Android Question Error exoplayer !!! help

[Nkalampika]

hello I have a problem that I do not understand. when I choose the library exoplayer I get an error.
I would like to play a streaming video.

 

[Nkalampika]

when I run the sample file, everything works fine! but when I do it in my project I get an error

 

[Erel]

Please post error messages as text.

but when I do it in my project I get an error

It will help if you provide more information and explain the difference between the example project and your project.

 

[Nkalampika]

fixed / thanks Erel