Hello,
I have gone through your requirements, you want to build exo player app.
Let me first clear, I can build android app for exo player using java code.
If you want to build android app then contact me.
Let me tell you about myself, I have worked on more than 50 android applications in five years of my professional career.
I have expertise in android development, full knowledge of Android life cycle - Material design - REST api - Sqlite database - Payment integration - Third party library integration - Background services - Firebase.
One more thing I am full time freelancer so will always available for support and communication.
Let me know if you are interested, I am ready to discuss everything before you award me this task.
Thanks,
Hardip