如何获得可绘制波纹按钮的颜色

Question

我有各种各样的按钮，我想要获得它们的背景颜色，获取可绘制颜色的背景颜色很容易，但它不容易绘制波纹，我该如何管理从波纹可绘制的背景颜色。

Answer 1

请检查下面的例子在Android的连锁反应..

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

Answer 2

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(); 
    }