there is no response after I typed adb -s emulator-5554 emu finger touch 1. this is reference link https://github.com/googlesamples/android-FingerprintDialog/issues/2
Open Security Settings on your Fingerprint Emulation enabled Emulator. According to Android Developers Documentation, Register 1 or 2 fingerprints with command
adb -e emu finger touch 1
or
adb -e emu finger touch 2
and save the settings. Next time when you are prompted for the Fingerprint Authentication again enter the same command
adb -e emu finger touch 1
to successfully authenticate. I just tried and it works fine.