setDisplayHomeAsUpEnabled (true); why no response ==

As the title - is set to true why did not react to it, you also need other operations it?

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Well someone to help in the great God who ah ~
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What you mean is the role?
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reference to the second floor weiwei5910 reply:

What is the role you mean?

Should be to return to the previous Activity bar ==
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There are m someone
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