How many time I have to start startSmsRetriever to retrive SMS multiple time using SMS Retriever API?

Question

I need to retrive SMS in different activities several times.

For SMS retrive I start smsRetriver in my activity.

SmsRetrieverClient client = SmsRetriever.getClient(context);
Task<Void> task = client.startSmsRetriever();

If I have to to do it every time or once in an Application?