Enable the developer options in you android phone:
Open the Settings app.
Select System.
Scroll to the bottom and select About phone.
Scroll to the bottom and tap Build number 7 times.
Return to the previous screen to find Developer options near the bottom.
Open Developer options, and then scroll down to find and enable USB debugging.
Connect your phone using USB to your laptop
select Developer Option in setting on your phone
Enable USB debugging
Android Studio
Click run on android studio
Select your phone to run your application
It will install application on your phone and run application my mobile phone.
refer https://developer.android.com/training/basics/firstapp/running-app for detailed description.