PhialButton.java 文件源码

@Override
protected void onDraw(Canvas canvas) {
    int w = getWidth();
    int h = getHeight();

    int cx = w / 2;
    int cy = (int) (h / 2f - getShadowDy());

    int radius = (int) (Math.min(w, h) / 2f - shadowSize);

    canvas.drawCircle(cx, cy, radius, bgPaint);

    if (icon != null) {
        final int targetW = getIconSize(2 * radius, icon.getIntrinsicWidth());
        final int targetH = getIconSize(2 * radius, icon.getIntrinsicHeight());
        icon.setBounds(cx - targetW / 2, cy - targetH / 2, cx + targetW / 2, cy + targetH / 2);
        icon.draw(canvas);
    }
}