Android: display a web page and letting user login to get the feedly access token

I am trying to write an Android app to access and display Feedly subscriptions to the user.

For this purpose , I need to post a URL to Feedly API and in return it send back HTML code for login page.

URL example to post:

https://sandbox7.feedly.com/v3/auth/auth?client_id=sandbox&redirect_uri=http%3A%2F%2Flocalhost&scope=https://cloud.feedly.com/subscriptions&response_type=code

Here, I use http://localhost as redirect URI because I am not hosting anything for this application.

after the user logs in, Feedly API redirects a code to http://localhost

Now, I have 2 issues:1. I don't know how to display the web page for login on Android. How can I do that and let the user login ? What is the best practice for such purpose ?2. How can I get the access token which is sent back to the redirect URI as a parameter ?

for the first question maybe I can use webview as suggested in another question. How to display a webpage in android?

BUT then how shall I get the code returning to the redirect_uri ?

Thanks.