private void loadBitmaps() {
        bitmapBtnDefault = getBitmapFor(R.drawable.pattern_btn_touched);
        bitmapBtnTouched = bitmapBtnDefault;
        bitmapCircleDefault = getBitmapFor(R.drawable.pattern_button_untouched);

        bitmapCircleSelected = getBitmapFor(R.drawable.pattern_circle_white);
        bitmapCircleRed = getBitmapFor(R.drawable.pattern_circle_blue);
        computeBitmapSize();
    }
Sets the bitmap for active pattern sections (the circle)

@param resId
android-patternview/src/main/java/com/eftimoff/patternview/PatternView.java