一、需求
BottomNavigationView右上角添加红点布局和自动跳转到底部具体第几个Tab
我们知道BottomNavigationView是在google material里面的组件
github地址如下：
https://github.com/material-components/material-components-android
二、效果图片爆照
三、BottomNavigationView右上角添加红点布局关键代码实现
var badgeView: View? = nullvar menuView: BottomNavigationMenuView? = nullvar tabView: BottomNavigationItemView? = null//得到menuViewmenuView = v.navView.getChildAt(0) as BottomNavigationMenuView?//得到底部的第三个Tab
