android利用handler实现倒计时功能

本文实例为大家分享了android利用handler实现倒计时的具体代码，供大家参考，具体内容如下 xml <?xml version=1.0 encoding=utf-8?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android=http://schemas.android.com/apk/res/android xmlns:app=http://schemas.android.com/apk/res-auto xmlns:tools=http://schemas.android.com/to