Datalogic Android SDK sample source code is available on Github for either Android Studio and Eclipse ADT.
Decode Listener
Decode Listener×

Scan barcodes using a ReadListener: the simplest barcode scanner application

Decode Config Sample API
Decode Config Sample API×

Configure barcode scanner properties

Device Sample API
Device Sample API×

Access common info and control the device

Decode Sample API
Decode Sample API×

Use Datalogic Decoding API

Barcode Scanner HTML5
Barcode Scanner HTML5×

HTML5 BarcodeScanner app based on Datalogic BarcodeManager