No1  Scanner folder includes: jar packet(SDK), Android scanning development document(doc), scanning sample program(SRC)

No2  For Android Scan, we currently have two development modes, one for calling hardware interfaces, and the other for receiving scanning tool broadcast development mode:
         1) How to call the interface:
               Document: Android Scan Interface Document
               Demo: ScannerAPITest
               SDK: Scanner API
         2)How to call the broadcast:
                Document: Android Scan Service Interface Configuration
                       Demo: Scanner Service SettingsTest

No3    Note: Only one of the two methods can be selected, and the two methods can not be used in the same APP.(It is recommended that users use the broadcast method to develop less, convenient and fast)