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onCreate onStart onResume onPause onStop onDestroy [官方图](https://developer.android.com/guide/components/activities/?hl=zh-CN#Lifecycle) ![](https://markdown-1258186581.cos.ap-shanghai.myqcloud.com/20190608094149.png) ![Activity 生命周期](https://developer.android.com/images/activity_lifecycle.png?hl=zh-CN)