zhengshihan created WEEX-69:
-------------------------------

             Summary: Replace Facebook's Yoga in Weex with Google's 
FlexboxLayout to avoid potential license issue.
                 Key: WEEX-69
                 URL: https://issues.apache.org/jira/browse/WEEX-69
             Project: Weex
          Issue Type: Improvement
          Components: Android, iOS
    Affects Versions: 0.12, 0.13, 0.14, 0.15, 0.16
            Reporter: zhengshihan
            Assignee: zhengshihan
            Priority: Blocker


As we know,[The Apache Software Foundation bans the usage of Facebook 
BSD+Patents licensed in Apache 
products|https://www.apache.org/legal/resolved.html#category-x]
The Facebook BSD+Patents license includes a specification of a PATENTS file 
that passes along risk to downstream consumers of our software imbalanced in 
favor of the licensor, not the licensee, thereby violating our Apache legal 
policy of being a universal donor. The terms of Facebook BSD+Patents license 
are not a subset of those found in the ALv2, and they cannot be sublicensed as 
ALv2.” 
        Weex-Team have heard the news and we decide to remove Facebook Yoga 
with its additional Facebook BSD+Patents license.  In order to release the next 
version as soon as possible, we will create a new LayoutEngine based on [the 
Google 's Flex-Layout|https://github.com/google/flexbox-layout]. 



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