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https://issues.apache.org/jira/browse/FLEX-28793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13592082#comment-13592082
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Chris commented on FLEX-28793:
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This problem only occurs when an action bar is included in the layout AND the
action bar is not transitioned with the content.
By default the action bar has a separate transition from the content in a view.
So the workaround is to set transitionControlsWithContent to true at the
slideViewTransition declaration.
> SlideViewTransition causes a white background to be drawn during a
> ViewTransition when the View's skin draws a custom background
> --------------------------------------------------------------------------------------------------------------------------------
>
> Key: FLEX-28793
> URL: https://issues.apache.org/jira/browse/FLEX-28793
> Project: Apache Flex
> Issue Type: Bug
> Components: Mobile:Transitions
> Affects Versions: Adobe Flex SDK Previous
> Environment: Affected OS(s): All OS Platforms
> Language Found: English
> Reporter: Adobe JIRA
> Assignee: Adobe JIRA
> Priority: Minor
>
> Steps to reproduce:
> 1. Run the attached project
> 2. Press button on the first view
>
> Actual Results:
> A white background appears during the transition
>
> Expected Results:
> No white rectangle
>
> Workaround (if any):
> The workaround would be to set backgroundAlpha or opaqueBackground of the
> View to a non-zero value. Since these values aren't set, SlideViewTransition
> makes the bad assumption that the background is opaque and sets an
> opaqueBackground. This was to improve framerates on android devices.
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