1. Turn on the USB debugging mode on the phone
2.Android studio download the corresponding Android version (in SDK Manager)
3. Inside Android Studio: APP-Edit Configurations...-Target-USB Device select OK
4. If it fails, open Android Device Monitor and display the device unknow
5. Well, change phone, no developer options found
6. Open the phone settings - about phone - click the version number continuously, prompting you to enter the developer mode
7. Settings-Accessibility-Developer Options-Turn on USB debugging, allow debugging as required
8. Android Studio click RUN to automatically download the corresponding version of the Android version
9. Click RUN again, the installation is allowed on the phone, success!