,btn.setTextColor (R.color.main_color);
,,改为下面方法即可,通过上下文获取颜色值
btn.setTextColor (context.getResources () .getColor (R.color.main_color));
,btn.setTextColor (R.color.main_color);
,,改为下面方法即可,通过上下文获取颜色值
btn.setTextColor (context.getResources () .getColor (R.color.main_color));