Android 随手记

1.广播

1.注册，解绑，订阅

添加action，发广播例如...sendBroadcast(intent), intent有一个action,所以注册需要匹配action

2.recyclerview

//onCreateViewHolder(parent: ViewGroup, viewType: Int)
override fun getItemViewType(position: Int)中可以用data(position)+for循环