Is it impossible to use POI in Android native app?
No currently the Native API and Unity Plugin are not supporting geobased AR. You can work either with our JS API or with the Cordova, Titanium or Xamarin extension as these support geobased AR.
There is any documentation available showing how to integrate our app built on android studio with JS API, in order to get the support geobased AR?
The best way to start is to check out the sample app which comes with the SDK download package together with the respective documentation section.
Each section includes a set-up guide, which helps you set up your project. There are several POI samples included in the sample app for the JS SDK.
I hope this helps. Should you need anything further, just let me know anytime.