Fixes #1933428. Call onPrepareDialog() on managed dialogs after their onCreate() is finished.

core/java/android/app/Activity.java

@@ -857,7 +857,7 @@ public class Activity extends ContextThemeWrapper
             if (dialogState != null) {
                 // Calling onRestoreInstanceState() below will invoke dispatchOnCreate
                 // so tell createDialog() not to do it, otherwise we get an exception
-                final Dialog dialog = createDialog(dialogId, false);
+                final Dialog dialog = createDialog(dialogId, dialogState);
                 mManagedDialogs.put(dialogId, dialog);
                 onPrepareDialog(dialogId, dialog);
                 dialog.onRestoreInstanceState(dialogState);
@@ -865,13 +865,13 @@ public class Activity extends ContextThemeWrapper
         }
     }
 
-    private Dialog createDialog(Integer dialogId, boolean dispatchOnCreate) {
+    private Dialog createDialog(Integer dialogId, Bundle state) {
         final Dialog dialog = onCreateDialog(dialogId);
         if (dialog == null) {
             throw new IllegalArgumentException("Activity#onCreateDialog did "
                     + "not create a dialog for id " + dialogId);
         }
-        if (dispatchOnCreate) dialog.dispatchOnCreate(null);
+        dialog.dispatchOnCreate(state);
         return dialog;
     }
 
@@ -2407,7 +2407,7 @@ public class Activity extends ContextThemeWrapper
         }
         Dialog dialog = mManagedDialogs.get(id);
         if (dialog == null) {
-            dialog = createDialog(id, true);
+            dialog = createDialog(id, null);
             mManagedDialogs.put(id, dialog);
         }
         

core/java/android/app/Dialog.java

@@ -292,9 +292,11 @@ public class Dialog implements DialogInterface, Window.Callback,
     // internal method to make sure mcreated is set properly without requiring
     // users to call through to super in onCreate
     void dispatchOnCreate(Bundle savedInstanceState) {
+        if (!mCreated) {
             onCreate(savedInstanceState);
             mCreated = true;
         }
+    }
 
     /**
      * Similar to {@link Activity#onCreate}, you should initialized your dialog