manifest file com.apptreesoftware.barcodescan.BarcodeScannerActivity

[blackmakerblm]

I am facing the following issue when i add the reference activity as second activity in my manifest file it signales error in my file and when i click the scan button after launching the app it suddenly quits the app and sometime show the following exception exception not found method ...on chanel com.apptreesoftware.barcode_scan please help