Get the result from the ConfirmDeviceCredentialIntent.

MainActivity.java

@Override
protected void onActivityResult(int requestCode,
  int resultCode, Intent data) {
    if (requestCode == REQUEST_CODE_CREDENTIALS) {
        // Challenge completed, proceed with using cipher
        if (resultCode == RESULT_OK) {
            doSomeDecryptionHere();
        } else {
            // The user canceled or didn’t complete the lock screen
            // operation. Go to error/cancellation flow.
        }
    }
}