Connect to backend web api on Android Emulator

Hi,

I'm using visual studio 2019.
I created new xamarin project, chose tabbed template and included backend web api.
I tested the app on android emulator, it worked perfectly when using MockDataStore class and returns a list of items.

Whenever I try to use AzureDataStore, the list returns No records.
I tested the link "http://localhost:5000/api/item" on emulator browser, it worked and return json items as expected.
I only can't get it worked inside the app.

Any idea?