ResHelper.java 文件源码

private Drawable getPressedEffectBeforeLollipop(CORNER_POSITION cornerPosition, int color) {
    ShapeDrawable colorDrawablePressed = getCornerStateDrawable(cornerPosition);
    colorDrawablePressed.getPaint().setColor(color);
    colorDrawablePressed.getPaint().setStyle(Paint.Style.FILL);
    colorDrawablePressed.getPaint().setAlpha(PRESSED_ALPHA_VALUE);
    colorDrawablePressed.mutate();

    StateListDrawable textBgDrawable = new StateListDrawable();
    textBgDrawable.addState(new int[]{android.R.attr.state_enabled, android.R.attr.state_pressed}, colorDrawablePressed);
    return textBgDrawable;
}