I am having problems using zxing library. I do everything as in this answer. And then to use library I used this tutorial. So I added core.jar in my app and a library zxing. I try to use it with this code
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
startActivityForResult(intent, 0);
And when I compile and start my app and press button which calls this code, I get unexpected error and everything is just shut down. If I have a bar code scanner installed on my device and if I dont use this library, it works fine. But I have to use the app with phones without Internet connection, so I have to get this library working.
Thanks