android TextView 如何动态获取宽度

1.当TextView的属性是wrap_content时，如何获取其宽度，特别是在界面还没显示时，比如像在RecycleView中的情况？

TextView tv_name = findViewById(R.id.tv_name); tv_name .setText(str);
int spec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
tv_name.measure(spec,spec);
int measuredWidthTicketNum = tv_name.getMeasuredWidth();

资料来源请参考：http://www.tuicool.com/articles/JVnMbua