JellyBeanFloatingActionButton.java 文件源码

/**
 * more advanced usage for fillable in alpha
 *
 * @param circleRect the defined rectangle
 * @return StateListDrawable item
 */
protected StateListDrawable createFillDrawable(RectF circleRect) {
    StateListDrawable drawable = new StateListDrawable();
    drawable.addState(new int[]{android.R.attr.state_pressed}, createAlphaDrawble(circleRect, mColorPressed, mAlpha_press));
    drawable.addState(new int[]{}, createAlphaDrawble(circleRect, mColorNormal, mAlpha_normal));
    return drawable;
}