434 E/mono-rt (16678):   at android.app.Dialog.dispatchOnCreate(Dialog.java:355)
06-27 17:51:54.434 E/mono-rt (16678):   at android.app.Dialog.show(Dialog.java:260)
06-27 17:51:54.434 E/mono-rt (16678):   at android.app.AlertDialog$Builder.show(AlertDialog.java:951)
06-27 17:51:54.434 E/mono-rt (16678):   at mono.android.widget.AdapterView_OnItemClickListenerImplementor.n_onItemClick(Native Method)
06-27 17:51:54.434 E/mono-rt (16678):   at mono.android.widget.AdapterView_OnItemClickListenerImplementor.onItemClick(AdapterView_OnItemClickListenerImplementor.java:29)
06-27 17:51:54.434 E/mono-rt (16678):   at android.widget.AdapterView.performItemClick(AdapterView.java:298)
06-27 17:51:54.434 E/mono-rt (16678):   at android.widget.AbsListView.performItemClick(AbsListView.java:1128)
06-27 17:51:54.434 E/mono-rt (16678):   at android.widget.AbsListView$PerformClick.run(AbsListView.java:2815)
06-27 17:51:54.434 E/mono-rt (16678):   at android.widget.AbsListView$1.run(AbsListView.java:3574)
06-27 17:51:54.434 E/mono-rt (16678):   at android.os.Handler.handleCallback(Handler.java:800)
06-27 17:51:54.434 E/mono-rt (16678):   at android.os.Handler.dispatchMessage(Handler.java:100)
06-27 17:51:54.434 E/mono-rt (16678):   at android.os.Looper.loop(Looper.java:194)
06-27 17:51:54.434 E/mono-rt (16678):   at android.app.ActivityThread.main(ActivityThread.java:5371)
06-27 17:51:54.434 E/mono-rt (16678):   at java.lang.reflect.Method.invokeNative(Native Method)
06-27 17:51:54.434 E/mono-rt (16678):   at java.lang.reflect.Method.invoke(Method.java:525)
06-27 17:51:54.434 E/mono-rt (16678):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
06-27 17:51:54.434 E/mono-rt (16678):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
06-27 17:51:54.434 E/mono-rt (16678):   at dalvik.system.NativeStart.main(Native Method)

  AlertDialog.Builder builder = new AlertDialog.Builder(this);
                 builder.SetTitle("Preview");  
 var temp= new ImageView(this);   
temp.SetImageBitmap(App.bm);                   
                 builder.SetView(temp);
                 builder.SetCancelable(false);
                 builder.SetPositiveButton("Cancel", (senderAlert, args) => { });
                 builder.SetNegativeButton("Delete?", (senderAlert, args) =>
                 {

                     Java.Lang.Object toRemove = myFileListAdapter.GetItem(e.Position);
                     myFileListAdapter.Remove(toRemove);
                     myFileListAdapter.NotifyDataSetChanged();
                     setListViewHeightBasedOnChildren(listViewFiles);

                 });

                 builder.Show();
                };