Can I ?

Use mysql with android apk ? php or json

Use Facebook login with android apk ? "maybe see friends"

in construct 3 ?

Use mysql with android apk ? php or json

Yes. Use the AJAX plugin to request post to a php URL with a mysql database behind it. construct.net/en/make-games/manuals/construct-3/plugin-reference/ajax

There is a JSON plugin as well.

construct.net/en/make-games/manuals/construct-3/plugin-reference/json

Use Facebook login with android apk ? "maybe see friends"

Yes, you can use Facebook log in. I don't believe the plugin has any functionality to access the friend list, although you might be able to do something directly with JavaScript, which C3 also supports.

construct.net/en/make-games/manuals/construct-3/plugin-reference/facebook

Otherwise, the Facebook Instant Games platform may have different functionality you might be interested in.

construct.net/en/make-games/manuals/construct-3/plugin-reference/instant-games

thank you very much I will study this ♥

it will works in android apk ?

I believe so.