我试图在第二个对话框上显示一个带有后退按钮的嵌套对话框，单击该对话框，用户将显示第一个对话框。我的代码如下：
public class FileOpenMenuDelegate {
AlertDialog.Builder fileOpenBuilderFolder = null;
AlertDialog fileOpenBuilderFolderDialog = null;
AlertDialog.Builder fileOpenBuilder = null;
AlertDialog fileOpenBuilderDialog = null;
public void setSelectedItem(int position) {
selectedItem = position;
}
public FileOpenMenuDelegate(Context context, View view) {
this.context = context;
this.view = view;
fileOpenBuilderFolder = new AlertDialog.Builder(context);
fileOpenBuilder = new AlertDialog.Builder(context);
}
public void fileOpenMenu() {
final CharSequence[] foldernames = getAllFolders();
if (foldernames == null) {
//Handle
} else {
LayoutInflater inflater = LayoutInflater.from(context);
View convertView = (View) inflater.inflate(R.layout.dialog_list_layout, null);
ListView lv = (ListView) convertView.findViewById(R.id.listExample);
selectedAdapter = new CustomAdapter(context, 0, Arrays.asList(foldernames));
lv.setAdapter(selectedAdapter);
fileOpenBuilderFolder.setTitle(FAC.OPEN_FOLDERS);
fileOpenBuilderFolder.setView(convertView);
selectedAdapter.setSelectedPosition(2);
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView arg0, View view,
int position, long id) {
fileOpenBuilderFolderDialog.dismiss();
selectedAdapter.setSelectedPosition(position - 1);
String selectedFolder = foldernames[position].toString();
//Sub window
final CharSequence[] allFiles = getAllFiles();
LayoutInflater inflater = LayoutInflater.from(context);
View convertView = (View) inflater.inflate(R.layout.dialog_list_layout, null);
ListView subListView = (ListView) convertView.findViewById(R.id.listExample);
fileOpenBuilder.setTitle("Test");
subMenuAdapter = new CustomAdapter(context, 0, Arrays.asList(allFiles));
subListView.setAdapter(subMenuAdapter);
fileOpenBuilder.setView(convertView);
subListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView arg0, View view,
int position, long id) {
fileOpenBuilderDialog.dismiss();
if (position == 0) {
fileOpenBuilderFolderDialog.dismiss();
fileOpenBuilderFolderDialog = fileOpenBuilderFolder.create();
fileOpenBuilderFolderDialog.show();************Error Line***************
}
}
});
fileOpenBuilderDialog = fileOpenBuilder.create();
fileOpenBuilderDialog.show();
}
});
}
fileOpenBuilderFolderDialog = fileOpenBuilderFolder.create();
fileOpenBuilderFolderDialog.show();
}
}
一切正常，除非我点击第二个警报中的第一个项目，我已经编写了再次显示第一个对话框的代码 - 这给了我错误“指定的孩子已经有父错误”。我究竟做错了什么 ？请帮忙。
异常日志::
02-17 12:38:59.250: E/AndroidRuntime(27702): FATAL EXCEPTION: main
02-17 12:38:59.250: E/AndroidRuntime(27702): java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.view.ViewGroup.addViewInner(ViewGroup.java:3672)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.view.ViewGroup.addView(ViewGroup.java:3543)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.view.ViewGroup.addView(ViewGroup.java:3519)
02-17 12:38:59.250: E/AndroidRuntime(27702): at com.android.internal.app.AlertController.setupView(AlertController.java:402)
02-17 12:38:59.250: E/AndroidRuntime(27702): at com.android.internal.app.AlertController.installContent(AlertController.java:242)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.app.AlertDialog.onCreate(AlertDialog.java:336)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.app.Dialog.dispatchOnCreate(Dialog.java:375)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.app.Dialog.show(Dialog.java:261)
02-17 12:38:59.250: E/AndroidRuntime(27702): at edu.delegates.FileOpenMenuDelegate$2$1.onItemClick(FileOpenMenuDelegate.java:196)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.widget.AdapterView.performItemClick(AdapterView.java:301)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.widget.AbsListView.performItemClick(AbsListView.java:1287)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.widget.AbsListView$PerformClick.run(AbsListView.java:3078)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.widget.AbsListView$1.run(AbsListView.java:4161)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.os.Handler.handleCallback(Handler.java:615)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.os.Handler.dispatchMessage(Handler.java:92)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.os.Looper.loop(Looper.java:137)
02-17 12:38:59.250: E/AndroidRuntime(27702): at android.app.ActivityThread.main(ActivityThread.java:4921)
02-17 12:38:59.250: E/AndroidRuntime(27702): at java.lang.reflect.Method.invokeNative(Native Method)
02-17 12:38:59.250: E/AndroidRuntime(27702): at java.lang.reflect.Method.invoke(Method.java:511)
02-17 12:38:59.250: E/AndroidRuntime(27702): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
02-17 12:38:59.250: E/AndroidRuntime(27702): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
02-17 12:38:59.250: E/AndroidRuntime(27702): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：2)
由于列表视图是第一个警报对话框的子项，因此出现错误。我用
修复了它((ViewGroup) mainListView.getParent()).removeView(mainListView);
在创建新对话框之前。这是解决问题的方法。
答案 1 :(得分：1)
您正在尝试添加已有父级的View。这是什么？
at edu.asu.fact.delegates
.FileOpenMenuDelegate$2$1
.onItemClick(FileOpenMenuDelegate.java:196)
修改
无需将AlertDialog和AlertDialog.Builder变量保留为类成员。尝试在每次需要时在本地创建它们。