LEDColorListPreference.java 文件源码

private void setPreviewColor(@NonNull String value) {
  int color;

  switch (value) {
    case "green":   color = getContext().getResources().getColor(R.color.green_500);   break;
    case "red":     color = getContext().getResources().getColor(R.color.red_500);     break;
    case "blue":    color = getContext().getResources().getColor(R.color.blue_500);    break;
    case "yellow":  color = getContext().getResources().getColor(R.color.yellow_500);  break;
    case "cyan":    color = getContext().getResources().getColor(R.color.cyan_500);    break;
    case "magenta": color = getContext().getResources().getColor(R.color.pink_500);    break;
    case "white":   color = getContext().getResources().getColor(R.color.white);       break;
    default:        color = getContext().getResources().getColor(R.color.transparent); break;
  }

  if (colorImageView != null) {
    GradientDrawable drawable = new GradientDrawable();
    drawable.setShape(GradientDrawable.OVAL);
    drawable.setColor(color);

    colorImageView.setImageDrawable(drawable);
  }
}