如果按下应用程序主页按钮，您可以在Application中使用LifecycleObserver进行检查

inner class ApplicationObserver : LifecycleObserver {
    @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
    fun onPause() {
    }
    
}

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要检测何时使用刷卡和杀死您的应用程序，您可以使用服务，您可以将其注册为

ProcessLifecycleOwner
            .get()
            .lifecycle
            .addObserver(ApplicationObserver())

型
或覆盖Activity的onUserLeaveHint方法，该方法在按下home按钮时运行。

/**
 * Called as part of the activity lifecycle when an activity is about to go
 * into the background as the result of user choice.  For example, when the
 * user presses the Home key, {@link #onUserLeaveHint} will be called, but
 * when an incoming phone call causes the in-call Activity to be automatically
 * brought to the foreground, {@link #onUserLeaveHint} will not be called on
 * the activity being interrupted.  In cases when it is invoked, this method
 * is called right before the activity's {@link #onPause} callback.
 *
 * <p>This callback and {@link #onUserInteraction} are intended to help
 * activities manage status bar notifications intelligently; specifically,
 * for helping activities determine the proper time to cancel a notification.
 *
 * @see #onUserInteraction()
 * @see android.content.Intent#FLAG_ACTIVITY_NO_USER_ACTION
 */
protected void onUserLeaveHint() {
}

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要检测用户何时向右滑动并完成应用，您可以使用Service并覆盖

override fun onTaskRemoved(rootIntent: Intent?) {
    super.onTaskRemoved(rootIntent)
    setRestartAppAlarm()
}

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我们将此方法用于一个展示应用程序，该应用程序要求应用程序始终工作。当商店中的客户关闭应用程序时，我们设置一个闹钟并重新启动它。