How can i call android function by ue4

Development Platform & Builds Mobile
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1

I want to use some functions like Googlemaps. so I have some problems about android in ue4,I have search some informations about it.
After that i have the following problems.

  1. how can i deal with the .so and .jar files that my function need
  2. the android studio use gradle structure. so how can i deal with gradle.
    and i am new to android. i have heard something about ant. what is it?
  3. I have know something about the APL(android plugin language) and something about GameActivity.java.
    so i have know two ways about it.one is add something in GameActivity.java and add libs under engine directory.
    the other is use copy by APL to move directory and deal with something only need changes under prohject directory.
    i just want one way that can make my need in something like Googlemaps work,so please tell me one way that you are more familiar to if you can help me.
    Thank you very much.
2

I am a little under pressure now, but till the end of the week i will post the answers on question 1 and 2 in my question:

https://answers.unrealengine.com/questions/717797/link-to-3rd-party-libraries-im-trying-to-call-the.html

If you will have more questions, just write me.