private void showError(CharSequence error) {
        mIcon.setImageResource(R.drawable.ic_fingerprint_error);
        mErrorTextView.setText(error);
        mErrorTextView.setTextColor(
                mErrorTextView.getResources().getColor(R.color.warning_color, null));
        mErrorTextView.removeCallbacks(mResetErrorTextRunnable);
        mErrorTextView.postDelayed(mResetErrorTextRunnable, ERROR_TIMEOUT_MILLIS);
    }
Show an error on the UI using {@link #mIcon} and {@link #mErrorTextView}
lib/src/main/java/com/github/omadahealth/lollipin/lib/managers/FingerprintUiHelper.java