I ran the process using B4A SDK MAnager and B4A-Bridge (USB), the result was the same.
The version of B4A I am using is: 9.50.
As it was a prerequisite, I setup google api key.
I followed the tutorial is all I can say. (The result is attacked)
If the setup is not completed correctly, it is precisely my question.
Attached is the codes, versions and paths, of course google api Key is masked.
Sorry Erel and Manfred for my failure, I had forgotten an important item in the project registration with Google, or better,
connect the project to a Billable account.
Starting June 2018, the API key will not work if the project is not signed in to a billable account (even though the service is still free for mobile apps).
So I connected the project to the account and now it's working normally.