I think it solved :D i declared the onclick listener in mainactivity java 
(in fragment class no) in the switch that i choose what fragment show.

El lunes, 19 de septiembre de 2016, 17:48:25 (UTC+2), Arturo escribió:
> Hi, I'm starting with the programming on android, I encounter the 
> following problems:
> 1ºProblem (solved but need explanation)- Spinner empty in fragment using 
> array adapter, i solved using array in xml and use 
> arrayadapterfromresource,Here I explain everything 
> http://stackoverflow.com/questions/39544972/spinner-shows-empty-when-use-fragment
> <http://stackoverflow.com/questions/39544972/spinner-shows-empty-when-use-fragment>
> 2ºProblem- Onclick listener doesnt work in my button, (follow the 
> developer documentation about this, you can see the topic here 
> http://stackoverflow.com/questions/39544972/spinner-shows-empty-when-use-fragment
>  and 
> download my project if you want).
> The documentation that i follow 
> https://developer.android.com/guide/topics/ui/controls/button.html#HandlingEvents
> I decided to open this topic here because I see that it is not solved in 
> stackoverflow

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