How to get color of a button with ripple drawable

问题

I have variety of buttons and I would like to get their background color, getting background color in a color drawable is easy but it is not easy in ripple drawable, how can I manage to get background color from ripple drawable.

回答1:

Try this:

 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();
  }

回答2:

please check following example for ripple effect in android..

http://www.viralandroid.com/2015/09/how-to-add-ripple-effect-to-android-button.html

来源：https://stackoverflow.com/questions/36352945/how-to-get-color-of-a-button-with-ripple-drawable