commit 05ed14f5c36546bd171efdd99282c19231289669
author Clara Bayarri <clarabayarri@google.com> Fri Jun 24 12:31:34 2016 +0100
committer Clara Bayarri <clarabayarri@google.com> Fri Jun 24 12:31:34 2016 +0100
tree 59ac343d7e72dcefca0639c0aa3e136ce0d2bbaa
parent c4aabf74968c45051bf4b7f6fa75825b1c2847b9

Improve Exception message for adding private fragments

State which fragment is the culprit

Bug: 29565251
Change-Id: If16d59932297840ee0c71261b39527a1b2eb5f3e

fragment/java/android/support/v4/app/BackStackRecord.java

diff --git a/fragment/java/android/support/v4/app/BackStackRecord.java b/fragment/java/android/support/v4/app/BackStackRecord.java
index c5c8ce7..042cf9d 100644
--- a/fragment/java/android/support/v4/app/BackStackRecord.java
+++ b/fragment/java/android/support/v4/app/BackStackRecord.java
@@ -432,8 +432,9 @@
         final int modifiers = fragmentClass.getModifiers();
         if (fragmentClass.isAnonymousClass() || !Modifier.isPublic(modifiers)
                 || (fragmentClass.isMemberClass() && !Modifier.isStatic(modifiers))) {
-            throw new IllegalStateException("Fragment must be a public static class to be properly "
-                    + "recreated on configuration change.");
+            throw new IllegalStateException("Fragment " + fragmentClass.getCanonicalName()
+                    + " must be a public static class to be  properly recreated from"
+                    + " instance state.");
         }
 
         fragment.mFragmentManager = mManager;