Few little fragment, wm tweaks.

Deal with fragments being restored when their containing view is
gone.

Try to put in a black background during rotation.  Currently commented
out because it appears to cause surface flinger to hang.

Change-Id: I150d061e64488356d17513f4e2d124d7c3d04f6b

2 files changed, 5 insertions, 1 deletions

diff --git a/core/java/android/app/Fragment.java b/core/java/android/app/Fragment.java
index a920814..3141423 100644
--- a/core/java/android/app/Fragment.java
+++ b/core/java/android/app/Fragment.java
@@ -98,6 +98,7 @@ final class FragmentState implements Parcelable {
         }
         mInstance.setIndex(mIndex);
         mInstance.mFromLayout = mFromLayout;
+        mInstance.mRestored = true;
         mInstance.mFragmentId = mFragmentId;
         mInstance.mContainerId = mContainerId;
         mInstance.mTag = mTag;
@@ -363,6 +364,9 @@ public class Fragment implements ComponentCallbacks, OnCreateContextMenuListener
     // Set to true when the view has actually been inflated in its layout.
     boolean mInLayout;
 
+    // True if this fragment has been restored from previously saved state.
+    boolean mRestored;
+    
     // Number of active back stack entries this fragment is in.
     int mBackStackNesting;
     
diff --git a/core/java/android/app/FragmentManager.java b/core/java/android/app/FragmentManager.java
index 3c98d67..2609c46 100644
--- a/core/java/android/app/FragmentManager.java
+++ b/core/java/android/app/FragmentManager.java
@@ -690,7 +690,7 @@ final class FragmentManagerImpl extends FragmentManager {
                             ViewGroup container = null;
                             if (f.mContainerId != 0) {
                                 container = (ViewGroup)mActivity.findViewById(f.mContainerId);
-                                if (container == null) {
+                                if (container == null && !f.mRestored) {
                                     throw new IllegalArgumentException("No view found for id 0x"
                                             + Integer.toHexString(f.mContainerId)
                                             + " for fragment " + f);