Android之应用退到后台、回到前台的判断

最新推荐文章于 2024-07-16 04:32:47 发布

Godikov

最新推荐文章于 2024-07-16 04:32:47 发布

阅读量778

点赞数 8

CC 4.0 BY-SA版权

分类专栏： Android开发文章标签： android

本文链接：https://blog.youkuaiyun.com/verynewbeee/article/details/135776227

Android开发专栏收录该内容

18 篇文章

订阅专栏

class AppLifecycle : Application.ActivityLifecycleCallbacks {

    private val tag = javaClass.simpleName
    private var mActivityCount = 0
    private var isAppForeground = true

    override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
        LogUtil.logD(tag, "onActivityCreated ${activity.javaClass.simpleName}")
    }

    override fun onActivityStarted(activity: Activity) {
        LogUtil.logD(tag, "onActivityStarted ${activity.javaClass.simpleName}")
        mActivityCount++
        if (mActivityCount > 0 && !isAppForeground) {
            LogUtil.logD(tag, "应用回到前台")
            isAppForeground = true
            BroadcastUtil.sendLocalBroadcast(activity, ACTION_UPLOAD_POSITION)
        }
    }

    override fun onActivityResumed(activity: Activity) {
        LogUtil.logD(tag, "onActivityResumed ${activity.javaClass.simpleName}")
    }

    override fun onActivityPaused(activity: Activity) {
        LogUtil.logD(tag, "onActivityPaused ${activity.javaClass.simpleName}")
    }

    override fun onActivityStopped(activity: Activity) {
        LogUtil.logD(tag, "onActivityStopped ${activity.javaClass.simpleName}")
        mActivityCount--
        if (mActivityCount == 0) {
            isAppForeground = false
            LogUtil.logD(tag, "应用退到后台")
        }
    }

    override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle) {
        LogUtil.logD(tag, "onActivitySaveInstanceState ${activity.javaClass.simpleName}")
    }

    override fun onActivityDestroyed(activity: Activity) {
        LogUtil.logD(tag, "onActivityDestroyed ${activity.javaClass.simpleName}")
    }

}

在您的项目中的Application的onCreate方法中加入：

registerActivityLifecycleCallbacks(AppLifecycle())

即可。