Android 前后台切换监听

class AppLifeObserver: LifecycleObserver {

    @OnLifecycleEvent(Lifecycle.Event.ON_START)
    fun onForeground() {
        LogUtils.logd("Application enters the foreground")
    }

    @OnLifecycleEvent(Lifecycle.Event.ON_STOP)
    fun onBackground() {
        LogUtils.logd("Application enters the background")
    }
}

class AppLifeObserver: LifecycleEventObserver {
    override fun onStateChanged(source: LifecycleOwner, event: Lifecycle.Event) {
        when (event){
            Lifecycle.Event.ON_RESUME -> {
                
            }
            else -> {}
        }
    }
}

再Application中调用

lifecycle.addObserver(AppLifeObserver())