Label.java 文件源码

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
    void onActionUp() {
        if(mUsingStyle) {
            mBackgroundDrawable = getBackground();
        }

        if(mBackgroundDrawable instanceof StateListDrawable) {
            StateListDrawable drawable = (StateListDrawable) mBackgroundDrawable;
            drawable.setState(new int[] {});
        } else if(Util.hasLollipop() && mBackgroundDrawable instanceof RippleDrawable) {
            RippleDrawable ripple = (RippleDrawable) mBackgroundDrawable;
            ripple.setState(new int[] {});
            ripple.setHotspot(getMeasuredWidth() / 2, getMeasuredHeight() / 2);
            ripple.setVisible(true, true);
        }
//        setPressed(false);
    }