Merge "Don\'t call .toString() on potentially null CharSequence" into nyc-dev

am: b182735757

* commit 'b182735757630db7e84e577c999b9e7d8a288353':
  Don't call .toString() on potentially null CharSequence

Change-Id: I7242f7f064f6695956a9b529f38c2ece82effbcb

core/java/android/content/res/ResourcesImpl.java

@@ -292,8 +292,10 @@ public class ResourcesImpl {
             return mAssets.openNonAsset(value.assetCookie, value.string.toString(),
                     AssetManager.ACCESS_STREAMING);
         } catch (Exception e) {
-            NotFoundException rnf = new NotFoundException("File " + value.string.toString() +
-                    " from drawable resource ID #0x" + Integer.toHexString(id));
+            // Note: value.string might be null
+            NotFoundException rnf = new NotFoundException("File "
+                    + (value.string == null ? "(null)" : value.string.toString())
+                    + " from drawable resource ID #0x" + Integer.toHexString(id));
             rnf.initCause(e);
             throw rnf;
         }