TextView tv = (TextView) findViewById(R.id. text_view );
// 中间加横线 ， 添加Paint.ANTI_ALIAS_FLAG是线会变得清晰去掉锯齿
tv.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG | Paint.ANTI_ALIAS_FLAG );
// 底部加横线 ， 添加Paint.ANTI_ALIAS_FLAG是线会变得清晰去掉锯齿
tv .getPaint().setFlags(Paint. UNDERLINE_TEXT_FLAG | Paint.ANTI_ALIAS_FLAG );
tv.setPaintFlags(tv.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG);