Android - Scandit Barcode Scanner issues with EAN-13

Question

I implemented the scandit library in my google glass project, but if I'm scanning EAN-13 barcodes the last digit is always wrong. For example: I'm scanning a code with the value 2220141633626 and the result is 2220141633624.

This is my code in Activity 1:

public void didScanBarcode(String content, String format) {
    // send the result to another activity.
    Intent resultIntent = new Intent(this, TestingActivity.class);
    resultIntent.putExtra("scanContent", content);
    Log.v("scanbarcode", content);
    startActivity(resultIntent);
}

This is my code in Activity 2:

protected void onCreate(Bundle bundle) {
    super.onCreate(bundle);
    setContentView(R.layout.testing);

    Intent resultIntent = getIntent();
    String scanContent = resultIntent.getExtras().getString("scanContent");
    serialNumber = Long.parseLong(scanContent);
    Log.e("string ", "" + scanContent);
    Log.e("long ", "" + serialNumber);

}

The content is already wrong in the didScanBarcode method of my first activity.

Answer 1

2220141633626 is not a valid EAN-13 code, while 2220141633624 is.

The first 12 numbers are the actual number, while the 13th is the 'check digit'. The check digit of 222014163362 is 4.

See for example http://www.morovia.com/education/utility/upc-ean.asp, enter 222014163362 in the ean-13 field and press 'calculate'