A summary of the strange problems encountered will be added little by little

Error while executing: am startservice com.dyh.drivingschool/com.android.tools.fd.runtime.InstantRunService
Starting service: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.dyh.drivingschool/com.android.tools.fd.runtime.InstantRunService launchParam=MultiScreenLaunchParams { mDisplayId=0 mFlags=0 } }
Error: Not found; no service started.

Project APK conflict, uninstall the emulator or the APK file on the phone or directly uninstall to the App. Just run it again