xiaoyong

Flags can be add at `ActivityLifecycleCallbacks`. just registerActivityLifecycleCallbacks on application onCreate ```kotlin registerActivityLifecycleCallbacks(object:ActivityLifecycleCallbacks { override fun onActivityPaused(activity: Activity) { } override fun onActivityStarted(activity: Activity) { } override fun onActivityDestroyed(activity: Activity)...

> 没什么问题了。不过……这个图片里的文字，看起来好像不是中文吧？ 是的， 是日本人做的图， 但是这个不影响阅读