android - 如何在Android Kotlin中检测android应用程序是否最小化
问题描述
我想使用 Kotlin 检测我的应用程序是否被最小化(我的意思是按下主页按钮)。请注意,我不是在谈论任何特定的活动或片段,我是指整个应用程序。我需要为应用程序假设三种不同的状态:在视口中显示、最小化和完全关闭。我应该如何检测前两种状态?如果android生命周期可以做到这一点,请描述如何。谢谢!
解决方案
如果按下应用程序主页按钮,您可以使用LifecycleObserver
in进行检查Application
inner class ApplicationObserver : LifecycleObserver {
@OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
fun onPause() {
}
}
要检测何时使用滑动并杀死您的应用程序,您可以使用 Service 和 u
并注册它
ProcessLifecycleOwner
.get()
.lifecycle
.addObserver(ApplicationObserver())
或覆盖 Activity 的 onUserLeaveHint 方法,该方法在按下主页按钮时运行。
/**
* 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() {
}
要检测用户何时向右滑动并完成您的应用程序,您可以使用 aService
并覆盖
override fun onTaskRemoved(rootIntent: Intent?) {
super.onTaskRemoved(rootIntent)
setRestartAppAlarm()
}
我们将此方法用于需要应用程序一直运行的展示应用程序。当商店中的客户关闭应用程序时,我们会设置警报并重新启动它。