question about Activity lifecycle

[leerduo]

Hi，When i read about Activity lifecycle in chapter 4，your book said when an Activity is paused and then rotated，how is the lifecycle going? Here i add a new button to StopWatch app，and when click the button，start a new Activity，and the new Activity‘s theme is Theme.Dialog，so when start the Activity,my StopWatchActivity is in onPause method，at this moment，I rotate my device，onStop->onDestroy->onCreate->onStart->onResume->onPause is called，but the book said onResume is not called，how to understand this?

[linucksrox]

I would recommend you use the log functions inside of each of the activity lifecycle methods, then monitor logcat while your app moves through each of them. This will give you a better understanding of exactly if/when each method is called, and in what order. onResume should be called after onStart, so what you are seeing is correct. Have a look at Google's documentation: