How to install an app on an android phone using Android studio?

First, you have to export a full .apk for your application correctly, see instructions here, after that you need to somehow download that file to your device. You can upload it on any hosting (email attachment even, for example), I just think that's the simplest way install/run app without plugging your phone.

If something wrong occured when running, please re-check some option below:
- Check your log if any error shown
- Check your .xml files define your application layouts in folder: res/layout

If you go to the bin folder you should find the .apk file there. But that .apk file is not capable of being uploaded to market. In order to get a fully working .apk file you should export it as an android project and once that is done you should start off by uninstalling the application from your phone since running it from pc through phone installs the apk there. Once it's uninstalled you can transfer the apk file you exported to your phone and install it.