android - 如何获取带有波纹可绘制的按钮的颜色

Question

我有各种按钮，我想获取它们的背景颜色，在颜色可绘制中获取背景颜色很容易，但在波纹可绘制中并不容易，我如何设法从波纹可绘制中获取背景颜色。

Answer 1

试试这个:

 RippleDrawable rippleDrawable = (RippleDrawable) button.getBackground();
 Drawable.ConstantState state = rippleDrawable.getConstantState();
 try {
     Field colorField = state.getClass().getDeclaredField("mColor");
     colorField.setAccessible(true);
     ColorStateList colorStateList = (ColorStateList) colorField.get(state);
     int rippleColor = colorStateList.getDefaultColor();
  } catch (NoSuchFieldException e) {
      e.printStackTrace();
  } catch (IllegalAccessException e) {
      e.printStackTrace();
  }