Don't have Telegram yet? Try it now!
https://tetzzang.com/android-%ec%b5%9c%ec%83%81%ec%9c%84-%ec%95%a1%ed%8b%b0%eb%b9%84%ed%8b%b0-%ec%a0%95%eb%b3%b4-%ea%b0%80%ec%a0%b8%ec%98%a4%ea%b8%b0/
[Android] 최상위 액티비티 정보 가져오기