Android中横竖屏切换时Activity的生命周期执行情况
1.默认情况下生命周期
（1）第一次进入界面
11-17 13:55:18.452: E/ImageListActivity(10586): onCreate
11-17 13:55:18.462: E/ImageListActivity(10586): onContentChanged
11-17 13:55:18.472: E/ImageListActivity(10586): onStart
11-17 13:55:18.482: E/ImageListActivity(10586): onPostCreate
11-17 13:55:18.482: E/ImageListActivity(10586): onResume
11-17 13:55:18.492: E/ImageListActivity(10586): onPostResume
（2）切换成横平时
11-17 13:56:47.622: E/ImageListActivity(10586): onPause
11-17 13:56:47.622: E/ImageListActivity(10586): onStop
11-17 13:56:47.622: E/ImageListActivity(10586): onDestroy
11-17 13:56:47.632: E/ImageListActivity(10586): onCreate
11-17 13:56:47.642: E/ImageListActivity(10586): onContentChanged
11-17 13:56:47.702: E/ImageListActivity(10586): onStart
11-17 13:56:47.702: E/ImageListActivity(10586): onPostCreate
11-17 13:56:47.702: E/ImageListActivity(10586): onResume
11-17 13:56:47.702: E/ImageListActivity(10586): onPostResume
（3）切换回竖屏时
11-17 13:57:17.682: E/ImageListActivity(10586): onPause
11-17 13:57:17.682: E/ImageListActivity(10586): onStop
11-17 13:57:17.682: E/ImageListActivity(10586): onDestroy
11-17 13:57:17.682: E/ImageListActivity(10586): onCreate
11-17 13:57:17.692: E/ImageListActivity(10586): onContentChanged
11-17 13:57:17.732: E/ImageListActivity(10586): onStart
11-17 13:57:17.732: E/ImageListActivity(10586): onPostCreate
11-17 13:57:17.732: E/ImageListActivity(10586): onResume
11-17 13:57:17.732: E/ImageListActivity(10586): onPostResume
2.在配置文件中设置Activity标签属性android:configChanges=”orientation”（具体请查看文章“Android禁止横竖屏切换或禁止横竖屏切换时重启Activity“）后的生命周期
（1）第一次进入界面
11-17 14:01:20.912: E/ImageScanActivity(10586): onCreate
11-17 14:01:20.922: E/ImageScanActivity(10586): onContentChanged
11-17 14:01:20.922: E/ImageScanActivity(10586): onStart
11-17 14:01:20.922: E/ImageScanActivity(10586): onPostCreate
11-17 14:01:20.922: E/ImageScanActivity(10586): onResume
11-17 14:01:20.922: E/ImageScanActivity(10586): onPostResume
11-17 14:01:20.992: E/ImageListActivity(10586): onStop
（2）切换成横平时
11-17 14:02:01.932: E/ImageScanActivity(10586): onConfigurationChanged
（3）切换回竖屏时
11-17 14:03:06.292: E/ImageScanActivity(10586): onConfigurationChanged
