public void refresh(int pinLength) {
        mCurrentLength = pinLength;
        for (int i = 0; i < mRoundViews.size(); i++) {
            if (pinLength - 1 >= i) {
                mRoundViews.get(i).setImageDrawable(mFullDotDrawableId);
            } else {
                mRoundViews.get(i).setImageDrawable(mEmptyDotDrawableId);
            }
        }
    }
Refresh the {@link android.widget.ImageView}s to look like what typed the user

@param pinLength the current pin code length typed by the user
lib/src/main/java/com/github/omadahealth/lollipin/lib/views/PinCodeRoundView.java