扩展类并在多个构造函数中处理最终变量

mIndicatorItemLength )在Java中是不允许的。

class HorizontalCirclePagerIndicatorDecoration {
   ...
   private final float mIndicatorItemLength;

   HorizontalCirclePagerIndicatorDecoration() {
      mIndicatorItemLength = DP * 4;
   }

   HorizontalCirclePagerIndicatorDecoration(
         final int colorActive, 
         final int colorInactive, 
         final int mIndicatorItemLength) {
      ...
      this.mIndicatorItemLength = mIndicatorItemLength;
   }

   ...
} 

class TPagerIndicator extends HorizontalCirclePagerIndicatorDecoration {
   TPagerIndicator(
         final int colorActive,
         final int colorInactive) {
      super(colorActive, colorInactive, 12.3F /* Explicit set */);
   }

   TPagerIndicator(
         final int colorActive,
         final int colorInactive
         final int mIndicatorItemLength) {
      super(colorActive, colorInactive, mIndicatorItemLength /* Input set */);
   }

   ...
}