Yes, there is a framework called kivy that will help you with that

Python actually has its potential in the backend, you can create a web services application, where you have all the logic and services needed for your application, but for the frontend the visualisation on android is not possible with python

Yes. You can use, for example, Kivy and Python for Android.

Si, debes usar PyQt

Mas información en: The future is written with Qt: Cross-platform software development for embedded & desktop

I don't know the details of Android, but you can use Kivy. It's a Python library that allows you to make android apps and use the common things on the phone (camera, keyboard, gps, etc)

Obviously it won't have the level of an app made in Java, but for simple things you can use it.

But the complexity will be greater, although you will have more real control over the code.