1->Fragment的返回 OnBackPressedDispatcher
2->
liveData多次触发
https://www.jianshu.com/p/cc5665f1ceb3
3-> 禁止多点触发 android:splitMotionEvents="false"
4-> ConstraintLayout Group资源名混淆问题
https://juejin.cn/post/6844903625622306823
5-> MediatorLiveData
6->setCompoundDrawablesRelativeWithIntrinsicBounds 设置图片支持镜像左右切换
7-> private val viewModel: XXViewModel by activityViewModels()
8->.FlexboxLayoutManager
9->.adb shell am start 'xx://xxx?id=1'
10-> AlarmManager 定时服务
