v21 issue

When using your custom view and Robolectric framework, it will throw Inflate Exception

The issue identifies a failure involving a custom view and the Robolectric framework, but names no files, tests, versions, or reproduction steps. Start by locating the custom-view inflation path and reproducing the Inflate Exception under Robolectric; done means the reported scenario no longer throws the exception and has a regression test.

索引モデルが issue の本文から書いたものです。